package videoser

import (
	"bytes"
	"io"
	"videoweb/app/appg"
	"videoweb/app/service/configser"
	"videoweb/pub/common/ipaddr"
	"videoweb/pub/common/m3u8"

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

// GetVTT 获取雪碧图 vtt，缩略图路径替换为图片 cdn，兼容 /laosiji 路径资源。
func GetVTT(ctx *gin.Context) {
	fn := func(c *gin.Context) (contentLength int64, contentType string, reader io.Reader, extraHeaders map[string]string, err error) {
		vttName := c.Param("key")

		var req m3u8.Req
		if err = c.BindQuery(&req); err != nil {
			return
		}
		req.Name = vttName

		imgCdn := configser.GetAppImageCdn(ipaddr.ResolveClientIP(c))
		originDomain := appg.Conf.OrigDomain
		lsjImageYuan := appg.Conf.LsjMediaConf.ImageYuan

		buff, err := m3u8.TransformVtt(req.Name, imgCdn, originDomain, lsjImageYuan)
		if err != nil {
			return
		}
		contentType = "text/vtt; charset=utf-8"
		reader = bytes.NewReader(buff)
		contentLength = int64(len(buff))
		extraHeaders = map[string]string{}
		return
	}
	handlerFile(ctx, fn)
}