import type { FastifyInstance } from 'fastify';
import { get, query } from '../db/index.js';
import { cached } from '../cache.js';

// Item/recipe data only changes when game data is re-parsed (which calls
// cacheClear()), so these can cache for a long time.
const ITEM_TTL_MS = 60 * 60 * 1000;

export async function itemRoutes(app: FastifyInstance): Promise<void> {
  app.get('/api/items/search', async (req) => {
    const { q = '' } = req.query as { q?: string };
    const queryStr = q.trim();
    if (!queryStr) return { results: [] };
    const results = await cached(`item:search:${queryStr.toLowerCase()}`, ITEM_TTL_MS, () =>
      query(
        `SELECT unique_name, name_en, tier, enchantment, shop_category, shop_subcategory
         FROM items
         WHERE name_en ILIKE ? OR unique_name ILIKE ?
         ORDER BY tier, enchantment, unique_name
         LIMIT 50`,
        [`%${queryStr}%`, `%${queryStr}%`],
      ),
    );
    return { results };
  });

  app.get('/api/items/:uniqueName', async (req, reply) => {
    const { uniqueName } = req.params as { uniqueName: string };
    const data = await cached(`item:detail:${uniqueName}`, ITEM_TTL_MS, async () => {
      const item = await get('SELECT * FROM items WHERE unique_name = ?', [uniqueName]);
      if (!item) return null;

      const recipes = (await query('SELECT * FROM recipes WHERE output_item = ? ORDER BY source, variant', [uniqueName])) as any[];
      for (const r of recipes) {
        r.inputs = await query(
          `SELECT ri.input_item, ri.count, ri.max_return_amount, i.name_en
           FROM recipe_inputs ri LEFT JOIN items i ON i.unique_name = ri.input_item
           WHERE ri.recipe_id = ?`,
          [r.id],
        );
      }

      const usedIn = await query(
        `SELECT DISTINCT r.output_item, i.name_en
         FROM recipe_inputs ri
         JOIN recipes r ON r.id = ri.recipe_id
         LEFT JOIN items i ON i.unique_name = r.output_item
         WHERE ri.input_item = ?
         LIMIT 100`,
        [uniqueName],
      );
      return { item, recipes, usedIn };
    });

    if (!data) return reply.code(404).send({ error: 'item not found' });
    return data;
  });
}