import React, { useState, useCallback, useEffect } from 'react';
import { InputForm } from './components/InputForm';
import { StepDisplay } from './components/StepDisplay';
import { LoadingSpinner, BotIcon, SparklesIcon, MarkdownIcon, PrintIcon } from './components/Icons';
import { ExportMenu } from './components/ExportMenu';
import { translations } from './constants';
import type { AnalysisStep, AnalysisData, InputData, Project, ProjectMetadata } from './types';
import { generateMarkdown, downloadFile } from './services/export';
import { History, Clock, Trash2, X, ArrowRight, FolderOpen } from 'lucide-react';

const API_BASE_URL = 'api';

// --- DB HELPERS ---
const listProjects = async (): Promise<ProjectMetadata[]> => {
    const response = await fetch(`${API_BASE_URL}/projects`);
    if (!response.ok) throw new Error("Failed to list projects");
    return await response.json();
};

const loadProjectData = async (id: string): Promise<Project> => {
    const response = await fetch(`${API_BASE_URL}/projects/${id}`);
    if (!response.ok) throw new Error("Failed to load project");
    return await response.json();
};

const saveProject = async (data: any): Promise<any> => {
    const response = await fetch(`${API_BASE_URL}/save-project`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(data)
    });
    if (!response.ok) throw new Error("Failed to save project");
    return await response.json();
};

const deleteProject = async (id: string): Promise<any> => {
    const response = await fetch(`${API_BASE_URL}/projects/${id}`, {
        method: 'DELETE'
    });
    if (!response.ok) throw new Error("Failed to delete project");
    return await response.json();
};


const App: React.FC = () => {
    const [inputData, setInputData] = useState<InputData>({
        companyUrl: '',
        language: 'de',
        regions: '',
        focus: '',
        channels: ['LinkedIn', 'Kaltmail', 'Landingpage']
    });
    const [analysisData, setAnalysisData] = useState<Partial<AnalysisData>>({});
    const [isLoading, setIsLoading] = useState<boolean>(false);
    const [error, setError] = useState<string | null>(null);
    const [generationStep, setGenerationStep] = useState<number>(0); // 0: idle, 1-6: step X is complete
    const [selectedIndustry, setSelectedIndustry] = useState<string>('');
    const [batchStatus, setBatchStatus] = useState<{ current: number; total: number; industry: string } | null>(null);
    const [isEnriching, setIsEnriching] = useState<boolean>(false);


    // Project Persistence
    const [projectId, setProjectId] = useState<string | null>(null);
    const [projectName, setProjectName] = useState<string>('');
    const [showHistory, setShowHistory] = useState(false);
    const [recentProjects, setRecentProjects] = useState<ProjectMetadata[]>([]);
    const [isLoadingProjects, setIsLoadingProjects] = useState(false);

    const t = translations[inputData.language];
    const STEP_TITLES = t.stepTitles;
    const STEP_KEYS: (keyof AnalysisData)[] = ['offer', 'targetGroups', 'personas', 'painPoints', 'gains', 'messages', 'customerJourney'];

    const handleEnrichRow = async (productName: string, productUrl?: string) => {
        setIsEnriching(true);
        setError(null);
        try {
            const response = await fetch(`${API_BASE_URL}/enrich-product`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    productName,
                    productUrl,
                    language: inputData.language
                }),
            });
            if (!response.ok) {
                const errorData = await response.json();
                throw new Error(errorData.details || `HTTP error! status: ${response.status}`);
            }
            const newRow = await response.json();
            setAnalysisData(prev => {
                const currentOffer = prev.offer || { headers: [], rows: [], summary: [] };
                return {
                    ...prev,
                    offer: {
                        ...currentOffer,
                        rows: [...currentOffer.rows, newRow]
                    }
                };
            });
        } catch (e) {
            console.error(e);
            setError(e instanceof Error ? `Fehler beim Anreichern: ${e.message}` : 'Unbekannter Fehler beim Anreichern.');
        } finally {
            setIsEnriching(false);
        }
    };
    

    // --- AUTO-SAVE EFFECT ---
    useEffect(() => {
        if (generationStep === 0 || !inputData.companyUrl) return;

        const saveData = async () => {
            let dynamicName = projectName;
            try {
                const urlObj = new URL(inputData.companyUrl.startsWith('http') ? inputData.companyUrl : `https://${inputData.companyUrl}`);
                const host = urlObj.hostname.replace('www.', '');
                
                if (generationStep >= 1) {
                    dynamicName = `${host} (Step ${generationStep})`;
                } else {
                    dynamicName = `Draft: ${host}`;
                }
            } catch (e) {
                dynamicName = projectName || "Untitled Project";
            }

            const dataToSave = {
                id: projectId,
                name: dynamicName,
                currentStep: generationStep,
                language: inputData.language,
                inputs: inputData,
                analysisData: analysisData
            };

            try {
                const result = await saveProject(dataToSave);
                if (result.id && !projectId) {
                    setProjectId(result.id);
                }
            } catch (e) {
                console.error("Auto-save failed", e);
            }
        };

        const timer = setTimeout(saveData, 2000);
        return () => clearTimeout(timer);
    }, [generationStep, analysisData, inputData, projectId, projectName]);

    // --- DB ACTIONS ---
    const fetchProjects = useCallback(async () => {
        setIsLoadingProjects(true);
        try {
            const projects = await listProjects();
            setRecentProjects(projects);
        } catch (e) {
            console.error("Failed to load projects", e);
        } finally {
            setIsLoadingProjects(false);
        }
    }, []);

    useEffect(() => {
        if (showHistory) fetchProjects();
    }, [showHistory, fetchProjects]);

    const handleProjectSelect = async (id: string) => {
        setIsLoading(true);
        setError(null);
        try {
            const project = await loadProjectData(id);
            setProjectId(project.id);
            setProjectName(project.name);
            setInputData(project.inputs);
            setAnalysisData(project.analysisData);
            setGenerationStep(project.currentStep);
            setShowHistory(false);
        } catch (e) {
            console.error(e);
            setError("Fehler beim Laden des Projekts.");
        } finally {
            setIsLoading(false);
        }
    };

    const handleDeleteProject = async (e: React.MouseEvent, id: string) => {
        e.stopPropagation();
        if (confirm(t.language === 'de' ? "Projekt wirklich löschen?" : "Delete project?")) {
            try {
                await deleteProject(id);
                fetchProjects();
                if (id === projectId) {
                    handleRestart();
                }
            } catch (e) {
                console.error(e);
                alert("Fehler beim Löschen.");
            }
        }
    };

    const handleRestart = () => {
        setProjectId(null);
        setProjectName('');
        setAnalysisData({});
        setGenerationStep(0);
        setSelectedIndustry('');
        setBatchStatus(null);
        setError(null);
    };

    // --- IMPORT MARKDOWN ---
    const handleImportMarkdown = (event: React.ChangeEvent<HTMLInputElement>) => {
        const file = event.target.files?.[0];
        if (!file) return;

        const reader = new FileReader();
        reader.onload = (e) => {
            const content = e.target?.result as string;
            if (!content) return;

            try {
                const newAnalysisData: Partial<AnalysisData> = {};
                
                // Helper to parse table from a section
                const parseSection = (sectionTitle: string): string[][] => {
                    const sectionRegex = new RegExp(`## ${sectionTitle}[\\s\\S]*?(?=## |$)`, 'i');
                    const match = content.match(sectionRegex);
                    if (!match) return [];
                    
                    const lines = match[0].split('\n');
                    const rows: string[][] = [];
                    let inTable = false;
                    
                    for (const line of lines) {
                        if (line.trim().startsWith('|') && !line.includes('---')) {
                            const cells = line.split('|').map(c => c.trim()).filter(c => c);
                            if (cells.length > 0) {
                                if (!inTable) {
                                    // Skip header row if we are just starting (assuming we have default headers or don't need them for raw data)
                                    // Actually, we usually want data rows. The first row in MD table is header.
                                    // Let's rely on standard markdown table structure: Header | Separator | Data
                                    inTable = true; 
                                } else {
                                     rows.push(cells);
                                }
                            }
                        }
                    }
                    // Remove the header row if captured (simple heuristic: first row is usually header)
                    if (rows.length > 0) rows.shift(); 
                    return rows;
                };

                // Mapping MD titles to keys
                // Note: flexible matching for DE/EN titles
                newAnalysisData.offer = { 
                    summary: [], 
                    headers: t.stepTitles.offer.includes('Schritt') ? ["Produkt/Lösung", "Beschreibung", "Kernfunktionen", "Differenzierung", "Quelle"] : ["Product/Solution", "Description", "Core Features", "Differentiation", "Source"], 
                    rows: parseSection("Schritt 1") 
                };
                if (newAnalysisData.offer.rows.length === 0) newAnalysisData.offer.rows = parseSection("Step 1");

                newAnalysisData.targetGroups = { 
                    summary: [], 
                    headers: t.stepTitles.targetGroups.includes('Schritt') ? ["Zielbranche", "Merkmale", "Region", "Quelle"] : ["Target Industry", "Characteristics", "Region", "Source"],
                    rows: parseSection("Schritt 2") 
                };
                if (newAnalysisData.targetGroups.rows.length === 0) newAnalysisData.targetGroups.rows = parseSection("Step 2");

                newAnalysisData.personas = { 
                    summary: [], 
                    headers: [], 
                    rows: parseSection("Schritt 3") 
                };
                if (newAnalysisData.personas.rows.length === 0) newAnalysisData.personas.rows = parseSection("Step 3");

                newAnalysisData.painPoints = { 
                    summary: [], 
                    headers: [], 
                    rows: parseSection("Schritt 4") 
                };
                if (newAnalysisData.painPoints.rows.length === 0) newAnalysisData.painPoints.rows = parseSection("Step 4");
                
                newAnalysisData.gains = { 
                    summary: [], 
                    headers: [], 
                    rows: parseSection("Schritt 5") 
                };
                if (newAnalysisData.gains.rows.length === 0) newAnalysisData.gains.rows = parseSection("Step 5");

                newAnalysisData.messages = { 
                    summary: [], 
                    headers: [], 
                    rows: parseSection("Schritt 6") 
                };
                if (newAnalysisData.messages.rows.length === 0) newAnalysisData.messages.rows = parseSection("Step 6");

                newAnalysisData.customerJourney = { 
                    summary: [], 
                    headers: [], 
                    rows: parseSection("Schritt 7") 
                };
                if (newAnalysisData.customerJourney.rows.length === 0) newAnalysisData.customerJourney.rows = parseSection("Step 7");


                setAnalysisData(newAnalysisData);
                setGenerationStep(7); // Jump to end (now 7)
                setProjectName(file.name.replace('.md', ' (Imported)'));
                setProjectId(null); // Treat as new project
                
            } catch (err) {
                console.error("Parse error", err);
                setError("Fehler beim Importieren der Datei.");
            }
        };
        reader.readAsText(file);
    };

    const handleStartGeneration = useCallback(async () => {
        if (!inputData.companyUrl) {
            setError('Bitte geben Sie eine Unternehmens-URL ein.');
            return;
        }
        setIsLoading(true);
        setError(null);
        setAnalysisData({});
        setGenerationStep(0);
        setSelectedIndustry('');
        setBatchStatus(null);

        try {
            const response = await fetch(`${API_BASE_URL}/start-generation`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    companyUrl: inputData.companyUrl,
                    language: inputData.language,
                    regions: inputData.regions,
                    focus: inputData.focus,
                }),
            });

            if (!response.ok) {
                const errorData = await response.json();
                throw new Error(errorData.details || `HTTP error! status: ${response.status}`);
            }

            const parsedData = await response.json();
            
            if (parsedData.error) {
                throw new Error(parsedData.error);
            }

            setAnalysisData(parsedData);
            setGenerationStep(1);

        } catch (e) {
            console.error(e);
            setError(e instanceof Error ? `Ein Fehler ist aufgetreten: ${e.message}` : 'Ein unbekannter Fehler ist aufgetreten.');
        } finally {
            setIsLoading(false);
        }
    }, [inputData]);
    
    const handleGenerateNextStep = useCallback(async () => {
        if (generationStep >= 7) return;

        if (generationStep === 5 && !selectedIndustry) {
            setError('Bitte wählen Sie eine Fokus-Branche aus.');
            return;
        }

        setIsLoading(true);
        setError(null);
        
        try {
            const response = await fetch(`${API_BASE_URL}/next-step`, {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/json' },
                 body: JSON.stringify({
                    analysisData,
                    language: inputData.language,
                    channels: inputData.channels,
                    generationStep: generationStep + 1, // Pass the step we want to generate
                    focusIndustry: (generationStep === 5 || generationStep === 6) ? selectedIndustry : undefined,
                 }),
            });

            if (!response.ok) {
                const errorData = await response.json();
                throw new Error(errorData.details || `HTTP error! status: ${response.status}`);
            }

            const parsedData = await response.json();
            
            if (parsedData.error) {
                throw new Error(parsedData.error);
            }

            setAnalysisData(prev => ({ ...prev, ...parsedData }));
            setGenerationStep(prev => prev + 1);

        } catch (e) {
            console.error(e);
            setError(e instanceof Error ? `Ein Fehler ist aufgetreten: ${e.message}` : 'Ein unbekannter Fehler ist aufgetreten.');
             setGenerationStep(prev => prev); // Stay on the current step if error
        } finally {
            setIsLoading(false);
        }
    }, [analysisData, generationStep, inputData.channels, inputData.language, selectedIndustry]);

    const handleBatchGenerate = useCallback(async () => {
        if (!analysisData.targetGroups?.rows) return;
        
        const industries = analysisData.targetGroups.rows.map(row => row[0]);
        if (industries.length === 0) return;

        setIsLoading(true);
        setError(null);
        setGenerationStep(6); // Show the Step 6 container (will be filled incrementally)
        
        // Initialize Step 6 data container
        setAnalysisData(prev => ({
            ...prev,
            messages: {
                summary: ["Batch-Analyse aller Branchen läuft..."],
                headers: ["Fokus-Branche", "Rolle", "Kernbotschaft", "Kanäle"], // Default headers, will be overwritten/verified
                rows: []
            }
        }));

        let aggregatedRows: string[][] = [];
        let capturedHeaders: string[] = [];

        for (let i = 0; i < industries.length; i++) {
            const industry = industries[i];
            setBatchStatus({ current: i + 1, total: industries.length, industry });

            try {
                const response = await fetch(`${API_BASE_URL}/next-step`, {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({
                        analysisData, // Pass full context
                        language: inputData.language,
                        channels: inputData.channels,
                        generationStep: 6,
                        focusIndustry: industry,
                    }),
                });

                if (!response.ok) throw new Error(`HTTP error for ${industry}`);
                const data = await response.json();
                
                if (data.messages && data.messages.rows) {
                    if (capturedHeaders.length === 0 && data.messages.headers) {
                        capturedHeaders = data.messages.headers;
                    }
                    aggregatedRows = [...aggregatedRows, ...data.messages.rows];
                    
                    // Update state incrementally so user sees results growing
                    setAnalysisData(prev => ({
                        ...prev,
                        messages: {
                            summary: ["Vollständige Analyse über alle identifizierten Branchen."],
                            headers: capturedHeaders.length > 0 ? capturedHeaders : (prev?.messages?.headers || []),
                            rows: aggregatedRows
                        }
                    }));
                }

            } catch (e) {
                console.error(`Error processing industry ${industry}:`, e);
                // We continue with next industry even if one fails
            }
        }

        setIsLoading(false);
        setBatchStatus(null);
    }, [analysisData, inputData]);

    const handleDataChange = <K extends keyof AnalysisData>(step: K, newData: AnalysisData[K]) => {
         if (analysisData[step]) {
            setAnalysisData(prev => prev ? { ...prev, [step]: newData } : { [step]: newData });
        }
    };
    
    const handleStepRestart = (stepKey: keyof AnalysisData) => {
        const stepIndex = STEP_KEYS.indexOf(stepKey);
        if (stepIndex === -1) return;
        
        // Reset steps from this index onwards
        // But specifically, if I restart Step 2, I want generationStep to be 1 (so I can generate Step 2 again)
        // If I restart Step 1 (index 0), I want generationStep to be 0
        
        // But wait, if I restart Step 1 (Offer), that is the "Start Generation" button usually.
        // Actually, if I restart Step 1, I basically want to clear everything and go back to step 0.
        // If I restart Step 2, I want to keep Step 1, clear Step 2+, and go back to step 1 (ready to generate step 2).
        
        const newGenerationStep = stepIndex;
        
        setGenerationStep(newGenerationStep);
        setAnalysisData(prev => {
            const newData: Partial<AnalysisData> = { ...prev };
            // Remove all keys starting from this step
            for (let i = stepIndex; i < STEP_KEYS.length; i++) {
                delete newData[STEP_KEYS[i]];
            }
            return newData;
        });
        
        // Also reset other state related to progress
        if (stepKey === 'messages' || stepKey === 'targetGroups') {
             // If we are resetting before Step 6, clear selection
             // Actually if we reset Step 6 (messages), we clear Step 6 data.
             if (stepIndex <= 5) {
                 setBatchStatus(null);
                 // We might want to keep selectedIndustry if we are just retrying Step 6? 
                 // But the prompt implies "resetting", so clearing selection is safer.
                 setSelectedIndustry(''); 
             }
        }
        
        // If resetting Step 7, clear its specific state if any (none currently)
    };
    
    const handleDownloadMarkdown = () => {
        if (!analysisData) return;
        const markdownContent = generateMarkdown(analysisData as AnalysisData, STEP_TITLES, t.summaryTitle);
        downloadFile(markdownContent, 'b2b-marketing-analysis.md', 'text/markdown;charset=utf-8');
    };

    const handlePrint = () => {
        window.print();
    };

    const renderStep = (stepKey: keyof AnalysisData, title: string) => {
        const step = analysisData[stepKey] as AnalysisStep | undefined;
        if (!step) return null;

        // Allow manual addition for Offer (Step 1) and Target Groups (Step 2)
        const canAdd = ['offer', 'targetGroups'].includes(stepKey);
        const canDelete = ['offer', 'targetGroups', 'personas'].includes(stepKey);

        const handleManualAdd = () => {
            const newEmptyRow = Array(step.headers.length).fill('');
            const currentRows = step.rows || [];
            handleDataChange(stepKey, { ...step, rows: [...currentRows, newEmptyRow] });
        };
        
        return (
             <StepDisplay
                key={stepKey}
                title={title}
                summary={step.summary}
                headers={step.headers}
                rows={step.rows}
                onDataChange={(newRows) => handleDataChange(stepKey, { ...step, rows: newRows })}
                canAddRows={canAdd} 
                onEnrichRow={stepKey === 'offer' ? handleEnrichRow : handleManualAdd}
                isEnriching={isEnriching}
                canDeleteRows={canDelete}
                onRestart={() => handleStepRestart(stepKey)}
                t={t}
            />
        );
    };

    const renderContinueButton = (stepNumber: number) => {
        if (isLoading || generationStep !== stepNumber - 1) return null;

        // Industry Selector Logic for Step 6
        if (stepNumber === 6 && analysisData.targetGroups?.rows) {
             const industries = analysisData.targetGroups.rows.map(row => row[0]); // Assume Col 0 is Industry
             return (
                <div className="my-8 max-w-2xl mx-auto bg-white dark:bg-slate-800 p-6 rounded-xl shadow-sm border border-slate-200 dark:border-slate-700 print:hidden">
                    <h3 className="text-lg font-semibold text-slate-900 dark:text-white mb-4 text-center">
                        Wählen Sie eine Fokus-Branche für Schritt 6 (Botschaften):
                    </h3>
                    
                    <div className="flex justify-center mb-6">
                        <button
                            onClick={handleBatchGenerate}
                            className="flex items-center px-4 py-2 bg-slate-800 hover:bg-slate-700 text-white rounded-md text-sm font-medium transition-colors shadow-sm"
                        >
                            <SparklesIcon className="mr-2 h-4 w-4 text-yellow-400" />
                            Alle {industries.length} Branchen analysieren (Batch)
                        </button>
                    </div>

                    <div className="text-center text-xs text-slate-500 mb-2 uppercase font-semibold tracking-wider">- ODER EINZELN -</div>

                    <div className="space-y-2 mb-6 max-h-60 overflow-y-auto pr-2">
                        {industries.map((ind, idx) => (
                            <label key={idx} className={`flex items-center p-3 rounded-lg border cursor-pointer transition-all ${selectedIndustry === ind ? 'bg-sky-50 border-sky-500 ring-1 ring-sky-500 dark:bg-sky-900/20 dark:border-sky-400' : 'border-slate-200 hover:border-slate-300 dark:border-slate-700 dark:hover:border-slate-600'}`}>
                                <input
                                    type="radio"
                                    name="industry"
                                    value={ind}
                                    checked={selectedIndustry === ind}
                                    onChange={(e) => { setSelectedIndustry(e.target.value); setError(null); }}
                                    className="h-4 w-4 text-sky-600 focus:ring-sky-500 border-gray-300 dark:bg-slate-700 dark:border-slate-600"
                                />
                                <span className="ml-3 block text-sm font-medium text-slate-700 dark:text-slate-200 break-words">
                                    {ind}
                                </span>
                            </label>
                        ))}
                    </div>
                    <div className="text-center">
                        <button
                            onClick={handleGenerateNextStep}
                            disabled={!selectedIndustry}
                            className="flex items-center justify-center w-full sm:w-auto mx-auto px-6 py-3 border border-transparent text-base font-medium rounded-md shadow-sm text-white bg-green-600 hover:bg-green-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-green-500 disabled:bg-slate-400 dark:disabled:bg-slate-600 disabled:cursor-not-allowed transition-colors duration-200"
                        >
                            <SparklesIcon className="mr-2 h-5 w-5" />
                            {t.continueButton.replace('{{step}}', (stepNumber - 1).toString()).replace('{{nextStep}}', stepNumber.toString())}
                        </button>
                    </div>
                </div>
             );
        }

        return (
             <div className="my-8 text-center print:hidden">
                <button
                    onClick={handleGenerateNextStep}
                    className="flex items-center justify-center w-auto mx-auto px-6 py-3 border border-transparent text-base font-medium rounded-md shadow-sm text-white bg-green-600 hover:bg-green-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-green-500 disabled:bg-slate-400 dark:disabled:bg-slate-600 disabled:cursor-not-allowed transition-colors duration-200"
                >
                    <SparklesIcon className="mr-2 h-5 w-5" />
                    {t.continueButton.replace('{{step}}', (stepNumber - 1).toString()).replace('{{nextStep}}', stepNumber.toString())}
                </button>
             </div>
        );
    }

    return (
        <div className="min-h-screen bg-slate-50 dark:bg-slate-900 text-slate-800 dark:text-slate-200 font-sans">
            <main className="container mx-auto px-4 py-8 md:py-12">
                <header className="text-center mb-10 print:hidden relative">
                    <h1 className="text-4xl md:text-5xl font-extrabold text-slate-900 dark:text-white">
                        {t.appTitle}
                    </h1>
                    <p className="mt-4 text-lg text-slate-600 dark:text-slate-400">
                        {t.appSubtitle}
                    </p>
                    
                    <div className="mt-6 flex justify-center gap-3">
                        <label className="flex items-center px-4 py-2 bg-slate-100 dark:bg-slate-800 hover:bg-slate-200 dark:hover:bg-slate-700 text-slate-700 dark:text-slate-200 rounded-lg text-sm font-bold transition-all shadow-sm border border-slate-200 dark:border-slate-700 cursor-pointer">
                            <FolderOpen className="mr-2 h-4 w-4 text-orange-500" />
                            {inputData.language === 'de' ? 'MD Laden' : 'Load MD'}
                            <input 
                                type="file" 
                                accept=".md" 
                                onChange={handleImportMarkdown} 
                                className="hidden" 
                            />
                        </label>

                        <button 
                            onClick={() => setShowHistory(true)}
                            className="flex items-center px-4 py-2 bg-slate-100 dark:bg-slate-800 hover:bg-slate-200 dark:hover:bg-slate-700 text-slate-700 dark:text-slate-200 rounded-lg text-sm font-bold transition-all shadow-sm border border-slate-200 dark:border-slate-700"
                        >
                            <History className="mr-2 h-4 w-4 text-indigo-500" />
                            {inputData.language === 'de' ? 'Historie laden' : 'Load History'}
                        </button>
                        {generationStep > 0 && (
                            <button 
                                onClick={handleRestart}
                                className="flex items-center px-4 py-2 bg-white dark:bg-slate-800 hover:bg-slate-50 dark:hover:bg-slate-700 text-slate-600 dark:text-slate-400 rounded-lg text-sm font-medium transition-all shadow-sm border border-slate-200 dark:border-slate-700"
                            >
                                <X className="mr-2 h-4 w-4" />
                                {inputData.language === 'de' ? 'Neu starten' : 'Restart'}
                            </button>
                        )}
                    </div>
                </header>

                <div className="max-w-4xl mx-auto bg-white dark:bg-slate-800/50 rounded-2xl shadow-lg p-6 md:p-8 border border-slate-200 dark:border-slate-700 print:hidden">
                    <InputForm
                        inputData={inputData}
                        setInputData={setInputData}
                        onGenerate={handleStartGeneration}
                        isLoading={isLoading && generationStep === 0}
                        t={t}
                    />
                </div>

                {error && (
                    <div className="max-w-4xl mx-auto mt-8 bg-red-100 dark:bg-red-900/50 border border-red-400 dark:border-red-600 text-red-700 dark:text-red-200 px-4 py-3 rounded-lg print:hidden" role="alert">
                        <strong className="font-bold">{t.errorTitle} </strong>
                        <span className="block sm:inline">{error}</span>
                    </div>
                )}

                <div className="mt-12 space-y-12">
                     {isLoading && (
                        <div className="flex flex-col items-center justify-center text-center p-8">
                            <LoadingSpinner />
                            <p className="mt-4 text-lg text-slate-600 dark:text-slate-400 animate-pulse">
                                {batchStatus 
                                    ? `Analysiere Branche ${batchStatus.current} von ${batchStatus.total}: ${batchStatus.industry}...` 
                                    : t.generatingStep.replace('{{stepTitle}}', STEP_TITLES[STEP_KEYS[generationStep]])}
                            </p>
                            {batchStatus && (
                                <div className="w-64 h-2 bg-slate-200 rounded-full mt-4 overflow-hidden">
                                    <div 
                                        className="h-full bg-sky-500 transition-all duration-500 ease-out"
                                        style={{ width: `${(batchStatus.current / batchStatus.total) * 100}%` }}
                                    ></div>
                                </div>
                            )}
                        </div>
                    )}

                    {!isLoading && generationStep === 0 && !error && (
                        <div className="text-center p-8 bg-white dark:bg-slate-800/50 rounded-2xl shadow-md border border-slate-200 dark:border-slate-700 print:hidden">
                           <BotIcon className="mx-auto h-16 w-16 text-sky-500" />
                           <h3 className="mt-4 text-xl font-semibold text-slate-900 dark:text-white">{t.readyTitle}</h3>
                           <p className="mt-2 text-slate-600 dark:text-slate-400">{t.readyText}</p>
                        </div>
                    )}
                    
                    {generationStep > 0 && (
                        <>
                            {generationStep >= 6 && (
                                <div className="flex justify-end mb-8 print:hidden">
                                    <ExportMenu
                                        onDownloadMarkdown={handleDownloadMarkdown}
                                        onPrint={handlePrint}
                                        t={t}
                                    />
                                </div>
                            )}

                            {renderStep('offer', STEP_TITLES.offer)}
                            {renderContinueButton(2)}
                            {generationStep >= 2 && renderStep('targetGroups', STEP_TITLES.targetGroups)}
                            {renderContinueButton(3)}
                            {generationStep >= 3 && renderStep('personas', STEP_TITLES.personas)}
                            {renderContinueButton(4)}
                            {generationStep >= 4 && renderStep('painPoints', STEP_TITLES.painPoints)}
                            {renderContinueButton(5)}
                            {generationStep >= 5 && renderStep('gains', STEP_TITLES.gains)}
                            {renderContinueButton(6)}
                            {generationStep >= 6 && renderStep('messages', STEP_TITLES.messages)}
                            {renderContinueButton(7)}
                            {generationStep >= 7 && renderStep('customerJourney', STEP_TITLES.customerJourney)}


                            {generationStep === 7 && !isLoading && (
                                <div className="p-8 bg-sky-50 dark:bg-sky-900/20 rounded-2xl border border-sky-100 dark:border-sky-800 text-center print:hidden">
                                    <div className="inline-flex items-center justify-center w-12 h-12 rounded-full bg-sky-100 dark:bg-sky-800 mb-4">
                                        <SparklesIcon className="h-6 w-6 text-sky-600 dark:text-sky-300" />
                                    </div>
                                    <h3 className="text-xl font-bold text-slate-900 dark:text-white mb-2">
                                        {t.analysisCompleteTitle}
                                    </h3>
                                    <p className="text-slate-600 dark:text-slate-300 mb-8 max-w-2xl mx-auto">
                                        {t.analysisCompleteText.replace('{{otherLanguage}}', t.otherLanguage)}
                                    </p>
                                    
                                    <div className="flex flex-col sm:flex-row justify-center items-center gap-4 mb-6">
                                        <button
                                            onClick={handleDownloadMarkdown}
                                            className="w-full sm:w-auto flex items-center justify-center px-6 py-3 border border-transparent text-base font-medium rounded-lg text-white bg-slate-900 dark:bg-sky-600 hover:bg-slate-800 dark:hover:bg-sky-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-slate-500 shadow-md transition-all"
                                        >
                                            <MarkdownIcon className="mr-2 h-5 w-5" />
                                            {t.exportAsMarkdown}
                                        </button>
                                        <button
                                            onClick={handlePrint}
                                            className="w-full sm:w-auto flex items-center justify-center px-6 py-3 border border-slate-300 dark:border-slate-600 text-base font-medium rounded-lg text-slate-700 dark:text-slate-200 bg-white dark:bg-slate-800 hover:bg-slate-50 dark:hover:bg-slate-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-slate-500 shadow-sm transition-all"
                                        >
                                            <PrintIcon className="mr-2 h-5 w-5" />
                                            {t.exportAsPdf}
                                        </button>
                                    </div>
                                    
                                    <div className="border-t border-sky-200 dark:border-sky-700/50 pt-6 mt-2">
                                        <p className="text-sm text-slate-500 dark:text-slate-400 mb-3">Ergebnis verfeinern?</p>
                                        <button
                                            onClick={() => setGenerationStep(5)}
                                            className="text-sm text-sky-600 dark:text-sky-400 hover:text-sky-800 dark:hover:text-sky-200 font-medium underline decoration-sky-300 hover:decoration-sky-600 transition-colors"
                                        >
                                            Schritt 6 (Botschaften) mit Fokus auf eine Branche neu generieren
                                        </button>
                                    </div>
                                </div>
                            )}
                        </>
                    )}
                </div>
            </main>

            {/* History Modal */}
            {showHistory && (
                <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-slate-900/60 backdrop-blur-sm print:hidden">
                    <div className="bg-white dark:bg-slate-900 rounded-2xl shadow-2xl w-full max-w-lg overflow-hidden flex flex-col max-h-[80vh] border border-slate-200 dark:border-slate-800">
                        <div className="p-4 border-b border-slate-200 dark:border-slate-800 flex justify-between items-center bg-slate-50 dark:bg-slate-800/50">
                            <h3 className="font-bold text-slate-900 dark:text-white text-lg flex items-center gap-2">
                                <History className="text-indigo-500" size={20} />
                                {inputData.language === 'de' ? 'Projekt-Historie' : 'Project History'}
                            </h3>
                            <button onClick={() => setShowHistory(false)} className="text-slate-400 hover:text-slate-600 dark:hover:text-slate-200 p-1 transition-colors">
                                <X size={20} />
                            </button>
                        </div>
                        
                        <div className="flex-1 overflow-y-auto p-4 space-y-3">
                            {isLoadingProjects ? (
                                <div className="flex flex-col items-center justify-center p-12">
                                    <LoadingSpinner />
                                    <p className="mt-4 text-slate-500 text-sm">Lade Projekte...</p>
                                </div>
                            ) : recentProjects.length > 0 ? (
                                recentProjects.map((p) => (
                                    <button 
                                        key={p.id}
                                        onClick={() => handleProjectSelect(p.id)}
                                        className="w-full text-left p-4 rounded-xl bg-slate-50 dark:bg-slate-800/50 hover:bg-indigo-50 dark:hover:bg-indigo-900/20 border border-slate-200 dark:border-slate-800 hover:border-indigo-200 dark:hover:border-indigo-700 transition-all group relative flex items-center justify-between"
                                    >
                                        <div className="flex-1 min-w-0 pr-4">
                                            <div className="font-semibold text-slate-800 dark:text-slate-100 group-hover:text-indigo-700 dark:group-hover:text-indigo-300 truncate">{p.name}</div>
                                            <div className="flex items-center gap-2 mt-1.5 text-xs text-slate-500 dark:text-slate-400">
                                                <Clock size={12} />
                                                <span>{new Date(p.updated_at).toLocaleDateString()} {new Date(p.updated_at).toLocaleTimeString([], {hour: '2-digit', minute:'2-digit'})}</span>
                                            </div>
                                        </div>
                                        
                                        <div className="flex items-center gap-2">
                                            <span 
                                                onClick={(e) => handleDeleteProject(e, p.id)}
                                                className="p-2 text-slate-400 hover:text-red-600 dark:hover:text-red-400 hover:bg-red-50 dark:hover:bg-red-900/30 rounded-full transition-colors z-10"
                                                title="Delete Project"
                                            >
                                                <Trash2 size={18} />
                                            </span>
                                            <ArrowRight className="text-indigo-300 group-hover:text-indigo-500 transition-colors" size={20} />
                                        </div>
                                    </button>
                                ))
                            ) : (
                                <div className="text-center text-slate-400 dark:text-slate-500 py-12">
                                    <History size={48} className="mx-auto mb-4 opacity-20" />
                                    <p>{inputData.language === 'de' ? 'Keine vergangenen Projekte gefunden.' : 'No past projects found.'}</p>
                                </div>
                            )}
                        </div>
                    </div>
                </div>
            )}
        </div>
    );
};

export default App;