import { AnalysisResult, LeadStatus, SearchStrategy, Tier, SearchSignal } from "../types";

export const parseMarkdownReport = (md: string): { strategy: SearchStrategy; results: AnalysisResult[] } | null => {
  try {
    const lines = md.split('\n');
    
    // 1. Extract Product Context from H1
    const h1Line = lines.find(l => l.startsWith('# Market Intelligence Report:'));
    const productContext = h1Line ? h1Line.replace('# Market Intelligence Report:', '').trim() : "Imported Analysis";

    // 2. Extract ICP from Context line
    const icpLine = lines.find(l => l.includes('**Context:**'));
    const idealCustomerProfile = icpLine ? icpLine.replace('**Context:**', '').replace(/\*/g, '').trim() : "";

    // 3. Find Table and Headers
    const tableStartIndex = lines.findIndex(l => l.trim().startsWith('|') && l.includes('Company'));
    if (tableStartIndex === -1) return null;

    const headerLine = lines[tableStartIndex];
    const headers = headerLine.split('|').map(h => h.trim()).filter(h => h !== '');
    
    // Identify dynamic signal columns (everything between 'Status' and 'Recommendation')
    const statusIdx = headers.indexOf('Status');
    const recIdx = headers.indexOf('Recommendation');
    
    const signalNames = headers.slice(statusIdx + 1, recIdx);
    const signals: SearchSignal[] = signalNames.map((name, i) => ({
      id: `sig_${i + 1}`,
      name,
      description: `Imported signal: ${name}`,
      targetPageKeywords: []
    }));

    const strategy: SearchStrategy = {
      productContext,
      idealCustomerProfile,
      signals
    };

    // 4. Parse Rows
    const results: AnalysisResult[] = [];
    // Start after header and separator line
    for (let i = tableStartIndex + 2; i < lines.length; i++) {
      const line = lines[i].trim();
      if (!line.startsWith('|')) continue;
      
      const cells = line.split('|').map(c => c.trim()).filter(c => c !== '');
      if (cells.length < headers.length) continue;

      const [name, prio, revEmp, statusCell] = cells;
      const [rev, emp] = revEmp.split('/').map(s => s.trim());

      // Reconstruct dynamic Analysis
      const dynamicAnalysis: Record<string, any> = {};
      signalNames.forEach((sigName, idx) => {
        const sigId = signals[idx].id;
        dynamicAnalysis[sigId] = {
          value: cells[statusIdx + 1 + idx],
          proof: "Imported from file",
          sentiment: "Neutral"
        };
      });

      results.push({
        companyName: name,
        tier: (prio as Tier) || Tier.TIER_3,
        revenue: rev || "?",
        employees: emp || "?",
        status: (statusCell as LeadStatus) || LeadStatus.UNKNOWN,
        dataSource: "Imported File",
        recommendation: cells[recIdx] || "",
        dynamicAnalysis,
        processingChecks: { wiki: true, revenue: true, signalsChecked: true }
      });
    }

    return { strategy, results };
  } catch (e) {
    console.error("Failed to parse markdown", e);
    return null;
  }
};