"""Async catalog search PoC using Quart + asyncpg.

Run:
    hypercorn async_catalog:app --bind 0.0.0.0:5002

Endpoint:
    GET /pos/api/catalog/async-search?q=filtro&limit=50&tenant_id=1

This demonstrates I/O non-blocking search using asyncpg.
"""

import os
import asyncio
import asyncpg
from quart import Quart, request, jsonify, g

app = Quart(__name__)

MASTER_DB_URL = os.environ.get('MASTER_DB_URL', 'postgresql://postgres@/nexus_autoparts')

# Shared connection pool
_pool = None

async def _get_pool():
    global _pool
    if _pool is None:
        _pool = await asyncpg.create_pool(MASTER_DB_URL, min_size=2, max_size=10)
    return _pool


@app.before_serving
async def startup():
    await _get_pool()


@app.after_serving
async def shutdown():
    global _pool
    if _pool:
        await _pool.close()
        _pool = None


@app.route('/pos/api/catalog/async-search')
async def async_search():
    q = request.args.get('q', '').strip()
    if not q or len(q) < 2:
        return jsonify({'data': []})
    limit = min(request.args.get('limit', 50, type=int), 100)

    pool = await _get_pool()
    async with pool.acquire() as conn:
        # Simple text search (PoC scope)
        clean_q = q.upper().replace(' ', '')
        rows = await conn.fetch("""
            SELECT p.id_part, p.oem_part_number, p.name_part, p.name_es,
                   p.image_url, p.group_id
            FROM parts p
            WHERE REPLACE(UPPER(p.oem_part_number), ' ', '') LIKE $1
               OR p.name_part ILIKE $2
               OR p.name_es ILIKE $2
            ORDER BY p.oem_part_number
            LIMIT $3
        """, f'%{clean_q}%', f'%{q}%', limit)

        part_ids = [r['id_part'] for r in rows]
        vehicle_map = {}
        if part_ids:
            vrows = await conn.fetch("""
                SELECT part_id, name_brand, name_model, year_car
                FROM part_vehicle_preview
                WHERE part_id = ANY($1)
            """, part_ids)
            for vr in vrows:
                vehicle_map[vr['part_id']] = f"{vr['name_brand']} {vr['name_model']} {vr['year_car']}"

    results = []
    for r in rows:
        results.append({
            'id': r['id_part'],
            'oem_part_number': r['oem_part_number'],
            'name': r['name_part'],
            'name_es': r['name_es'],
            'image_url': r['image_url'],
            'group_id': r['group_id'],
            'vehicle_info': vehicle_map.get(r['id_part'], ''),
        })

    return jsonify({'data': results})


if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5002)