/**
 * 議題相依：把工作包之間的阻擋／先決關係建到 Gitea 原生的相依上，
 * 讓看板呈現真實的開發順序，而不是一堆平鋪的議題。
 */
import test from 'node:test';
import assert from 'node:assert/strict';
import { runScript } from './helpers/run-script.js';
import { healthyRoutes, stubEnv as envFor, withStubGitea } from './helpers/stub-gitea.js';

const REPO = 'plugins/tea-sdlc';
const INDEX = 12;

/** 預設情境：這顆議題目前沒有任何相依 */
function routes(overrides = {}) {
  return healthyRoutes(REPO, {
    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/dependencies`]: { status: 200, body: [] },
    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/blocks`]: { status: 200, body: [] },
    [`POST /api/v1/repos/${REPO}/issues/${INDEX}/dependencies`]: { status: 201, body: {} },
    [`POST /api/v1/repos/${REPO}/issues/${INDEX}/blocks`]: { status: 201, body: {} },
    ...overrides,
  });
}

const withStub = (t, overrides = {}) => withStubGitea(t, routes(overrides));

const run = (args, stub) =>
  runScript('issue-link.js', ['--repo', REPO, '--index', String(INDEX), ...args], {
    env: envFor(stub),
  });

const posts = (stub, kind) =>
  stub.requests.filter((r) => r.method === 'POST' && r.path.endsWith(`/${kind}`));

// ── 建立相依 ───────────────────────────────────────────────────────

test('--depends 建立「這顆被誰擋住」的相依', async (t) => {
  const stub = await withStub(t);

  const { code, json } = await run(['--depends', '10,11'], stub);

  assert.equal(code, 0);
  assert.equal(json.ok, true);
  assert.deepEqual(posts(stub, 'dependencies').map((r) => r.body.index), [10, 11]);
});

test('--blocks 建立「這顆擋住誰」的相依', async (t) => {
  const stub = await withStub(t);

  await run(['--blocks', '13'], stub);

  assert.deepEqual(posts(stub, 'blocks').map((r) => r.body.index), [13]);
});

test('請求帶上 owner 與 repo：Gitea 的相依端點少了它們會回 404', async (t) => {
  const stub = await withStub(t);

  await run(['--depends', '10'], stub);

  const [post] = posts(stub, 'dependencies');
  assert.deepEqual(post.body, { owner: 'plugins', repo: 'tea-sdlc', index: 10 });
});

test('兩種相依可以一次建立', async (t) => {
  const stub = await withStub(t);

  const { json } = await run(['--depends', '10', '--blocks', '13'], stub);

  assert.deepEqual(json.data.added, { depends: [10], blocks: [13] });
});

test('回傳這顆議題最後的相依狀態', async (t) => {
  const stub = await withStub(t);

  const { json } = await run(['--depends', '10'], stub);

  assert.equal(json.data.index, INDEX);
  assert.equal(json.data.repo, REPO);
});

// ── 冪等 ───────────────────────────────────────────────────────────

test('已經存在的相依不重建', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/dependencies`]: {
      status: 200,
      body: [{ number: 10 }],
    },
  });

  const { json } = await run(['--depends', '10,11'], stub);

  assert.deepEqual(posts(stub, 'dependencies').map((r) => r.body.index), [11], '只補缺的那一個');
  assert.deepEqual(json.data.added.depends, [11]);
  assert.deepEqual(json.data.skipped.depends, [10]);
});

test('全部都已存在時一個請求都不發', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/dependencies`]: {
      status: 200,
      body: [{ number: 10 }],
    },
  });

  const { code, json } = await run(['--depends', '10'], stub);

  assert.equal(code, 0);
  assert.deepEqual(posts(stub, 'dependencies'), []);
  assert.deepEqual(json.data.added.depends, []);
});

// ── 參數 ───────────────────────────────────────────────────────────

test('沒給任何相依時就不必問 Gitea', async (t) => {
  const stub = await withStub(t);

  const { code, json } = await run([], stub);

  assert.equal(code, 1);
  assert.equal(json.error.code, 'NOTHING_TO_LINK');
  assert.equal(stub.requests.length, 0);
});

test('相依編號不是正整數時擋在打 Gitea 之前', async (t) => {
  const stub = await withStub(t);

  const { json } = await run(['--depends', '10,abc'], stub);

  assert.equal(json.error.code, 'BAD_INDEX');
  assert.equal(stub.requests.length, 0);
});

test('不能把議題設成自己的先決', async (t) => {
  const stub = await withStub(t);

  const { json } = await run(['--depends', String(INDEX)], stub);

  assert.equal(json.error.code, 'SELF_DEPENDENCY');
  assert.equal(stub.requests.length, 0);
});

// ── --dry-run ─────────────────────────────────────────────────────

test('--dry-run 列出將建立的相依，且不發出任何寫入請求', async (t) => {
  const stub = await withStub(t, {
    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/dependencies`]: {
      status: 200,
      body: [{ number: 10 }],
    },
  });

  const { code, json } = await run(['--depends', '10,11', '--blocks', '13', '--dry-run'], stub);

  assert.equal(code, 0);
  assert.equal(json.data.dryRun, true);
  assert.deepEqual(
    json.data.requests.map((r) => `${r.method} ${r.path} ${r.body.index}`),
    [
      `POST /repos/${REPO}/issues/${INDEX}/dependencies 11`,
      `POST /repos/${REPO}/issues/${INDEX}/blocks 13`,
    ],
    '已存在的 10 不該出現在預覽裡',
  );
  assert.equal(stub.requests.some((r) => r.method !== 'GET'), false);
});