/**
 * Migration Script: Generate Slugs for Existing Listings
 * 
 * This script generates SEO-friendly slugs for all existing businesses
 * and commercial properties that don't have slugs yet.
 * 
 * Run with: npx ts-node scripts/migrate-slugs.ts
 */

import { Pool } from 'pg';
import { drizzle, NodePgDatabase } from 'drizzle-orm/node-postgres';
import { sql, eq, isNull } from 'drizzle-orm';
import * as schema from '../src/drizzle/schema';

// Slug generation function (copied from utils for standalone execution)
function generateSlug(title: string, location: any, id: string): string {
    if (!title || !id) return id; // Fallback to ID if no title

    const titleSlug = title
        .toLowerCase()
        .trim()
        .replace(/[^\w\s-]/g, '')
        .replace(/\s+/g, '-')
        .replace(/-+/g, '-')
        .substring(0, 50);

    let locationSlug = '';
    if (location) {
        const locationName = location.name || location.county || '';
        const state = location.state || '';

        if (locationName) {
            locationSlug = locationName
                .toLowerCase()
                .trim()
                .replace(/[^\w\s-]/g, '')
                .replace(/\s+/g, '-')
                .replace(/-+/g, '-');
        }

        if (state) {
            locationSlug = locationSlug
                ? `${locationSlug}-${state.toLowerCase()}`
                : state.toLowerCase();
        }
    }

    const shortId = id.substring(0, 8);
    const parts = [titleSlug, locationSlug, shortId].filter(Boolean);
    return parts.join('-').replace(/-+/g, '-').replace(/^-|-$/g, '').toLowerCase();
}

async function migrateBusinessSlugs(db: NodePgDatabase<typeof schema>) {
    console.log('🔄 Migrating Business Listings...');

    // Get all businesses without slugs
    const businesses = await db
        .select({
            id: schema.businesses_json.id,
            email: schema.businesses_json.email,
            data: schema.businesses_json.data,
        })
        .from(schema.businesses_json);

    let updated = 0;
    let skipped = 0;

    for (const business of businesses) {
        const data = business.data as any;

        // Skip if slug already exists
        if (data.slug) {
            skipped++;
            continue;
        }

        const slug = generateSlug(data.title || '', data.location || {}, business.id);

        // Update with new slug
        const updatedData = { ...data, slug };
        await db
            .update(schema.businesses_json)
            .set({ data: updatedData })
            .where(eq(schema.businesses_json.id, business.id));

        console.log(`  ✓ ${data.title?.substring(0, 40)}... → ${slug}`);
        updated++;
    }

    console.log(`✅ Business Listings: ${updated} updated, ${skipped} skipped (already had slugs)`);
    return updated;
}

async function migrateCommercialSlugs(db: NodePgDatabase<typeof schema>) {
    console.log('\n🔄 Migrating Commercial Properties...');

    // Get all commercial properties without slugs
    const properties = await db
        .select({
            id: schema.commercials_json.id,
            email: schema.commercials_json.email,
            data: schema.commercials_json.data,
        })
        .from(schema.commercials_json);

    let updated = 0;
    let skipped = 0;

    for (const property of properties) {
        const data = property.data as any;

        // Skip if slug already exists
        if (data.slug) {
            skipped++;
            continue;
        }

        const slug = generateSlug(data.title || '', data.location || {}, property.id);

        // Update with new slug
        const updatedData = { ...data, slug };
        await db
            .update(schema.commercials_json)
            .set({ data: updatedData })
            .where(eq(schema.commercials_json.id, property.id));

        console.log(`  ✓ ${data.title?.substring(0, 40)}... → ${slug}`);
        updated++;
    }

    console.log(`✅ Commercial Properties: ${updated} updated, ${skipped} skipped (already had slugs)`);
    return updated;
}

async function main() {
    console.log('═══════════════════════════════════════════════════════');
    console.log('         SEO SLUG MIGRATION SCRIPT');
    console.log('═══════════════════════════════════════════════════════\n');

    // Connect to database
    const connectionString = process.env.DATABASE_URL || 'postgresql://postgres:postgres@localhost:5432/bizmatch';
    console.log(`📡 Connecting to database...`);

    const pool = new Pool({ connectionString });
    const db = drizzle(pool, { schema });

    try {
        const businessCount = await migrateBusinessSlugs(db);
        const commercialCount = await migrateCommercialSlugs(db);

        console.log('\n═══════════════════════════════════════════════════════');
        console.log(`🎉 Migration complete! Total: ${businessCount + commercialCount} listings updated`);
        console.log('═══════════════════════════════════════════════════════\n');
    } catch (error) {
        console.error('❌ Migration failed:', error);
        process.exit(1);
    } finally {
        await pool.end();
    }
}

main();