import { afterEach, describe, expect, it, vi } from 'vitest'
import {
  deleteGroup,
  deleteUser,
  fetchGroups,
  fetchHealth,
  fetchNetwork,
  fetchSecurity,
  fetchStatus,
  fetchUsers,
  getApiBaseUrl,
  saveNetwork,
  saveSecurity,
  upsertGroup,
} from './client'

describe('getApiBaseUrl', () => {
  it('defaults to localhost:8080 when unset', () => {
    expect(getApiBaseUrl()).toBe('http://localhost:8080')
  })

  it('keeps an empty string for same-origin requests', async () => {
    vi.resetModules()
    vi.stubEnv('VITE_API_BASE_URL', '')
    const clientModule = await import('./client')
    expect(clientModule.getApiBaseUrl()).toBe('')
    vi.unstubAllEnvs()
    vi.resetModules()
  })
})

describe('fetchHealth', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed health payload', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ status: 'ok' }),
    })

    const health = await fetchHealth(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/health',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(health).toEqual({ status: 'ok' })
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 503,
      json: async () => ({}),
    })

    await expect(fetchHealth(fetchMock)).rejects.toThrow(
      'health check failed: 503',
    )
  })
})

describe('fetchStatus', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed status payload', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ service: 'clustercanvas', version: '0.1.0' }),
    })

    const status = await fetchStatus(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/status',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(status).toEqual({ service: 'clustercanvas', version: '0.1.0' })
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 503,
      json: async () => ({}),
    })

    await expect(fetchStatus(fetchMock)).rejects.toThrow(
      'status check failed: 503',
    )
  })
})

describe('fetchGroups', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed groups payload', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({
        groups: [
          {
            name: 'Admins',
            scope_kind: 'node',
            scope_name: 'node-1',
            permissions: ['nodes.read'],
          },
        ],
      }),
    })

    const payload = await fetchGroups(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/groups',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(payload.groups).toEqual([
      {
        name: 'Admins',
        scope_kind: 'node',
        scope_name: 'node-1',
        permissions: ['nodes.read'],
      },
    ])
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 503,
      json: async () => ({}),
    })

    await expect(fetchGroups(fetchMock)).rejects.toThrow(
      'groups fetch failed: 503',
    )
  })
})

describe('upsertGroup', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('sends JSON body and returns parsed groups', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ groups: [] }),
    })

    await upsertGroup(
      {
        name: 'Admins',
        scope_kind: 'node',
        scope_name: 'node-1',
        permissions: ['nodes.read'],
      },
      fetchMock,
    )

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/groups',
      expect.objectContaining({
        method: 'POST',
        credentials: 'include',
        body: JSON.stringify({
          group: {
            name: 'Admins',
            scope_kind: 'node',
            scope_name: 'node-1',
            permissions: ['nodes.read'],
          },
        }),
      }),
    )
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 400,
      json: async () => ({}),
    })

    await expect(
      upsertGroup(
        {
          name: 'Admins',
          scope_kind: 'node',
          scope_name: 'node-1',
          permissions: ['nodes.read'],
        },
        fetchMock,
      ),
    ).rejects.toThrow('groups upsert failed: 400')
  })
})

describe('deleteGroup', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('sends DELETE and returns parsed groups', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ groups: [] }),
    })

    await deleteGroup('Admins', fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/groups?name=Admins',
      expect.objectContaining({ method: 'DELETE', credentials: 'include' }),
    )
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 404,
      json: async () => ({}),
    })

    await expect(deleteGroup('Admins', fetchMock)).rejects.toThrow(
      'request failed: 404',
    )
  })

  it('surfaces API error messages', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 409,
      json: async () => ({
        error: 'Administrators group cannot be deleted',
      }),
    })

    await expect(deleteGroup('Administrators', fetchMock)).rejects.toThrow(
      'Administrators group cannot be deleted',
    )
  })
})

describe('fetchUsers', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed users payload', async () => {
    const users = [
      {
        id: 'u1',
        username: 'Admin',
        enabled: true,
        totp_confirmed: false,
        group_names: ['Administrators'],
        created_at: '2026-01-01T00:00:00Z',
        password_changed_at: '2026-01-01T00:00:00Z',
        is_admin: true,
        can_delete: false,
      },
    ]
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ users }),
    })

    const payload = await fetchUsers(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/users',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(payload.users).toEqual(users)
  })
})

describe('deleteUser', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('sends DELETE by id with reauth credentials and returns users', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ users: [] }),
    })

    await deleteUser(
      'u2',
      { current_password: 'correct horse battery staple extra' },
      fetchMock,
    )

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/users?id=u2',
      expect.objectContaining({
        method: 'DELETE',
        credentials: 'include',
        body: JSON.stringify({
          current_password: 'correct horse battery staple extra',
          totp_code: '',
        }),
      }),
    )
  })

  it('surfaces last-admin errors', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 409,
      json: async () => ({ error: 'cannot delete the last administrator' }),
    })

    await expect(
      deleteUser('u1', { current_password: 'x' }, fetchMock),
    ).rejects.toThrow('cannot delete the last administrator')
  })
})

describe('fetchSecurity', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed security payload', async () => {
    const security = {
      idle_timeout_minutes: 30,
      session_lifetime_hours: 24,
      reauth_sensitive_actions: false,
      reauth_grace_minutes: 15,
      totp_enabled: false,
    }
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ security }),
    })

    const payload = await fetchSecurity(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/security',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(payload.security).toEqual(security)
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 503,
      json: async () => ({}),
    })

    await expect(fetchSecurity(fetchMock)).rejects.toThrow(
      'security fetch failed: 503',
    )
  })
})

describe('saveSecurity', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('sends JSON body and returns parsed security', async () => {
    const security = {
      idle_timeout_minutes: 45,
      session_lifetime_hours: 12,
      reauth_sensitive_actions: true,
      reauth_grace_minutes: 0,
      totp_enabled: true,
    }
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ security }),
    })

    await saveSecurity(security, fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/security',
      expect.objectContaining({
        method: 'PUT',
        credentials: 'include',
        body: JSON.stringify({ security }),
      }),
    )
  })

  it('throws when the response is not ok', async () => {
    const fetchMock = vi.fn().mockResolvedValue({
      ok: false,
      status: 400,
      json: async () => ({}),
    })

    await expect(
      saveSecurity(
        {
          idle_timeout_minutes: 0,
          session_lifetime_hours: 24,
          reauth_sensitive_actions: false,
          reauth_grace_minutes: 15,
          totp_enabled: false,
        },
        fetchMock,
      ),
    ).rejects.toThrow('security save failed: 400')
  })
})

describe('fetchNetwork', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('returns parsed network payload', async () => {
    const network = {
      listen_address: '0.0.0.0',
      public_hostname: '',
      access_mode: 'open' as const,
      rules: [],
    }
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ network }),
    })

    const payload = await fetchNetwork(fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/network',
      expect.objectContaining({ credentials: 'include' }),
    )
    expect(payload.network).toEqual(network)
  })
})

describe('saveNetwork', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('sends JSON body and returns parsed network', async () => {
    const network = {
      listen_address: '127.0.0.1',
      public_hostname: 'admin.example.com',
      access_mode: 'whitelist' as const,
      rules: ['10.0.0.0/8'],
    }
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ network }),
    })

    await saveNetwork(network, fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/network',
      expect.objectContaining({
        method: 'PUT',
        credentials: 'include',
        body: JSON.stringify({ network }),
      }),
    )
  })
})

describe('nodes API', () => {
  afterEach(() => {
    vi.restoreAllMocks()
  })

  it('fetches nodes filtered by kind', async () => {
    const { fetchNodes } = await import('./client')
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ nodes: [] }),
    })

    await fetchNodes('container', fetchMock)

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/nodes?kind=container',
      expect.objectContaining({ credentials: 'include' }),
    )
  })

  it('creates a node with generate options', async () => {
    const { createNode } = await import('./client')
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({
        node: {
          id: '11111111-2222-4333-8444-555555555555',
          kind: 'container',
          name: 'ct1',
          host_ip: '10.0.0.1',
          username: 'clustercanvas',
          group_name: 'Administrators',
          public_key: 'ssh-ed25519 AAAA',
          key_algo: 'ed25519',
          created_at: '2026-01-01T00:00:00.000Z',
        },
      }),
    })

    await createNode(
      {
        kind: 'container',
        name: 'ct1',
        host_ip: '10.0.0.1',
        username: 'clustercanvas',
        group_name: 'Administrators',
        generate: { algorithm: 'ed25519', kdf_rounds: 100 },
      },
      fetchMock,
    )

    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/nodes',
      expect.objectContaining({
        method: 'POST',
        credentials: 'include',
      }),
    )
  })

  it('posts to the SSH test endpoint', async () => {
    const { testNodeSSH } = await import('./client')
    const fetchMock = vi.fn().mockResolvedValue({
      ok: true,
      json: async () => ({ ok: false, message: 'connection refused' }),
    })

    const result = await testNodeSSH(
      '11111111-2222-4333-8444-555555555555',
      fetchMock,
    )

    expect(result).toEqual({ ok: false, message: 'connection refused' })
    expect(fetchMock).toHaveBeenCalledWith(
      'http://localhost:8080/api/v1/nodes/11111111-2222-4333-8444-555555555555/test-ssh',
      expect.objectContaining({
        method: 'POST',
        credentials: 'include',
      }),
    )
  })
})