package main

import (
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"github.com/gin-gonic/gin"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"github.com/google/uuid"
	"goodnews/models"
	"goodnews/services"
)

// 全局数据库连接
var db *gorm.DB

func main() {
	// 初始化数据库
	var err error
	db, err = gorm.Open(sqlite.Open("goodnews.db"), &gorm.Config{})
	if err != nil {
		panic("failed to connect database")
	}

	// 自动迁移数据库
	db.AutoMigrate(&models.GoodNews{})

	// 初始化Gin路由
	r := gin.Default()

	// 设置静态文件服务
	r.Static("/uploads", "./uploads")
	// 设置页面路由
	r.StaticFile("/", "./templates/index.html")
	r.StaticFile("/manage", "./templates/manage.html")

	// API路由组
	api := r.Group("/api")
	{
		api.GET("/news", getGoodNewsList)
		api.PUT("/news/:id", updateGoodNews)
		api.DELETE("/news/:id", deleteGoodNews)
		api.POST("/upload", handleUploadAndCreate)
		api.GET("/offices", getOfficesList)
	}

	// 启动服务
	r.Run(":8080")
}

// 获取喜报列表
func getGoodNewsList(c *gin.Context) {
	var goodNewsList []models.GoodNews
	result := db.Find(&goodNewsList)
	if result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
		return
	}

	// 处理每条记录，添加图片URL并设置Office字段
	for i := range goodNewsList {
		// 将ImagePath转换为可访问的URL
		goodNewsList[i].ImageURL = "/" + goodNewsList[i].ImagePath
		// 确保Office字段与Representative字段一致
		goodNewsList[i].Office = goodNewsList[i].Representative
	}

	c.JSON(http.StatusOK, goodNewsList)
}

// 获取代表处列表
func getOfficesList(c *gin.Context) {
	var offices []string
	result := db.Model(&models.GoodNews{}).Distinct().Pluck("representative", &offices)
	if result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
		return
	}
	c.JSON(http.StatusOK, offices)
}

// 处理文件上传并创建喜报
func handleUploadAndCreate(c *gin.Context) {
	// 获取上传的图片
	file, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请选择要上传的图片文件"})
		return
	}

	// 验证文件类型
	ext := filepath.Ext(file.Filename)
	allowedExts := map[string]bool{".jpg": true, ".jpeg": true, ".png": true}
	if !allowedExts[strings.ToLower(ext)] {
		c.JSON(http.StatusBadRequest, gin.H{"error": "只支持jpg、jpeg和png格式的图片"})
		return
	}

	// 验证文件大小（限制为10MB）
	if file.Size > 10<<20 { // 10 MB
		c.JSON(http.StatusBadRequest, gin.H{"error": "图片大小不能超过10MB"})
		return
	}

	// 生成唯一的文件名
	newFileName := uuid.New().String() + ext
	uploadDir := filepath.Join(".", "uploads")
	filePath := filepath.Join(uploadDir, newFileName)

	// 确保上传目录存在
	if err := os.MkdirAll(uploadDir, 0755); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("创建上传目录失败: %v", err)})
		return
	}

	// 保存图片
	if err := c.SaveUploadedFile(file, filePath); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("图片保存失败: %v", err)})
		return
	}

	// 创建OCR服务
	ocrService, err := services.NewOCRService()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "OCR服务初始化失败"})
		return
	}
	defer ocrService.Close()

	// 提取图片信息
	projectName, points, representative, err := ocrService.ExtractInfo(filePath)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("图片识别失败: %v", err)})
		return
	}

	fmt.Println("OCR识别信息:", projectName, points, representative)
	// 创建喜报记录
	goodNews := models.GoodNews{
		ProjectName:    projectName,
		Points:         points,
		Representative: representative,
		ImagePath:      filePath,
	}

	result := db.Create(&goodNews)
	if result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
		return
	}

	// 重新获取记录以确保包含ID
	db.First(&goodNews, goodNews.ID)
	goodNews.ImageURL = "/" + goodNews.ImagePath

	c.JSON(http.StatusOK, goodNews)
}

// 更新喜报
func updateGoodNews(c *gin.Context) {
	var goodNews models.GoodNews
	if err := db.First(&goodNews, c.Param("id")).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "记录不存在"})
		return
	}

	if err := c.ShouldBindJSON(&goodNews); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	db.Save(&goodNews)
	c.JSON(http.StatusOK, goodNews)
}

// 删除喜报
func deleteGoodNews(c *gin.Context) {
	var goodNews models.GoodNews
	if err := db.First(&goodNews, c.Param("id")).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "记录不存在"})
		return
	}

	db.Delete(&goodNews)
	c.JSON(http.StatusOK, gin.H{"message": "删除成功"})
}

// 处理文件上传
func handleFileUpload(c *gin.Context) {
	// 获取上传的文件
	file, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请选择要上传的文件"})
		return
	}

	// 验证文件类型
	ext := filepath.Ext(file.Filename)
	allowedExts := map[string]bool{".jpg": true, ".jpeg": true, ".png": true}
	if !allowedExts[strings.ToLower(ext)] {
		c.JSON(http.StatusBadRequest, gin.H{"error": "只支持jpg、jpeg和png格式的图片"})
		return
	}

	// 生成唯一的文件名
	newFileName := uuid.New().String() + ext
	uploadDir := filepath.Join(".", "uploads")
	filePath := filepath.Join(uploadDir, newFileName)

	// 确保上传目录存在
	if err := os.MkdirAll(uploadDir, 0755); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("创建上传目录失败: %v", err)})
		return
	}

	// 保存图片
	if err := c.SaveUploadedFile(file, filePath); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("图片保存失败: %v", err)})
		return
	}

	// 创建OCR服务
	ocrService, err := services.NewOCRService()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "OCR服务初始化失败"})
		return
	}
	defer ocrService.Close()

	// 提取图片信息
	projectName, points, representative, err := ocrService.ExtractInfo(filePath)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("图片识别失败: %v", err)})
		return
	}

	// 创建喜报记录
	goodNews := models.GoodNews{
		ProjectName:    projectName,
		Points:         points,
		Representative: representative,
		ImagePath:      filePath,
	}

	result := db.Create(&goodNews)
	if result.Error != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
		return
	}

	// 重新获取记录以确保包含ID
	db.First(&goodNews, goodNews.ID)
	goodNews.ImageURL = "/" + goodNews.ImagePath

	c.JSON(http.StatusOK, goodNews)
}