import { NextRequest, NextResponse } from 'next/server';
import { getDb } from '@/lib/db';

export const dynamic = 'force-dynamic';

export async function GET(req: NextRequest) {
    const { searchParams } = new URL(req.url);
    const q = searchParams.get('q');
    const feedId = searchParams.get('feed_id');
    const bookmarked = searchParams.get('bookmarked');
    const since = searchParams.get('since');
    const limit = parseInt(searchParams.get('limit') || '50', 10);
    const offset = parseInt(searchParams.get('offset') || '0', 10);

    const db = await getDb();

    const conditions: string[] = [];
    const params: (string | number)[] = [];

    if (q) {
        conditions.push('(i.title LIKE ? OR i.snippet LIKE ?)');
        params.push(`%${q}%`, `%${q}%`);
    }
    if (feedId) {
        conditions.push('i.feed_id = ?');
        params.push(parseInt(feedId, 10));
    }
    if (bookmarked === '1') {
        conditions.push('i.bookmarked = 1');
    }
    if (since) {
        const sinceMap: Record<string, string> = {
            '12h': '-12 hours',
            '24h': '-24 hours',
            '7d': '-7 days',
            '30d': '-30 days',
        };
        const modifier = sinceMap[since];
        if (modifier) {
            conditions.push("i.pub_date >= datetime('now', ?)");
            params.push(modifier);
        }
    }

    const where = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';

    const items = await db.all(
        `SELECT i.*, f.name as feed_name, f.url as feed_url
         FROM rss_items i
         LEFT JOIN rss_feeds f ON f.id = i.feed_id
         ${where}
         ORDER BY i.pub_date DESC
         LIMIT ? OFFSET ?`,
        ...params, limit, offset
    );

    return NextResponse.json(items);
}

export async function PATCH(req: NextRequest) {
    const body = await req.json();
    const { id, read, bookmarked } = body;

    if (!id) {
        return NextResponse.json({ error: 'Item id is required' }, { status: 400 });
    }

    const db = await getDb();
    const updates: string[] = [];
    const params: (number)[] = [];

    if (read !== undefined) {
        updates.push('read = ?');
        params.push(read ? 1 : 0);
    }
    if (bookmarked !== undefined) {
        updates.push('bookmarked = ?');
        params.push(bookmarked ? 1 : 0);
    }

    if (updates.length === 0) {
        return NextResponse.json({ error: 'Nothing to update' }, { status: 400 });
    }

    params.push(id);
    await db.run(`UPDATE rss_items SET ${updates.join(', ')} WHERE id = ?`, ...params);

    const item = await db.get('SELECT * FROM rss_items WHERE id = ?', id);
    return NextResponse.json(item);
}