// Code scaffolded by goctl. Safe to edit.
// goctl 1.9.2

package file

import (
	"context"
	"fmt"

	"github.com/youruser/base/internal/svc"
	"github.com/youruser/base/internal/types"
	"github.com/youruser/base/model"

	"github.com/zeromicro/go-zero/core/logx"
)

type DeleteFileLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// 删除文件
func NewDeleteFileLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeleteFileLogic {
	return &DeleteFileLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *DeleteFileLogic) DeleteFile(req *types.DeleteFileRequest) (resp *types.Response, err error) {
	// Get userId and role from context
	userId, _ := l.ctx.Value("userId").(int64)
	if userId == 0 {
		if num, ok := l.ctx.Value("userId").(interface{ Int64() (int64, error) }); ok {
			userId, _ = num.Int64()
		}
	}
	userRole, _ := l.ctx.Value("role").(string)

	// Find file by ID
	fileRecord, err := model.FileFindOne(l.ctx, l.svcCtx.DB, req.Id)
	if err != nil {
		if err == model.ErrNotFound {
			return nil, fmt.Errorf("file not found")
		}
		return nil, fmt.Errorf("failed to query file: %v", err)
	}

	// Permission check: user can only delete own files, admin can delete all
	if userRole != model.RoleAdmin && userRole != model.RoleSuperAdmin {
		if fileRecord.UserId != userId {
			return nil, fmt.Errorf("permission denied")
		}
	}

	// Soft delete the file record
	if err := model.FileDelete(l.ctx, l.svcCtx.DB, req.Id); err != nil {
		return nil, fmt.Errorf("failed to delete file: %v", err)
	}

	// Attempt to delete from storage (log error but don't fail)
	if err := l.svcCtx.Storage.Delete(l.ctx, fileRecord.Key); err != nil {
		l.Errorf("failed to delete file from storage (key=%s): %v", fileRecord.Key, err)
	}

	resp = &types.Response{
		Code:    0,
		Message: "file deleted successfully",
		Success: true,
	}

	return resp, nil
}