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

import {
  ChatTimeHistoryMapper,
  ChatTimeTimelineBuilder,
} from '../chat-time';

describe('chat-time timeline builder', () => {
  it('builds assistant thinking and message in the same assistant item', () => {
    const items: any[] = [];

    ChatTimeTimelineBuilder.appendUserMessage(items, {
      content: '你好',
      created: 1,
      id: 'user-1',
    });
    ChatTimeTimelineBuilder.appendThinkingDelta(items, '先想一下', 2);
    ChatTimeTimelineBuilder.appendMessageDelta(items, '最终回答', 3);
    ChatTimeTimelineBuilder.finalize(items);

    expect(items).toHaveLength(2);
    expect(items[1]).toMatchObject({
      content: '最终回答',
      role: 'assistant',
    });
    expect(items[1].segments).toMatchObject([
      { content: '先想一下', status: 'end', type: 'thinking' },
      { content: '最终回答', type: 'text' },
    ]);
  });

  it('creates a new assistant item after tool result', () => {
    const items: any[] = [];

    ChatTimeTimelineBuilder.appendMessageDelta(items, '第一段回答', 1);
    ChatTimeTimelineBuilder.upsertToolCall(items, {
      name: 'search_docs',
      toolCallId: 'tool-1',
      value: '{"query":"java"}',
    });
    ChatTimeTimelineBuilder.upsertToolResult(items, {
      result: '{"hits":1}',
      toolCallId: 'tool-1',
    });
    ChatTimeTimelineBuilder.appendThinkingDelta(items, '继续思考', 2);
    ChatTimeTimelineBuilder.appendMessageDelta(items, '第二段回答', 3);
    ChatTimeTimelineBuilder.finalize(items);

    expect(items).toHaveLength(3);
    expect(items[0]).toMatchObject({ content: '第一段回答', role: 'assistant' });
    expect(items[1]).toMatchObject({
      name: 'search_docs',
      result: '{"hits":1}',
      role: 'tool',
      status: 'TOOL_RESULT',
      toolCallId: 'tool-1',
    });
    expect(items[2]).toMatchObject({ content: '第二段回答', role: 'assistant' });
    expect(items[2].segments).toMatchObject([
      { content: '继续思考', status: 'end', type: 'thinking' },
      { content: '第二段回答', type: 'text' },
    ]);
  });
});

describe('chat-time history mapper', () => {
  it('expands structured messageChain into assistant and tool timeline items', () => {
    const items = ChatTimeHistoryMapper.fromHistoryRecords([
      {
        contentPayload: {
          messageChain: [
            {
              content: '先回答一点',
              reasoningContent: '先思考',
              role: 'assistant',
              toolCalls: [
                {
                  arguments: '{"query":"java"}',
                  id: 'tool-1',
                  name: 'search_docs',
                },
              ],
            },
            {
              content: '{"hits":1}',
              role: 'tool',
              toolCallId: 'tool-1',
            },
            {
              content: '最后总结',
              reasoningContent: '继续思考',
              role: 'assistant',
            },
          ],
        },
        created: 100,
        id: 'assistant-record',
        senderRole: 'assistant',
      },
    ]);

    expect(items).toHaveLength(3);
    expect(items[0]).toMatchObject({
      content: '先回答一点',
      role: 'assistant',
    });
    expect(items[1]).toMatchObject({
      arguments: '{"query":"java"}',
      name: 'search_docs',
      result: '{"hits":1}',
      role: 'tool',
      toolCallId: 'tool-1',
    });
    expect(items[2]).toMatchObject({
      content: '最后总结',
      role: 'assistant',
    });
    expect(items[0]?.id).not.toBe(items[2]?.id);
  });

  it('falls back to legacy chains when messageChain is unavailable', () => {
    const items = ChatTimeHistoryMapper.fromLegacyMessages([
      {
        chains: [
          {
            reasoning_content: '旧思考',
            thinkingStatus: 'end',
          },
          {
            id: 'tool-2',
            name: 'legacy_tool',
            result: '{"ok":true}',
            status: 'TOOL_RESULT',
          },
        ],
        content: '旧回答',
        created: '2026-05-11 10:00:00',
        id: 'legacy-1',
        role: 'assistant',
      },
    ]);

    expect(items).toHaveLength(2);
    expect(items[0]).toMatchObject({
      content: '旧回答',
      role: 'assistant',
    });
    expect(items[0].segments).toMatchObject([
      { content: '旧思考', status: 'end', type: 'thinking' },
      { content: '旧回答', type: 'text' },
    ]);
    expect(items[1]).toMatchObject({
      name: 'legacy_tool',
      result: '{"ok":true}',
      role: 'tool',
      toolCallId: 'tool-2',
    });
  });
});