/**
 * v0.8.0 P0-3（修订版）: 思考参数**用户意图优先**契约。
 *
 * 修订原因：初版按 MODEL_INFO.supportsThinking 元信息硬门控，但事故复盘证明
 * 元信息不可靠 —— deepseek-v4-flash-vision-exp 标注"不支持思考"、实际却产生了
 * 8189 token 推理内容。既然引擎已有完整兜底链（最大输出上限配置 → 空响应守卫
 * → 降级重试 → OUTPUT_LENGTH_EXCEEDED 明确报错），是否开思考应由**用户决定**，
 * 适配器层只负责：①如实透传用户配置；②元信息不符时告警不拦截；③预算过小告警。
 *
 * 保留的唯一门控是 Ollama 的 /api/show capabilities 探测 —— 那是服务端实时
 * 真值且为硬协议约束（向无思考能力的模型发 think 每次请求 400），属协议
 * 正确性而非用户意图覆盖。
 */

import { describe, it, expect } from 'vitest';
import { DeepSeekAdapter } from '../deepseek.adapter';
import { AgnesAdapter } from '../agnes-ai.adapter';
import { MimoAdapter } from '../mimo.adapter';
import { OllamaAdapter } from '../ollama.adapter';
import type { MetonaRequest } from '../../types';

const SYSTEM_PROMPT = {
  roleDefinition: 'test',
  outputConstraints: '',
  safetyGuidelines: '',
};

function makeRequest(overrides?: Partial<MetonaRequest['params']>): MetonaRequest {
  return {
    meta: {
      sessionId: 's',
      iteration: 1,
      requestId: 'r',
      timestamp: Date.now(),
      agentVersion: '1.0.0',
    },
    systemPrompt: SYSTEM_PROMPT,
    messages: [{ role: 'user', content: 'hi', timestamp: Date.now() }],
    params: {
      maxTokens: 63488,
      temperature: 0,
      stream: true,
      thinkingEnabled: true,
      thinkingEffort: 'max',
      ...overrides,
    },
  };
}

function asNative(
  adapter: unknown,
): (req: MetonaRequest, stream: boolean) => Record<string, unknown> {
  return (
    adapter as { toNativeRequest: (r: MetonaRequest, s: boolean) => Record<string, unknown> }
  ).toNativeRequest.bind(adapter);
}

describe('P0-3 修订: 用户思考意图优先于模型元信息', () => {
  it('DeepSeek: vision-exp（元信息 false）+ 用户开启思考 → 照发 enabled + reasoning_effort，max_tokens 原样透传（v0.8.1 无钳制）', async () => {
    const adapter = new DeepSeekAdapter({
      provider: 'deepseek',
      baseURL: 'https://api.deepseek.com',
      apiKey: 'k',
      defaultModel: 'deepseek-v4-flash-vision-exp',
    });
    const body = asNative(adapter)(makeRequest(), false);
    expect(body.thinking).toEqual({ type: 'enabled' });
    expect(body.reasoning_effort).toBe('max');
    expect(body.max_tokens).toBe(63488);
  });

  it('DeepSeek: 用户关闭思考 → 显式 disabled', async () => {
    const adapter = new DeepSeekAdapter({
      provider: 'deepseek',
      baseURL: 'https://api.deepseek.com',
      apiKey: 'k',
      defaultModel: 'deepseek-v4-flash-vision-exp',
    });
    const body = asNative(adapter)(
      makeRequest({ thinkingEnabled: false, thinkingEffort: undefined }),
      false,
    );
    expect(body.thinking).toEqual({ type: 'disabled' });
    expect(body.reasoning_effort).toBeUndefined();
  });

  it('DeepSeek: 未配置 → 显式 disabled（确定性契约，不依赖服务端隐式默认）', async () => {
    const adapter = new DeepSeekAdapter({
      provider: 'deepseek',
      baseURL: 'https://api.deepseek.com',
      apiKey: 'k',
      defaultModel: 'deepseek-v4-pro',
    });
    const body = asNative(adapter)(makeRequest({ thinkingEnabled: undefined }), false);
    expect(body.thinking).toEqual({ type: 'disabled' });
  });

  it('Agnes: 元信息 false + 用户开启思考 → enable_thinking:true（元信息不拦截）', async () => {
    const adapter = new AgnesAdapter({
      provider: 'agnes',
      baseURL: 'https://apihub.agnes-ai.com/v1',
      apiKey: 'k',
      defaultModel: 'agnes-2.0-flash',
    });
    const table = AgnesAdapter['MODEL_INFO'] as Record<string, { supportsThinking: boolean }>;
    const original = table['agnes-2.0-flash'].supportsThinking;
    table['agnes-2.0-flash'].supportsThinking = false;
    try {
      const body = asNative(adapter)(makeRequest(), false);
      expect(body.chat_template_kwargs).toEqual({ enable_thinking: true });
    } finally {
      table['agnes-2.0-flash'].supportsThinking = original;
    }
  });

  it('Agnes: 用户关闭思考 → enable_thinking:false（对称契约保持）', async () => {
    const adapter = new AgnesAdapter({
      provider: 'agnes',
      baseURL: 'https://apihub.agnes-ai.com/v1',
      apiKey: 'k',
      defaultModel: 'agnes-2.0-flash',
    });
    const body = asNative(adapter)(makeRequest({ thinkingEnabled: false }), false);
    expect(body.chat_template_kwargs).toEqual({ enable_thinking: false });
  });

  it('MiMo: 元信息 false + 用户开启思考 → thinking enabled（temperature 不传）', async () => {
    const adapter = new MimoAdapter({
      provider: 'mimo',
      baseURL: 'https://api.xiaomimimo.com/v1',
      apiKey: 'k',
      defaultModel: 'mimo-v2.5-pro',
    });
    const table = MimoAdapter['MODEL_INFO'] as Record<string, { supportsThinking: boolean }>;
    const original = table['mimo-v2.5-pro'].supportsThinking;
    table['mimo-v2.5-pro'].supportsThinking = false;
    try {
      const body = asNative(adapter)(makeRequest(), false);
      expect(body.thinking).toEqual({ type: 'enabled' });
      expect(body.temperature).toBeUndefined();
    } finally {
      table['mimo-v2.5-pro'].supportsThinking = original;
    }
  });

  it('MiMo: 用户关闭思考 → disabled + temperature/top_p 透传', async () => {
    const adapter = new MimoAdapter({
      provider: 'mimo',
      baseURL: 'https://api.xiaomimimo.com/v1',
      apiKey: 'k',
      defaultModel: 'mimo-v2.5-pro',
    });
    const body = asNative(adapter)(makeRequest({ thinkingEnabled: false }), false);
    expect(body.thinking).toEqual({ type: 'disabled' });
    expect(body.temperature).toBe(0);
  });

  it('MiMo: 未配置（undefined）→ 显式 disabled（v0.8.2 P2-6 与 DeepSeek/Agnes 对齐，不隐式吞用户 temperature）', async () => {
    const adapter = new MimoAdapter({
      provider: 'mimo',
      baseURL: 'https://api.xiaomimimo.com/v1',
      apiKey: 'k',
      defaultModel: 'mimo-v2.5-pro',
    });
    const body = asNative(adapter)(makeRequest({ thinkingEnabled: undefined }), false);
    expect(body.thinking).toEqual({ type: 'disabled' });
    expect(body.temperature).toBe(0);
  });

  it('Ollama: 探测不支持思考（服务端硬约束）→ 不发 think 参数（唯一保留的门控）', async () => {
    const adapter = new OllamaAdapter({
      provider: 'ollama',
      baseURL: 'http://localhost:11434',
      apiKey: '',
      defaultModel: 'qwen3:latest',
    });
    (adapter as unknown as { cachedThinkingSupport: boolean | null }).cachedThinkingSupport = false;
    const body = await (
      adapter as unknown as {
        toNativeRequest: (r: MetonaRequest) => Promise<Record<string, unknown>>;
      }
    ).toNativeRequest(makeRequest());
    expect(body.think).toBeUndefined();
  });

  it('Ollama: 探测未知（null）fail-open → think 参数照发', async () => {
    const adapter = new OllamaAdapter({
      provider: 'ollama',
      baseURL: 'http://localhost:11434',
      apiKey: '',
      defaultModel: 'qwen3:latest',
    });
    (adapter as unknown as { cachedThinkingSupport: boolean | null }).cachedThinkingSupport = null;
    const body = await (
      adapter as unknown as {
        toNativeRequest: (r: MetonaRequest) => Promise<Record<string, unknown>>;
      }
    ).toNativeRequest(makeRequest());
    expect(body.think).toBe(true);
  });
});