package services

import "database/sql"

type DashboardsService struct {
	ctx *Context
}

type DashboardItem struct {
	Id       int64  `json:"id"`
	Name     string `json:"name"`
	Contents string `json:"contents"`
}

func (s *DashboardsService) GetList() ([]DashboardItem, error) {
	items := make([]DashboardItem, 0)

	rows, err := s.ctx.DB.Query("SELECT id, name, contents FROM dashboards")

	if err != nil {
		if err == sql.ErrNoRows {
			return items, nil
		}

		return nil, err
	}

	defer rows.Close()

	for rows.Next() {
		item := DashboardItem{}

		err := rows.Scan(&item.Id, &item.Name, &item.Contents)
		if err != nil {
			return nil, err
		}

		items = append(items, item)
	}

	err = rows.Err()
	if err != nil {
		return nil, err
	}

	return items, nil
}

func (s *DashboardsService) Create(name string, contents string) (*DashboardItem, error) {
	item := DashboardItem{
		Name:     name,
		Contents: contents,
	}

	_, err := s.ctx.DB.Exec("INSERT INTO dashboards (name, contents) VALUES (?, ?)", item.Name, item.Contents)

	if err != nil {
		return nil, err
	}

	return &item, nil
}

func (s *DashboardsService) Update(id int64, name string, contents string) (*DashboardItem, error) {
	item := DashboardItem{
		Id:       id,
		Name:     name,
		Contents: contents,
	}

	_, err := s.ctx.DB.Exec("UPDATE dashboards SET contents = ?, name = ? WHERE id = ?", item.Contents, item.Name, item.Id)

	if err != nil {
		return nil, err
	}

	return &item, nil
}

func (s *DashboardsService) Delete(id int64) error {
	_, err := s.ctx.DB.Exec("DELETE FROM dashboards WHERe id = ?", id)

	return err
}

func (s *DashboardsService) GetById(id int64) (*DashboardItem, error) {
	item := DashboardItem{}

	row := s.ctx.DB.QueryRow("SELECT id, name, contents FROM dashboards WHERE id = ?", id)

	err := row.Scan(&item.Id, &item.Name, &item.Contents)
	if err != nil {
		return nil, err
	}

	return &item, nil
}