package video

import (
	"context"
	"fmt"

	dto "media/model/dto/video"
	service "media/service/video"

	commonController "media/controller/common"

	"github.com/gogf/gf/v2/frame/g"
)

type transcode struct{}

var Transcode = new(transcode)

// Transcode 上传视频并转码为 H.264+AAC+MP4(faststart) POST /video/transcode
func (c *transcode) Transcode(ctx context.Context, req *struct {
	g.Meta    `path:"/video/transcode" method:"post" tags:"视频转码" summary:"上传视频转码为H.264+AAC+MP4(faststart)" dc:"上传视频文件，转码为标准MP4格式"`
	OutputDir string `json:"outputDir" dc:"输出目录(可选)，不传则输出到resource/temp下"`
}) (res *dto.TranscodeRes, err error) {
	ctx = withUser(ctx)

	// 保存上传文件
	filePaths, saveErr := commonController.SaveUploadedFilesFromCtx(ctx)
	if saveErr != nil || len(filePaths) == 0 {
		return nil, fmt.Errorf("上传文件失败: %v", saveErr)
	}
	inputPath := filePaths[0]
	g.Log().Infof(ctx, "[转码] 上传文件保存到: %s", inputPath)

	// 调用转码服务，outputDir 为空则 service 用默认值
	res, err = service.Transcode.TranscodeToMP4(ctx, inputPath, req.OutputDir)
	if err != nil {
		return nil, fmt.Errorf("转码失败: %v", err)
	}

	g.Log().Infof(ctx, "[转码] 完成: %s", res.OutputPath)
	return res, nil
}