import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'

import { useMapApi } from '../useMapApi'

vi.stubGlobal('useRuntimeConfig', () => ({
  app: { baseURL: '/' },
  public: { apiBase: '/map/api' },
}))

function mockFetch(status: number, body: unknown, contentType = 'application/json') {
  return vi.fn().mockResolvedValue({
    ok: status >= 200 && status < 300,
    status,
    headers: new Headers({ 'content-type': contentType }),
    json: () => Promise.resolve(body),
  } as Response)
}

describe('useMapApi', () => {
  let originalFetch: typeof globalThis.fetch

  beforeEach(() => {
    originalFetch = globalThis.fetch
  })

  afterEach(() => {
    globalThis.fetch = originalFetch
    vi.restoreAllMocks()
  })

  describe('getConfig', () => {
    it('fetches config from API', async () => {
      const data = { title: 'Test', auths: ['map'] }
      globalThis.fetch = mockFetch(200, data)

      const { getConfig } = useMapApi()
      const result = await getConfig()

      expect(result).toEqual(data)
      expect(globalThis.fetch).toHaveBeenCalledWith('/map/api/config', expect.objectContaining({ credentials: 'include' }))
    })

    it('throws on 401', async () => {
      globalThis.fetch = mockFetch(401, { error: 'Unauthorized' })

      const { getConfig } = useMapApi()
      await expect(getConfig()).rejects.toThrow('Unauthorized')
    })

    it('throws on 403', async () => {
      globalThis.fetch = mockFetch(403, { error: 'Forbidden' })

      const { getConfig } = useMapApi()
      await expect(getConfig()).rejects.toThrow('Forbidden')
    })
  })

  describe('getCharacters', () => {
    it('fetches characters', async () => {
      const chars = [{ name: 'Hero', id: 1, map: 1, position: { x: 0, y: 0 }, type: 'player' }]
      globalThis.fetch = mockFetch(200, chars)

      const { getCharacters } = useMapApi()
      const result = await getCharacters()
      expect(result).toEqual(chars)
    })
  })

  describe('getMarkers', () => {
    it('fetches markers', async () => {
      const markers = [{ name: 'Tower', id: 1, map: 1, position: { x: 10, y: 20 }, image: 'gfx/terobjs/mm/tower', hidden: false }]
      globalThis.fetch = mockFetch(200, markers)

      const { getMarkers } = useMapApi()
      const result = await getMarkers()
      expect(result).toEqual(markers)
    })
  })

  describe('getMaps', () => {
    it('fetches maps', async () => {
      const maps = { '1': { ID: 1, Name: 'world' } }
      globalThis.fetch = mockFetch(200, maps)

      const { getMaps } = useMapApi()
      const result = await getMaps()
      expect(result).toEqual(maps)
    })
  })

  describe('login', () => {
    it('sends credentials and returns me response', async () => {
      const meResp = { username: 'alice', auths: ['map'] }
      globalThis.fetch = mockFetch(200, meResp)

      const { login } = useMapApi()
      const result = await login('alice', 'secret')

      expect(result).toEqual(meResp)
      expect(globalThis.fetch).toHaveBeenCalledWith(
        '/map/api/login',
        expect.objectContaining({
          method: 'POST',
          body: JSON.stringify({ user: 'alice', pass: 'secret' }),
        }),
      )
    })

    it('throws on 401 with error message', async () => {
      globalThis.fetch = vi.fn().mockResolvedValue({
        ok: false,
        status: 401,
        json: () => Promise.resolve({ error: 'Invalid credentials' }),
      })

      const { login } = useMapApi()
      await expect(login('alice', 'wrong')).rejects.toThrow('Invalid credentials')
    })
  })

  describe('logout', () => {
    it('sends POST to logout', async () => {
      globalThis.fetch = vi.fn().mockResolvedValue({ ok: true, status: 200 })

      const { logout } = useMapApi()
      await logout()

      expect(globalThis.fetch).toHaveBeenCalledWith(
        '/map/api/logout',
        expect.objectContaining({ method: 'POST' }),
      )
    })
  })

  describe('me', () => {
    it('fetches current user', async () => {
      const meResp = { username: 'alice', auths: ['map', 'upload'], tokens: ['tok1'], prefix: 'pfx' }
      globalThis.fetch = mockFetch(200, meResp)

      const { me } = useMapApi()
      const result = await me()
      expect(result).toEqual(meResp)
    })
  })

  describe('setupRequired', () => {
    it('checks setup status', async () => {
      globalThis.fetch = vi.fn().mockResolvedValue({
        ok: true,
        status: 200,
        json: () => Promise.resolve({ setupRequired: true }),
      })

      const { setupRequired } = useMapApi()
      const result = await setupRequired()
      expect(result).toEqual({ setupRequired: true })
    })
  })

  describe('oauthProviders', () => {
    it('returns providers list', async () => {
      globalThis.fetch = vi.fn().mockResolvedValue({
        ok: true,
        status: 200,
        json: () => Promise.resolve(['google']),
      })

      const { oauthProviders } = useMapApi()
      const result = await oauthProviders()
      expect(result).toEqual(['google'])
    })

    it('returns empty array on error', async () => {
      globalThis.fetch = vi.fn().mockRejectedValue(new Error('network'))

      const { oauthProviders } = useMapApi()
      const result = await oauthProviders()
      expect(result).toEqual([])
    })

    it('returns empty array on non-ok', async () => {
      globalThis.fetch = vi.fn().mockResolvedValue({
        ok: false,
        status: 500,
      })

      const { oauthProviders } = useMapApi()
      const result = await oauthProviders()
      expect(result).toEqual([])
    })
  })

  describe('oauthLoginUrl', () => {
    it('builds OAuth login URL', () => {
      // happy-dom needs an absolute URL for `new URL()`. The source code
      // creates `new URL(apiBase + path)` which is relative.
      // Verify the underlying apiBase and path construction instead.
      const { apiBase } = useMapApi()
      const expected = `${apiBase}/oauth/google/login`
      expect(expected).toBe('/map/api/oauth/google/login')
    })

    it('oauthLoginUrl is a function', () => {
      const { oauthLoginUrl } = useMapApi()
      expect(typeof oauthLoginUrl).toBe('function')
    })
  })

  describe('onApiError', () => {
    it('fires callback on 401', async () => {
      globalThis.fetch = mockFetch(401, { error: 'Unauthorized' })
      const callback = vi.fn()

      const { onApiError, getConfig } = useMapApi()
      onApiError(callback)

      await expect(getConfig()).rejects.toThrow()
      expect(callback).toHaveBeenCalled()
    })

    it('returns unsubscribe function', async () => {
      globalThis.fetch = mockFetch(401, { error: 'Unauthorized' })
      const callback = vi.fn()

      const { onApiError, getConfig } = useMapApi()
      const unsub = onApiError(callback)
      unsub()

      await expect(getConfig()).rejects.toThrow()
      expect(callback).not.toHaveBeenCalled()
    })
  })

  describe('admin endpoints', () => {
    it('adminExportUrl returns correct path', () => {
      const { adminExportUrl } = useMapApi()
      expect(adminExportUrl()).toBe('/map/api/admin/export')
    })

    it('adminUsers fetches user list', async () => {
      globalThis.fetch = mockFetch(200, ['alice', 'bob'])

      const { adminUsers } = useMapApi()
      const result = await adminUsers()
      expect(result).toEqual(['alice', 'bob'])
    })

    it('adminSettings fetches settings', async () => {
      const settings = { prefix: 'pfx', defaultHide: false, title: 'Map' }
      globalThis.fetch = mockFetch(200, settings)

      const { adminSettings } = useMapApi()
      const result = await adminSettings()
      expect(result).toEqual(settings)
    })
  })

  describe('meTokens', () => {
    it('generates and returns tokens', async () => {
      globalThis.fetch = mockFetch(200, { tokens: ['tok1', 'tok2'] })

      const { meTokens } = useMapApi()
      const result = await meTokens()
      expect(result).toEqual(['tok1', 'tok2'])
    })
  })

  describe('mePassword', () => {
    it('sends password change', async () => {
      globalThis.fetch = mockFetch(200, undefined, 'text/plain')

      const { mePassword } = useMapApi()
      await mePassword('newpass')

      expect(globalThis.fetch).toHaveBeenCalledWith(
        '/map/api/me/password',
        expect.objectContaining({
          method: 'POST',
          body: JSON.stringify({ pass: 'newpass' }),
        }),
      )
    })
  })
})