import { setActivePinia, createPinia } from 'pinia'
import { beforeEach, describe, it, expect, vi } from 'vitest'
import { useThemeStore } from '../../stores/theme'

describe('theme store', () => {
  let store

  beforeEach(() => {
    setActivePinia(createPinia())
    store = useThemeStore()
  })

  // ── init() ──────────────────────────────────────────────────────

  describe('init()', () => {
    it('loads saved theme from storage', () => {
      uni.__mockStorage.theme = 'light'
      store.init()
      expect(store.theme).toBe('light')
    })

    it('defaults to dark when no saved theme and no system preference', () => {
      // mockStorage is already empty (beforeEach cleanup)
      // getSystemInfoSync returns { theme: 'dark' } so "sysInfo.theme === 'light'" is false
      store.init()
      expect(store.theme).toBe('dark')
    })

    it('falls back to dark when getSystemInfoSync throws', () => {
      uni.getSystemInfoSync.mockImplementation(() => { throw new Error('no sys') })
      store.init()
      expect(store.theme).toBe('dark')
    })

    it('follows system light preference when no saved theme', () => {
      uni.getSystemInfoSync.mockReturnValue({ theme: 'light' })
      store.init()
      expect(store.theme).toBe('light')
    })

    it('calls setTabBarStyle with correct colors on init', () => {
      uni.__mockStorage.theme = 'light'
      store.init()
      expect(uni.setTabBarStyle).toHaveBeenCalledWith({
        color: '#4A5568',
        selectedColor: '#C9A84C',
        backgroundColor: '#FFFFFF',
        borderStyle: 'black',
      })
    })
  })

  // ── toggle() ────────────────────────────────────────────────────

  describe('toggle()', () => {
    it('switches from dark to light', () => {
      store.theme = 'dark'
      store.toggle()
      expect(store.theme).toBe('light')
    })

    it('switches from light to dark', () => {
      store.theme = 'light'
      store.toggle()
      expect(store.theme).toBe('dark')
    })

    it('persists toggled theme to storage', () => {
      store.theme = 'dark'
      store.toggle()
      expect(uni.setStorageSync).toHaveBeenCalledWith('theme', 'light')
    })

    it('updates tab bar on toggle', () => {
      store.theme = 'dark'
      store.toggle()
      expect(uni.setTabBarStyle).toHaveBeenCalled()
    })
  })

  // ── setTheme() ──────────────────────────────────────────────────

  describe('setTheme()', () => {
    it('sets theme to light and persists', () => {
      store.setTheme('light')
      expect(store.theme).toBe('light')
      expect(uni.setStorageSync).toHaveBeenCalledWith('theme', 'light')
      expect(uni.setTabBarStyle).toHaveBeenCalledWith({
        color: '#4A5568',
        selectedColor: '#C9A84C',
        backgroundColor: '#FFFFFF',
        borderStyle: 'black',
      })
    })

    it('sets theme to dark and persists', () => {
      store.theme = 'light'
      store.setTheme('dark')
      expect(store.theme).toBe('dark')
      expect(uni.setStorageSync).toHaveBeenCalledWith('theme', 'dark')
      expect(uni.setTabBarStyle).toHaveBeenCalledWith({
        color: '#A0AEC0',
        selectedColor: '#C9A84C',
        backgroundColor: '#1E3A5F',
        borderStyle: 'white',
      })
    })

    it('ignores invalid theme values', () => {
      store.setTheme('invalid')
      expect(store.theme).toBe('dark') // default
      expect(uni.setStorageSync).not.toHaveBeenCalled()
    })

    it('ignores empty string', () => {
      store.setTheme('')
      expect(store.theme).toBe('dark')
      expect(uni.setStorageSync).not.toHaveBeenCalled()
    })
  })
})