from PySide6.QtWidgets import (QApplication, QMainWindow, QWidget, QVBoxLayout, 
                                 QHBoxLayout, QPushButton, QLabel, QLineEdit, QFileDialog,
                                 QSpinBox, QColorDialog, QTextEdit, QSlider, QDialog, QCheckBox,
                                 QScrollArea)
from PySide6.QtCore import Qt
from PySide6.QtGui import QPixmap, QImage
from PIL import Image, ImageDraw, ImageFont
import sys
import os
import time
 
class PreviewDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("去背景預覽")
        self.setModal(False)  # 非模態(tài)對話框
        layout = QVBoxLayout(self)
        
        # 預覽標簽
        self.preview_label = QLabel()
        self.preview_label.setFixedSize(300, 300)
        self.preview_label.setStyleSheet("QLabel { background-color: #808080; }")  # 灰色背景
        self.preview_label.setAlignment(Qt.AlignCenter)
        layout.addWidget(self.preview_label)
        
        # 關(guān)閉按鈕
        close_btn = QPushButton("關(guān)閉預覽")
        close_btn.clicked.connect(self.close)
        layout.addWidget(close_btn)
 
class HelpDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setWindowTitle("使用說明")
        self.setGeometry(150, 150, 600, 400)
        
        layout = QVBoxLayout(self)
        
        # 創(chuàng)建滾動區(qū)域
        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        layout.addWidget(scroll)
        
        # 創(chuàng)建內(nèi)容容器
        content = QWidget()
        scroll.setWidget(content)
        content_layout = QVBoxLayout(content)
        
        # 讀取說明文件
        try:
            with open("readme.md", "r", encoding="utf-8") as f:
                help_text = f.read()
        except:
            help_text = "找不到說明文件"
        
        # 創(chuàng)建文本顯示
        text_display = QTextEdit()
        text_display.setReadOnly(True)
        text_display.setMarkdown(help_text)
        content_layout.addWidget(text_display)
        
        # 關(guān)閉按鈕
        close_btn = QPushButton("關(guān)閉")
        close_btn.clicked.connect(self.close)
        layout.addWidget(close_btn)
 
class AdGenerator(QMainWindow):
    def __init__(self):
        super().__init__()
        # 設置默認輸出路徑
        self.output_dir = "D:\\PIC"
        # 確保輸出目錄存在
        if not os.path.exists(self.output_dir):
            try:
                os.makedirs(self.output_dir)
            except Exception as e:
                print(f"創(chuàng)建輸出目錄失敗: {str(e)}")
                self.output_dir = os.getcwd()  # 如果創(chuàng)建失敗，使用當前目錄
        
        self.initUI()
        self.product_image_path = None
        self.bg_color = (30, 30, 30)
        self.text_color = (255, 255, 255)
        self.threshold = 220  # 默認閾值
        self.preview_dialog = None
        self.current_image = None
        self.remove_bg_enabled = True  # 默認啟用去背景
        self.ad_width = 620   # 默認寬度
        self.ad_height = 420  # 默認高度
        self.help_dialog = None
        
    def initUI(self):
        self.setWindowTitle('廣告圖片生成器')
        self.setGeometry(100, 100, 800, 600)
        
        # 創(chuàng)建中心部件和布局
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        layout = QVBoxLayout(central_widget)
        
        # 創(chuàng)建預覽標簽
        self.preview_label = QLabel()
        self.preview_label.setFixedSize(620, 420)
        self.preview_label.setStyleSheet("QLabel { background-color: #1e1e1e; }")
        self.preview_label.setAlignment(Qt.AlignCenter)
        layout.addWidget(self.preview_label)
        
        # 創(chuàng)建控制面板
        controls_layout = QHBoxLayout()
        
        # 左側(cè)控制面板
        left_panel = QVBoxLayout()
        
        # 添加尺寸設置
        size_layout = QHBoxLayout()
        size_label = QLabel("廣告尺寸:")
        self.width_input = QSpinBox()
        self.width_input.setRange(300, 1920)  # 設置合理的范圍
        self.width_input.setValue(620)
        self.width_input.setSuffix(" px")
        self.width_input.valueChanged.connect(self.size_changed)
        
        size_x_label = QLabel("×")
        
        self.height_input = QSpinBox()
        self.height_input.setRange(200, 1080)
        self.height_input.setValue(420)
        self.height_input.setSuffix(" px")
        self.height_input.valueChanged.connect(self.size_changed)
        
        size_layout.addWidget(size_label)
        size_layout.addWidget(self.width_input)
        size_layout.addWidget(size_x_label)
        size_layout.addWidget(self.height_input)
        left_panel.addLayout(size_layout)
        
        # 文本輸入
        text_layout = QVBoxLayout()
        text_label = QLabel("廣告文本:")
        self.text_input = QTextEdit()
        self.text_input.setPlaceholderText("輸入廣告文本")
        self.text_input.setMaximumHeight(100)
        text_layout.addWidget(text_label)
        text_layout.addWidget(self.text_input)
        left_panel.addLayout(text_layout)
        
        # 圖片選擇按鈕
        self.select_image_btn = QPushButton("選擇產(chǎn)品圖片")
        self.select_image_btn.clicked.connect(self.select_image)
        left_panel.addWidget(self.select_image_btn)
        
        # 背景顏色選擇
        self.bg_color_btn = QPushButton("選擇背景顏色")
        self.bg_color_btn.clicked.connect(self.select_bg_color)
        left_panel.addWidget(self.bg_color_btn)
        
        # 文字顏色選擇
        self.text_color_btn = QPushButton("選擇文字顏色")
        self.text_color_btn.clicked.connect(self.select_text_color)
        left_panel.addWidget(self.text_color_btn)
        
        # 閾值選擇
        threshold_layout = QHBoxLayout()
        
        # 添加去背景開關(guān)
        self.remove_bg_checkbox = QCheckBox("啟用去背景")
        self.remove_bg_checkbox.setChecked(True)
        self.remove_bg_checkbox.stateChanged.connect(self.toggle_remove_bg)
        left_panel.addWidget(self.remove_bg_checkbox)
        
        threshold_label = QLabel("去背景閾值:")
        self.threshold_value_label = QLabel("220")
        self.threshold_slider = QSlider(Qt.Horizontal)
        self.threshold_slider.setMinimum(180)
        self.threshold_slider.setMaximum(250)
        self.threshold_slider.setValue(220)
        self.threshold_slider.valueChanged.connect(self.threshold_changed)
        
        # 添加預覽按鈕
        self.preview_btn = QPushButton("預覽去背景")
        self.preview_btn.clicked.connect(self.show_preview)
        
        threshold_layout.addWidget(threshold_label)
        threshold_layout.addWidget(self.threshold_slider)
        threshold_layout.addWidget(self.threshold_value_label)
        threshold_layout.addWidget(self.preview_btn)
        left_panel.addLayout(threshold_layout)
        
        controls_layout.addLayout(left_panel)
        
        # 右側(cè)控制面板
        right_panel = QVBoxLayout()
        
        # 添加輸出路徑設置
        output_layout = QHBoxLayout()
        output_label = QLabel("輸出路徑:")
        self.output_path_label = QLabel(self.output_dir)
        self.output_path_label.setStyleSheet("padding: 5px; background-color: #f0f0f0; border: 1px solid #ccc;")
        self.output_path_btn = QPushButton("選擇路徑")
        self.output_path_btn.clicked.connect(self.select_output_path)
        
        output_layout.addWidget(output_label)
        output_layout.addWidget(self.output_path_label, stretch=1)
        output_layout.addWidget(self.output_path_btn)
        right_panel.addLayout(output_layout)
        
        # 生成按鈕
        self.generate_btn = QPushButton("生成廣告圖片")
        self.generate_btn.clicked.connect(self.generate_ad)
        right_panel.addWidget(self.generate_btn)
        
        # 保存按鈕
        self.save_btn = QPushButton("保存圖片")
        self.save_btn.clicked.connect(self.save_image)
        right_panel.addWidget(self.save_btn)
        
        # 添加幫助按鈕
        self.help_btn = QPushButton("使用說明")
        self.help_btn.clicked.connect(self.show_help)
        right_panel.addWidget(self.help_btn)
        
        controls_layout.addLayout(right_panel)
        layout.addLayout(controls_layout)
    
    def select_image(self):
        file_name, _ = QFileDialog.getOpenFileName(
            self,
            "選擇產(chǎn)品圖片",
            "",
            "圖片文件 (*.png *.jpg *.jpeg *.bmp)"
        )
        if file_name:
            self.product_image_path = file_name
            self.preview_image()
    
    def select_bg_color(self):
        color = QColorDialog.getColor()
        if color.isValid():
            self.bg_color = (color.red(), color.green(), color.blue())
            self.preview_image()
    
    def select_text_color(self):
        color = QColorDialog.getColor()
        if color.isValid():
            self.text_color = (color.red(), color.green(), color.blue())
            self.preview_image()
    
    def threshold_changed(self):
        self.threshold = self.threshold_slider.value()
        self.threshold_value_label.setText(str(self.threshold))
        if self.preview_dialog and self.preview_dialog.isVisible():
            self.show_preview()
        if self.product_image_path:
            self.preview_image()
    
    def toggle_remove_bg(self, state):
        self.remove_bg_enabled = bool(state)
        # 更新閾值控件的啟用狀態(tài)
        self.threshold_slider.setEnabled(self.remove_bg_enabled)
        self.threshold_value_label.setEnabled(self.remove_bg_enabled)
        self.preview_btn.setEnabled(self.remove_bg_enabled)
        # 如果有圖片，立即更新預覽
        if self.product_image_path:
            self.preview_image()
    
    def remove_background(self, image):
        if not self.remove_bg_enabled:
            return image.convert('RGBA')
            
        # 轉(zhuǎn)換圖片為RGBA模式
        image = image.convert('RGBA')
        data = image.getdata()
        new_data = []
        
        for item in data:
            # 如果像素接近白色，則設置為透明
            if item[0] >= self.threshold and item[1] >= self.threshold and item[2] >= self.threshold:
                new_data.append((255, 255, 255, 0))
            else:
                new_data.append(item)
        
        image.putdata(new_data)
        return image
    
    def show_preview(self):
        if not self.product_image_path:
            return
            
        if not self.preview_dialog:
            self.preview_dialog = PreviewDialog(self)
        
        try:
            # 加載原圖并去背景
            img = Image.open(self.product_image_path)
            img = self.remove_background(img)
            
            # 調(diào)整圖片大小以適應預覽窗口
            preview_size = 300
            img.thumbnail((preview_size, preview_size), Image.Resampling.LANCZOS)
            
            # 轉(zhuǎn)換為QImage
            img_data = img.convert("RGBA").tobytes("raw", "RGBA")
            qimg = QImage(img_data, img.size[0], img.size[1], QImage.Format_RGBA8888)
            
            # 顯示在預覽窗口中
            pixmap = QPixmap.fromImage(qimg)
            self.preview_dialog.preview_label.setPixmap(pixmap)
            
            # 顯示預覽窗口
            self.preview_dialog.show()
            
        except Exception as e:
            print(f"預覽出錯: {str(e)}")
    
    def preview_image(self):
        self.current_image = self.generate_ad(preview=True)
        if self.current_image:
            pixmap = QPixmap.fromImage(self.current_image)
            self.preview_label.setPixmap(pixmap.scaled(
                self.preview_label.size(),
                Qt.KeepAspectRatio,
                Qt.SmoothTransformation
            ))
    
    def generate_ad(self, preview=False):
        width, height = self.ad_width, self.ad_height  # 使用設置的尺寸
        image = Image.new('RGB', (width, height), self.bg_color)
        draw = ImageDraw.Draw(image)
        
        if self.product_image_path and os.path.exists(self.product_image_path):
            try:
                product_img = Image.open(self.product_image_path)
                product_img = self.remove_background(product_img)
                
                # 嚴格計算2/3寬度
                right_width = int(width * (2/3))  # 確保寬度正好是2/3
                product_height = int((right_width * product_img.height) / product_img.width)
                
                # 如果高度超出，按高度縮放，但保持寬度不超過2/3
                if product_height > height:
                    product_height = height
                    calc_width = int((product_height * product_img.width) / product_img.height)
                    right_width = min(calc_width, right_width)  # 取較小值確保不超過2/3
                
                product_img = product_img.resize((right_width, product_height))
                
                # 計算粘貼位置（右側(cè)居中）
                paste_x = width - right_width
                paste_y = (height - product_height) // 2
                
                # 粘貼產(chǎn)品圖片
                image.paste(product_img, (paste_x, paste_y), product_img)
            except Exception as e:
                print(f"處理圖片時出錯: {str(e)}")
        
        try:
            # 根據(jù)廣告尺寸調(diào)整字體大小
            font_size = min(32, int(height / 13))  # 動態(tài)計算合適的字體大小
            font = ImageFont.truetype("msyh.ttc", font_size)
        except:
            font = ImageFont.load_default()
        
        # 文本區(qū)域（使用左側(cè)1/3的空間）
        text_area_width = int(width * (1/3))  # 確保文本區(qū)域是1/3
        text = self.text_input.toPlainText()
        
        # 改進的文本換行處理
        lines = []
        current_line = ""
        
        # 按字符分割文本（考慮中文字符）
        for char in text:
            test_line = current_line + char
            text_bbox = draw.textbbox((0, 0), test_line, font=font)
            if text_bbox[2] - text_bbox[0] > text_area_width - 40:  # 留出左右邊距
                if current_line:
                    lines.append(current_line)
                    current_line = char
                else:
                    lines.append(char)
                    current_line = ""
            else:
                current_line += char
        
        if current_line:
            lines.append(current_line)
        
        # 計算文本總高度
        line_height = font.size + 8
        total_text_height = len(lines) * line_height
        
        # 繪制文本（左側(cè)居中）
        start_y = (height - total_text_height) // 2
        for i, line in enumerate(lines):
            text_bbox = draw.textbbox((0, 0), line, font=font)
            text_width = text_bbox[2] - text_bbox[0]
            x = 30  # 增加左邊距
            y = start_y + i * line_height
            draw.text((x, y), line, font=font, fill=self.text_color)
        
        if preview:
            # 轉(zhuǎn)換為QImage用于預覽
            data = image.tobytes("raw", "RGB")
            qimage = QImage(data, image.size[0], image.size[1], QImage.Format_RGB888)
            return qimage
        else:
            # 生成文件名（使用時間戳）
            timestamp = time.strftime("%Y%m%d_%H%M%S")
            output_path = os.path.join(self.output_dir, f"ad_{timestamp}.png")
            
            # 創(chuàng)建圖片
            width, height = self.ad_width, self.ad_height
            image = Image.new('RGB', (width, height), self.bg_color)
            draw = ImageDraw.Draw(image)
            
            if self.product_image_path and os.path.exists(self.product_image_path):
                try:
                    product_img = Image.open(self.product_image_path)
                    product_img = self.remove_background(product_img)
                    
                    # 嚴格計算2/3寬度
                    right_width = int(width * (2/3))  # 確保寬度正好是2/3
                    product_height = int((right_width * product_img.height) / product_img.width)
                    
                    # 如果高度超出，按高度縮放，但保持寬度不超過2/3
                    if product_height > height:
                        product_height = height
                        calc_width = int((product_height * product_img.width) / product_img.height)
                        right_width = min(calc_width, right_width)  # 取較小值確保不超過2/3
                    
                    product_img = product_img.resize((right_width, product_height))
                    
                    # 計算粘貼位置（右側(cè)居中）
                    paste_x = width - right_width
                    paste_y = (height - product_height) // 2
                    
                    # 粘貼產(chǎn)品圖片
                    image.paste(product_img, (paste_x, paste_y), product_img)
                except Exception as e:
                    print(f"處理圖片時出錯: {str(e)}")
            
            try:
                # 根據(jù)廣告尺寸調(diào)整字體大小
                font_size = min(32, int(height / 13))  # 動態(tài)計算合適的字體大小
                font = ImageFont.truetype("msyh.ttc", font_size)
            except:
                font = ImageFont.load_default()
            
            # 文本區(qū)域（使用左側(cè)1/3的空間）
            text_area_width = int(width * (1/3))  # 確保文本區(qū)域是1/3
            text = self.text_input.toPlainText()
            
            # 改進的文本換行處理
            lines = []
            current_line = ""
            
            # 按字符分割文本（考慮中文字符）
            for char in text:
                test_line = current_line + char
                text_bbox = draw.textbbox((0, 0), test_line, font=font)
                if text_bbox[2] - text_bbox[0] > text_area_width - 40:  # 留出左右邊距
                    if current_line:
                        lines.append(current_line)
                        current_line = char
                    else:
                        lines.append(char)
                        current_line = ""
                else:
                    current_line += char
            
            if current_line:
                lines.append(current_line)
            
            # 計算文本總高度
            line_height = font.size + 8
            total_text_height = len(lines) * line_height
            
            # 繪制文本（左側(cè)居中）
            start_y = (height - total_text_height) // 2
            for i, line in enumerate(lines):
                text_bbox = draw.textbbox((0, 0), line, font=font)
                text_width = text_bbox[2] - text_bbox[0]
                x = 30  # 增加左邊距
                y = start_y + i * line_height
                draw.text((x, y), line, font=font, fill=self.text_color)
            
            # 保存圖片
            try:
                image.save(output_path)
                print(f"圖片已保存到: {output_path}")
                return output_path
            except Exception as e:
                print(f"保存圖片失敗: {str(e)}")
                return None
    
    def save_image(self):
        timestamp = time.strftime("%Y%m%d_%H%M%S")
        default_name = f"ad_{timestamp}.png"
        file_name, _ = QFileDialog.getSaveFileName(
            self,
            "保存廣告圖片",
            os.path.join(self.output_dir, default_name),
            "PNG圖片 (*.png)"
        )
        if file_name:
            if self.generate_ad():
                # 復制生成的圖片到選擇的位置
                latest_file = os.path.join(self.output_dir, default_name)
                if os.path.exists(latest_file):
                    Image.open(latest_file).save(file_name)
                    print(f"圖片已保存到: {file_name}")
                else:
                    print("找不到生成的圖片文件")
    
    def size_changed(self):
        # 更新尺寸
        self.ad_width = self.width_input.value()
        self.ad_height = self.height_input.value()
        
        # 更新預覽標簽大小
        self.preview_label.setFixedSize(self.ad_width, self.ad_height)
        
        # 如果有圖片，重新生成預覽
        if self.product_image_path:
            self.preview_image()
    
    def select_output_path(self):
        dir_path = QFileDialog.getExistingDirectory(
            self,
            "選擇輸出目錄",
            self.output_dir,
            QFileDialog.ShowDirsOnly
        )
        if dir_path:
            self.output_dir = dir_path
            self.output_path_label.setText(self.output_dir)
    
    def show_help(self):
        if not self.help_dialog:
            self.help_dialog = HelpDialog(self)
        self.help_dialog.show()
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = AdGenerator()
    window.show()
    sys.exit(app.exec())