"""
Report API路由
提供模拟报告生成、获取、对话等接口
"""

import os
import traceback
import threading
from flask import request, jsonify, send_file

from . import report_bp
from ..config import Config
from ..services.report_agent import ReportAgent, ReportManager, ReportStatus
from ..services.simulation_manager import SimulationManager
from ..models.project import ProjectManager
from ..models.task import TaskManager, TaskStatus
from ..utils.logger import get_logger

logger = get_logger('mirofish.api.report')


# ============== 报告生成接口 ==============

@report_bp.route('/generate', methods=['POST'])
def generate_report():
    """
    生成模拟分析报告（异步任务）
    
    这是一个耗时操作，接口会立即返回task_id，
    使用 GET /api/report/generate/status 查询进度
    
    请求（JSON）：
        {
            "simulation_id": "sim_xxxx",    // 必填，模拟ID
            "force_regenerate": false        // 可选，强制重新生成
        }
    
    返回：
        {
            "success": true,
            "data": {
                "simulation_id": "sim_xxxx",
                "task_id": "task_xxxx",
                "status": "generating",
                "message": "报告生成任务已启动"
            }
        }
    """
    try:
        data = request.get_json() or {}
        
        simulation_id = data.get('simulation_id')
        if not simulation_id:
            return jsonify({
                "success": False,
                "error": "请提供 simulation_id"
            }), 400
        
        force_regenerate = data.get('force_regenerate', False)
        
        # 获取模拟信息
        manager = SimulationManager()
        state = manager.get_simulation(simulation_id)
        
        if not state:
            return jsonify({
                "success": False,
                "error": f"模拟不存在: {simulation_id}"
            }), 404
        
        # 检查是否已有报告
        if not force_regenerate:
            existing_report = ReportManager.get_report_by_simulation(simulation_id)
            if existing_report and existing_report.status == ReportStatus.COMPLETED:
                return jsonify({
                    "success": True,
                    "data": {
                        "simulation_id": simulation_id,
                        "report_id": existing_report.report_id,
                        "status": "completed",
                        "message": "报告已存在",
                        "already_generated": True
                    }
                })
        
        # 获取项目信息
        project = ProjectManager.get_project(state.project_id)
        if not project:
            return jsonify({
                "success": False,
                "error": f"项目不存在: {state.project_id}"
            }), 404
        
        graph_id = state.graph_id or project.graph_id
        if not graph_id:
            return jsonify({
                "success": False,
                "error": "缺少图谱ID，请确保已构建图谱"
            }), 400
        
        simulation_requirement = project.simulation_requirement
        if not simulation_requirement:
            return jsonify({
                "success": False,
                "error": "缺少模拟需求描述"
            }), 400
        
        # 创建异步任务
        task_manager = TaskManager()
        task_id = task_manager.create_task(
            task_type="report_generate",
            metadata={
                "simulation_id": simulation_id,
                "graph_id": graph_id
            }
        )
        
        # 定义后台任务
        def run_generate():
            try:
                task_manager.update_task(
                    task_id,
                    status=TaskStatus.PROCESSING,
                    progress=0,
                    message="初始化Report Agent..."
                )
                
                # 创建Report Agent
                agent = ReportAgent(
                    graph_id=graph_id,
                    simulation_id=simulation_id,
                    simulation_requirement=simulation_requirement
                )
                
                # 进度回调
                def progress_callback(stage, progress, message):
                    task_manager.update_task(
                        task_id,
                        progress=progress,
                        message=f"[{stage}] {message}"
                    )
                
                # 生成报告
                report = agent.generate_report(progress_callback=progress_callback)
                
                # 保存报告
                ReportManager.save_report(report)
                
                if report.status == ReportStatus.COMPLETED:
                    task_manager.complete_task(
                        task_id,
                        result={
                            "report_id": report.report_id,
                            "simulation_id": simulation_id,
                            "status": "completed"
                        }
                    )
                else:
                    task_manager.fail_task(task_id, report.error or "报告生成失败")
                
            except Exception as e:
                logger.error(f"报告生成失败: {str(e)}")
                task_manager.fail_task(task_id, str(e))
        
        # 启动后台线程
        thread = threading.Thread(target=run_generate, daemon=True)
        thread.start()
        
        return jsonify({
            "success": True,
            "data": {
                "simulation_id": simulation_id,
                "task_id": task_id,
                "status": "generating",
                "message": "报告生成任务已启动，请通过 /api/report/generate/status 查询进度",
                "already_generated": False
            }
        })
        
    except Exception as e:
        logger.error(f"启动报告生成任务失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/generate/status', methods=['POST'])
def get_generate_status():
    """
    查询报告生成任务进度
    
    请求（JSON）：
        {
            "task_id": "task_xxxx",         // 可选，generate返回的task_id
            "simulation_id": "sim_xxxx"     // 可选，模拟ID
        }
    
    返回：
        {
            "success": true,
            "data": {
                "task_id": "task_xxxx",
                "status": "processing|completed|failed",
                "progress": 45,
                "message": "..."
            }
        }
    """
    try:
        data = request.get_json() or {}
        
        task_id = data.get('task_id')
        simulation_id = data.get('simulation_id')
        
        # 如果提供了simulation_id，先检查是否已有完成的报告
        if simulation_id:
            existing_report = ReportManager.get_report_by_simulation(simulation_id)
            if existing_report and existing_report.status == ReportStatus.COMPLETED:
                return jsonify({
                    "success": True,
                    "data": {
                        "simulation_id": simulation_id,
                        "report_id": existing_report.report_id,
                        "status": "completed",
                        "progress": 100,
                        "message": "报告已生成",
                        "already_completed": True
                    }
                })
        
        if not task_id:
            return jsonify({
                "success": False,
                "error": "请提供 task_id 或 simulation_id"
            }), 400
        
        task_manager = TaskManager()
        task = task_manager.get_task(task_id)
        
        if not task:
            return jsonify({
                "success": False,
                "error": f"任务不存在: {task_id}"
            }), 404
        
        return jsonify({
            "success": True,
            "data": task.to_dict()
        })
        
    except Exception as e:
        logger.error(f"查询任务状态失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e)
        }), 500


# ============== 报告获取接口 ==============

@report_bp.route('/<report_id>', methods=['GET'])
def get_report(report_id: str):
    """
    获取报告详情
    
    返回：
        {
            "success": true,
            "data": {
                "report_id": "report_xxxx",
                "simulation_id": "sim_xxxx",
                "status": "completed",
                "outline": {...},
                "markdown_content": "...",
                "created_at": "...",
                "completed_at": "..."
            }
        }
    """
    try:
        report = ReportManager.get_report(report_id)
        
        if not report:
            return jsonify({
                "success": False,
                "error": f"报告不存在: {report_id}"
            }), 404
        
        return jsonify({
            "success": True,
            "data": report.to_dict()
        })
        
    except Exception as e:
        logger.error(f"获取报告失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/by-simulation/<simulation_id>', methods=['GET'])
def get_report_by_simulation(simulation_id: str):
    """
    根据模拟ID获取报告
    
    返回：
        {
            "success": true,
            "data": {
                "report_id": "report_xxxx",
                ...
            }
        }
    """
    try:
        report = ReportManager.get_report_by_simulation(simulation_id)
        
        if not report:
            return jsonify({
                "success": False,
                "error": f"该模拟暂无报告: {simulation_id}",
                "has_report": False
            }), 404
        
        return jsonify({
            "success": True,
            "data": report.to_dict(),
            "has_report": True
        })
        
    except Exception as e:
        logger.error(f"获取报告失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/list', methods=['GET'])
def list_reports():
    """
    列出所有报告
    
    Query参数：
        simulation_id: 按模拟ID过滤（可选）
        limit: 返回数量限制（默认50）
    
    返回：
        {
            "success": true,
            "data": [...],
            "count": 10
        }
    """
    try:
        simulation_id = request.args.get('simulation_id')
        limit = request.args.get('limit', 50, type=int)
        
        reports = ReportManager.list_reports(
            simulation_id=simulation_id,
            limit=limit
        )
        
        return jsonify({
            "success": True,
            "data": [r.to_dict() for r in reports],
            "count": len(reports)
        })
        
    except Exception as e:
        logger.error(f"列出报告失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/<report_id>/download', methods=['GET'])
def download_report(report_id: str):
    """
    下载报告（Markdown格式）
    
    返回Markdown文件
    """
    try:
        report = ReportManager.get_report(report_id)
        
        if not report:
            return jsonify({
                "success": False,
                "error": f"报告不存在: {report_id}"
            }), 404
        
        md_path = ReportManager._get_report_markdown_path(report_id)
        
        if not os.path.exists(md_path):
            # 如果MD文件不存在，生成一个临时文件
            import tempfile
            with tempfile.NamedTemporaryFile(mode='w', suffix='.md', delete=False) as f:
                f.write(report.markdown_content)
                temp_path = f.name
            
            return send_file(
                temp_path,
                as_attachment=True,
                download_name=f"{report_id}.md"
            )
        
        return send_file(
            md_path,
            as_attachment=True,
            download_name=f"{report_id}.md"
        )
        
    except Exception as e:
        logger.error(f"下载报告失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/<report_id>', methods=['DELETE'])
def delete_report(report_id: str):
    """删除报告"""
    try:
        success = ReportManager.delete_report(report_id)
        
        if not success:
            return jsonify({
                "success": False,
                "error": f"报告不存在: {report_id}"
            }), 404
        
        return jsonify({
            "success": True,
            "message": f"报告已删除: {report_id}"
        })
        
    except Exception as e:
        logger.error(f"删除报告失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


# ============== Report Agent对话接口 ==============

@report_bp.route('/chat', methods=['POST'])
def chat_with_report_agent():
    """
    与Report Agent对话
    
    Report Agent可以在对话中自主调用检索工具来回答问题
    
    请求（JSON）：
        {
            "simulation_id": "sim_xxxx",        // 必填，模拟ID
            "message": "请解释一下舆情走向",    // 必填，用户消息
            "chat_history": [                   // 可选，对话历史
                {"role": "user", "content": "..."},
                {"role": "assistant", "content": "..."}
            ]
        }
    
    返回：
        {
            "success": true,
            "data": {
                "response": "Agent回复...",
                "tool_calls": [调用的工具列表],
                "sources": [信息来源]
            }
        }
    """
    try:
        data = request.get_json() or {}
        
        simulation_id = data.get('simulation_id')
        message = data.get('message')
        chat_history = data.get('chat_history', [])
        
        if not simulation_id:
            return jsonify({
                "success": False,
                "error": "请提供 simulation_id"
            }), 400
        
        if not message:
            return jsonify({
                "success": False,
                "error": "请提供 message"
            }), 400
        
        # 获取模拟和项目信息
        manager = SimulationManager()
        state = manager.get_simulation(simulation_id)
        
        if not state:
            return jsonify({
                "success": False,
                "error": f"模拟不存在: {simulation_id}"
            }), 404
        
        project = ProjectManager.get_project(state.project_id)
        if not project:
            return jsonify({
                "success": False,
                "error": f"项目不存在: {state.project_id}"
            }), 404
        
        graph_id = state.graph_id or project.graph_id
        if not graph_id:
            return jsonify({
                "success": False,
                "error": "缺少图谱ID"
            }), 400
        
        simulation_requirement = project.simulation_requirement or ""
        
        # 创建Agent并进行对话
        agent = ReportAgent(
            graph_id=graph_id,
            simulation_id=simulation_id,
            simulation_requirement=simulation_requirement
        )
        
        result = agent.chat(message=message, chat_history=chat_history)
        
        return jsonify({
            "success": True,
            "data": result
        })
        
    except Exception as e:
        logger.error(f"对话失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


# ============== 报告进度与分章节接口 ==============

@report_bp.route('/<report_id>/progress', methods=['GET'])
def get_report_progress(report_id: str):
    """
    获取报告生成进度（实时）
    
    返回：
        {
            "success": true,
            "data": {
                "status": "generating",
                "progress": 45,
                "message": "正在生成章节: 关键发现",
                "current_section": "关键发现",
                "completed_sections": ["执行摘要", "模拟背景"],
                "updated_at": "2025-12-09T..."
            }
        }
    """
    try:
        progress = ReportManager.get_progress(report_id)
        
        if not progress:
            return jsonify({
                "success": False,
                "error": f"报告不存在或进度信息不可用: {report_id}"
            }), 404
        
        return jsonify({
            "success": True,
            "data": progress
        })
        
    except Exception as e:
        logger.error(f"获取报告进度失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/<report_id>/sections', methods=['GET'])
def get_report_sections(report_id: str):
    """
    获取已生成的章节列表（分章节输出）
    
    前端可以轮询此接口获取已生成的章节内容，无需等待整个报告完成
    
    返回：
        {
            "success": true,
            "data": {
                "report_id": "report_xxxx",
                "sections": [
                    {
                        "filename": "section_01.md",
                        "section_index": 1,
                        "content": "## 执行摘要\\n\\n..."
                    },
                    ...
                ],
                "total_sections": 3,
                "is_complete": false
            }
        }
    """
    try:
        sections = ReportManager.get_generated_sections(report_id)
        
        # 获取报告状态
        report = ReportManager.get_report(report_id)
        is_complete = report is not None and report.status == ReportStatus.COMPLETED
        
        return jsonify({
            "success": True,
            "data": {
                "report_id": report_id,
                "sections": sections,
                "total_sections": len(sections),
                "is_complete": is_complete
            }
        })
        
    except Exception as e:
        logger.error(f"获取章节列表失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/<report_id>/section/<int:section_index>', methods=['GET'])
def get_single_section(report_id: str, section_index: int):
    """
    获取单个章节内容
    
    返回：
        {
            "success": true,
            "data": {
                "filename": "section_01.md",
                "content": "## 执行摘要\\n\\n..."
            }
        }
    """
    try:
        section_path = ReportManager._get_section_path(report_id, section_index)
        
        if not os.path.exists(section_path):
            return jsonify({
                "success": False,
                "error": f"章节不存在: section_{section_index:02d}.md"
            }), 404
        
        with open(section_path, 'r', encoding='utf-8') as f:
            content = f.read()
        
        return jsonify({
            "success": True,
            "data": {
                "filename": f"section_{section_index:02d}.md",
                "section_index": section_index,
                "content": content
            }
        })
        
    except Exception as e:
        logger.error(f"获取章节内容失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


# ============== 报告状态检查接口 ==============

@report_bp.route('/check/<simulation_id>', methods=['GET'])
def check_report_status(simulation_id: str):
    """
    检查模拟是否有报告，以及报告状态
    
    用于前端判断是否解锁Interview功能
    
    返回：
        {
            "success": true,
            "data": {
                "simulation_id": "sim_xxxx",
                "has_report": true,
                "report_status": "completed",
                "report_id": "report_xxxx",
                "interview_unlocked": true
            }
        }
    """
    try:
        report = ReportManager.get_report_by_simulation(simulation_id)
        
        has_report = report is not None
        report_status = report.status.value if report else None
        report_id = report.report_id if report else None
        
        # 只有报告完成后才解锁interview
        interview_unlocked = has_report and report.status == ReportStatus.COMPLETED
        
        return jsonify({
            "success": True,
            "data": {
                "simulation_id": simulation_id,
                "has_report": has_report,
                "report_status": report_status,
                "report_id": report_id,
                "interview_unlocked": interview_unlocked
            }
        })
        
    except Exception as e:
        logger.error(f"检查报告状态失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


# ============== 工具调用接口（供调试使用）==============

@report_bp.route('/tools/search', methods=['POST'])
def search_graph_tool():
    """
    图谱搜索工具接口（供调试使用）
    
    请求（JSON）：
        {
            "graph_id": "mirofish_xxxx",
            "query": "搜索查询",
            "limit": 10
        }
    """
    try:
        data = request.get_json() or {}
        
        graph_id = data.get('graph_id')
        query = data.get('query')
        limit = data.get('limit', 10)
        
        if not graph_id or not query:
            return jsonify({
                "success": False,
                "error": "请提供 graph_id 和 query"
            }), 400
        
        from ..services.zep_tools import ZepToolsService
        
        tools = ZepToolsService()
        result = tools.search_graph(
            graph_id=graph_id,
            query=query,
            limit=limit
        )
        
        return jsonify({
            "success": True,
            "data": result.to_dict()
        })
        
    except Exception as e:
        logger.error(f"图谱搜索失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500


@report_bp.route('/tools/statistics', methods=['POST'])
def get_graph_statistics_tool():
    """
    图谱统计工具接口（供调试使用）
    
    请求（JSON）：
        {
            "graph_id": "mirofish_xxxx"
        }
    """
    try:
        data = request.get_json() or {}
        
        graph_id = data.get('graph_id')
        
        if not graph_id:
            return jsonify({
                "success": False,
                "error": "请提供 graph_id"
            }), 400
        
        from ..services.zep_tools import ZepToolsService
        
        tools = ZepToolsService()
        result = tools.get_graph_statistics(graph_id)
        
        return jsonify({
            "success": True,
            "data": result
        })
        
    except Exception as e:
        logger.error(f"获取图谱统计失败: {str(e)}")
        return jsonify({
            "success": False,
            "error": str(e),
            "traceback": traceback.format_exc()
        }), 500