import { BadRequestException, ForbiddenException } from '@nestjs/common';
import { beforeEach, describe, expect, it, vi } from 'vitest';
import { AssetsService } from './assets.service';
import type { PrismaService } from '../prisma/prisma.service';
import type { ProjectsService } from '../projects/projects.service';
import type { StorageService } from './storage.service';
import type { AuthRequestUser } from '../auth/auth.types';

const user: AuthRequestUser = {
  id: '1',
  email: 'user@example.com',
  role: 'user'
};

function createFile(overrides: Partial<Express.Multer.File> = {}): Express.Multer.File {
  return {
    fieldname: 'file',
    originalname: 'novel.txt',
    encoding: '7bit',
    mimetype: 'text/plain',
    size: 12,
    buffer: Buffer.from('hello novel'),
    destination: '',
    filename: '',
    path: '',
    stream: undefined as never,
    ...overrides
  };
}

describe('AssetsService', () => {
  let prisma: any;
  let storage: Pick<StorageService, 'storePrivateFile' | 'readPrivateFile'>;
  let projectsService: Pick<ProjectsService, 'assertProjectOwner'>;
  let service: AssetsService;

  beforeEach(() => {
    prisma = {
      project: {
        findUnique: vi.fn()
      },
      asset: {
        create: vi.fn(),
        findUnique: vi.fn()
      },
      renderTask: {
        findMany: vi.fn().mockResolvedValue([])
      },
      providerLog: {
        findMany: vi.fn().mockResolvedValue([])
      },
      providerConfig: {
        findUnique: vi.fn().mockResolvedValue(null)
      },
      videoClip: {
        findMany: vi.fn().mockResolvedValue([])
      }
    };
    storage = {
      storePrivateFile: vi.fn().mockResolvedValue({
        file_path: 'local://novels/test.txt',
        size: 12n,
        hash: 'hash',
        backend: 'local'
      }),
      readPrivateFile: vi.fn().mockResolvedValue(Buffer.from('video bytes'))
    };
    projectsService = {
      assertProjectOwner: vi.fn().mockResolvedValue(100n)
    };
    service = new AssetsService(
      prisma as unknown as PrismaService,
      storage as StorageService,
      projectsService as ProjectsService
    );
  });

  it('stores novel uploads as private assets', async () => {
    prisma.asset.create.mockResolvedValue({
      id: 200n,
      user_id: 1n,
      project_id: 100n,
      asset_type: 'novel_text',
      file_path: 'local://novels/test.txt',
      file_url: null,
      mime_type: 'text/plain',
      width: null,
      height: null,
      duration: null,
      size: 12n,
      hash: 'hash',
      visibility: 'private',
      status: 'active',
      created_at: new Date('2026-05-31T00:00:00.000Z')
    });

    const result = await service.uploadNovelFile(user, '100', createFile());

    expect(storage.storePrivateFile).toHaveBeenCalledWith(
      expect.objectContaining({ originalname: 'novel.txt' }),
      'novels'
    );
    expect(prisma.asset.create).toHaveBeenCalledWith({
      data: expect.objectContaining({
        asset_type: 'novel_text',
        visibility: 'private',
        file_url: null
      })
    });
    expect(result.asset.visibility).toBe('private');
    expect(result.next_step).toBe('copyright_confirm');
  });

  it('rejects unsupported novel file types', async () => {
    await expect(
      service.uploadNovelFile(
        user,
        '100',
        createFile({ originalname: 'novel.exe', mimetype: 'application/octet-stream' })
      )
    ).rejects.toBeInstanceOf(BadRequestException);
  });

  it('rejects uploads to projects owned by others', async () => {
    vi.mocked(projectsService.assertProjectOwner).mockRejectedValue(
      new ForbiddenException('Project is private')
    );

    await expect(service.uploadNovelFile(user, '100', createFile())).rejects.toBeInstanceOf(
      ForbiddenException
    );
  });

  it('returns a private file buffer for owned assets', async () => {
    prisma.asset.findUnique.mockResolvedValue({
      id: 300n,
      user_id: 1n,
      project_id: 100n,
      asset_type: 'video',
      file_path: 'local://videos/final.mp4',
      file_url: null,
      mime_type: 'video/mp4',
      width: 1080,
      height: 1920,
      duration: 4,
      size: 11n,
      hash: 'video-hash',
      visibility: 'private',
      status: 'active',
      created_at: new Date('2026-05-31T00:00:00.000Z')
    });

    const result = await service.downloadAssetForUser(user, '300');

    expect(storage.readPrivateFile).toHaveBeenCalledWith('local://videos/final.mp4');
    expect(result.asset.id).toBe('300');
    expect(result.filename).toBe('video-300.mp4');
    expect(result.buffer.toString()).toBe('video bytes');
  });

  it('returns generation provider and model for direct asset detail', async () => {
    prisma.asset.findUnique.mockResolvedValue({
      id: 300n,
      user_id: 1n,
      project_id: 100n,
      asset_type: 'video',
      file_path: 'local://videos/final.mp4',
      file_url: null,
      mime_type: 'video/mp4',
      width: 1080,
      height: 1920,
      duration: 4,
      size: 11n,
      hash: 'video-hash',
      visibility: 'private',
      status: 'active',
      created_at: new Date('2026-05-31T00:00:00.000Z')
    });
    prisma.renderTask.findMany.mockResolvedValue([
      {
        id: 20n,
        project_id: 100n,
        episode_id: 10n,
        shot_id: 8n,
        task_type: 'live_action_video_clip_generate',
        provider_id: 13n,
        status: 'success',
        input_json: {},
        input_hash: null,
        idempotency_key: null,
        output_asset_id: 300n,
        provider_request_id: 'task-external-1',
        retry_count: 0,
        max_retry: 0,
        cost_estimate: null,
        cost_actual: { toString: () => '0.35' },
        error_code: null,
        error_message: null,
        created_at: new Date('2026-05-31T00:00:00.000Z'),
        started_at: null,
        finished_at: new Date('2026-05-31T00:00:00.000Z')
      }
    ]);
    prisma.providerLog.findMany.mockResolvedValue([
      {
        id: 40n,
        provider_id: 13n,
        task_id: 20n,
        project_id: 100n,
        provider_type: 'VideoProvider',
        provider_code: 'kling-image-to-video',
        model_name: 'kling-v2-1',
        request_json: {},
        response_json: {},
        input_size: null,
        output_size: null,
        cost_estimate: null,
        cost_actual: null,
        status: 'success',
        error_code: null,
        error_message: null,
        started_at: null,
        finished_at: null,
        created_at: new Date('2026-05-31T00:00:00.000Z')
      }
    ]);
    prisma.providerConfig.findUnique.mockResolvedValue({
      id: 13n,
      provider_type: 'VideoProvider',
      provider_code: 'kling-image-to-video',
      display_name: '可灵图生视频',
      mode: 'real',
      model_name: 'kling-v2-1',
      config_json: {},
      fallback_provider_id: null,
      is_enabled: true,
      priority: 10,
      rate_limit_json: {},
      cost_rule_json: {},
      created_at: new Date('2026-05-31T00:00:00.000Z'),
      updated_at: new Date('2026-05-31T00:00:00.000Z')
    });

    const result = await service.getAssetForUser(user, '300');

    expect(result.generation).toEqual(
      expect.objectContaining({
        provider_name: '可灵图生视频',
        provider_code: 'kling-image-to-video',
        model_name: 'kling-v2-1',
        task_id: '20',
        provider_request_id: 'task-external-1'
      })
    );
  });
});