/**
 * v0.8.0 P0-3: 思考参数 × 模型能力 门控矩阵。
 *
 * 根因回顾：MODEL_INFO 标注 supportsThinking:false 的模型（如
 * deepseek-v4-flash-vision-exp）此前仍被发送 thinking 参数 —— 思考耗尽输出
 * 预算（8192 上限）导致 finish_reason=length 空回复、会话静默停止。
 * 本文件钉住四家 Provider 的能力门控行为与输出预算告警前置条件。
 */

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 thinking capability gate', () => {
  it('DeepSeek: vision-exp (supportsThinking:false) → thinking disabled, no reasoning_effort, max_tokens clamped to 8192', 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: 'disabled' });
    expect(body.reasoning_effort).toBeUndefined();
    expect(body.max_tokens).toBe(8192);
  });

  it('DeepSeek: pro (supportsThinking:true) → thinking enabled + reasoning_effort mapped (max→max)', async () => {
    const adapter = new DeepSeekAdapter({
      provider: 'deepseek',
      baseURL: 'https://api.deepseek.com',
      apiKey: 'k',
      defaultModel: 'deepseek-v4-pro',
    });
    const body = asNative(adapter)(makeRequest(), false);
    expect(body.thinking).toEqual({ type: 'enabled' });
    expect(body.reasoning_effort).toBe('max');
  });

  it('Agnes: supportsThinking:false model → enable_thinking:false', async () => {
    const adapter = new AgnesAdapter({
      provider: 'agnes',
      baseURL: 'https://apihub.agnes-ai.com/v1',
      apiKey: 'k',
      defaultModel: 'agnes-2.0-flash',
    });
    // 临时改写元信息模拟"不支持思考"的模型，结束后恢复
    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: false });
    } finally {
      table['agnes-2.0-flash'].supportsThinking = original;
    }
  });

  it('Agnes: supportsThinking:true model → enable_thinking:true', 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(), false);
    expect(body.chat_template_kwargs).toEqual({ enable_thinking: true });
  });

  it('MiMo: supportsThinking:false model → thinking disabled + temperature passthrough', 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: 'disabled' });
      expect(body.temperature).toBe(0);
    } finally {
      table['mimo-v2.5-pro'].supportsThinking = original;
    }
  });

  it('Ollama: probed no-thinking (cachedThinkingSupport=false) → no think parameter', 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: probe unknown (null) fails open → think parameter present', 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); // effort=max → true
  });
});