import { test } from 'node:test'
import assert from 'node:assert/strict'

import {
  CLIENT_CHANGELOG,
  newestChangelogVersion,
  selectChangelogEntries,
  type ClientChangelogEntry,
} from '../src/shared/client-changelog.ts'

const FIXTURE: ClientChangelogEntry[] = [
  { version: '4.1.0', date: '2026-09-20', items: ['新功能甲'] },
  { version: '4.0.11', date: '2026-09-13', items: ['修复乙'] },
  { version: '4.0.9', date: '2026-09-13', items: ['修复丙'] },
  { version: '4.0.4', date: '2026-09-13', items: ['修复丁'] },
]

test('更新日志：数据文件新版本在前且版本号唯一', () => {
  const versions = CLIENT_CHANGELOG.map((entry) => entry.version)
  assert.ok(versions.length > 0, '更新日志不应为空')
  assert.deepEqual(
    versions,
    [...new Set(versions)],
    '版本号不得重复（重复会让面板出现两条同名记录）',
  )
  const sorted = [...versions].sort((a, b) => {
    const pa = a.split('.').map(Number)
    const pb = b.split('.').map(Number)
    for (let i = 0; i < Math.max(pa.length, pb.length); i++) {
      const diff = (pa[i] ?? 0) - (pb[i] ?? 0)
      if (diff !== 0) return diff
    }
    return 0
  })
  assert.deepEqual(versions, sorted.reverse(), '更新日志应按版本号从新到旧排列')
})

test('更新日志：每条都有日期与面向用户的说明', () => {
  for (const entry of CLIENT_CHANGELOG) {
    assert.match(entry.version, /^\d+(\.\d+)+$/, `版本号格式异常：${entry.version}`)
    assert.match(entry.date, /^\d{4}-\d{2}-\d{2}$/, `日期格式异常：${entry.version}`)
    assert.ok(entry.items.length > 0, `缺少更新说明：${entry.version}`)
    for (const item of entry.items) {
      assert.ok(item.trim().length > 0, `更新说明为空：${entry.version}`)
      assert.ok(item.length <= 40, `更新说明过长（面板放不下，需精简）：${entry.version} -> ${item}`)
    }
  }
})

test('更新日志：最新版本号取数据文件第一条', () => {
  assert.equal(newestChangelogVersion(FIXTURE), '4.1.0')
  assert.equal(newestChangelogVersion([]), '')
})

test('更新日志：只给本机版本之后的条目，新版本在前', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.0.11', latestVersion: '4.1.0' })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.1.0'])
})

test('更新日志：落后多个版本时逐版本列出（含中间版本）', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.0.4', latestVersion: '4.1.0' })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.1.0', '4.0.11', '4.0.9'])
})

test('更新日志：已是最新版本时没有条目（面板隐藏该区块）', () => {
  assert.deepEqual(
    selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.0.11', latestVersion: '4.0.11' }),
    [],
  )
})

test('更新日志：本机版本高于线上（灰度/回滚）不列条目', () => {
  assert.deepEqual(
    selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.1.0', latestVersion: '4.0.11' }),
    [],
  )
})

test('更新日志：线上已发布但日志未收录的新版本不误报旧条目', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.1.0', latestVersion: '4.2.0' })
  assert.deepEqual(entries, [], '没有对应版本条目不倒推历史，避免把已装过的改动当成新内容')
})

test('更新日志：拿不到本机版本（旧客户端）时只给最新一条', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: '', latestVersion: '4.1.0' })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.1.0'])
})

test('更新日志：检测未完成（线上版本为空）时按数据文件最新版本兜底', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: '4.0.4', latestVersion: '' })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.1.0', '4.0.11', '4.0.9'])
})

test('更新日志：两边版本都拿不到时给数据文件最新一条', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.1.0'])
})

test('更新日志：空数据不报错', () => {
  assert.deepEqual(selectChangelogEntries({ entries: [], currentVersion: '4.0.4' }), [])
})

test('更新日志：版本号前缀 v 不影响筛选', () => {
  const entries = selectChangelogEntries({ entries: FIXTURE, currentVersion: 'v4.0.4', latestVersion: 'v4.0.11' })
  assert.deepEqual(entries.map((entry) => entry.version), ['4.0.11', '4.0.9'])
})