"""
EGM 输电线路绕击跳闸率计算程序 - Pywebview 界面
使用 Vue 3 + Quasar + TypeScript + Tailwind CSS 作为前端
"""

import os
import sys
import json
import math
import threading
from pathlib import Path
from typing import Dict, Any, List
from datetime import datetime
import webview
from loguru import logger

# 添加项目根目录到路径
project_root = Path(__file__).parent
sys.path.insert(0, str(project_root))

from core import para
from main import parameter_display, run_egm


class WebHandler:
    """Web日志处理器"""
    def __init__(self, callback=None):
        self.callback = callback
        self.logs: List[Dict[str, str]] = []

    def write(self, message):
        if message.strip():
            log_entry = {
                "level": "info",
                "time": datetime.now().strftime("%H:%M:%S"),
                "message": message.strip()
            }
            self.logs.append(log_entry)
            if self.callback:
                self.callback(log_entry)


class LoguruWebHandler:
    """Loguru 日志处理器，将 loguru 日志转发到 Web 界面"""

    def __init__(self, app: 'EGMWebApp'):
        self.app = app

    def write(self, message):
        """loguru handler 的写入方法"""
        record = message.record
        level = record['level'].name.lower()

        # 映射 loguru 级别到前端级别
        level_map = {
            'trace': 'debug',
            'debug': 'debug',
            'info': 'info',
            'success': 'info',
            'warning': 'warning',
            'error': 'error',
            'critical': 'error'
        }
        frontend_level = level_map.get(level, 'info')

        # 提取消息文本
        msg = record['message']
        if msg.strip():
            self.app.add_log(frontend_level, msg)


class EGMWebApp:
    """EGM 计算程序的 Web 界面后端"""

    def __init__(self):
        self.window = None
        self.web_handler = None
        self.logs: List[Dict[str, str]] = []
        self._loguru_handler_id = None

    def add_log(self, level: str, message: str):
        """添加日志并实时推送到前端"""
        log_entry = {
            "level": level,
            "time": datetime.now().strftime("%H:%M:%S"),
            "message": message
        }
        self.logs.append(log_entry)

        # 实时推送到前端
        if self.window:
            try:
                import json
                js_code = f'if(window.addLogFromBackend){{window.addLogFromBackend({json.dumps(log_entry)})}}'
                self.window.evaluate_js(js_code)
            except Exception as e:
                logger.error(f"推送日志到前端失败: {e}")

    def get_logs(self) -> List[Dict[str, str]]:
        """获取日志列表"""
        logs = self.logs.copy()
        self.logs = []
        return logs

    def _setup_loguru_handler(self):
        """设置 loguru 处理器，捕获所有 logger 调用"""
        self._loguru_handler_id = logger.add(
            LoguruWebHandler(self),
            format="{message}",
            level="DEBUG"
        )

    def _remove_loguru_handler(self):
        """移除 loguru 处理器"""
        if self._loguru_handler_id is not None:
            logger.remove(self._loguru_handler_id)
            self._loguru_handler_id = None

    def calculate(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        执行 EGM 计算（启动后台线程，立即返回）

        Args:
            params: 包含 parameter, advance, optional 的字典

        Returns:
            计算状态字典
        """
        self.logs = []  # 清空日志

        # 启动后台线程执行计算
        thread = threading.Thread(target=self._calculate_thread, args=(params,))
        thread.daemon = True
        thread.start()

        return {"status": "started", "message": "计算已启动"}

    def _calculate_thread(self, params: Dict[str, Any]):
        """后台线程中执行计算"""
        # 设置 loguru 处理器，捕获所有 logger.info/debug 等调用
        self._setup_loguru_handler()

        self.add_log("info", "开始 EGM 计算...")

        try:
            # 解析参数
            parameter_data = params.get('parameter', {})
            advance_data = params.get('advance', {})
            optional_data = params.get('optional', {})

            # 更新全局参数对象
            para.h_g_sag = float(parameter_data.get('h_g_sag', 11.67))
            para.h_c_sag = float(parameter_data.get('h_c_sag', 14.43))
            para.td = int(parameter_data.get('td', 20))
            para.insulator_c_len = float(parameter_data.get('insulator_c_len', 7.02))
            para.string_c_len = float(parameter_data.get('string_c_len', 9.2))
            para.string_g_len = float(parameter_data.get('string_g_len', 0.5))
            para.gc_x = list(parameter_data.get('gc_x', [17.9, 17]))
            para.ground_angels = [
                angel / 180 * math.pi
                for angel in parameter_data.get('ground_angels', [0])
            ]
            para.h_arm = list(parameter_data.get('h_arm', [150, 130]))
            para.altitude = int(parameter_data.get('altitude', 1000))
            # 解析电压等级字符串，如 "500kV" -> 500
            rated_voltage_str = str(parameter_data.get('rated_voltage', '500kV'))
            para.rated_voltage = float(rated_voltage_str.replace('kV', '').replace('±', ''))

            para.ng = float(advance_data.get('ng', -1))
            para.Ip_a = float(advance_data.get('Ip_a', -1))
            para.Ip_b = float(advance_data.get('Ip_b', -1))

            para.voltage_n = int(optional_data.get('voltage_n', 3))
            para.max_i = float(optional_data.get('max_i', 200))

            # 设置 ac_or_dc 参数
            ac_or_dc_value = str(parameter_data.get('ac_or_dc', 'AC'))
            para.ac_or_dc = 'DC' if 'DC' in ac_or_dc_value.upper() else 'AC'

            # 调用 main.py 的参数显示函数，日志会被 loguru handler 捕获
            parameter_display(para)

            logger.info("开始执行 EGM 计算...")

            # 调用 main.py 的核心计算函数
            result = run_egm()

            self.add_log("info", "EGM 计算完成")

            # 推送结果到前端
            self._send_result_to_frontend(result)

            # 移除 loguru 处理器
            self._remove_loguru_handler()

        except Exception as e:
            self.add_log("error", f"计算失败: {str(e)}")
            import traceback
            traceback.print_exc()

            # 移除 loguru 处理器
            self._remove_loguru_handler()

            # 推送错误到前端
            self._send_result_to_frontend({
                "success": False,
                "message": f"计算失败: {str(e)}",
                "error": str(e)
            })

    def _send_result_to_frontend(self, result: Dict[str, Any]):
        """将计算结果推送到前端"""
        if self.window:
            try:
                js_code = f'if(window.receiveResult){{window.receiveResult({json.dumps(result)})}}'
                self.window.evaluate_js(js_code)
            except Exception as e:
                logger.error(f"推送结果到前端失败: {e}")

    def dict_to_toml(self, obj: Dict[str, Any], indent: str = '') -> str:
        """
        将字典转换为 TOML 格式字符串
        
        Args:
            obj: 参数字典
            indent: 缩进字符串
            
        Returns:
            TOML 格式字符串
        """
        result = ''
        
        for key, value in obj.items():
            if value is None:
                continue
            
            if isinstance(value, list):
                result += f'{indent}{key} = [{", ".join(str(v) for v in value)}]\n'
            elif isinstance(value, dict):
                result += f'\n{indent}[{key}]\n'
                result += self.dict_to_toml(value, indent)
            elif isinstance(value, str):
                result += f'{indent}{key} = "{value}"\n'
            elif isinstance(value, bool):
                result += f'{indent}{key} = {str(value).lower()}\n'
            else:
                result += f'{indent}{key} = {value}\n'
        
        return result

    def export_config(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        导出配置为 TOML 文件，弹出保存对话框

        Args:
            params: 参数字典

        Returns:
            包含保存状态和路径的字典
        """
        try:
            # 生成默认文件名
            timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
            default_filename = f'egm_config_{timestamp}.toml'
            
            # 打开保存文件对话框
            result = self.window.create_file_dialog(
                webview.SAVE_DIALOG,
                directory='',
                save_filename=default_filename,
                file_types=('TOML Files (*.toml)', 'All files (*.*)')
            )
            
            if result and len(result) > 0:
                file_path = result[0]
                
                # 转换为 TOML 格式
                toml_content = self.dict_to_toml(params)
                
                # 写入文件
                with open(file_path, 'w', encoding='utf-8') as f:
                    f.write(toml_content)
                
                return {
                    "success": True,
                    "message": f"配置已保存到: {file_path}",
                    "file_path": file_path
                }
            else:
                return {
                    "success": False,
                    "message": "用户取消了保存操作"
                }
        except Exception as e:
            logger.error(f"导出配置失败: {str(e)}")
            return {
                "success": False,
                "message": f"保存失败: {str(e)}"
            }

    def get_default_config(self) -> Dict[str, Any]:
        """
        获取默认配置

        Returns:
            默认配置字典
        """
        return {
            "parameter": {
                "rated_voltage": 750,
                "h_c_sag": 14.43,
                "h_g_sag": 11.67,
                "insulator_c_len": 7.02,
                "string_c_len": 9.2,
                "string_g_len": 0.5,
                "h_arm": [150, 130],
                "gc_x": [17.9, 17],
                "ground_angels": [0],
                "altitude": 1000,
                "td": 20
            },
            "advance": {
                "ng": -1,
                "Ip_a": -1,
                "Ip_b": -1
            },
            "optional": {
                "voltage_n": 3,
                "max_i": 200
            }
        }


def start_webview():
    """启动 pywebview 界面"""

    # 确定前端 URL
    # 在开发环境中使用 Vite 开发服务器
    # 在生产环境中使用构建后的文件
    dev_mode = os.getenv('EGM_DEV_MODE', 'true').lower() == 'true'

    if dev_mode:
        # 开发模式：使用 Vite 开发服务器
        url = 'http://localhost:5173'
        logger.info(f"开发模式：使用 Vite 开发服务器 {url}")
        logger.info("请先在 webui 目录中运行: npm install && npm run dev")
    else:
        # 生产模式：使用构建后的文件
        dist_path = project_root / 'webui' / 'dist'
        if not dist_path.exists():
            logger.error(f"构建目录不存在: {dist_path}")
            logger.error("请先运行: cd webui && npm run build")
            sys.exit(1)
        url = f'file://{dist_path / "index.html"}'
        logger.info(f"生产模式：使用构建文件 {url}")

    # 创建 API 实例
    api = EGMWebApp()

    # 创建窗口
    window = webview.create_window(
        title='EGM 输电线路绕击跳闸率计算',
        url=url,
        js_api=api,
        width=1200,
        height=900,
        resizable=True,
        min_size=(800, 600)
    )
    
    # 将窗口对象传递给 API
    api.window = window

    # 启动
    logger.info("启动 EGM Web 界面...")
    webview.start(debug=dev_mode)


if __name__ == '__main__':
    # 配置日志
    logger.remove()
    logger.add(sys.stderr, level="INFO")
    logger.add("egm_webui.log", rotation="10 MB", retention="7 days")

    # 启动界面
    start_webview()