import { describe, expect, it } from 'vitest'

import type {
  GeneratedArtifactMetadata,
  GeneratedArtifactMetadataStore,
  ImmutableArtifactStorage,
  StoreGeneratedArtifactResult,
  WorkspaceAuthorizationRecord,
} from '..'
import {
  createGeneratedArtifact,
  downloadGeneratedArtifact,
} from './generated-artifact'

const workspaceId = '00000000-0000-4000-8000-000000000101'
const userId = '00000000-0000-4000-8000-000000000102'
const runId = '00000000-0000-4000-8000-000000000103'
const artifactId = '00000000-0000-4000-8000-000000000104'

class MemoryMetadata implements GeneratedArtifactMetadataStore {
  artifact: GeneratedArtifactMetadata | null = null

  async createIdempotently(
    artifact: GeneratedArtifactMetadata,
  ): Promise<StoreGeneratedArtifactResult> {
    if (!this.artifact) {
      this.artifact = artifact
      return { artifact, created: true }
    }
    return { artifact: this.artifact, created: false }
  }

  async findByIdInWorkspace(id: string, workspace: string) {
    return this.artifact?.id === id && this.artifact.workspaceId === workspace
      ? this.artifact
      : null
  }

  async listByRunInWorkspace(runId: string, workspace: string) {
    return this.artifact?.runId === runId &&
      this.artifact.workspaceId === workspace
      ? [this.artifact]
      : []
  }
}

class MemoryStorage implements ImmutableArtifactStorage {
  readonly bytes = new Map<string, Uint8Array>()

  async putImmutable(key: string, content: Uint8Array) {
    const created = !this.bytes.has(key)
    if (created) this.bytes.set(key, new Uint8Array(content))
    return { created }
  }

  async read(key: string) {
    const content = this.bytes.get(key)
    if (!content) throw new Error('missing')
    return new Uint8Array(content)
  }
}

function authorization(role: 'viewer' | 'editor' | 'owner') {
  return {
    async findWorkspaceAuthorization(): Promise<WorkspaceAuthorizationRecord> {
      return {
        userId,
        workspaceId,
        instanceRole: 'user',
        workspaceRole: role,
        userStatus: 'active',
      }
    },
  }
}

function request(content = new TextEncoder().encode('# Run\n')) {
  return {
    actor: { userId },
    workspaceId,
    artifactId,
    runId,
    artifactType: 'markdown' as const,
    filename: 'run.md',
    mediaType: 'text/markdown; charset=utf-8',
    content,
  }
}

describe('generated artifact use cases', () => {
  it('creates immutable bytes and metadata idempotently', async () => {
    const metadata = new MemoryMetadata()
    const storage = new MemoryStorage()
    const dependencies = {
      authorization: authorization('editor'),
      metadata,
      storage,
      now: () => new Date('2026-07-27T12:00:00.000Z'),
    }

    await expect(
      createGeneratedArtifact(dependencies, request()),
    ).resolves.toMatchObject({ created: true })
    await expect(
      createGeneratedArtifact(dependencies, request()),
    ).resolves.toMatchObject({ created: false })
    expect(metadata.artifact?.sha256).toHaveLength(64)
    expect(metadata.artifact?.sizeBytes).toBe(6n)
    expect(metadata.artifact?.storageKey).toMatch(/^[0-9a-f]{64}$/)
    expect(storage.bytes).toHaveLength(1)
  })

  it('allows a viewer to download only from the authorized workspace', async () => {
    const metadata = new MemoryMetadata()
    const storage = new MemoryStorage()
    await createGeneratedArtifact(
      {
        authorization: authorization('editor'),
        metadata,
        storage,
        now: () => new Date('2026-07-27T12:00:00.000Z'),
      },
      request(),
    )

    const download = await downloadGeneratedArtifact(
      { authorization: authorization('viewer'), metadata, storage },
      { actor: { userId }, workspaceId, artifactId },
    )
    expect(new TextDecoder().decode(download.content)).toBe('# Run\n')
    await expect(
      downloadGeneratedArtifact(
        { authorization: authorization('viewer'), metadata, storage },
        {
          actor: { userId },
          workspaceId: '00000000-0000-4000-8000-000000000999',
          artifactId,
        },
      ),
    ).rejects.toMatchObject({ code: 'workspace_access_denied' })
  })

  it('rejects unsafe filenames, viewer creation, and corrupted bytes', async () => {
    const metadata = new MemoryMetadata()
    const storage = new MemoryStorage()
    const base = {
      authorization: authorization('editor'),
      metadata,
      storage,
      now: () => new Date('2026-07-27T12:00:00.000Z'),
    }
    await expect(
      createGeneratedArtifact(base, { ...request(), filename: '../run.md' }),
    ).rejects.toMatchObject({ code: 'generated_artifact_filename_invalid' })
    await expect(
      createGeneratedArtifact(
        { ...base, authorization: authorization('viewer') },
        request(),
      ),
    ).rejects.toMatchObject({ code: 'workspace_access_denied' })

    await createGeneratedArtifact(base, request())
    const key = metadata.artifact?.storageKey
    if (!key) throw new Error('expected storage key')
    storage.bytes.set(key, new TextEncoder().encode('tampered'))
    await expect(
      downloadGeneratedArtifact(
        { authorization: authorization('viewer'), metadata, storage },
        { actor: { userId }, workspaceId, artifactId },
      ),
    ).rejects.toMatchObject({ code: 'generated_artifact_integrity_failed' })
  })
})