"""
全局聊天记录浏览窗口
"""
from PyQt5.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QLabel,
    QListWidget, QListWidgetItem, QTextEdit,
    QSplitter, QFrame, QPushButton, QComboBox
)
from PyQt5.QtCore import Qt, pyqtSignal
from PyQt5.QtGui import QColor
import html
from datetime import datetime


class HistoryWindow(QWidget):
    refresh_requested = pyqtSignal()
    search_requested = pyqtSignal(str)  # keyword

    def __init__(self, username, parent=None):
        super().__init__(parent)
        self.username = username
        self.all_messages = []
        self._init_ui()

    def _init_ui(self):
        self.setWindowTitle("聊天记录浏览器")
        self.setGeometry(150, 150, 900, 650)
        self.setMinimumSize(650, 450)

        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(0)

        # 顶部工具栏
        toolbar = QFrame()
        toolbar.setStyleSheet("QFrame { background: #f8fafc; border-bottom: 1px solid #e2e8f0; }")
        tl = QHBoxLayout(toolbar)
        tl.setContentsMargins(14, 8, 14, 8)
        tl.setSpacing(8)

        title = QLabel("📜 聊天记录")
        title.setStyleSheet("font-size: 15px; font-weight: bold; color: #1e293b;")
        tl.addWidget(title)

        # 分类筛选
        self.filter_combo = QComboBox()
        self.filter_combo.addItems(["全部消息", "私聊消息", "群聊消息"])
        self.filter_combo.setStyleSheet("""
            QComboBox { padding: 4px 10px; border: 1px solid #ddd;
                        border-radius: 5px; background: white; font-size: 12px; }
        """)
        self.filter_combo.currentIndexChanged.connect(self._apply_filter)
        tl.addWidget(self.filter_combo)

        tl.addStretch()

        refresh_btn = QPushButton("🔄 刷新")
        refresh_btn.setStyleSheet("""
            QPushButton { padding: 5px 14px; border: 1px solid #ddd;
                         border-radius: 5px; background: white; font-size: 12px; }
            QPushButton:hover { background: #f0f0f0; }
        """)
        refresh_btn.clicked.connect(self.refresh_requested.emit)
        tl.addWidget(refresh_btn)

        layout.addWidget(toolbar)

        # 主区域
        splitter = QSplitter(Qt.Horizontal)

        # 左侧消息列表
        left_frame = QFrame()
        left_frame.setStyleSheet("QFrame { background: white; }")
        ll = QVBoxLayout(left_frame)
        ll.setContentsMargins(0, 0, 0, 0)
        ll.setSpacing(0)

        self.msg_list = QListWidget()
        self.msg_list.setStyleSheet("""
            QListWidget { border: none; background: white; outline: none; }
            QListWidget::item { padding: 8px 12px; border-bottom: 1px solid #f1f5f9; font-size: 12px; }
            QListWidget::item:hover { background: #f8fafc; }
            QListWidget::item:selected { background: #eef2ff; }
        """)
        self.msg_list.itemClicked.connect(self._show_detail)
        ll.addWidget(self.msg_list)
        splitter.addWidget(left_frame)

        # 右侧详情
        right_frame = QFrame()
        right_frame.setStyleSheet("QFrame { background: #fafbfc; }")
        rl = QVBoxLayout(right_frame)
        rl.setContentsMargins(0, 0, 0, 0)
        rl.setSpacing(0)

        detail_header = QWidget()
        detail_header.setFixedHeight(36)
        detail_header.setStyleSheet("background: #fafafa; border-bottom: 1px solid #eee;")
        dhl = QHBoxLayout(detail_header)
        dhl.setContentsMargins(12, 0, 12, 0)
        dhl.addWidget(QLabel("消息详情"))
        rl.addWidget(detail_header)

        self.detail_view = QTextEdit()
        self.detail_view.setReadOnly(True)
        self.detail_view.setStyleSheet("""
            QTextEdit { border: none; background: #fafbfc;
                       font-size: 13px; line-height: 1.6; padding: 14px; }
        """)
        self.detail_view.setPlaceholderText("选择左侧一条消息查看详情...")
        rl.addWidget(self.detail_view)
        splitter.addWidget(right_frame)

        splitter.setSizes([350, 550])
        layout.addWidget(splitter)

    def load_messages(self, messages):
        """加载消息列表"""
        self.all_messages = messages
        self._apply_filter()

    def _apply_filter(self):
        self.msg_list.clear()
        filter_idx = self.filter_combo.currentIndex()

        filtered = self.all_messages
        if filter_idx == 1:  # 私聊
            filtered = [m for m in self.all_messages if m.get('chat_type') == 'private']
        elif filter_idx == 2:  # 群聊
            filtered = [m for m in self.all_messages if m.get('chat_type') == 'group']

        for msg in filtered:
            self._add_list_item(msg)

    def _add_list_item(self, msg):
        sender = msg.get('sender', '?')
        content = msg.get('content', '')
        timestamp = msg.get('timestamp', '')
        chat_type = msg.get('chat_type', 'private')
        target = msg.get('target_name', '')
        msg_type = msg.get('msg_type', 'text')
        icon = "👥" if chat_type == 'group' else "💬"

        if msg_type == 'image':
            preview = '[图片]'
        else:
            preview = content[:50] + '...' if len(content) > 50 else content
        time_short = timestamp.split(' ')[-1][:5] if ' ' in timestamp else timestamp[:5]
        text = f"{icon} {sender} → {target}  {time_short}\n   {preview}"

        item = QListWidgetItem(text)
        item.setData(Qt.UserRole, msg)
        self.msg_list.addItem(item)

    def _show_detail(self, item):
        msg = item.data(Qt.UserRole)
        if not msg:
            return

        sender = msg.get('sender', '?')
        content = msg.get('content', '')
        timestamp = msg.get('timestamp', '')
        chat_type = msg.get('chat_type', 'private')
        target = msg.get('target_name', '?')
        msg_type = msg.get('msg_type', 'text')
        type_label = "群聊" if chat_type == 'group' else "私聊"

        if msg_type == 'image':
            content_html = f'<div style="font-size: 14px; color: #6366f1;">[图片消息]</div>'
        else:
            content_html = f'<div style="font-size: 14px; line-height: 1.7; color: #333;">{html.escape(content)}</div>'

        detail_html = f"""
        <div style="font-family: 'Microsoft YaHei', sans-serif;">
            <div style="background: #eef2ff; padding: 10px 14px; border-radius: 8px; margin-bottom: 12px;">
                <table style="width:100%; font-size: 13px;">
                    <tr><td style="color:#6366f1; width:60px;"><b>发送者：</b></td><td>{html.escape(sender)}</td></tr>
                    <tr><td style="color:#6366f1;"><b>类型：</b></td><td>{type_label}</td></tr>
                    <tr><td style="color:#6366f1;"><b>对象：</b></td><td>{html.escape(target)}</td></tr>
                    <tr><td style="color:#6366f1;"><b>时间：</b></td><td>{html.escape(timestamp)}</td></tr>
                </table>
            </div>
            <div style="background: white; padding: 14px; border-radius: 8px; border: 1px solid #e0e0e0;">
                <b style="color:#1e293b;">消息内容：</b><br><br>
                {content_html}
            </div>
        </div>
        """
        self.detail_view.setHtml(detail_html)

    def closeEvent(self, event):
        self.all_messages.clear()
        event.accept()