import sqlite3
import json
import os
import logging
from datetime import datetime

DB_PATH = os.environ.get('DB_PATH', 'content_engine.db')
GTM_DB_PATH = os.environ.get('GTM_DB_PATH', 'gtm_projects.db')

def get_db_connection(path=DB_PATH):
    conn = sqlite3.connect(path)
    conn.row_factory = sqlite3.Row
    return conn

def init_db():
    conn = get_db_connection()
    cursor = conn.cursor()
    
    # Projects table
    cursor.execute('''
    CREATE TABLE IF NOT EXISTS content_projects (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        name TEXT NOT NULL,
        gtm_project_id TEXT,
        category TEXT,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        gtm_data_snapshot TEXT, -- Full JSON snapshot of GTM data at import
        seo_strategy TEXT, -- JSON blob
        site_structure TEXT, -- JSON blob
        metadata TEXT -- JSON blob
    )
    ''')
    
    # Content Assets table
    cursor.execute('''
    CREATE TABLE IF NOT EXISTS content_assets (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        project_id INTEGER,
        asset_type TEXT NOT NULL, -- 'website_section', 'linkedin', 'email', 'pr'
        section_key TEXT, -- e.g., 'hero', 'features', 'faq'
        title TEXT,
        content TEXT, -- Markdown content
        status TEXT DEFAULT 'draft',
        keywords TEXT, -- JSON list of used keywords
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (project_id) REFERENCES content_projects (id) ON DELETE CASCADE
    )
    ''')
    
    conn.commit()
    conn.close()
    logging.info(f"Database initialized at {DB_PATH}")

# --- GTM READ ACCESS ---

def get_all_gtm_projects():
    """Lists all available GTM projects."""
    if not os.path.exists(GTM_DB_PATH):
        logging.warning(f"GTM DB not found at {GTM_DB_PATH}")
        return []
    
    conn = get_db_connection(GTM_DB_PATH)
    try:
        query = """
            SELECT 
                id, 
                name, 
                updated_at,
                json_extract(data, '$.phases.phase1_result.category') AS productCategory
            FROM gtm_projects 
            ORDER BY updated_at DESC
        """
        projects = [dict(row) for row in conn.execute(query).fetchall()]
        return projects
    finally:
        conn.close()

def get_gtm_project_data(gtm_id):
    """Retrieves full data for a GTM project."""
    conn = get_db_connection(GTM_DB_PATH)
    try:
        row = conn.execute("SELECT data FROM gtm_projects WHERE id = ?", (gtm_id,)).fetchone()
        return json.loads(row['data']) if row else None
    finally:
        conn.close()

# --- CONTENT ENGINE OPERATIONS ---

def import_gtm_project(gtm_id):
    """Imports a GTM project as a new Content Engine project."""
    gtm_data = get_gtm_project_data(gtm_id)
    if not gtm_data:
        return None
    
    name = gtm_data.get('name', 'Imported Project')
    # Phase 1 has the category
    phase1 = gtm_data.get('phases', {}).get('phase1_result', {})
    if isinstance(phase1, str): phase1 = json.loads(phase1)
    category = phase1.get('category', 'Unknown')
    
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute(
        "INSERT INTO content_projects (name, gtm_project_id, category, gtm_data_snapshot) VALUES (?, ?, ?, ?)",
        (name, gtm_id, category, json.dumps(gtm_data))
    )
    project_id = cursor.lastrowid
    conn.commit()
    conn.close()
    return {"id": project_id, "name": name, "category": category}

def get_all_content_projects():
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute("SELECT id, name, category, created_at, gtm_project_id FROM content_projects ORDER BY updated_at DESC")
    projects = [dict(row) for row in cursor.fetchall()]
    conn.close()
    return projects

def get_content_project(project_id):
    conn = get_db_connection()
    row = conn.execute("SELECT * FROM content_projects WHERE id = ?", (project_id,)).fetchone()
    conn.close()
    if row:
        d = dict(row)
        if d['gtm_data_snapshot']: d['gtm_data_snapshot'] = json.loads(d['gtm_data_snapshot'])
        if d['seo_strategy']: d['seo_strategy'] = json.loads(d['seo_strategy'])
        return d
    return None

def save_seo_strategy(project_id, strategy_dict):
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute(
        "UPDATE content_projects SET seo_strategy = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?",
        (json.dumps(strategy_dict), project_id)
    )
    conn.commit()
    conn.close()

def save_content_asset(project_id, asset_type, section_key, title, content, keywords=None):
    conn = get_db_connection()
    cursor = conn.cursor()
    # Check if exists (upsert logic for sections)
    cursor.execute(
        "SELECT id FROM content_assets WHERE project_id = ? AND asset_type = ? AND section_key = ?",
        (project_id, asset_type, section_key)
    )
    existing = cursor.fetchone()
    
    if existing:
        cursor.execute(
            "UPDATE content_assets SET title = ?, content = ?, keywords = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?",
            (title, content, json.dumps(keywords) if keywords else None, existing['id'])
        )
        asset_id = existing['id']
    else:
        cursor.execute(
            "INSERT INTO content_assets (project_id, asset_type, section_key, title, content, keywords) VALUES (?, ?, ?, ?, ?, ?)",
            (project_id, asset_type, section_key, title, content, json.dumps(keywords) if keywords else None)
        )
        asset_id = cursor.lastrowid
        
    conn.commit()
    conn.close()
    return asset_id

def get_project_assets(project_id):
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM content_assets WHERE project_id = ?", (project_id,))
    assets = [dict(row) for row in cursor.fetchall()]
    conn.close()
    return assets

if __name__ == "__main__":
    init_db()