/**
 * openai-format 孤立 tool 消息过滤测试（v0.6.2 会话停止根因的纵深防御）
 *
 * 背景：OpenAI/DeepSeek 协议要求 role='tool' 消息必须紧跟带 tool_calls 的
 * assistant 消息，违反直接 400 且不可重试。engine 侧已保证配对，此处验证
 * 共享构建函数对任何来源历史污染的兜底过滤。
 */

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

vi.mock('electron-log', () => ({
  default: { info: vi.fn(), warn: vi.fn(), error: vi.fn(), debug: vi.fn() },
}));

import { buildOpenAICompatibleMessages } from '../shared/openai-format';
import type { MetonaRequest } from '../../types';

const systemPrompt = { roleDefinition: 'r', outputConstraints: 'o', safetyGuidelines: 's' };

function makeRequest(messages: MetonaRequest['messages']): MetonaRequest {
  return {
    meta: {
      sessionId: 's',
      iteration: 1,
      requestId: 'r',
      timestamp: Date.now(),
      agentVersion: 't',
    },
    systemPrompt,
    messages,
    params: { stream: false },
  };
}

describe('buildOpenAICompatibleMessages — 孤立 tool 过滤', () => {
  it('正常配对序列完整保留（assistant(tool_calls) → tool）', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        { role: 'user', content: 'hi', timestamp: Date.now() },
        {
          role: 'assistant',
          content: null,
          toolCalls: [
            { id: 'tc_1', name: 'read_file', args: {}, iteration: 1, timestamp: Date.now() },
          ],
          timestamp: Date.now(),
        },
        {
          role: 'tool',
          content: null,
          toolResult: {
            toolCallId: 'tc_1',
            toolName: 'read_file',
            result: 'data',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
      ]),
    );
    // system + user + assistant + tool
    expect(out).toHaveLength(4);
    expect(out[2].role).toBe('assistant');
    expect(out[2].tool_calls).toHaveLength(1);
    expect(out[3].role).toBe('tool');
    expect(out[3].tool_call_id).toBe('tc_1');
  });

  it('孤立 tool 消息（前面无 assistant tool_calls）被丢弃，不产生 400 序列', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        { role: 'user', content: 'hi', timestamp: Date.now() },
        {
          role: 'tool',
          content: null,
          toolResult: {
            toolCallId: 'tc_orphan',
            toolName: 'read_file',
            result: 'x',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
      ]),
    );
    // system + user（孤立 tool 被过滤）
    expect(out).toHaveLength(2);
    expect(out.every((m) => m.role !== 'tool')).toBe(true);
  });

  it('tool_call_id 不匹配最近 assistant 的 tool 消息也被过滤', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        { role: 'user', content: 'hi', timestamp: Date.now() },
        {
          role: 'assistant',
          content: null,
          toolCalls: [
            { id: 'tc_a', name: 'read_file', args: {}, iteration: 1, timestamp: Date.now() },
          ],
          timestamp: Date.now(),
        },
        {
          role: 'tool',
          content: null,
          // id 不匹配 tc_a
          toolResult: {
            toolCallId: 'tc_other',
            toolName: 'read_file',
            result: 'x',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
      ]),
    );
    expect(out).toHaveLength(3);
    expect(out.every((m) => m.role !== 'tool')).toBe(true);
  });

  it('多轮工具配对全部保留', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        { role: 'user', content: 'hi', timestamp: Date.now() },
        {
          role: 'assistant',
          content: null,
          toolCalls: [
            { id: 'tc_1', name: 'a', args: {}, iteration: 1, timestamp: Date.now() },
            { id: 'tc_2', name: 'b', args: {}, iteration: 1, timestamp: Date.now() },
          ],
          timestamp: Date.now(),
        },
        {
          role: 'tool',
          content: null,
          toolResult: {
            toolCallId: 'tc_2',
            toolName: 'b',
            result: 'r2',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
        {
          role: 'tool',
          content: null,
          toolResult: {
            toolCallId: 'tc_1',
            toolName: 'a',
            result: 'r1',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
        {
          role: 'assistant',
          content: null,
          toolCalls: [{ id: 'tc_3', name: 'c', args: {}, iteration: 2, timestamp: Date.now() }],
          timestamp: Date.now(),
        },
        {
          role: 'tool',
          content: null,
          toolResult: {
            toolCallId: 'tc_3',
            toolName: 'c',
            result: 'r3',
            success: true,
            durationMs: 1,
            timestamp: Date.now(),
          },
          timestamp: Date.now(),
        },
      ]),
    );
    expect(out).toHaveLength(7);
    expect(out.filter((m) => m.role === 'tool')).toHaveLength(3);
  });

  it('includeImages=true 时 images 转 content parts（原位转换，索引与过滤后序列对齐）', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        {
          role: 'user',
          content: 'look',
          images: [{ url: 'data:image/png;base64,xxx' }],
          timestamp: Date.now(),
        },
      ]),
      true,
    );
    const content = out[1].content as Array<Record<string, unknown>>;
    expect(Array.isArray(content)).toBe(true);
    expect(content[0]).toEqual({ type: 'text', text: 'look' });
    expect(content[1]).toEqual({
      type: 'image_url',
      image_url: { url: 'data:image/png;base64,xxx' },
    });
  });

  it('includeImages=false（DeepSeek 非 vision）时 images 静默丢弃', () => {
    const out = buildOpenAICompatibleMessages(
      makeRequest([
        {
          role: 'user',
          content: 'look',
          images: [{ url: 'data:image/png;base64,xxx' }],
          timestamp: Date.now(),
        },
      ]),
    );
    expect(out[1].content).toBe('look');
  });
});