"""
历史记录视图组件
显示任务执行历史
"""

import tkinter as tk
from tkinter import ttk, messagebox
from typing import Callable, List, Optional
from pathlib import Path

from history.manager import TaskRecord, HistoryManager


class HistoryView:
    """
    历史记录视图
    
    显示任务执行历史列表，支持查看详情
    """
    
    def __init__(
        self,
        parent: tk.Widget,
        history_manager: HistoryManager,
        on_back: Callable[[], None]
    ):
        self.parent = parent
        self.history = history_manager
        self.on_back = on_back
        
        self._selected_record: Optional[TaskRecord] = None
        self._create_widgets()
    
    def _create_widgets(self):
        """创建 UI 组件"""
        self.frame = tk.Frame(self.parent, bg='#1e1e1e')
        
        # 标题栏
        title_frame = tk.Frame(self.frame, bg='#1e1e1e')
        title_frame.pack(fill=tk.X, padx=10, pady=10)
        
        # 返回按钮
        back_btn = tk.Button(
            title_frame,
            text="← 返回",
            font=('Microsoft YaHei UI', 10),
            bg='#424242',
            fg='white',
            activebackground='#616161',
            activeforeground='white',
            relief=tk.FLAT,
            padx=10,
            cursor='hand2',
            command=self.on_back
        )
        back_btn.pack(side=tk.LEFT)
        
        # 标题
        title_label = tk.Label(
            title_frame,
            text="📜 任务历史记录",
            font=('Microsoft YaHei UI', 14, 'bold'),
            fg='#ce93d8',
            bg='#1e1e1e'
        )
        title_label.pack(side=tk.LEFT, padx=20)
        
        # 统计信息
        stats = self.history.get_stats()
        stats_text = f"共 {stats['total']} 条 | 成功 {stats['success']} | 失败 {stats['failed']} | 成功率 {stats['success_rate']:.0%}"
        stats_label = tk.Label(
            title_frame,
            text=stats_text,
            font=('Microsoft YaHei UI', 9),
            fg='#888888',
            bg='#1e1e1e'
        )
        stats_label.pack(side=tk.RIGHT)
        
        # 主内容区域（左右分栏）
        content_frame = tk.Frame(self.frame, bg='#1e1e1e')
        content_frame.pack(fill=tk.BOTH, expand=True, padx=10, pady=(0, 10))
        
        # 左侧：历史列表
        list_frame = tk.LabelFrame(
            content_frame,
            text=" 任务列表 ",
            font=('Microsoft YaHei UI', 10, 'bold'),
            fg='#4fc3f7',
            bg='#1e1e1e',
            relief=tk.GROOVE
        )
        list_frame.pack(side=tk.LEFT, fill=tk.BOTH, expand=True, padx=(0, 5))
        
        # 列表框
        list_container = tk.Frame(list_frame, bg='#2d2d2d')
        list_container.pack(fill=tk.BOTH, expand=True, padx=3, pady=3)
        
        # 使用 Treeview 显示列表
        columns = ('time', 'input', 'status', 'duration')
        self.tree = ttk.Treeview(list_container, columns=columns, show='headings', height=15)
        
        # 配置列
        self.tree.heading('time', text='时间')
        self.tree.heading('input', text='任务描述')
        self.tree.heading('status', text='状态')
        self.tree.heading('duration', text='耗时')
        
        self.tree.column('time', width=120, minwidth=100)
        self.tree.column('input', width=250, minwidth=150)
        self.tree.column('status', width=60, minwidth=50)
        self.tree.column('duration', width=70, minwidth=50)
        
        # 滚动条
        scrollbar = ttk.Scrollbar(list_container, orient=tk.VERTICAL, command=self.tree.yview)
        self.tree.configure(yscrollcommand=scrollbar.set)
        
        scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self.tree.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
        
        # 绑定选择事件
        self.tree.bind('<<TreeviewSelect>>', self._on_select)
        
        # 右侧：详情面板
        detail_frame = tk.LabelFrame(
            content_frame,
            text=" 任务详情 ",
            font=('Microsoft YaHei UI', 10, 'bold'),
            fg='#81c784',
            bg='#1e1e1e',
            relief=tk.GROOVE
        )
        detail_frame.pack(side=tk.RIGHT, fill=tk.BOTH, expand=True, padx=(5, 0))
        
        # 详情文本框
        detail_container = tk.Frame(detail_frame, bg='#2d2d2d')
        detail_container.pack(fill=tk.BOTH, expand=True, padx=3, pady=3)
        
        self.detail_text = tk.Text(
            detail_container,
            wrap=tk.WORD,
            font=('Microsoft YaHei UI', 10),
            bg='#2d2d2d',
            fg='#d4d4d4',
            relief=tk.FLAT,
            padx=10,
            pady=10,
            state=tk.DISABLED
        )
        
        detail_scrollbar = ttk.Scrollbar(detail_container, orient=tk.VERTICAL, command=self.detail_text.yview)
        self.detail_text.configure(yscrollcommand=detail_scrollbar.set)
        
        detail_scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self.detail_text.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
        
        # 配置详情文本样式
        self.detail_text.tag_configure('title', font=('Microsoft YaHei UI', 11, 'bold'), foreground='#ffd54f')
        self.detail_text.tag_configure('label', font=('Microsoft YaHei UI', 10, 'bold'), foreground='#4fc3f7')
        self.detail_text.tag_configure('success', foreground='#81c784')
        self.detail_text.tag_configure('error', foreground='#ef5350')
        self.detail_text.tag_configure('code', font=('Consolas', 9), foreground='#ce93d8')
        
        # 底部按钮
        btn_frame = tk.Frame(self.frame, bg='#1e1e1e')
        btn_frame.pack(fill=tk.X, padx=10, pady=(0, 10))
        
        # 打开日志按钮
        self.open_log_btn = tk.Button(
            btn_frame,
            text="📄 打开日志",
            font=('Microsoft YaHei UI', 10),
            bg='#424242',
            fg='white',
            activebackground='#616161',
            activeforeground='white',
            relief=tk.FLAT,
            padx=15,
            cursor='hand2',
            state=tk.DISABLED,
            command=self._open_log
        )
        self.open_log_btn.pack(side=tk.LEFT)
        
        # 清空历史按钮
        clear_btn = tk.Button(
            btn_frame,
            text="🗑️ 清空历史",
            font=('Microsoft YaHei UI', 10),
            bg='#d32f2f',
            fg='white',
            activebackground='#f44336',
            activeforeground='white',
            relief=tk.FLAT,
            padx=15,
            cursor='hand2',
            command=self._clear_history
        )
        clear_btn.pack(side=tk.RIGHT)
        
        # 加载数据
        self._load_data()
    
    def _load_data(self):
        """加载历史数据到列表"""
        # 清空现有数据
        for item in self.tree.get_children():
            self.tree.delete(item)
        
        # 加载历史记录
        records = self.history.get_all()
        
        for record in records:
            # 截断过长的输入
            input_text = record.user_input
            if len(input_text) > 30:
                input_text = input_text[:30] + "..."
            
            status = "✓ 成功" if record.success else "✗ 失败"
            duration = f"{record.duration_ms}ms"
            
            # 提取时间（只显示时分秒）
            time_parts = record.timestamp.split(' ')
            time_str = time_parts[1] if len(time_parts) > 1 else record.timestamp
            date_str = time_parts[0] if len(time_parts) > 0 else ""
            display_time = f"{date_str}\n{time_str}"
            
            self.tree.insert('', tk.END, iid=record.task_id, values=(
                record.timestamp,
                input_text,
                status,
                duration
            ))
        
        # 显示空状态提示
        if not records:
            self._show_detail("暂无历史记录\n\n执行任务后，记录将显示在这里。")
    
    def _on_select(self, event):
        """选择记录事件"""
        selection = self.tree.selection()
        if not selection:
            return
        
        task_id = selection[0]
        record = self.history.get_by_id(task_id)
        
        if record:
            self._selected_record = record
            self._show_record_detail(record)
            self.open_log_btn.config(state=tk.NORMAL)
    
    def _show_record_detail(self, record: TaskRecord):
        """显示记录详情"""
        self.detail_text.config(state=tk.NORMAL)
        self.detail_text.delete(1.0, tk.END)
        
        # 标题
        self.detail_text.insert(tk.END, f"任务 ID: {record.task_id}\n", 'title')
        self.detail_text.insert(tk.END, f"时间: {record.timestamp}\n\n")
        
        # 用户输入
        self.detail_text.insert(tk.END, "用户输入:\n", 'label')
        self.detail_text.insert(tk.END, f"{record.user_input}\n\n")
        
        # 执行状态
        self.detail_text.insert(tk.END, "执行状态: ", 'label')
        if record.success:
            self.detail_text.insert(tk.END, "成功 ✓\n", 'success')
        else:
            self.detail_text.insert(tk.END, "失败 ✗\n", 'error')
        
        self.detail_text.insert(tk.END, f"耗时: {record.duration_ms}ms\n\n")
        
        # 执行计划
        self.detail_text.insert(tk.END, "执行计划:\n", 'label')
        plan_preview = record.execution_plan[:500] + "..." if len(record.execution_plan) > 500 else record.execution_plan
        self.detail_text.insert(tk.END, f"{plan_preview}\n\n")
        
        # 输出
        if record.stdout:
            self.detail_text.insert(tk.END, "输出:\n", 'label')
            self.detail_text.insert(tk.END, f"{record.stdout}\n\n")
        
        # 错误
        if record.stderr:
            self.detail_text.insert(tk.END, "错误:\n", 'label')
            self.detail_text.insert(tk.END, f"{record.stderr}\n", 'error')
        
        self.detail_text.config(state=tk.DISABLED)
    
    def _show_detail(self, text: str):
        """显示详情文本"""
        self.detail_text.config(state=tk.NORMAL)
        self.detail_text.delete(1.0, tk.END)
        self.detail_text.insert(tk.END, text)
        self.detail_text.config(state=tk.DISABLED)
    
    def _open_log(self):
        """打开日志文件"""
        if self._selected_record and self._selected_record.log_path:
            import os
            log_path = Path(self._selected_record.log_path)
            if log_path.exists():
                os.startfile(str(log_path))
            else:
                messagebox.showwarning("提示", f"日志文件不存在:\n{log_path}")
    
    def _clear_history(self):
        """清空历史记录"""
        result = messagebox.askyesno(
            "确认清空",
            "确定要清空所有历史记录吗？\n此操作不可恢复。",
            icon='warning'
        )
        
        if result:
            self.history.clear()
            self._load_data()
            self._show_detail("历史记录已清空")
            self.open_log_btn.config(state=tk.DISABLED)
    
    def show(self):
        """显示视图"""
        self._load_data()  # 刷新数据
        self.frame.pack(fill=tk.BOTH, expand=True)
    
    def hide(self):
        """隐藏视图"""
        self.frame.pack_forget()
    
    def get_frame(self) -> tk.Frame:
        """获取主框架"""
        return self.frame