import { existsSync, mkdtempSync, readFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { afterEach, describe, expect, it } from 'vitest';
import {
  getLocalImageWorkspaceDirectory,
  isLocalImageWorkspaceDevelopmentEnabled,
  LocalImageWorkspace,
  LocalImageWorkspaceError,
} from '@electron/image-workspace/local-workspace';

const temporaryDirectories: string[] = [];

function createTemporaryDirectory(): string {
  const directory = mkdtempSync(join(tmpdir(), 'niancode-image-workspace-'));
  temporaryDirectories.push(directory);
  return directory;
}

function createService(userDataDir: string) {
  let sequence = 0;
  return new LocalImageWorkspace({
    userDataDir,
    now: () => new Date('2026-07-29T10:00:00.000Z'),
    createId: () => String(++sequence),
  });
}

afterEach(() => {
  for (const directory of temporaryDirectories.splice(0)) {
    rmSync(directory, { recursive: true, force: true });
  }
});

describe('local image workspace', () => {
  it('routes the default development command through the local workspace adapter', () => {
    const packageJson = JSON.parse(readFileSync(join(process.cwd(), 'package.json'), 'utf8')) as {
      scripts: Record<string, string>;
    };

    expect(packageJson.scripts.dev).toBe('node scripts/run-local-image-workspace-dev.mjs');
    expect(packageJson.scripts['dev:image-workspace:local']).toBe('node scripts/run-local-image-workspace-dev.mjs');
  });

  it('enables local mode for an unpackaged development server and never for packaged apps', () => {
    expect(isLocalImageWorkspaceDevelopmentEnabled({ isPackaged: false, configuredMode: 'local' })).toBe(true);
    expect(isLocalImageWorkspaceDevelopmentEnabled({ isPackaged: false, isDevelopmentServer: true })).toBe(true);
    expect(isLocalImageWorkspaceDevelopmentEnabled({ isPackaged: false, isDevelopmentServer: false })).toBe(false);
    expect(isLocalImageWorkspaceDevelopmentEnabled({ isPackaged: false, configuredMode: 'cloud', isDevelopmentServer: true })).toBe(false);
    expect(isLocalImageWorkspaceDevelopmentEnabled({ isPackaged: true, configuredMode: 'local' })).toBe(false);
  });

  it('starts without Agents, persists manually added Agents, and survives a new service instance', async () => {
    const userDataDir = createTemporaryDirectory();
    const service = createService(userDataDir);

    const emptyWorkspace = await service.getSnapshot();
    expect(emptyWorkspace).toMatchObject({
      projects: [],
      activeProjectId: null,
    });
    expect(emptyWorkspace).not.toHaveProperty('runtimeMode');

    const created = await service.createProject('  本地角色设计  ');
    expect(created.projects).toHaveLength(1);
    expect(created.projects[0]).toMatchObject({
      name: '本地角色设计',
      agents: [],
      messages: [],
    });

    const withAgent = await service.addAgent(created.projects[0].id);
    const withSecondAgent = await service.addAgent(withAgent.projects[0].id);
    expect(withSecondAgent.projects[0].agents.map((agent) => agent.name)).toEqual([
      '创作 Agent 1',
      '创作 Agent 2',
    ]);

    const reloaded = new LocalImageWorkspace({ userDataDir });
    await expect(reloaded.getSnapshot()).resolves.toMatchObject({
      activeProjectId: created.projects[0].id,
      projects: [{ name: '本地角色设计', agents: [{}, {}] }],
    });
  });

  it('persists reference uploads and creates deterministic multi-image placeholder turns', async () => {
    const userDataDir = createTemporaryDirectory();
    const service = createService(userDataDir);
    const created = await service.createProject('连续创作');
    const withAgent = await service.addAgent(created.projects[0].id);
    const project = withAgent.projects[0];
    const agent = project.agents[0];
    const upload = await service.uploadReference({
      projectId: project.id,
      fileName: '参考图.png',
      mimeType: 'image/png',
      contentBase64: Buffer.from('fake-png-bytes').toString('base64'),
    });

    expect(upload.reference).toMatchObject({
      alt: '参考图.png',
      url: expect.stringMatching(/^data:image\/png;base64,/),
    });

    const input = {
      projectId: project.id,
      agentId: agent.id,
      prompt: '夜色中的机械城堡',
      referenceImageIds: [upload.reference.id],
      settings: {
        modeId: 'edit',
        modelId: 'local-placeholder-v1',
        aspectRatioId: '16:9',
        resolutionId: '1024',
        outputCountId: '2',
      },
    };
    const firstTurn = await service.sendMessage(input);
    const firstOutput = firstTurn.projects[0].messages.at(-1)!;

    expect(firstTurn.projects[0].messages).toHaveLength(2);
    expect(firstTurn.projects[0].messages[0].images).toEqual([upload.reference]);
    expect(firstOutput).toMatchObject({
      role: 'assistant',
      status: 'succeeded',
      text: '已生成 2 张图片。',
    });
    expect(firstOutput.images).toHaveLength(2);
    expect(firstOutput.images[0].url).toMatch(/^data:image\/svg\+xml;base64,/);
    const placeholderSvg = Buffer.from(firstOutput.images[0].url.split(',')[1], 'base64').toString('utf8');
    expect(placeholderSvg).toContain('CREATIVE · 1');
    expect(placeholderSvg).toContain('标准创作模型');
    expect(placeholderSvg).not.toMatch(/LOCAL DEV|local-placeholder-v1|本地开发|本地占位/);

    const secondTurn = await service.sendMessage(input);
    const secondOutput = secondTurn.projects[0].messages.at(-1)!;
    expect(secondOutput.images.map((image) => image.url)).toEqual(
      firstOutput.images.map((image) => image.url),
    );

    const reloaded = new LocalImageWorkspace({ userDataDir });
    expect((await reloaded.getSnapshot()).projects[0].messages).toHaveLength(4);
  });

  it('rejects unknown option ids and removes all persisted data on reset', async () => {
    const userDataDir = createTemporaryDirectory();
    const service = createService(userDataDir);
    const created = await service.createProject('可重置项目');
    const withAgent = await service.addAgent(created.projects[0].id);
    const project = withAgent.projects[0];

    await expect(service.sendMessage({
      projectId: project.id,
      agentId: project.agents[0].id,
      prompt: '测试',
      referenceImageIds: [],
      settings: { modelId: 'unknown-model' },
    })).rejects.toMatchObject<LocalImageWorkspaceError>({
      status: 400,
      code: 'IMAGE_WORKSPACE_INVALID_SETTING',
    });

    expect(existsSync(getLocalImageWorkspaceDirectory(userDataDir))).toBe(true);
    await expect(service.reset()).resolves.toMatchObject({ projects: [], activeProjectId: null });
    expect(existsSync(getLocalImageWorkspaceDirectory(userDataDir))).toBe(false);
    await expect(new LocalImageWorkspace({ userDataDir }).getSnapshot()).resolves.toMatchObject({ projects: [] });
  });
});