/**
 * Auth Store Tests
 *
 * Tests for authentication state management, Discord OAuth, and JWT token handling.
 */

// IMPORTANT: Mock process.env BEFORE any other imports to fix Pinia
;(globalThis as any).process = {
  ...((globalThis as any).process || {}),
  env: {
    ...((globalThis as any).process?.env || {}),
    NODE_ENV: 'test',
  },
  client: true,
}

import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import { useAuthStore } from '~/store/auth'
import type { DiscordUser, Team } from '~/types'

// Mock $fetch
global.$fetch = vi.fn()

// Mock useRuntimeConfig
vi.mock('#app', () => ({
  useRuntimeConfig: vi.fn(() => ({
    public: {
      apiUrl: 'http://localhost:8000',
      discordClientId: 'test-client-id',
      discordRedirectUri: 'http://localhost:3000/auth/callback',
    },
  })),
  navigateTo: vi.fn(),
}))

describe('useAuthStore', () => {
  let mockLocalStorage: { [key: string]: string }
  let mockSessionStorage: { [key: string]: string }

  beforeEach(() => {
    // Create fresh Pinia instance for each test
    setActivePinia(createPinia())

    // Mock localStorage
    mockLocalStorage = {}
    global.localStorage = {
      getItem: vi.fn((key: string) => mockLocalStorage[key] || null),
      setItem: vi.fn((key: string, value: string) => {
        mockLocalStorage[key] = value
      }),
      removeItem: vi.fn((key: string) => {
        delete mockLocalStorage[key]
      }),
      clear: vi.fn(() => {
        mockLocalStorage = {}
      }),
      length: 0,
      key: vi.fn(),
    } as any

    // Mock sessionStorage
    mockSessionStorage = {}
    global.sessionStorage = {
      getItem: vi.fn((key: string) => mockSessionStorage[key] || null),
      setItem: vi.fn((key: string, value: string) => {
        mockSessionStorage[key] = value
      }),
      removeItem: vi.fn((key: string) => {
        delete mockSessionStorage[key]
      }),
      clear: vi.fn(() => {
        mockSessionStorage = {}
      }),
      length: 0,
      key: vi.fn(),
    } as any

    // Mock window.location
    delete (global.window as any).location
    global.window.location = { href: '' } as any

    // Mock process.client
    ;(global as any).process = { client: true }

    // Clear all mocks
    vi.clearAllMocks()
  })

  afterEach(() => {
    vi.restoreAllMocks()
  })

  describe('initialization', () => {
    it('initializes with null/empty state', () => {
      const store = useAuthStore()

      expect(store.token).toBeNull()
      expect(store.refreshToken).toBeNull()
      expect(store.user).toBeNull()
      expect(store.teams).toEqual([])
      expect(store.isLoading).toBe(false)
      expect(store.error).toBeNull()
    })

    it('has correct computed properties on init', () => {
      const store = useAuthStore()

      expect(store.isAuthenticated).toBe(false)
      expect(store.isTokenValid).toBe(false)
      expect(store.needsRefresh).toBe(false)
      expect(store.currentUser).toBeNull()
      expect(store.userTeams).toEqual([])
      expect(store.userId).toBeNull()
    })

    it('loads auth state from localStorage on init', () => {
      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      const mockTeams: Team[] = [
        {
          id: 1,
          league_id: 'sba',
          name: 'Test Team',
          abbreviation: 'TEST',
          owner_discord_id: '123',
        },
      ]

      // Pre-populate localStorage
      mockLocalStorage['auth_token'] = 'stored-token'
      mockLocalStorage['refresh_token'] = 'stored-refresh'
      mockLocalStorage['token_expires_at'] = (Date.now() + 3600000).toString()
      mockLocalStorage['user'] = JSON.stringify(mockUser)
      mockLocalStorage['teams'] = JSON.stringify(mockTeams)

      const store = useAuthStore()
      store.initializeAuth()

      expect(store.token).toBe('stored-token')
      expect(store.refreshToken).toBe('stored-refresh')
      expect(store.user).toEqual(mockUser)
      expect(store.teams).toEqual(mockTeams)
      expect(store.isAuthenticated).toBe(true)
    })
  })

  describe('authentication state management', () => {
    it('sets auth data and persists to localStorage', () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'access-token-123',
        refresh_token: 'refresh-token-456',
        expires_in: 3600,
        user: mockUser,
      })

      expect(store.token).toBe('access-token-123')
      expect(store.refreshToken).toBe('refresh-token-456')
      expect(store.user).toEqual(mockUser)
      expect(store.isAuthenticated).toBe(true)
      expect(store.error).toBeNull()

      // Verify localStorage persistence
      expect(localStorage.setItem).toHaveBeenCalledWith('auth_token', 'access-token-123')
      expect(localStorage.setItem).toHaveBeenCalledWith('refresh_token', 'refresh-token-456')
      expect(localStorage.setItem).toHaveBeenCalledWith('user', JSON.stringify(mockUser))
    })

    it('sets teams and persists to localStorage', () => {
      const store = useAuthStore()

      const mockTeams: Team[] = [
        {
          id: 1,
          league_id: 'sba',
          name: 'Team A',
          abbreviation: 'TMA',
          owner_discord_id: '123',
        },
        {
          id: 2,
          league_id: 'pd',
          name: 'Team B',
          abbreviation: 'TMB',
          owner_discord_id: '123',
        },
      ]

      store.setTeams(mockTeams)

      expect(store.teams).toEqual(mockTeams)
      expect(store.userTeams).toEqual(mockTeams)
      expect(localStorage.setItem).toHaveBeenCalledWith('teams', JSON.stringify(mockTeams))
    })

    it('clears auth data and localStorage on logout', () => {
      const store = useAuthStore()

      // Set up auth state
      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 3600,
        user: mockUser,
      })

      expect(store.isAuthenticated).toBe(true)

      // Clear auth
      store.clearAuth()

      expect(store.token).toBeNull()
      expect(store.refreshToken).toBeNull()
      expect(store.user).toBeNull()
      expect(store.teams).toEqual([])
      expect(store.error).toBeNull()
      expect(store.isAuthenticated).toBe(false)

      // Verify localStorage cleared
      expect(localStorage.removeItem).toHaveBeenCalledWith('auth_token')
      expect(localStorage.removeItem).toHaveBeenCalledWith('refresh_token')
      expect(localStorage.removeItem).toHaveBeenCalledWith('user')
      expect(localStorage.removeItem).toHaveBeenCalledWith('teams')
    })
  })

  describe('token validation', () => {
    it('computes isTokenValid correctly when token is valid', () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Token expires in 1 hour
      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 3600,
        user: mockUser,
      })

      expect(store.isTokenValid).toBe(true)
    })

    it('computes isTokenValid as false when token is expired', () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Token expires in -1 second (already expired)
      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: -1,
        user: mockUser,
      })

      expect(store.isTokenValid).toBe(false)
    })

    it('computes needsRefresh when token expires soon', () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Token expires in 4 minutes (should trigger refresh at 5 min threshold)
      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 240, // 4 minutes
        user: mockUser,
      })

      expect(store.needsRefresh).toBe(true)
    })

    it('does not need refresh when token has plenty of time', () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Token expires in 10 minutes
      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 600,
        user: mockUser,
      })

      expect(store.needsRefresh).toBe(false)
    })
  })

  describe('token refresh', () => {
    it('refreshes access token successfully', async () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Set initial auth with refresh token
      store.setAuth({
        access_token: 'old-token',
        refresh_token: 'refresh-token',
        expires_in: 3600,
        user: mockUser,
      })

      // Mock successful refresh response
      vi.mocked($fetch).mockResolvedValueOnce({
        access_token: 'new-token',
        expires_in: 3600,
      })

      const result = await store.refreshAccessToken()

      expect(result).toBe(true)
      expect(store.token).toBe('new-token')
      expect(store.refreshToken).toBe('refresh-token') // Unchanged
      expect(store.isAuthenticated).toBe(true)
      expect(localStorage.setItem).toHaveBeenCalledWith('auth_token', 'new-token')
    })

    it('clears auth on failed token refresh', async () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'old-token',
        refresh_token: 'refresh-token',
        expires_in: 3600,
        user: mockUser,
      })

      // Mock failed refresh
      vi.mocked($fetch).mockRejectedValueOnce(new Error('Refresh failed'))

      const result = await store.refreshAccessToken()

      expect(result).toBe(false)
      expect(store.token).toBeNull()
      expect(store.user).toBeNull()
      expect(store.isAuthenticated).toBe(false)
      expect(store.error).toBe('Refresh failed')
    })

    it('does not refresh if no refresh token exists', async () => {
      const store = useAuthStore()

      const result = await store.refreshAccessToken()

      expect(result).toBe(false)
      expect($fetch).not.toHaveBeenCalled()
      expect(store.isAuthenticated).toBe(false)
    })
  })

  describe('Discord OAuth flow', () => {
    it('generates OAuth URL with correct parameters', () => {
      const store = useAuthStore()

      store.loginWithDiscord()

      // Check sessionStorage for OAuth state
      expect(sessionStorage.setItem).toHaveBeenCalledWith('oauth_state', expect.any(String))

      // Check redirect URL
      expect(window.location.href).toContain('https://discord.com/api/oauth2/authorize')
      expect(window.location.href).toContain('client_id=test-client-id')
      expect(window.location.href).toContain('redirect_uri=http%3A%2F%2Flocalhost%3A3000%2Fauth%2Fcallback')
      expect(window.location.href).toContain('response_type=code')
      expect(window.location.href).toContain('scope=identify+email')
      expect(window.location.href).toContain('state=')
    })

    it('handles Discord callback successfully', async () => {
      const store = useAuthStore()

      // Set up OAuth state
      mockSessionStorage['oauth_state'] = 'test-state-123'

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      // Mock successful callback response
      vi.mocked($fetch).mockResolvedValueOnce({
        access_token: 'discord-token',
        refresh_token: 'discord-refresh',
        expires_in: 3600,
        user: mockUser,
      })

      const result = await store.handleDiscordCallback('auth-code', 'test-state-123')

      expect(result).toBe(true)
      expect(store.isAuthenticated).toBe(true)
      expect(store.user).toEqual(mockUser)
      expect(sessionStorage.removeItem).toHaveBeenCalledWith('oauth_state')
    })

    it('rejects callback with invalid state (CSRF protection)', async () => {
      const store = useAuthStore()

      // Set up different OAuth state
      mockSessionStorage['oauth_state'] = 'correct-state'

      const result = await store.handleDiscordCallback('auth-code', 'wrong-state')

      expect(result).toBe(false)
      expect(store.error).toBe('Invalid OAuth state - possible CSRF attack')
      expect($fetch).not.toHaveBeenCalled()
      expect(store.isAuthenticated).toBe(false)
    })

    it('handles Discord callback failure', async () => {
      const store = useAuthStore()

      mockSessionStorage['oauth_state'] = 'test-state'

      // Mock failed callback
      vi.mocked($fetch).mockRejectedValueOnce(new Error('OAuth failed'))

      const result = await store.handleDiscordCallback('auth-code', 'test-state')

      expect(result).toBe(false)
      expect(store.error).toBe('OAuth failed')
      expect(store.isAuthenticated).toBe(false)
    })
  })

  describe('user teams loading', () => {
    it('loads user teams from API', async () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 3600,
        user: mockUser,
      })

      const mockTeams: Team[] = [
        {
          id: 1,
          league_id: 'sba',
          name: 'Team A',
          abbreviation: 'TMA',
          owner_discord_id: '123',
        },
      ]

      vi.mocked($fetch).mockResolvedValueOnce({ teams: mockTeams })

      await store.loadUserTeams()

      expect(store.teams).toEqual(mockTeams)
      expect($fetch).toHaveBeenCalledWith(
        'http://localhost:8000/api/auth/me',
        expect.objectContaining({
          headers: {
            Authorization: 'Bearer token',
          },
        })
      )
    })

    it('does not load teams if not authenticated', async () => {
      const store = useAuthStore()

      await store.loadUserTeams()

      expect($fetch).not.toHaveBeenCalled()
      expect(store.teams).toEqual([])
    })

    it('handles teams loading failure gracefully', async () => {
      const store = useAuthStore()

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 3600,
        user: mockUser,
      })

      vi.mocked($fetch).mockRejectedValueOnce(new Error('Failed to load teams'))

      // Should not crash or set error
      await store.loadUserTeams()

      expect(store.teams).toEqual([])
      expect(store.error).toBeNull() // Teams are optional
    })
  })

  describe('logout', () => {
    it('clears auth and navigates to home', () => {
      const store = useAuthStore()
      const { navigateTo } = require('#app')

      const mockUser: DiscordUser = {
        id: '123',
        username: 'testuser',
        discriminator: '0001',
        avatar: 'avatar-url',
        email: 'test@example.com',
      }

      store.setAuth({
        access_token: 'token',
        refresh_token: 'refresh',
        expires_in: 3600,
        user: mockUser,
      })

      store.logout()

      expect(store.isAuthenticated).toBe(false)
      expect(store.token).toBeNull()
      expect(navigateTo).toHaveBeenCalledWith('/')
    })
  })
})