"""
Agent 工具函数

提供便捷的封装方法，简化 Agent 的使用。
"""

from typing import Dict, Any, Optional
from pathlib import Path
from agent.core.runner import AgentRunner, RunConfig
from agent.llm.openrouter import create_openrouter_llm_call
from agent.trace.models import Trace, Message
from agent.trace.store import FileSystemTraceStore


DEFAULT_MODEL = "google/gemini-3-flash-preview"


async def run_agent(
    prompt: str,
    model: str = DEFAULT_MODEL,
    **run_config_kwargs
) -> str:
    """
    通用 Agent 执行方法
    
    传入 prompt，返回 agent 执行的返回结果（summary 字符串）。
    
    Args:
        prompt: 用户输入的提示词
        model: 模型名称，默认为 "google/gemini-3-flash-preview"
        **run_config_kwargs: 其他 RunConfig 参数，如：
            - temperature: float = 0.3
            - max_iterations: int = 200
            - tools: Optional[List[str]] = None
            - system_prompt: Optional[str] = None
            - enable_memory: bool = True
            - auto_execute_tools: bool = True
            - name: Optional[str] = None
            等等
    
    Returns:
        str: Agent 的最终回复文本（summary）
    
    Example:
        ```python
        result = await run_agent("帮我分析一下这个代码")
        print(result)
        ```
    """
    # 创建 AgentRunner（需要 trace_store 以支持 goal 工具）
    trace_dir = Path(".trace")
    trace_dir.mkdir(exist_ok=True)
    trace_store = FileSystemTraceStore(base_path=str(trace_dir))
    
    runner = AgentRunner(
        trace_store=trace_store,
        llm_call=create_openrouter_llm_call(model=model),
    )
    
    # 构建消息
    messages = [{"role": "user", "content": prompt}]
    
    # 构建 RunConfig
    config = RunConfig(
        model=model,
        **run_config_kwargs
    )
    
    # 执行并输出过程日志
    last_assistant_text = ""
    final_trace: Optional[Trace] = None
    
    async for item in runner.run(messages=messages, config=config):
        if isinstance(item, Trace):
            final_trace = item
            if item.status == "running":
                print(f"\n{'='*60}")
                print(f"[Trace] 🚀 开始执行")
                print(f"  Trace ID: {item.trace_id[:8]}...")
                print(f"{'='*60}")
            elif item.status == "completed":
                print(f"\n{'='*60}")
                print(f"[Trace] ✅ 执行完成")
                print(f"  - 总消息数: {item.total_messages}")
                print(f"  - 总 Token 数: {item.total_tokens}")
                print(f"  - 总成本: ${item.total_cost:.4f}")
                print(f"{'='*60}")
            elif item.status == "failed":
                print(f"\n{'='*60}")
                print(f"[Trace] ❌ 执行失败")
                print(f"  错误信息: {item.error_message}")
                print(f"{'='*60}")
            elif item.status == "stopped":
                print(f"\n{'='*60}")
                print(f"[Trace] ⏸️ 执行已停止")
                print(f"{'='*60}")
        
        elif isinstance(item, Message):
            # 输出消息序列号和时间信息
            seq_info = f"[序列 {item.sequence}]"
            if item.parent_sequence:
                seq_info += f" (父序列: {item.parent_sequence})"
            
            if item.role == "assistant":
                content = item.content
                if isinstance(content, dict):
                    text = content.get("text", "")
                    tool_calls = content.get("tool_calls")
                    
                    # 输出思考过程和文本内容
                    if text:
                        if not tool_calls:
                            # 最终回复
                            last_assistant_text = text
                            print(f"\n{seq_info} [思考过程] 🤔 Agent 思考与回复:")
                            print(f"{'-'*60}")
                            print(text)
                            print(f"{'-'*60}")
                        else:
                            # 有工具调用的思考过程
                            print(f"\n{seq_info} [思考过程] 🤔 Agent 思考:")
                            print(f"{'-'*60}")
                            print(text)
                            print(f"{'-'*60}")
                    
                    # 输出工具调用详细信息
                    if tool_calls:
                        print(f"\n{seq_info} [工具调用] 🛠️ 调用 {len(tool_calls)} 个工具:")
                        for idx, tc in enumerate(tool_calls, 1):
                            func_info = tc.get("function", {})
                            tool_name = func_info.get("name", "unknown")
                            tool_id = tc.get("id", "unknown")
                            tool_args = func_info.get("arguments", "")
                            
                            print(f"  [{idx}] 工具名称: {tool_name}")
                            print(f"      调用 ID: {tool_id[:16]}...")
                            try:
                                import json
                                args_dict = json.loads(tool_args) if isinstance(tool_args, str) else tool_args
                                args_str = json.dumps(args_dict, ensure_ascii=False, indent=2)
                                if len(args_str) > 500:
                                    args_str = args_str[:500] + "..."
                                print(f"      参数: {args_str}")
                            except:
                                args_preview = str(tool_args)[:200] + "..." if len(str(tool_args)) > 200 else str(tool_args)
                                print(f"      参数: {args_preview}")
                            print()
                elif isinstance(content, str):
                    # 纯文本内容
                    last_assistant_text = content
                    print(f"\n{seq_info} [思考过程] 🤔 Agent 回复:")
                    print(f"{'-'*60}")
                    print(content)
                    print(f"{'-'*60}")
            
            elif item.role == "tool":
                # 输出工具执行结果详细信息
                content = item.content
                tool_name = "unknown"
                tool_result = ""
                
                if isinstance(content, dict):
                    tool_name = content.get("tool_name", "unknown")
                    result = content.get("result", "")
                    if isinstance(result, (dict, list)):
                        import json
                        tool_result = json.dumps(result, ensure_ascii=False, indent=2)
                    else:
                        tool_result = str(result)
                else:
                    tool_result = str(content) if content else ""
                
                print(f"\n{seq_info} [工具结果] ✅ {tool_name} 执行完成")
                if item.tool_call_id:
                    print(f"  关联调用 ID: {item.tool_call_id[:16]}...")
                print(f"{'-'*60}")
                if tool_result:
                    if len(tool_result) > 1000:
                        print(tool_result[:1000])
                        print(f"\n... (结果已截断，共 {len(tool_result)} 字符)")
                    else:
                        print(tool_result)
                else:
                    print("  (无返回结果)")
                print(f"{'-'*60}")
                
                # 输出工具描述和元数据（如果有）
                if item.description:
                    print(f"  描述: {item.description}")
                if item.duration_ms:
                    print(f"  执行耗时: {item.duration_ms}ms")
                if item.cost:
                    print(f"  成本: ${item.cost:.6f}")
            
            elif item.role == "user":
                # 输出用户输入（可选，用于调试）
                if isinstance(item.content, str) and len(item.content) > 0:
                    preview = item.content[:200] + "..." if len(item.content) > 200 else item.content
                    print(f"\n{seq_info} [用户输入] 👤 {preview}")
    
    # 如果没有获取到最终 trace，尝试从 store 获取
    if not final_trace and config.trace_id and runner.trace_store:
        final_trace = await runner.trace_store.get_trace(config.trace_id)
    
    # 如果没有 summary，返回错误信息
    if not last_assistant_text:
        error_msg = final_trace.error_message if final_trace else "Agent 没有产生 assistant 文本结果"
        print(f"\n[Error] {error_msg}")
        return error_msg
    
    return last_assistant_text