/**
 * 30-weather: Weather Vue 组件化测试
 *
 * 覆盖: DOM 结构（搜索框/城市列表/天气主面板）、城市管理（选择/添加/删除/持久化）、
 *   搜索建议、天气数据展示（当前温度/逐小时/7日预报）、WMO 天气码映射、
 *   模拟数据、加载状态、卸载清理
 */
import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import { h, render, nextTick } from 'vue'
import WeatherComponent from '../../src/apps/weather/Weather.vue'
import { store } from '../../src/composables/useStore'
import { setupDOM } from '../helpers'

function makeMockWin() {
  const el = document.createElement('div'); el.className = 'window'
  document.getElementById('window-layer')?.appendChild(el)
  const body = document.createElement('div'); body.className = 'win-body'
  el.appendChild(body)
  return { id: 'weather', appId: 'weather', el, body, timers: [] as any[], data: {} }
}

describe('30-weather — Weather Vue 组件化', () => {
  let win: any
  beforeEach(() => { localStorage.clear(); store.set('weather', null); setupDOM(); win = makeMockWin() })
  afterEach(() => { render(null, win.body); win.el.remove() })

  function mount() { const v = h(WeatherComponent, { win }); render(v, win.body) }

  // ==================== DOM 结构 ====================
  describe('DOM 结构', () => {
    it('搜索输入框存在', () => {
      mount()
      expect(win.body.querySelector('.weather-search')).toBeTruthy()
    })

    it('城市侧边栏存在', () => {
      mount()
      expect(win.body.querySelector('.weather-side')).toBeTruthy()
    })

    it('天气主面板存在', () => {
      mount()
      expect(win.body.querySelector('.weather-main')).toBeTruthy()
    })

    it('初始城市列表包含默认城市', () => {
      mount()
      const cities = win.body.querySelectorAll('.weather-city')
      expect(cities.length).toBeGreaterThanOrEqual(1)
    })

    it('首个城市有 sel 类（选中态）', async () => {
      mount()
      await nextTick()
      const first = win.body.querySelector('.weather-city')
      expect(first?.classList.contains('sel')).toBe(true)
    })
  })

  // ==================== 城市管理 ====================
  describe('城市管理', () => {
    it('点击城市切换选中', async () => {
      mount()
      await nextTick()
      const cities = win.body.querySelectorAll('.weather-city')
      if (cities.length >= 2) {
        (cities[1] as HTMLElement).dispatchEvent(new MouseEvent('click', { bubbles: true }))
        await nextTick()
        expect(cities[1].classList.contains('sel')).toBe(true)
      }
    })

    it('搜索添加新城市', async () => {
      mount()
      const input = win.body.querySelector('.weather-search') as HTMLInputElement
      input.value = '杭州'
      input.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      const sug = win.body.querySelector('.weather-sug')
      expect(sug).toBeTruthy()
      // 点击建议添加
      const item = win.body.querySelector('.maps-result') as HTMLElement
      if (item) {
        item.dispatchEvent(new MouseEvent('click', { bubbles: true }))
        await nextTick()
        const names = [...win.body.querySelectorAll('.weather-city b')].map((e: any) => e.textContent)
        expect(names).toContain('杭州')
      }
    })

    it('重复城市不添加', async () => {
      mount()
      await nextTick()
      const beforeCount = win.body.querySelectorAll('.weather-city').length
      const input = win.body.querySelector('.weather-search') as HTMLInputElement
      const firstCity = win.body.querySelector('.weather-city b')?.textContent || ''
      input.value = firstCity
      input.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      // 已存在的城市不应出现在建议中
      const items = win.body.querySelectorAll('.maps-result')
      const names = [...items].map((e: any) => e.textContent)
      expect(names).not.toContain(firstCity)
    })

    it('删除城市按钮存在', () => {
      mount()
      const delBtns = win.body.querySelectorAll('.weather-del')
      expect(delBtns.length).toBeGreaterThanOrEqual(1)
    })

    it('删除城市后从列表移除', async () => {
      // 先添加两个城市
      store.set('weather', { cities: ['北京', '上海'], cur: '北京', cache: {} })
      mount()
      await nextTick()
      const beforeCount = win.body.querySelectorAll('.weather-city').length
      const delBtn = win.body.querySelector('.weather-del') as HTMLElement
      delBtn.dispatchEvent(new MouseEvent('click', { bubbles: true }))
      await nextTick()
      const afterCount = win.body.querySelectorAll('.weather-city').length
      expect(afterCount).toBeLessThan(beforeCount)
    })

    it('删除当前选中城市后自动切换', async () => {
      store.set('weather', { cities: ['北京', '上海'], cur: '北京', cache: {} })
      mount()
      await nextTick()
      const delBtn = win.body.querySelector('.weather-del') as HTMLElement
      delBtn.dispatchEvent(new MouseEvent('click', { bubbles: true }))
      await nextTick()
      // 当前城市应变更为剩余城市
      const selCity = win.body.querySelector('.weather-city.sel b')
      expect(selCity).toBeTruthy()
    })
  })

  // ==================== 搜索建议 ====================
  describe('搜索建议', () => {
    it('空输入隐藏建议', () => {
      mount()
      const sug = win.body.querySelector('.weather-sug')
      expect(sug?.classList.contains('hidden')).toBe(true)
    })

    it('输入关键字显示匹配城市', async () => {
      store.set('weather', { cities: ['北京'], cur: '北京', cache: {} })
      mount()
      await nextTick(); await nextTick()  // 等待 onMounted 完成
      const input = win.body.querySelector('.weather-search') as HTMLInputElement
      input.value = '上海'
      input.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      const items = win.body.querySelectorAll('.weather-sug .maps-result')
      expect(items.length).toBeGreaterThanOrEqual(1)
      expect([...items].some(e => e.textContent?.includes('上海'))).toBe(true)
    })

    it('无匹配时建议为空', async () => {
      mount()
      const input = win.body.querySelector('.weather-search') as HTMLInputElement
      input.value = 'zzz_no_city'
      input.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      const items = win.body.querySelectorAll('.weather-sug .maps-result')
      expect(items.length).toBe(0)
    })

    it('已添加的城市不在建议中', async () => {
      mount()
      await nextTick()
      const input = win.body.querySelector('.weather-search') as HTMLInputElement
      const existingCity = win.body.querySelector('.weather-city b')?.textContent || ''
      input.value = existingCity
      input.dispatchEvent(new Event('input', { bubbles: true }))
      await nextTick()
      const items = [...win.body.querySelectorAll('.maps-result')].map(e => e.textContent)
      expect(items).not.toContain(existingCity)
    })
  })

  // ==================== 天气数据展示 ====================
  describe('天气数据展示', () => {
    // ⚠️ onMounted 立即调用 fetchCity（同步 simulate），数据瞬间就绪；
    // loading 状态仅在 fetchCity 异步场景可见，此处验证当前城市正常渲染
    it('无缓存时 onMounted 自动模拟数据，城市名称正确显示', async () => {
      store.set('weather', { cities: ['北京'], cur: '北京', cache: {} })
      mount()
      await nextTick()
      // fetchCity 同步执行 simulate，数据已就绪
      const city = win.body.querySelector('.weather-now-city')
      expect(city).toBeTruthy()
      expect(city?.textContent).toContain('北京')
    })

    it('有缓存数据显示温度', async () => {
      // 预设模拟数据
      store.set('weather', {
        cities: ['北京'],
        cur: '北京',
        cache: {
          '北京': {
            temp: 25, code: 0,
            hourly: Array.from({ length: 12 }, (_, i) => ({ t: i, temp: 23 + Math.round(Math.sin(i / 3) * 4), code: 0 })),
            daily: [
              { day: '今天', hi: 28, lo: 18, code: 0 },
              { day: '周一', hi: 30, lo: 20, code: 1 },
              { day: '周二', hi: 27, lo: 19, code: 2 },
              { day: '周三', hi: 26, lo: 17, code: 3 },
              { day: '周四', hi: 29, lo: 21, code: 61 },
              { day: '周五', hi: 31, lo: 22, code: 0 },
              { day: '周六', hi: 28, lo: 18, code: 80 },
            ],
            simulated: true,
          }
        }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-now-temp')?.textContent).toContain('25°')
    })

    it('缓存数据显示逐小时预报', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 2, hourly: Array.from({ length: 12 }, (_, i) => ({ t: i, temp: 20 + i % 5, code: i % 3 })), daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }], simulated: true } }
      })
      mount()
      await nextTick()
      const hours = win.body.querySelectorAll('.weather-hour')
      expect(hours.length).toBe(12)
    })

    it('缓存数据显示 7 日预报', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 2, hourly: Array.from({ length: 12 }, (_, i) => ({ t: i, temp: 20 + i % 5, code: 0 })), daily: Array.from({ length: 7 }, (_, i) => ({ day: ['今天', '周一', '周二', '周三', '周四', '周五', '周六'][i], hi: 25 + i, lo: 15 + i, code: i % 4 })), simulated: true } }
      })
      mount()
      await nextTick()
      const days = win.body.querySelectorAll('.weather-day')
      expect(days.length).toBe(7)
    })

    it('模拟数据显示（模拟数据）标签', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 0, hourly: [{ t: 12, temp: 22, code: 0 }], daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }], simulated: true } }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-now-city')?.textContent).toContain('模拟数据')
    })

    it('非模拟数据不显示"模拟数据"标签', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 0, hourly: [{ t: 12, temp: 22, code: 0 }], daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }] } }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-now-city')?.textContent).not.toContain('模拟数据')
    })

    it('缓存数据显示最高/最低温度', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 0, hourly: [{ t: 12, temp: 22, code: 0 }], daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }], simulated: true } }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-now-hl')?.textContent).toContain('28°')
      expect(win.body.querySelector('.weather-now-hl')?.textContent).toContain('18°')
    })

    it('天气描述文本正确映射（code: 0 = 晴）', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 25, code: 0, hourly: [{ t: 12, temp: 25, code: 0 }], daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }], simulated: true } }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-now-desc')?.textContent).toContain('晴')
    })
  })

  // ==================== 城市侧边栏显示 ====================
  describe('城市侧边栏', () => {
    it('每个城市显示名称和温度', async () => {
      store.set('weather', {
        cities: ['北京', '上海'], cur: '北京',
        cache: {
          '北京': { temp: 25, code: 0, hourly: [{ t: 12, temp: 25, code: 0 }], daily: [{ day: '今天', hi: 28, lo: 18, code: 0 }], simulated: true },
          '上海': { temp: 28, code: 1, hourly: [{ t: 12, temp: 28, code: 1 }], daily: [{ day: '今天', hi: 32, lo: 24, code: 1 }], simulated: true },
        }
      })
      mount()
      await nextTick()
      const cities = win.body.querySelectorAll('.weather-city')
      expect(cities.length).toBe(2)
      expect(cities[0].querySelector('b')?.textContent).toBe('北京')
      expect(cities[1].querySelector('b')?.textContent).toBe('上海')
      expect(cities[0].querySelector('.weather-city-temp')?.textContent).toContain('25°')
      expect(cities[1].querySelector('.weather-city-temp')?.textContent).toContain('28°')
    })

    // ⚠️ onMounted 调用 fetchCity 同步填充缓存；
    // 未预设缓存的城市会被立即模拟数据覆盖
    it('无预设缓存的城市在 onMounted 后获得模拟数据', async () => {
      store.set('weather', { cities: ['北京'], cur: '北京', cache: {} })
      mount()
      await nextTick()
      // fetchCity 同步生成模拟数据，温度不再是 …
      const temp = win.body.querySelector('.weather-city-temp')
      expect(temp).toBeTruthy()
      // 应为数字°格式
      expect(temp?.textContent).toMatch(/\d+°/)
    })

    it('城市描述文本显示（通过 WMO 映射）', async () => {
      store.set('weather', {
        cities: ['北京'], cur: '北京',
        cache: { '北京': { temp: 22, code: 61, hourly: [{ t: 12, temp: 22, code: 61 }], daily: [{ day: '今天', hi: 25, lo: 18, code: 61 }], simulated: true } }
      })
      mount()
      await nextTick()
      expect(win.body.querySelector('.weather-city small')?.textContent).toBe('小雨')
    })
  })

  // ==================== 持久化 ====================
  describe('持久化', () => {
    it('store 初始数据来自 localStorage', () => {
      localStorage.setItem('weather', JSON.stringify({ cities: ['深圳'], cur: '深圳', cache: {} }))
      mount()
      const cities = win.body.querySelectorAll('.weather-city')
      expect(cities.length).toBeGreaterThanOrEqual(1)
    })

    it('选择城市后 store 更新', async () => {
      store.set('weather', { cities: ['北京', '上海'], cur: '北京', cache: {} })
      mount()
      await nextTick()
      const cities = win.body.querySelectorAll('.weather-city')
      const sh = [...cities].find(c => c.querySelector('b')?.textContent === '上海') as HTMLElement
      if (sh) {
        sh.dispatchEvent(new MouseEvent('click', { bubbles: true }))
        await nextTick()
      }
      const data = store.get('weather', {})
      expect(data.cur).toBeTruthy()
    })
  })

  // ==================== 卸载 ====================
  describe('卸载', () => {
    it('卸载后 DOM 为空', () => {
      mount()
      render(null, win.body)
      expect(win.body.children.length).toBe(0)
    })
  })
})