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

import { type AssistantContentBlock } from '@/types/index';

import { POST_TOOL_FINAL_ANSWER_SCORE_THRESHOLD } from './constants';
import {
  getPostToolAnswerSplitIndex,
  getToolDisplayName,
  getWorkflowStreamingHeadlineState,
  getWorkflowSummaryText,
  scoreBlockContentAsAnswerLike,
  scorePostToolBlockAsFinalAnswer,
  shapeProseForWorkflowHeadline,
} from './toolDisplayNames';

const blk = (p: Partial<AssistantContentBlock> & { id: string }): AssistantContentBlock =>
  ({ content: '', ...p }) as AssistantContentBlock;

describe('tool display names', () => {
  it('uses friendly labels for Codex tool api names', () => {
    expect(getToolDisplayName('command_execution')).toBe('Ran a command');
    expect(getToolDisplayName('file_change')).toBe('Edited a file');
    expect(getToolDisplayName('mcp_tool_call')).toBe('Called MCP tool');
    expect(getToolDisplayName('todo_list')).toBe('Updated todos');
    expect(getToolDisplayName('web_search')).toBe('Searched the web');
  });

  it('uses friendly Codex labels in workflow summaries', () => {
    const summary = getWorkflowSummaryText([
      blk({
        id: '0',
        tools: [
          { apiName: 'command_execution', id: 'tool-1', result: { content: 'ok' } } as any,
          { apiName: 'command_execution', id: 'tool-2', result: { content: 'ok' } } as any,
          { apiName: 'file_change', id: 'tool-3', result: { content: 'ok' } } as any,
          { apiName: 'mcp_tool_call', id: 'tool-4', result: { content: 'ok' } } as any,
          { apiName: 'web_search', id: 'tool-5', result: { content: 'ok' } } as any,
        ],
      }),
    ]);

    expect(summary).toContain('Ran a command (2)');
    expect(summary).toContain('Edited a file');
    expect(summary).toContain('Called MCP tool');
    expect(summary).toContain('Searched the web');
    expect(summary).not.toContain('Command_execution');
    expect(summary).not.toContain('File_change');
    expect(summary).not.toContain('Mcp_tool_call');
    expect(summary).not.toContain('Web_search');
  });

  it('uses friendly labels for Linear MCP tool names', () => {
    expect(getToolDisplayName('mcp__claude_ai_Linear__save_issue')).toBe('Linear · Save issue');
    expect(getToolDisplayName('mcp__linear-server__get_issue')).toBe('Linear · Get issue');
  });
});

describe('shapeProseForWorkflowHeadline', () => {
  it('does not split on dot inside Node.js in CJK prose', () => {
    const s =
      '我来帮您搜索 Node.js 24 的发布说明并撰写一份全面的技术总结。首先，我需要激活必要的工具来进行搜索和文件操作。';
    const out = shapeProseForWorkflowHeadline(s);
    expect(out).toContain('Node.js 24');
    expect(out).toContain('技术总结');
    expect(out).not.toMatch(/^我来帮您搜索 Node\.?\s*$/i);
  });

  it('uses Latin sentence dot when no CJK', () => {
    const s = 'Search Node.js 24 release notes. Then crawl docs.';
    const out = shapeProseForWorkflowHeadline(s);
    expect(out).toContain('Node.js 24');
    expect(out).toContain('release notes');
    expect(out).not.toContain('Then crawl');
  });
});

describe('post-tool final answer split', () => {
  it('scores long structured content as answer-like even when tools share the block', () => {
    const score = scoreBlockContentAsAnswerLike(
      blk({
        id: 'mixed',
        content:
          '先总结当前结论。\n\n## 下一步\n\n- 对比方案 A\n- 对比方案 B\n- 给出推荐与风险说明。',
        tools: [{ apiName: 'search', id: 't1' } as any],
      }),
    );

    expect(score).toBeGreaterThanOrEqual(POST_TOOL_FINAL_ANSWER_SCORE_THRESHOLD);
  });

  it('returns split index for long structured prose-only block after last tool', () => {
    const long =
      'Direct summary - Node.js 24 (released May 6, 2025) is a major platform update that upgrades V8 to a newer track, ships notable HTTP and fetch-related changes, and introduces practical migration items for native addons and tooling.\n\n## Checklist\n\n- Rebuild native modules';
    const blocks = [
      blk({ id: '0', content: 'intro', tools: [{ apiName: 'search', id: 't1' } as any] }),
      blk({ id: '1', content: long }),
    ];
    const ix = getPostToolAnswerSplitIndex(blocks, 0, true, true);
    expect(ix).toBe(1);
  });

  it('does not split short step line after tools', () => {
    const blocks = [
      blk({ id: '0', content: 'x', tools: [{ apiName: 'search', id: 't1' } as any] }),
      blk({ id: '1', content: '现在我来搜索资料。' }),
    ];
    expect(scorePostToolBlockAsFinalAnswer(blocks[1]!)).toBeLessThan(
      POST_TOOL_FINAL_ANSWER_SCORE_THRESHOLD,
    );
    expect(getPostToolAnswerSplitIndex(blocks, 0, true, true)).toBeNull();
  });
});

describe('reasoning headline extraction', () => {
  it('uses the last markdown heading for a trailing thinking-only block', () => {
    const state = getWorkflowStreamingHeadlineState([
      blk({
        id: '0',
        content: '',
        reasoning: {
          content:
            '# Initial framing\n\nSome details.\n\n## Search release notes\n\nMore details.\n\n### Finalize patch plan',
        } as any,
      }),
    ]);

    expect(state).toEqual({
      kind: 'thinking',
      reasoningTitle: 'Finalize patch plan',
    });
  });

  it('prefers tool state when the trailing block has tools', () => {
    const state = getWorkflowStreamingHeadlineState([
      blk({
        id: '0',
        reasoning: {
          content: '### Search release notes',
        } as any,
      }),
      blk({
        id: '1',
        tools: [
          {
            apiName: 'search',
            arguments: '{"query":"Node.js 24"}',
            result: {
              state: { workflowHeadline: { stepMessage: 'Searching release notes' } },
            },
          } as any,
        ],
      }),
    ]);

    expect(state).toEqual({
      explicitStep: 'Searched the web: Searching release notes',
      fallbackTool: 'Searched the web: Node.js 24',
      kind: 'tool',
    });
  });

  it('uses prose state when the trailing block is prose', () => {
    const state = getWorkflowStreamingHeadlineState([
      blk({
        id: '0',
        tools: [{ apiName: 'search', id: 't1' } as any],
      }),
      blk({
        id: '1',
        content: 'Now I will compare the release notes and summarize the migration changes.',
        reasoning: {
          content: '### Planning',
        } as any,
      }),
    ]);

    expect(state).toEqual({
      kind: 'prose',
      proseSource: 'Now I will compare the release notes and summarize the migration changes.',
    });
  });

  it('falls back to the previous usable block when trailing thinking has no heading', () => {
    const state = getWorkflowStreamingHeadlineState([
      blk({
        id: '0',
        tools: [
          {
            apiName: 'search',
            arguments: '{"query":"Node.js 24"}',
            result: {
              state: { workflowHeadline: { stepMessage: 'Searching release notes' } },
            },
          } as any,
        ],
      }),
      blk({
        id: '1',
        reasoning: {
          content: 'Thinking through the comparison strategy without a markdown heading.',
        } as any,
      }),
    ]);

    expect(state).toEqual({
      explicitStep: 'Searched the web: Searching release notes',
      fallbackTool: 'Searched the web: Node.js 24',
      kind: 'tool',
    });
  });

  it('falls back to the previous usable block when trailing prose is too short', () => {
    const state = getWorkflowStreamingHeadlineState([
      blk({
        id: '0',
        reasoning: {
          content: '### Search release notes',
        } as any,
      }),
      blk({
        id: '1',
        content: 'ok',
      }),
    ]);

    expect(state).toEqual({
      kind: 'thinking',
      reasoningTitle: 'Search release notes',
    });
  });
});
