package file_export

import (
	"encoding/json"
	"net/http"
	"os"
	"path/filepath"

	"nms_cxy/lib/file"
	"nms_cxy/lib/log"
	"nms_cxy/lib/services"
	"nms_cxy/src/framework/datasource"
	"nms_cxy/src/framework/i18n"
	"nms_cxy/src/framework/utils/ctx"

	"github.com/gin-gonic/gin"
)

type SysJobResponse struct {
	SysJob
	TableName    string `json:"tableName"`
	TableDisplay string `json:"tableDisplay"`
	FilePath     string `json:"filePath"`
}

type TargetParams struct {
	Duration  int    `json:"duration"`
	TableName string `json:"tableName"`
	Columns   string `json:"columns"`  // exported column name of time string
	TimeCol   string `json:"timeCol"`  // time stamp of column name
	TimeUnit  string `json:"timeUnit"` // timestamp unit: second/micro/milli
	Extras    string `json:"extras"`   // extras condition for where
	FilePath  string `json:"filePath"` // file path
}

func (m *SysJob) GetFileExportTable(c *gin.Context) {
	var results []SysJob

	err := datasource.DefaultDB().Table(m.TableName()).Where("invoke_target=? and status=1", INVOKE_FILE_EXPORT).
		Find(&results).Error
	if err != nil {
		c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
		return
	}
	language := ctx.AcceptLanguage(c)
	var response []SysJobResponse
	for _, job := range results {
		var params TargetParams
		if err := json.Unmarshal([]byte(job.TargetParams), &params); err != nil {
			c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
			return
		}
		TableDisplay := i18n.TKey(language, "table."+params.TableName)
		if TableDisplay == "" {
			TableDisplay = params.TableName
		}
		response = append(response, SysJobResponse{
			SysJob:       job,
			TableName:    params.TableName,
			TableDisplay: TableDisplay,
			FilePath:     params.FilePath,
		})
	}
	c.JSON(http.StatusOK, services.DataResp(response))
}

func (m *FileExport) GetFileList(c *gin.Context) {
	var querys FileExportQuery

	if err := c.ShouldBindQuery(&querys); err != nil {
		c.JSON(http.StatusBadRequest, services.ErrResp(err.Error()))
		return
	}

	files, err := file.GetFileInfo(querys.Path, querys.Suffix)
	if err != nil {
		log.Error(err)
		c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
	}

	// split files list
	lenNum := int64(len(files))
	start := (querys.PageNum - 1) * querys.PageSize
	end := start + querys.PageSize
	var splitList []file.FileInfo
	if start >= lenNum {
		splitList = []file.FileInfo{}
	} else if end >= lenNum {
		splitList = files[start:]
	} else {
		splitList = files[start:end]
	}
	total := len(files)
	c.JSON(http.StatusOK, services.TotalDataResp(splitList, total))
}

func (m *FileExport) Total(c *gin.Context) {
	dir := c.Query("path")

	fileCount, dirCount, err := file.GetFileAndDirCount(dir)
	if err != nil {
		log.Error(err)
		c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
		return
	}
	total := fileCount + dirCount
	c.JSON(http.StatusOK, services.TotalResp(int64(total)))
}

func (m *FileExport) DownloadHandler(c *gin.Context) {
	dir := c.Query("path")
	fileName := c.Param("fileName")
	filePath := filepath.Join(dir, fileName)

	file, err := os.Open(filePath)
	if err != nil {
		c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
		return
	}
	defer file.Close()

	if _, err := os.Stat(filePath); os.IsNotExist(err) {
		c.JSON(http.StatusNotFound, services.ErrResp(err.Error()))
		return
	}

	c.Header("Content-Disposition", "attachment; filename="+fileName)
	c.Header("Content-Type", "application/octet-stream")
	c.File(filePath)
}

func (m *FileExport) Delete(c *gin.Context) {
	fileName := c.Param("fileName")
	dir := c.Query("path")
	filePath := filepath.Join(dir, fileName)

	if err := os.Remove(filePath); err != nil {
		c.JSON(http.StatusInternalServerError, services.ErrResp(err.Error()))
		return
	}
	c.JSON(http.StatusNoContent, nil) // 204 No Content
}