package app

import (
	"fmt"
	"io"
	"log/slog"
	"strings"

	filesengine "git.optclblast.xyz/draincloud/draincloud-core/internal/files_engine"
	"git.optclblast.xyz/draincloud/draincloud-core/internal/logger"
	"git.optclblast.xyz/draincloud/draincloud-core/internal/reqcontext"
	"github.com/davecgh/go-spew/spew"
	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
)

const (
	maxFileSize = 10 << 30
)

func (d *DrainCloud) UploadFile(ctx *gin.Context) {
	if err := ctx.Request.ParseMultipartForm(maxFileSize); err != nil {
		logger.Error(ctx, "uploadFile handler error", logger.Err(err))
		writeError(ctx, err)
		return
	}

	userID, err := reqcontext.GetUserID(ctx)
	if err != nil {
		writeError(ctx, ErrorAccessDenied)
		return
	}

	if err := d.uploadFile(ctx, userID); err != nil {
		logger.Error(ctx, "uploadFile handle", logger.Err(err))
		writeError(ctx, err)
		return
	}
}

func (d *DrainCloud) uploadFile(ctx *gin.Context, userID uuid.UUID) error {
	title := ctx.PostForm("file")
	logger.Info(ctx, "uploadFile", slog.Any("postForm data", spew.Sdump(title)))

	file, header, err := ctx.Request.FormFile("file")
	if err != nil {
		return err
	}
	logger.Info(ctx, "uploadFile", slog.Any("header", spew.Sdump(header)))

	data, err := io.ReadAll(file)
	if err != nil {
		return err
	}

	ext := parseExtension(header.Filename)

	id, err := d.filesEngine.SaveFile(ctx, filesengine.File{
		Name:   header.Filename,
		UserID: userID,
		Data:   data,
		Ext:    ext,
		Size:   int64(len(data)),
		Type:   "", // че такое type?
	})
	if err != nil {
		return fmt.Errorf("failed to save file: %w", err)
	}
	logger.Debug(ctx, "new file id", "id", id)

	return nil
}

func parseExtension(filename string) string {
	parts := strings.Split(filename, ".")
	if len(parts) == 0 {
		return ""
	}

	return parts[len(parts)-1]
}