package map_service

import (
	"context"
	"encoding/json"
	"fmt"
	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/protocol/consts"
	"io/ioutil"
	"net/http"
	"pji_desktop_http/common/config"
	"pji_desktop_http/common/entity"
	"pji_desktop_http/common/util"
	"strings"
)

// CheckMapBufConsistency .
// @router /map/checkmapbuf [GET]
func CheckMapBufConsistency(ctx context.Context, c *app.RequestContext) {
	var err error
	var req []string
	err = c.BindAndValidate(&req)
	if err != nil {
		c.String(consts.StatusBadRequest, err.Error())
		return
	}

	fmt.Println(req)

	if len(req) == 0 { // 请求数据为空
		c.JSON(consts.StatusBadRequest, entity.HttpResult{Status: false, Code: "", Message: "请求数据为空。"})
	} else if len(req) == 1 { // 只有一条数据则直接返回
		c.JSON(consts.StatusOK, entity.HttpResult{Status: true, Code: "", Message: "mapBuf文件夹数据一致。"})
	} else {
		var firstValue int
		for i, v := range req {
			// 根据id获取对应的oss文件列表
			fileList, err := getFileObjectBYId(v)
			if err != nil {
				c.String(consts.StatusBadRequest, err.Error())
				return
			}

			// 过滤特定后缀的文件列表
			suffixes := []string{
				"map.pgm",
				"map.yaml",
				"map.json",
				"forbid_area.json",
			}
			filteredFileList := filterBySuffixes(fileList, suffixes...)
			fmt.Println("Filtered Strings:", filteredFileList)

			// 获取文件列表的总大小
			totalSize := calculateTotalFileSize(filteredFileList)
			fmt.Println("Total Size:", totalSize)

			// 判断不同文件列表（mapBuf）中文件的总大小是否一致
			if i == 0 {
				firstValue = totalSize
			} else {
				if totalSize != firstValue {
					c.JSON(consts.StatusOK, entity.HttpResult{Status: false, Code: "", Message: "mapBuf文件夹数据不一致。"})
					return
				}
			}
		}

		c.JSON(consts.StatusOK, entity.HttpResult{Status: true, Code: "", Message: "mapBuf文件夹数据一致。"})
	}
}

// 根据id获取对应的oss文件列表
func getFileObjectBYId(id string) (fileList []string, err error) {
	url := config.SenceOssDownUrl + id

	// 构建请求
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}

	// 添加认证头
	req.Header.Set("Authorization", config.Token)

	// 发送请求
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		fmt.Println("Error executing request:", err)
		return
	}

	defer resp.Body.Close()
	body, _ := ioutil.ReadAll(resp.Body)

	// Json转换为map
	var data map[string]interface{}
	err = json.Unmarshal(body, &data)

	// 提取响应体中的data字段
	dataField, ok := data["data"].([]interface{})
	if !ok {
		fmt.Println("Error extracting data field")
		return
	}

	// 转换字符串切片
	for _, item := range dataField {
		str, ok := item.(string)
		if !ok {
			fmt.Println("Error converting item to string")
			return
		}
		fileList = append(fileList, str)
	}

	return fileList, err
}

// 从字符串切片中筛选出以特定后缀结尾的字符串
func filterBySuffixes(strList []string, suffixes ...string) []string {
	var filtered []string
	for _, s := range strList {
		for _, suffix := range suffixes {
			if strings.HasSuffix(s, suffix) {
				filtered = append(filtered, s)
				break
			}
		}
	}
	return filtered
}

// 计算oss中文件列表的总大小
func calculateTotalFileSize(fileList []string) int {
	var totalSize int
	for _, file := range fileList {
		size, err := util.GetOSSFileSize(config.OssBucket, file) // 获取oss中单个文件的大小
		if err != nil {
			return 0
		}
		totalSize += size
	}
	return totalSize
}