/*
 * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
 */
package fileoper

import (
	"context"
	"net/http"
	"path/filepath"

	"mstore/pkg/descr"
)

// Check files
type CheckFilesParams struct {
	Path     string
	PathType string `param:"pathType"`
}
type CheckFilesResult struct {
	Files []descr.File `json:"files,omitempty"`
}

func (oper *Operator) CheckFiles(ctx context.Context, operatorID string, params *CheckFilesParams) (int, *CheckFilesResult, error) {
	var code int
	res := &CheckFilesResult{
		Files: make([]descr.File, 0),
	}
	var err error
	code = http.StatusOK
	// Check existing and size
	files, err := oper.listFiles(ctx, params.PathType, params.Path)
	if err != nil {
		code = http.StatusInternalServerError
		return code, res, err
	}
	for _, file := range files {
		exists, size, err := oper.store.FileExists(file.Collection, file.Name)
		if err != nil {
			code := http.StatusInternalServerError
			return code, res, err
		}
		fullpath := filepath.Join(file.Collection, file.Name)
		if !exists {
			oper.logg.Warningf("File not exists: %s", fullpath)
			res.Files = append(res.Files, file)
			err = oper.mdb.DeleteFileByCollectionName(ctx, file.Collection, file.Name)
			if err != nil {
				code := http.StatusInternalServerError
				return code, res, err
			}
		}
		if size != file.Size {
			oper.logg.Warningf("File has incorrect size: %s", fullpath)
			res.Files = append(res.Files, file)
			err = oper.mdb.DeleteFileByCollectionName(ctx, file.Collection, file.Name)
			if err != nil {
				code := http.StatusInternalServerError
				return code, res, err
			}
			err = oper.store.DeleteFile(file.Collection, file.Name)
			if err != nil {
				code := http.StatusInternalServerError
				return code, res, err
			}
		}
	}
	// Check hashs
	files, err = oper.listFiles(ctx, params.PathType, params.Path)
	if err != nil {
		code = http.StatusInternalServerError
		return code, res, err
	}
	for _, file := range files {
		sum, err := oper.store.GetFileCheksum(file.Collection, file.Name)
		if err != nil {
			code := http.StatusInternalServerError
			return code, res, err
		}
		fullpath := filepath.Join(file.Collection, file.Name)
		if sum != file.Checksum {
			oper.logg.Warningf("File has incorrect digest: %s", fullpath)
			res.Files = append(res.Files, file)
			err = oper.mdb.DeleteFileByCollectionName(ctx, file.Collection, file.Name)
			if err != nil {
				code := http.StatusInternalServerError
				return code, res, err
			}
			err = oper.store.DeleteFile(file.Collection, file.Name)
			if err != nil {
				code := http.StatusInternalServerError
				return code, res, err
			}
		}
	}
	return code, res, err
}