package logic

import (
	"context"
	"errors"
	"leafdev.top/leaf/rag/ent"
	"leafdev.top/leaf/rag/ent/library"
	"leafdev.top/leaf/rag/internal/providers/helper"
)

type LibraryLogic struct {
}

var pageSize = 10

func NewLibraryLogic() *LibraryLogic {
	return &LibraryLogic{}
}

func (l *LibraryLogic) ListLibrary(ctx context.Context, page int) ([]*ent.Library, error) {
	return orm.Library.Query().Where(library.UserID(GetUserId(ctx))).
		Offset(helper.Offset(page, pageSize)).
		Limit(pageSize).
		All(ctx)
}

func (l *LibraryLogic) CreateLibrary(ctx context.Context, name string) (*ent.Library, error) {
	// name 不能为空
	if name == "" {
		return nil, errors.New("名称不能为空")
	}

	return orm.Library.Create().
		SetName(name).
		SetUserID(GetUserId(ctx)).
		Save(ctx)
}

func (l *LibraryLogic) DeleteLibrary(ctx context.Context, id int) error {
	return orm.Library.DeleteOneID(id).Exec(ctx)
}

func (l *LibraryLogic) UpdateLibrary(ctx context.Context, id int, name string) (*ent.Library, error) {
	return orm.Library.UpdateOneID(id).
		SetName(name).
		Save(ctx)
}

func (l *LibraryLogic) GetLibrary(ctx context.Context, id int) (*ent.Library, error) {
	return orm.Library.Get(ctx, id)
}

func (l *LibraryLogic) Exists(ctx context.Context, id int) (bool, error) {
	return orm.Library.Query().Where(library.ID(id)).Exist(ctx)
}

func (l *LibraryLogic) ExistsByUser(ctx context.Context, libraryId int) (bool, error) {
	return orm.Library.Query().Where(library.IDEQ(libraryId), library.UserIDEQ(GetUserId(ctx))).Exist(ctx)
}