package api

import (
	"fmt"
	"image"
	"log"
	"os"
	"reflect"
	"regexp"
	"sort"
	"strings"
	"time"

	_ "github.com/doug-martin/goqu/v9/dialect/mysql"
	"github.com/graphql-go/graphql"
	"github.com/graphql-go/graphql/language/ast"
	"github.com/spf13/viper"
	"github.com/thoas/go-funk"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

var db *gorm.DB
var err error

func InitDefault(config *viper.Viper) {
	if db, err = gorm.Open(mysql.Open(fmt.Sprintf(
		"%s:%s@tcp(%s:%d)/%s?charset=utf8mb4&parseTime=True&loc=Local",
		config.GetString("mysql.user"),
		config.GetString("mysql.password"),
		config.GetString("mysql.host"),
		config.GetInt("mysql.port"),
		config.GetString("mysql.database"),
	)), &gorm.Config{}); err != nil {
		log.Fatal("failed to connect to database:", err)
	}
}

func ParseToken(token string) (user_id int) {
	if err := db.Table("web_auth").Select("user_id").Where("token = ?", token).Scan(&user_id).Error; err != nil {
		fmt.Println("token解析失败", err)
	}
	return user_id
}

// 定时检查补全颜色字段
func CheckColorNullRows(offset int) {
	for {
		time.Sleep(1 * time.Second)
		var list []struct {
			ID      int
			Content string
		}

		fmt.Println("跳过的行数:", offset)
		if err := db.Table("web_images").Select("id", "content").Where("article_category_top_id = 22").Where("color_0_r IS NULL").Offset(offset).Limit(100).Scan(&list).Error; err != nil {
			fmt.Println("定时检查补全颜色字段查询失败", err)
			continue
		}
		for index, item := range list {
			matches := regexp.MustCompile(`^https?://image\.gameuiux\.cn/(.*)`).FindStringSubmatch(item.Content)
			if len(matches) < 2 {
				fmt.Println("转换路径失败", index, item.ID, item.Content)
				continue
			}
			// 打开图像文件
			filepath := "oss/" + matches[1]
			file, err := os.Open(filepath)
			if err != nil {
				fmt.Println("打开文件失败", index, item.ID, item.Content, err)
				offset++
				continue
			}
			defer file.Close()

			// 解码 JPEG 图像
			img, _, err := image.Decode(file)
			if err != nil {
				fmt.Println("解码图像失败", index, item.ID, item.Content, err)
				continue
			}

			k := 8
			centers, labels := KMeans(extractColors(img), k)

			// 将聚类中心和颜色数量结合，并按颜色数量降序排序
			type cluster struct {
				center RGB
				count  int
			}
			clusters := make([]cluster, k)
			for i := 0; i < k; i++ {
				clusters[i] = cluster{center: centers[i], count: 0}
			}
			// 统计每个聚类的颜色数量
			for _, label := range labels {
				clusters[label].count++
			}
			// 按颜色数量降序排序
			sort.Slice(clusters, func(i, j int) bool {
				return clusters[i].count > clusters[j].count
			})
			// 返回排序后的聚类中心
			sortedCenters := make([]RGB, k)
			for i, c := range clusters {
				sortedCenters[i] = c.center
			}

			//fmt.Println("聚类后的颜色数量:", clusters)

			if err := db.Table("web_images").Where("id = ?", item.ID).Updates(map[string]interface{}{
				"color_0_r": sortedCenters[0].R,
				"color_0_g": sortedCenters[0].G,
				"color_0_b": sortedCenters[0].B,
				"color_1_r": sortedCenters[1].R,
				"color_1_g": sortedCenters[1].G,
				"color_1_b": sortedCenters[1].B,
			}).Error; err != nil {
				fmt.Println("更新颜色字段失败", index, item.ID, item.Content, err)
				continue
			}
			fmt.Println("更新颜色索引:", item.ID, filepath)
		}
	}
}

// 获取所有字段名
func LoadItem(requestedFields []ast.Selection) (data []string) {
	var items = []string{"user", "article"}
	for _, field := range requestedFields {
		fieldAST, _ := field.(*ast.Field)
		if funk.Contains(items, fieldAST.Name.Value) {
			name := fieldAST.Name.Value
			name = strings.ToUpper(string(name[0])) + name[1:]
			data = append(data, name)
			for _, str := range LoadItem(fieldAST.SelectionSet.Selections) {
				data = append(data, name+"."+str)
			}
		}
		if fieldAST.Name.Value == "list" {
			for _, str := range LoadItem(fieldAST.SelectionSet.Selections) {
				data = append(data, str)
			}
		}
	}
	return data
}

// 自动生成 GraphQL 类型的函数
func generateGraphQLType(model interface{}) (*graphql.Object, error) {
	modelType := reflect.TypeOf(model)
	if modelType.Kind() != reflect.Struct {
		return nil, fmt.Errorf("model must be a struct")
	}

	fields := graphql.Fields{}
	for i := 0; i < modelType.NumField(); i++ {
		field := modelType.Field(i)
		fieldType := graphql.String // 默认使用字符串类型

		// 这里可以根据需要添加更多类型映射
		switch field.Type.Kind() {
		case reflect.String:
			fieldType = graphql.String
		case reflect.Int:
			fieldType = graphql.Int
		case reflect.Bool:
			fieldType = graphql.Boolean
		}

		fields[field.Name] = &graphql.Field{
			Type: fieldType,
		}
	}

	return graphql.NewObject(graphql.ObjectConfig{
		Name:   modelType.Name(),
		Fields: fields,
	}), nil
}

// 判断指定字段是否存在
func existField(selections []ast.Selection, name string) bool {
	for _, field := range selections {
		if f, ok := field.(*ast.Field); ok && f.Name.Value == name {
			return true
		}
	}
	return false
}

// 将 list 中的字段提取出来用于查询
func get_fields(requestedFields []ast.Selection) (fields []string) {
	for _, field := range requestedFields {
		fieldAST, _ := field.(*ast.Field)
		if fieldAST.Name.Value == "list" {
			for _, field := range fieldAST.SelectionSet.Selections {
				fieldAST, _ := field.(*ast.Field)
				if fieldAST.Name.Value == "text_count" {
					continue
				}
				fields = append(fields, fieldAST.Name.Value)
			}
		}
	}
	return fields
}

var orderType = graphql.NewEnum(graphql.EnumConfig{
	Name:        "OrderType",
	Description: "排序类型",
	Values: graphql.EnumValueConfigMap{
		"ASC": &graphql.EnumValueConfig{
			Value:       "ASC",
			Description: "升序",
		},
		"DESC": &graphql.EnumValueConfig{
			Value:       "DESC",
			Description: "降序",
		},
	},
})