// Integration tests for step 10.14: Material sell prices use item-level formula.
const { describe, it, before, after } = require('node:test');
const assert = require('node:assert/strict');
const { setup, teardown, cleanup } = require('../helpers');

describe('step-10.14 material sell prices (item-level)', () => {
  let baseUrl, userSeq = 0;

  before(async () => { baseUrl = await setup(); });
  after(async () => { teardown(); cleanup(); });

  // ─── helpers ──────────────────────────────────────────────────────────

  async function registerAndLogin(username, password) {
    await fetch(`${baseUrl}/api/auth/register`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ username, password }),
    });
    const res = await fetch(`${baseUrl}/api/auth/login`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ username, password }),
    });
    assert.equal(res.status, 200);
    return res.headers.get('set-cookie') || '';
  }

  async function createHero(cookie, name, cls) {
    const res = await fetch(`${baseUrl}/api/character`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ name, class: cls }),
    });
    assert.equal(res.status, 201);
    const { data } = await res.json();
    return data.character.id;
  }

  function grantItem(characterId, itemId, quantity = 1) {
    const db = require('../../src/db').getDb();
    const NOW = 1_700_000_000_000;
    const existing = db.prepare(
      'SELECT id, quantity FROM inventory WHERE character_id = ? AND item_id = ?'
    ).get(characterId, itemId);
    if (existing) {
      db.prepare('UPDATE inventory SET quantity = quantity + ? WHERE id = ?').run(quantity, existing.id);
    } else {
      db.prepare(
        'INSERT INTO inventory (character_id, item_id, quantity, equipped_slot, acquired_at) VALUES (?, ?, ?, NULL, ?)'
      ).run(characterId, itemId, quantity, NOW);
    }
  }

  // ─── Rat Tail (common, min_level 1) — always 2g regardless of hero level ──

  it('Rat Tail sells for 2g at hero level 1', async () => {
    const cookie = await registerAndLogin(`s14a${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14A', 'warrior');
    grantItem(characterId, 17, 1); // Rat Tail

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 17, quantity: 1 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    // Character starts with 50g (DB default), sells Rat Tail → 52g
    assert.equal(body.data.character.gold, 52);
  });

  it('Rat Tail sells for 2g at hero level 10', async () => {
    const cookie = await registerAndLogin(`s14b${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14B', 'warrior');
    grantItem(characterId, 17, 1); // Rat Tail

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 17, quantity: 1 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    assert.equal(body.data.character.gold, 52);
  });

  it('Rat Tail sells for 2g at hero level 50', async () => {
    const cookie = await registerAndLogin(`s14c${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14C', 'warrior');
    grantItem(characterId, 17, 1); // Rat Tail

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 17, quantity: 1 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    assert.equal(body.data.character.gold, 52);
  });

  // ─── Drake Scale (rare, min_level 14) — always 112g regardless of hero level ──

  it('Drake Scale sells for 112g at hero level 14', async () => {
    const cookie = await registerAndLogin(`s14d${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14D', 'warrior');
    grantItem(characterId, 21, 1); // Drake Scale

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 21, quantity: 1 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    // Character starts with 50g (DB default), sells Drake Scale → 162g
    assert.equal(body.data.character.gold, 162);
  });

  it('Drake Scale sells for 112g at hero level 50', async () => {
    const cookie = await registerAndLogin(`s14e${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14E', 'warrior');
    grantItem(characterId, 21, 1); // Drake Scale

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 21, quantity: 1 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    assert.equal(body.data.character.gold, 162);
  });

  // ─── Shop-listed price equals actual payment ──────────────────────────

  it('shop-listed sellPrice equals the amount actually paid on sell', async () => {
    const cookie = await registerAndLogin(`s14f${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14F', 'warrior');
    grantItem(characterId, 17, 3); // 3 Rat Tails

    // Get shop stock to see the listed sellPrice.
    const stockRes = await fetch(`${baseUrl}/api/shop`, {
      headers: { Cookie: cookie },
    });
    const stockBody = await stockRes.json();
    assert.equal(stockRes.status, 200);
    const ratTail = stockBody.data.stock.find((i) => i.itemId === 17);
    assert.ok(ratTail, 'Rat Tail should be in stock');
    const listedPrice = ratTail.sellPrice;
    assert.equal(listedPrice, 2, 'listed sellPrice for Rat Tail should be 2');

    // Sell 1 Rat Tail.
    const sellRes = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 17, quantity: 1 }),
    });
    const sellBody = await sellRes.json();
    assert.equal(sellRes.status, 200);
    assert.equal(sellBody.ok, true);
    // Gold should increase by exactly the listed price (50 + 2 = 52).
    assert.equal(sellBody.data.character.gold, 50 + listedPrice);
  });

  // ─── Multi-quantity sell ──────────────────────────────────────────────

  it('selling 5 Rat Tails yields exactly 10g (5 × 2g)', async () => {
    const cookie = await registerAndLogin(`s14g${userSeq++}`, 'pass1234');
    const characterId = await createHero(cookie, 'S14G', 'warrior');
    grantItem(characterId, 17, 5);

    const res = await fetch(`${baseUrl}/api/shop/sell`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Cookie: cookie },
      body: JSON.stringify({ itemId: 17, quantity: 5 }),
    });
    const body = await res.json();
    assert.equal(res.status, 200);
    assert.equal(body.ok, true);
    // 50 + 5*2 = 60
    assert.equal(body.data.character.gold, 60);
  });
});