import sys
import os
from PySide6.QtWidgets import QApplication, QMessageBox, QMainWindow
from PySide6.QtCore import QThread, Signal
from ui import UiCreator
from api import load_config, save_config, upload_file, get_file_info

class UploadThread(QThread):
    finished = Signal(dict)
    error = Signal(str)
    progress = Signal(int)
    
    def __init__(self, filepath, expiry, server_url):
        super().__init__()
        self.filepath = filepath
        self.expiry = expiry
        self.server_url = server_url
    
    def run(self):
        try:
            self.progress.emit(50)
            result = upload_file(self.filepath, self.expiry, self.server_url)
            self.progress.emit(100)
            self.finished.emit(result)
        except Exception as e:
            self.error.emit(str(e))

class MainWindow:
    def __init__(self):
        self.app = QApplication(sys.argv)
        self.window = QMainWindow()
        
        config = load_config()
        self.server_url = config.get('server_url', 'http://localhost:5000')
        self.selected_file = None
        self.upload_thread = None
        
        central = UiCreator.create_main_ui(self.window)
        
        self.window.server_input.setText(self.server_url)
        self.window.save_btn.clicked.connect(self.save_server_config)
        self.window.upload_btn.clicked.connect(self.start_upload)
        self.window.copy_btn.clicked.connect(self.copy_result)
        
        self.window.drop_zone.file_dropped.connect(self.on_file_selected)
    
    def save_server_config(self):
        self.server_url = self.window.server_input.text().strip()
        config = {"server_url": self.server_url, "default_expiry": "24h"}
        save_config(config)
        self.window.status_label.setText("状态: 配置已保存")
    
    def on_file_selected(self, filepath):
        self.selected_file = filepath
        filename = os.path.basename(filepath)
        self.window.drop_label.setText(f"已选择: {filename}")
        self.window.status_label.setText(f"状态: 已选择文件: {filename}")
    
    def start_upload(self):
        if not self.selected_file:
            self.window.status_label.setText("状态: 请先选择文件")
            return

        if self.upload_thread is not None and self.upload_thread.isRunning():
            self.window.status_label.setText("状态: 上传进行中，请等待")
            return

        expiry = self.window.expiry_combo.currentText()
        self.window.progress_bar.setVisible(True)
        self.window.upload_btn.setEnabled(False)
        self.window.status_label.setText("状态: 上传中...")

        self.upload_thread = UploadThread(self.selected_file, expiry, self.server_url)
        self.upload_thread.finished.connect(self.on_upload_success)
        self.upload_thread.finished.connect(self.upload_thread.deleteLater)
        self.upload_thread.error.connect(self.on_upload_error)
        self.upload_thread.progress.connect(self.window.progress_bar.setValue)
        self.upload_thread.start()
    
    def on_upload_success(self, result):
        self.window.progress_bar.setVisible(False)
        self.window.upload_btn.setEnabled(True)
        
        share_url = result.get('share_url', '')
        file_id = result.get('id', '')
        filename = result.get('filename', '')
        filesize = result.get('filesize', 0)
        
        result_text = f"✅ 上传成功!\n\n文件: {filename}\n大小: {filesize:,} 字节\n\n分享链接:\n{share_url}\n\n文件ID: {file_id}"
        self.window.result_area.setPlainText(result_text)
        self.window.result_area.setVisible(True)
        self.window.copy_btn.setVisible(True)
        self.window.share_url = share_url
        self.window.status_label.setText("状态: 上传完成")
    
    def on_upload_error(self, error_msg):
        self.window.progress_bar.setVisible(False)
        self.window.upload_btn.setEnabled(True)
        self.window.status_label.setText(f"状态: 上传失败")
        QMessageBox.critical(self.window, "上传失败", error_msg)
    
    def copy_result(self):
        if hasattr(self.window, 'share_url'):
            clipboard = self.app.clipboard()
            clipboard.setText(self.window.share_url)
            self.window.status_label.setText("状态: 链接已复制到剪贴板")
    
    def run(self):
        self.window.show()
        sys.exit(self.app.exec())

if __name__ == '__main__':
    MainWindow().run()