/**
 * Unit tests for the action's main functionality, src/main.ts
 *
 * These should be run as if the action was called from a workflow.
 * Specifically, the inputs listed in `action.yml` should be set as environment
 * variables following the pattern `INPUT_<INPUT_NAME>`.
 */
import {
  jest,
  describe,
  expect,
  beforeEach,
  afterEach,
  it
} from '@jest/globals'
import type { RunInputs } from '../src/main.js'

// Create mock functions for core
const infoMock = jest.fn()
const warningMock = jest.fn()
const startGroupMock = jest.fn()
const endGroupMock = jest.fn()
const setOutputMock = jest.fn()
const setFailedMock = jest.fn()
const summaryWriteMock = jest.fn<() => Promise<void>>()

// Create a mock summary object
const mockSummary = {
  addHeading: jest.fn().mockReturnThis(),
  addRaw: jest.fn().mockReturnThis(),
  addTable: jest.fn().mockReturnThis(),
  addSeparator: jest.fn().mockReturnThis(),
  addLink: jest.fn().mockReturnThis(),
  addBreak: jest.fn().mockReturnThis(),
  addList: jest.fn().mockReturnThis(),
  write: summaryWriteMock.mockResolvedValue(undefined)
}

// Mock @actions/core before importing
jest.unstable_mockModule('@actions/core', () => ({
  info: infoMock,
  warning: warningMock,
  startGroup: startGroupMock,
  endGroup: endGroupMock,
  setOutput: setOutputMock,
  setFailed: setFailedMock,
  summary: mockSummary
}))

// Create mocks for OCI and attest modules
/* eslint-disable @typescript-eslint/no-explicit-any */
const getRegistryCredentialsMock = jest.fn<(...args: any[]) => any>()
const attachArtifactToImageMock = jest.fn<(...args: any[]) => any>()
const createStorageRecordMock = jest.fn<(...args: any[]) => any>()
const attestMock = jest.fn<(...args: any[]) => any>()
/* eslint-enable @typescript-eslint/no-explicit-any */

// Mock @sigstore/oci
jest.unstable_mockModule('@sigstore/oci', () => ({
  getRegistryCredentials: getRegistryCredentialsMock,
  attachArtifactToImage: attachArtifactToImageMock
}))

// Mock @actions/attest
jest.unstable_mockModule('@actions/attest', () => ({
  attest: attestMock,
  createStorageRecord: createStorageRecordMock
}))

// Create a mutable context object for @actions/github
const mockContext: Record<string, unknown> = {}

// Mock for getOctokit to return a mock octokit client
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const mockReposGet = jest.fn<(...args: any[]) => any>()
const mockOctokit = {
  rest: {
    repos: {
      get: mockReposGet
    }
  }
}

jest.unstable_mockModule('@actions/github', () => ({
  context: mockContext,
  getOctokit: jest.fn(() => mockOctokit)
}))

// Helper to set the mocked GitHub context
function setGHContext(context: object): void {
  Object.keys(mockContext).forEach(key => delete mockContext[key])
  Object.assign(mockContext, context)
}

// Now import the modules after mocking
const { mockFulcio, mockRekor, mockTSA } = await import('@sigstore/mock')
const fs = (await import('fs/promises')).default
const nock = (await import('nock')).default
const os = (await import('os')).default
const path = (await import('path')).default
const { MockAgent, setGlobalDispatcher } = await import('undici')
const { SEARCH_PUBLIC_GOOD_URL } = await import('../src/endpoints.js')
const { run } = (await import('../src/main.js')) as {
  run: (inputs: RunInputs) => Promise<void>
}

// MockAgent for mocking @actions/github
const mockAgent = new MockAgent()
setGlobalDispatcher(mockAgent)

const defaultInputs: RunInputs = {
  predicate: '',
  predicateType: '',
  predicatePath: '',
  subjectName: '',
  subjectDigest: '',
  subjectPath: '',
  subjectChecksums: '',
  pushToRegistry: false,
  createStorageRecord: true,
  showSummary: true,
  githubToken: '',
  privateSigning: false
}

describe('action', () => {
  // Capture original environment variables so we can restore them after each test
  const originalEnv = process.env

  // Mock OIDC token endpoint
  const tokenURL = 'https://token.url'

  // Fake an OIDC token
  const oidcSubject = 'foo@bar.com'
  const oidcPayload = { sub: oidcSubject, iss: '' }
  const oidcToken = `.${Buffer.from(JSON.stringify(oidcPayload)).toString(
    'base64'
  )}.}`

  const subjectName = 'ghcr.io/registry/foo/bar'
  const subjectDigest =
    'sha256:7d070f6b64d9bcc530fe99cc21eaaa4b3c364e0b2d367d7735671fa202a03b32'
  const predicate = '{}'
  const predicateType = 'https://in-toto.io/attestation/release/v0.1'

  const attestationID = '1234567890'
  const storageRecordID = 987654321

  beforeEach(() => {
    jest.clearAllMocks()

    // Set up default GitHub context with empty payload
    setGHContext({
      payload: {},
      repo: { owner: 'test-owner', repo: 'test-repo' }
    })

    // Set up default return value for attestMock (without tlogID for private/GitHub sigstore)
    attestMock.mockResolvedValue({
      attestationID,
      bundle: {
        mediaType: 'application/vnd.dev.sigstore.bundle.v0.3+json',
        verificationMaterial: {
          certificate: {
            rawBytes: Buffer.from(
              '-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----'
            ).toString('base64')
          },
          tlogEntries: []
        },
        content: {}
      },
      certificate:
        '-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----'
    })

    // Set up default return value for createStorageRecordMock (returns array of record IDs)
    createStorageRecordMock.mockResolvedValue([storageRecordID])

    nock(tokenURL)
      .get('/')
      .query({ audience: 'sigstore' })
      .reply(200, { value: oidcToken })

    const pool = mockAgent.get('https://api.github.com')
    pool
      .intercept({
        path: /^\/repos\/.*\/.*\/attestations$/,
        method: 'post'
      })
      .reply(201, { id: attestationID })

    pool
      .intercept({
        path: /^\/orgs\/.*\/artifacts\/metadata\/storage-record$/,
        method: 'post'
      })
      .reply(200, { storage_records: [{ id: storageRecordID }] })

    process.env = {
      ...originalEnv,
      ACTIONS_ID_TOKEN_REQUEST_URL: tokenURL,
      ACTIONS_ID_TOKEN_REQUEST_TOKEN: 'token',
      RUNNER_TEMP: process.env.RUNNER_TEMP || '/tmp'
    }
  })

  afterEach(() => {
    // Restore the original environment
    process.env = originalEnv

    // Clear the github context
    setGHContext({ payload: {}, repo: { owner: '', repo: '' } })
  })

  describe('when ACTIONS_ID_TOKEN_REQUEST_URL is not set', () => {
    const inputs: RunInputs = {
      ...defaultInputs,
      subjectDigest,
      subjectName,
      predicateType,
      predicate,
      githubToken: 'gh-token'
    }

    beforeEach(() => {
      // Nullify the OIDC token URL
      process.env.ACTIONS_ID_TOKEN_REQUEST_URL = ''
    })

    it('sets a failed status', async () => {
      await run(inputs)

      // run completed
      expect(setFailedMock).toHaveBeenCalledWith(
        new Error(
          'missing "id-token" permission. Please add "permissions: id-token: write" to your workflow.'
        )
      )
    })
  })

  describe('when no inputs are provided', () => {
    it('sets a failed status', async () => {
      await run(defaultInputs)

      // run completed
      expect(setFailedMock).toHaveBeenCalledWith(
        new Error(
          'One of subject-path, subject-digest, or subject-checksums must be provided'
        )
      )
    })
  })

  describe('when the repository is private', () => {
    const inputs: RunInputs = {
      ...defaultInputs,
      subjectDigest,
      subjectName,
      predicateType,
      predicate,
      githubToken: 'gh-token'
    }

    beforeEach(async () => {
      // Set the GH context with private repository visibility and a repo owner.
      setGHContext({
        payload: { repository: { visibility: 'private' } },
        repo: { owner: 'foo', repo: 'bar' }
      })

      await mockFulcio({
        baseURL: 'https://fulcio.githubapp.com',
        strict: false
      })
      await mockTSA({ baseURL: 'https://timestamp.githubapp.com' })
    })

    it('invokes the action w/o error', async () => {
      await run(inputs)

      // run completed
      expect(setFailedMock).not.toHaveBeenCalled()
      expect(infoMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching(
          `Attestation created for ${subjectName}@${subjectDigest}`
        )
      )
      expect(startGroupMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching('GitHub Sigstore')
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        2,
        expect.stringMatching('-----BEGIN CERTIFICATE-----')
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        3,
        expect.stringMatching(/attestation uploaded/i)
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        4,
        expect.stringMatching(attestationID)
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        1,
        'bundle-path',
        expect.stringMatching('attestation.json')
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        2,
        'attestation-id',
        expect.stringMatching(attestationID)
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        3,
        'attestation-url',
        expect.stringContaining(`foo/bar/attestations/${attestationID}`)
      )
      expect(setFailedMock).not.toHaveBeenCalled()
    })
  })

  describe('when the repository is public', () => {
    const inputs: RunInputs = {
      ...defaultInputs,
      subjectDigest,
      subjectName,
      predicateType,
      predicate,
      githubToken: 'gh-token',
      pushToRegistry: true
    }

    beforeEach(async () => {
      // Set the GH context with public repository visibility and a repo owner.
      setGHContext({
        payload: { repository: { visibility: 'public' } },
        repo: { owner: 'foo', repo: 'bar' }
      })

      await mockFulcio({
        baseURL: 'https://fulcio.sigstore.dev',
        strict: false
      })
      await mockRekor({ baseURL: 'https://rekor.sigstore.dev' })

      getRegistryCredentialsMock.mockImplementation(() => ({
        username: 'username',
        password: 'password'
      }))
      attachArtifactToImageMock.mockResolvedValue({
        digest: 'sha256:123456',
        mediaType: 'application/vnd.cncf.notary.v2',
        size: 123456
      })

      // Set up attestMock with tlogID for public good sigstore
      attestMock.mockResolvedValue({
        attestationID,
        bundle: {
          mediaType: 'application/vnd.dev.sigstore.bundle.v0.3+json',
          verificationMaterial: {
            certificate: {
              rawBytes: Buffer.from(
                '-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----'
              ).toString('base64')
            },
            tlogEntries: [{ logIndex: '123' }]
          },
          content: {}
        },
        certificate:
          '-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----',
        tlogID: '123'
      })

      // Mock the repos.get API call for repoOwnerIsOrg check
      mockReposGet.mockResolvedValue({
        data: { owner: { type: 'Organization' } }
      })
    })

    it('invokes the action w/o error', async () => {
      await run(inputs)

      // run completed
      expect(setFailedMock).not.toHaveBeenCalled()
      expect(getRegistryCredentialsMock).toHaveBeenCalledWith(subjectName)
      expect(attachArtifactToImageMock).toHaveBeenCalled()
      expect(attestMock).toHaveBeenCalled()
      expect(createStorageRecordMock).toHaveBeenCalled()
      expect(warningMock).not.toHaveBeenCalled()
      expect(infoMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching(
          `Attestation created for ${subjectName}@${subjectDigest}`
        )
      )
      expect(startGroupMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching('Public Good Sigstore')
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        2,
        expect.stringMatching('-----BEGIN CERTIFICATE-----')
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        3,
        expect.stringMatching(/signature uploaded/i)
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        4,
        expect.stringMatching(SEARCH_PUBLIC_GOOD_URL)
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        5,
        expect.stringMatching(/attestation uploaded/i)
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        6,
        expect.stringMatching(attestationID)
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        9,
        expect.stringMatching('Storage record created')
      )
      expect(infoMock).toHaveBeenNthCalledWith(
        10,
        expect.stringMatching('Storage record IDs: 987654321')
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        1,
        'bundle-path',
        expect.stringMatching('attestation.json')
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        2,
        'attestation-id',
        expect.stringMatching(attestationID)
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        3,
        'attestation-url',
        expect.stringContaining(`foo/bar/attestations/${attestationID}`)
      )
      expect(setOutputMock).toHaveBeenNthCalledWith(
        4,
        'storage-record-ids',
        expect.stringMatching(storageRecordID.toString())
      )
      expect(setFailedMock).not.toHaveBeenCalled()
    })

    it('catches error when storage record creation fails and continues', async () => {
      // Mock the createStorageRecord function and throw an error
      createStorageRecordMock.mockRejectedValueOnce(
        new Error('Failed to persist storage record: Not Found')
      )

      await run(inputs)

      // run completed
      expect(attestMock).toHaveBeenCalled()
      expect(createStorageRecordMock).toHaveBeenCalled()
      expect(setFailedMock).not.toHaveBeenCalled()
      expect(warningMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching('Failed to create storage record')
      )
    })

    it('does not create a storage record when the repo is owned by a user', async () => {
      // Mock the repos.get API to return a user-owned repo
      mockReposGet.mockResolvedValueOnce({ data: { owner: { type: 'User' } } })

      await run(inputs)

      // run completed
      expect(setFailedMock).not.toHaveBeenCalled()
      expect(getRegistryCredentialsMock).toHaveBeenCalledWith(subjectName)
      expect(attachArtifactToImageMock).toHaveBeenCalled()
      expect(attestMock).toHaveBeenCalled()
      expect(createStorageRecordMock).not.toHaveBeenCalled()
      expect(warningMock).not.toHaveBeenCalled()
      expect(infoMock).toHaveBeenCalledWith(
        expect.stringMatching(
          `Attestation created for ${subjectName}@${subjectDigest}`
        )
      )
      expect(infoMock).not.toHaveBeenCalledWith(
        expect.stringMatching('Storage record created')
      )
      expect(infoMock).not.toHaveBeenCalledWith(
        expect.stringMatching('Storage record IDs: 987654321')
      )
      expect(setOutputMock).toHaveBeenCalledWith(
        'attestation-id',
        expect.stringMatching(attestationID)
      )
      expect(setOutputMock).not.toHaveBeenCalledWith(
        'storage-record-ids',
        expect.stringMatching(storageRecordID.toString())
      )
      expect(setFailedMock).not.toHaveBeenCalled()
    })
  })

  describe('when the subject count is greater than 1', () => {
    let dir = ''
    const filename = 'subject'

    beforeEach(async () => {
      const subjectCount = 5
      const content = 'file content'

      // Set-up temp directory
      const tmpDir = await fs.realpath(os.tmpdir())
      dir = await fs.mkdtemp(tmpDir + path.sep)

      // Add files for glob testing
      for (let i = 0; i < subjectCount; i++) {
        await fs.writeFile(path.join(dir, `${filename}-${i}`), content)
      }

      // Set the GH context with private repository visibility and a repo owner.
      setGHContext({
        payload: { repository: { visibility: 'private' } },
        repo: { owner: 'foo', repo: 'bar' }
      })

      // Set-up a Fulcio mock for each subject
      await mockFulcio({
        baseURL: 'https://fulcio.githubapp.com',
        strict: false
      })

      // Set-up a TSA mock for each subject
      await mockTSA({ baseURL: 'https://timestamp.githubapp.com' })
    })

    afterEach(async () => {
      // Clean-up temp directory
      await fs.rm(dir, { recursive: true })
    })

    it('invokes the action w/o error', async () => {
      const inputs: RunInputs = {
        ...defaultInputs,
        subjectPath: path.join(dir, `${filename}-*`),
        predicateType,
        predicate,
        githubToken: 'gh-token'
      }
      await run(inputs)

      // run completed
      expect(setFailedMock).not.toHaveBeenCalled()
      expect(infoMock).toHaveBeenNthCalledWith(
        1,
        expect.stringMatching('Attestation created for 5 subjects')
      )
    })
  })

  describe('when the subject count exceeds the max', () => {
    let dir = ''
    const filename = 'subject'

    beforeEach(async () => {
      const subjectCount = 1025
      const content = 'file content'

      // Set-up temp directory
      const tmpDir = await fs.realpath(os.tmpdir())
      dir = await fs.mkdtemp(tmpDir + path.sep)

      // Add files for glob testing
      for (let i = 0; i < subjectCount; i++) {
        await fs.writeFile(path.join(dir, `${filename}-${i}`), content)
      }

      // Set the GH context with private repository visibility and a repo owner.
      setGHContext({
        payload: { repository: { visibility: 'private' } },
        repo: { owner: 'foo', repo: 'bar' }
      })
    })

    afterEach(async () => {
      // Clean-up temp directory
      await fs.rm(dir, { recursive: true })
    })

    it('sets a failed status', async () => {
      const inputs: RunInputs = {
        ...defaultInputs,
        subjectPath: path.join(dir, `${filename}-*`),
        predicateType,
        predicate,
        githubToken: 'gh-token'
      }
      await run(inputs)

      // run completed
      expect(setFailedMock).toHaveBeenCalledWith(
        new Error(
          'Too many subjects specified. The maximum number of subjects is 1024.'
        )
      )
    })
  })
})