const test = require('node:test')
const assert = require('node:assert/strict')
const fs = require('node:fs')
const path = require('node:path')
const Module = require('node:module')
const ts = require('typescript')
const { Solar } = require('lunar-typescript')
const cache = {}
function load(name) {
  if (cache[name]) return cache[name].exports
  const filename = path.resolve(__dirname, `../src/utils/${name}.ts`)
  const loaded = new Module(filename, module)
  cache[name] = loaded
  loaded.filename = filename
  loaded.paths = Module._nodeModulePaths(path.dirname(filename))
  const originalRequire = loaded.require.bind(loaded)
  loaded.require = (id) => id === './zodiac' ? load('zodiac') : originalRequire(id)
  loaded._compile(ts.transpileModule(fs.readFileSync(filename, 'utf8'), {
    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2017 }
  }).outputText, filename)
  return loaded.exports
}
const { getBeijingDate, getZodiacRelation, calculateWeeklyZodiacFortune: weekly } = load('zodiacWeekly')

test('合冲表对称，12生肖均覆盖1六合、2三合、1六冲、1相害', () => {
  const branches = [...'子丑寅卯辰巳午未申酉戌亥']
  for (const first of branches) {
    const counts = {}
    for (const second of branches) {
      const relation = getZodiacRelation(first, second)
      assert.equal(relation, getZodiacRelation(second, first))
      counts[relation] = (counts[relation] || 0) + 1
    }
    assert.deepEqual(counts, { 平常: 7, 六合: 1, 三合: 2, 六冲: 1, 相害: 1 })
    assert.equal(getZodiacRelation(first, first), '平常')
  }
  assert.equal(getZodiacRelation('子', '丑'), '六合')
  assert.equal(getZodiacRelation('寅', '午'), '三合')
  assert.equal(getZodiacRelation('子', '午'), '六冲')
  assert.equal(getZodiacRelation('子', '未'), '相害')
  assert.throws(() => getZodiacRelation('鼠', '子'))
})

test('北京时间零点边界、周一到周日及跨年周正确', () => {
  assert.equal(getBeijingDate(new Date('2026-10-18T15:59:59Z')), '2026-10-18')
  assert.equal(getBeijingDate(new Date('2026-10-18T16:00:00Z')), '2026-10-19')
  assert.equal(getBeijingDate(new Date('invalid')), '')
  const monday = weekly('1998-06-18', '2026-10-12')
  const sunday = weekly('1998-06-18', '2026-10-18')
  assert.deepEqual(monday, sunday)
  assert.equal(monday.weekStart, '2026-10-12')
  assert.equal(monday.weekEnd, '2026-10-18')
  assert.equal(weekly('1998-06-18', '2026-10-19').weekStart, '2026-10-19')
  const newYear = weekly('1998-06-18', '2027-01-01')
  assert.equal(newYear.weekStart, '2026-12-28')
  assert.equal(newYear.weekEnd, '2027-01-03')
})

test('逐日分值与周状态可复算，日期不遗漏、不重复，状态有差异', () => {
  const statuses = new Set()
  const date = '2026-10-15'
  for (let year = 2008; year < 2020; year++) {
    const report = weekly(`${year}-06-15`, date)
    assert.equal(report.days.length, 7)
    assert.equal(new Set(report.days.map((day) => day.date)).size, 7)
    const weights = { 六合: 2, 三合: 1, 六冲: -2, 相害: -1, 平常: 0 }
    report.days.forEach((day) => {
      const [y, m, d] = day.date.split('-').map(Number)
      assert.equal(day.branch, Solar.fromYmd(y, m, d).getLunar().getDayZhi())
      assert.equal(day.relation, getZodiacRelation(report.branch, day.branch))
      assert.equal(day.score, weights[day.relation])
    })
    assert.equal(report.score, report.days.reduce((sum, day) => sum + day.score, 0))
    assert.equal(report.status, report.score >= 2 ? '顺势' : report.score <= -2 ? '谨慎' : '平稳')
    assert.ok(report.supportiveDays.every((day) => day.score > 0))
    assert.ok(report.cautiousDays.every((day) => day.score < 0))
    statuses.add(report.status)
  }
  assert.deepEqual([...statuses].sort(), ['平稳', '谨慎', '顺势'].sort())
})

test('生日、周次驱动结果，同生肖同周稳定，跨周明细改变', () => {
  const first = weekly('1998-06-18', '2026-10-15')
  assert.deepEqual(first, weekly('1998-06-18', '2026-10-15'))
  assert.deepEqual(first, weekly('2010-06-18', '2026-10-15'))
  assert.notDeepEqual(first.days, weekly('1999-06-18', '2026-10-15').days)
  assert.notDeepEqual(first.days, weekly('1998-06-18', '2026-10-22').days)
  assert.equal(weekly('2024-02-09', '2026-10-15').zodiac, '兔')
  assert.equal(weekly('2024-02-10', '2026-10-15').zodiac, '龙')
})

test('非法生日与非法参考日期不给出虚构周运', () => {
  assert.equal(weekly('', '2026-10-15'), null)
  assert.equal(weekly('2025-02-29', '2026-10-15'), null)
  for (const date of ['', 'invalid', '2026-02-30', '2026-13-01', '2026-00-01', '2026-10-00']) {
    assert.equal(weekly('1998-06-18', date), null)
  }
})