"""
代码生成控件
集成在主窗口的标签页中
"""
from PyQt5.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QPushButton,
    QGroupBox, QFormLayout, QComboBox, QLineEdit,
    QLabel, QMessageBox, QFileDialog, QTextEdit
)
from PyQt5.QtCore import Qt

from controllers.codegen_controller import CodeGenController
from controllers.message_controller import MessageController
from config import ProtocolType, SerializationType, LanguageStandard
from utils.logger import get_logger

logger = get_logger(__name__)


class CodeGenWidget(QWidget):
    """代码生成控件"""

    def __init__(self, codegen_controller: CodeGenController,
                 message_controller: MessageController):
        super().__init__()
        self.codegen_controller = codegen_controller
        self.message_controller = message_controller

        self.source_message = None
        self.target_message = None

        self.init_ui()

    def init_ui(self):
        """初始化UI"""
        main_layout = QVBoxLayout(self)

        # 配置区域
        config_group = QGroupBox("生成配置")
        config_layout = QFormLayout(config_group)

        # 源消息选择
        source_layout = QHBoxLayout()
        self.source_message_combo = QComboBox()
        self.load_messages_to_combo(self.source_message_combo)
        self.source_message_combo.currentIndexChanged.connect(self.on_source_message_changed)
        source_layout.addWidget(self.source_message_combo)
        config_layout.addRow("源消息*:", source_layout)

        # 目标消息选择
        target_layout = QHBoxLayout()
        self.target_message_combo = QComboBox()
        self.load_messages_to_combo(self.target_message_combo)
        self.target_message_combo.currentIndexChanged.connect(self.on_target_message_changed)
        target_layout.addWidget(self.target_message_combo)
        config_layout.addRow("目标消息*:", target_layout)

        # 协议选择
        self.protocol_combo = QComboBox()
        for protocol in ProtocolType:
            self.protocol_combo.addItem(protocol.value, protocol)
        config_layout.addRow("传输协议*:", self.protocol_combo)

        # 序列化格式
        self.serialization_combo = QComboBox()
        for serialization in SerializationType:
            self.serialization_combo.addItem(serialization.value, serialization)
        config_layout.addRow("序列化格式*:", self.serialization_combo)

        # 语言标准
        self.language_standard_combo = QComboBox()
        for standard in LanguageStandard:
            self.language_standard_combo.addItem(standard.value, standard)
        config_layout.addRow("语言标准:", self.language_standard_combo)

        # 输出目录
        output_layout = QHBoxLayout()
        self.output_dir_edit = QLineEdit()
        self.browse_btn = QPushButton("浏览...")
        self.browse_btn.clicked.connect(self.on_browse_output_dir)
        output_layout.addWidget(self.output_dir_edit)
        output_layout.addWidget(self.browse_btn)
        config_layout.addRow("输出目录:", output_layout)

        main_layout.addWidget(config_group)

        # 操作按钮
        button_layout = QHBoxLayout()

        self.generate_btn = QPushButton("生成代码")
        self.generate_btn.clicked.connect(self.on_generate_code)

        self.preview_btn = QPushButton("预览代码")
        self.preview_btn.clicked.connect(self.on_preview_code)

        button_layout.addWidget(self.generate_btn)
        button_layout.addWidget(self.preview_btn)
        button_layout.addStretch()

        main_layout.addLayout(button_layout)

        # 日志区域
        log_group = QGroupBox("生成日志")
        log_layout = QVBoxLayout(log_group)

        self.log_text = QTextEdit()
        self.log_text.setReadOnly(True)
        self.log_text.setMaximumHeight(200)
        log_layout.addWidget(self.log_text)

        main_layout.addWidget(log_group)
        main_layout.addStretch()

    def load_messages_to_combo(self, combo: QComboBox):
        """加载消息到下拉框"""
        messages, _ = self.message_controller.get_all_messages(page=1, page_size=1000)

        combo.clear()
        combo.addItem("请选择...", None)
        for message in messages:
            combo.addItem(message.full_name, message)

    def on_source_message_changed(self, index):
        """源消息改变"""
        self.source_message = self.source_message_combo.currentData()

    def on_target_message_changed(self, index):
        """目标消息改变"""
        self.target_message = self.target_message_combo.currentData()

    def on_browse_output_dir(self):
        """浏览输出目录"""
        dir_path = QFileDialog.getExistingDirectory(
            self,
            "选择输出目录",
            "",
            QFileDialog.ShowDirsOnly
        )

        if dir_path:
            self.output_dir_edit.setText(dir_path)

    def on_generate_code(self):
        """生成代码"""
        # 验证
        if not self.source_message or not self.target_message:
            QMessageBox.warning(self, "警告", "请选择源消息和目标消息")
            return

        if not self.output_dir_edit.text().strip():
            QMessageBox.warning(self, "警告", "请选择输出目录")
            return

        # 构建配置
        config = {
            'source_message': self.source_message,
            'target_message': self.target_message,
            'protocol': self.protocol_combo.currentData().value,
            'serialization': self.serialization_combo.currentData().value,
            'language_standard': self.language_standard_combo.currentData().value,
            'output_dir': self.output_dir_edit.text().strip()
        }

        # 生成代码
        self.log_text.append("开始生成代码...")
        success, msg, files = self.codegen_controller.generate_code(config)

        if success:
            self.log_text.append(f"✓ {msg}")
            self.log_text.append(f"生成文件列表:")
            for filename in files.keys():
                self.log_text.append(f"  - {filename}")

            QMessageBox.information(self, "成功", msg)
        else:
            self.log_text.append(f"✗ {msg}")
            QMessageBox.warning(self, "失败", msg)

    def on_preview_code(self):
        """预览代码"""
        from ui.dialogs.codegen_dialog import CodeGenDialog

        dialog = CodeGenDialog(self, self.source_message, self.target_message)
        dialog.exec_()