import { afterEach, describe, expect, it, vi } from 'vitest';

import {
  createEditorAgentConversation,
  deleteEditorAgentConversation,
  getEditorAgentConversation,
  listEditorAgentConversations,
  streamEditorAgentMessage,
} from './editorAgentClient';

const requestJsonMock = vi.hoisted(() => vi.fn());
const fetchWithApiAuthMock = vi.hoisted(() => vi.fn());

vi.mock('../apiClient', () => ({
  requestJson: requestJsonMock,
  fetchWithApiAuth: fetchWithApiAuthMock,
}));

function createSseResponse(payload: string) {
  const encoder = new TextEncoder();
  return new Response(
    new ReadableStream<Uint8Array>({
      start(controller) {
        controller.enqueue(encoder.encode(payload));
        controller.close();
      },
    }),
    {
      status: 200,
      headers: { 'Content-Type': 'text/event-stream; charset=utf-8' },
    },
  );
}

describe('editorAgentClient', () => {
  afterEach(() => {
    requestJsonMock.mockReset();
    fetchWithApiAuthMock.mockReset();
  });

  it('uses the planned editor agent conversation CRUD routes', async () => {
    requestJsonMock
      .mockResolvedValueOnce({
        conversations: [
          {
            conversationId: 'conversation-1',
            projectId: 'project-1',
            title: '角色参考',
            createdAt: '2026-07-03T00:00:00.000Z',
            updatedAt: '2026-07-03T00:00:00.000Z',
          },
        ],
      })
      .mockResolvedValueOnce({
        conversation: {
          conversationId: 'conversation-2',
          projectId: 'project-1',
          title: '新对话',
          messages: [],
          createdAt: '2026-07-03T00:00:00.000Z',
          updatedAt: '2026-07-03T00:01:00.000Z',
        },
      })
      .mockResolvedValueOnce({
        conversation: {
          conversationId: 'conversation-1',
          projectId: 'project-1',
          title: '角色参考',
          messages: [],
          createdAt: '2026-07-03T00:00:00.000Z',
          updatedAt: '2026-07-03T00:02:00.000Z',
        },
      })
      .mockResolvedValueOnce({
        conversation: {
          conversationId: 'conversation-1',
          projectId: 'project-1',
          title: '角色参考',
          messages: [],
          createdAt: '2026-07-03T00:00:00.000Z',
          updatedAt: '2026-07-03T00:02:00.000Z',
        },
      });

    await listEditorAgentConversations('project-1');
    await createEditorAgentConversation('project-1', { title: '新对话' });
    await getEditorAgentConversation('conversation-1');
    await deleteEditorAgentConversation('conversation-1');

    expect(requestJsonMock).toHaveBeenNthCalledWith(
      1,
      '/api/editor/projects/project-1/agent-conversations',
      { method: 'GET' },
      '读取画布 Agent 会话列表失败',
    );
    expect(requestJsonMock).toHaveBeenNthCalledWith(
      2,
      '/api/editor/projects/project-1/agent-conversations',
      expect.objectContaining({
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ title: '新对话' }),
      }),
      '创建画布 Agent 会话失败',
    );
    expect(requestJsonMock).toHaveBeenNthCalledWith(
      3,
      '/api/editor/agent-conversations/conversation-1',
      { method: 'GET' },
      '读取画布 Agent 会话失败',
    );
    expect(requestJsonMock).toHaveBeenNthCalledWith(
      4,
      '/api/editor/agent-conversations/conversation-1',
      { method: 'DELETE' },
      '删除画布 Agent 会话失败',
    );
  });

  it('posts editor agent message streams and emits typed SSE events', async () => {
    fetchWithApiAuthMock.mockResolvedValueOnce(
      createSseResponse(
        [
          'event: stage',
          'data: {"conversationId":"conversation-1","stage":"thinking"}',
          '',
          'event: message_delta',
          'data: {"conversationId":"conversation-1","messageId":"assistant-1","role":"assistant","kind":"chat","textDelta":"我先看一下"}',
          '',
          'event: done',
          'data: {"conversationId":"conversation-1","title":"生成角色"}',
          '',
          '',
        ].join('\n'),
      ),
    );
    const events: string[] = [];

    await streamEditorAgentMessage(
      'conversation-1',
      {
        clientMessageId: 'client-message-1',
        text: '帮我把角色改成像素风',
        attachments: [],
      },
      {
        onEvent: (event) => events.push(event.event),
      },
    );

    expect(events).toEqual(['stage', 'message_delta', 'done']);
    expect(fetchWithApiAuthMock).toHaveBeenCalledWith(
      '/api/editor/agent-conversations/conversation-1/messages/stream',
      expect.objectContaining({
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          clientMessageId: 'client-message-1',
          text: '帮我把角色改成像素风',
          attachments: [],
        }),
      }),
      expect.objectContaining({
        timeoutMs: 1_200_000,
        authImpact: 'local',
      }),
    );
  });
});