import test from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import { join } from 'node:path';
import { renderOverview, validateOverview } from '../scripts/overview-render.js';
import { repoRoot } from './helpers/run-script.js';

const base = {
  schemaVersion: 1,
  source: { requirement: { repo: 'owner/repo', index: 7 } },
  requirement: {
    title: '建立需求總覽',
    summary: '把複雜需求整理成可理解的交接資料。',
    goals: ['可追蹤工作包', '可離線檢視'],
    nonGoals: [],
    diagrams: [{ kind: 'flowchart', direction: 'LR', title: '輸入流程', nodes: [{ id: 'a', label: '輸入' }, { id: 'b', label: '輸出' }], edges: [{ from: 'a', to: 'b', label: '轉換' }] }],
    formulas: [{ title: '估算', latex: 'a+b', description: '簡單公式' }],
  },
  workPackages: [{
    title: '建立抽取契約',
    type: 'implementation',
    description: '提供可重複的資料抽取。',
    scope: '只處理抽取。',
    repos: ['owner/repo'],
    depends: [],
    todos: [{ text: '建立函式', done: true }],
    acceptance: ['輸出固定'],
    issue: 'https://gitea.example/owner/repo/issues/8',
    handoff: false,
  }],
  overview: { generatedAt: '2026-09-18T00:00:00Z' },
};

test('renderer validates and renders self-contained HTML', () => {
  const html = renderOverview(base);
  assert.match(html, /<!doctype html>/i);
  assert.match(html, /<svg/);
  assert.match(html, /建立抽取契約/);
  assert.match(html, /a\+b/);
  assert.doesNotMatch(html, /mermaid/);
  assert.doesNotMatch(html, /cdn\.jsdelivr/);
});

test('renderer rejects unsupported schema versions and graph kinds', () => {
  assert.throws(() => validateOverview({ ...base, schemaVersion: 2 }), (error) => error.code === 'SCHEMA_UNSUPPORTED');
  assert.throws(() => validateOverview({ ...base, requirement: { ...base.requirement, diagrams: [{ kind: 'unknown', nodes: [], edges: [] }] } }), (error) => error.code === 'DIAGRAM_UNSUPPORTED');
});

test('renderer script is shipped and template is intentionally removed', () => {
  assert.equal(readFileSync(join(repoRoot, 'scripts', 'overview-render.js'), 'utf8').includes('overview'), true);
  assert.throws(() => readFileSync(join(repoRoot, 'templates', 'overview-artifact.html'), 'utf8'));
});