import { sql } from '../../../../lib/sql.js';

/**
 * Public detail for one community-shared custom game plus its designs.
 * No auth — read-only; 404 unless the game is marked public.
 */
export default async function handler(req, res) {
  try {
    if (req.method !== 'GET') {
      return res.status(405).json({ error: 'Method not allowed' });
    }

    const gameId = parseInt(req.query.id, 10);
    if (!Number.isInteger(gameId)) {
      return res.status(400).json({ error: 'Invalid game id' });
    }

    const found = await sql`
      SELECT g.id, g.name, g.description, g.updated_at,
             COALESCE(NULLIF(u.username, ''), split_part(u.email, '@', 1)) AS author
      FROM custom_games g
      JOIN users u ON u.id = g.user_id
      WHERE g.id = ${gameId} AND g.is_public = true
    `;
    if (found.rows.length === 0) {
      return res.status(404).json({ error: 'Game not found' });
    }

    const cards = await sql`
      SELECT c.id, c.name, c.mana_cost, c.card_type, c.rarity,
             c.rules_text, c.actions, c.flavor_quote, c.power, c.toughness,
             c.frame_id, c.artwork_url, c.art_mode,
             f.id AS frame_pk, f.name AS frame_name, f.palette AS frame_palette,
             f.texture_url AS frame_texture
      FROM custom_cards c
      LEFT JOIN custom_frames f ON f.id = c.custom_frame_id
      WHERE c.custom_game_id = ${gameId}
      ORDER BY c.updated_at DESC
    `;

    const designs = cards.rows.map((row) => {
      const { frame_pk, frame_name, frame_palette, frame_texture, ...rest } = row;
      return {
        ...rest,
        custom_frame:
          frame_pk != null
            ? {
                id: frame_pk,
                name: frame_name,
                palette: frame_palette,
                texture_url: frame_texture,
              }
            : null,
      };
    });

    return res.status(200).json({ game: found.rows[0], designs });
  } catch (error) {
    console.error('Public game API error:', error);
    return res.status(500).json({ error: 'Internal server error' });
  }
}