package services

import (
	"basic-sensor-receiver/models"
	"time"
)

type AlertsService struct {
	ctx *Context
}

func (s *AlertsService) GetList() ([]models.AlertItem, error) {
	alerts := []models.AlertItem{}

	err := s.ctx.DB.Select(&alerts, `
		SELECT id, contact_point_id, name, custom_message, custom_resolved_message, condition, trigger_interval, last_status, last_status_at
		FROM alerts
		ORDER BY name ASC
	`)

	if err != nil {
		return nil, err
	}

	return alerts, nil
}

func (s *AlertsService) GetById(id int64) (*models.AlertItem, error) {
	alert := models.AlertItem{}

	err := s.ctx.DB.Get(&alert,
		`
		SELECT id, contact_point_id, name, custom_message, custom_resolved_message, condition, trigger_interval, last_status, last_status_at
		FROM alerts
		WHERE id = $1
		`,
		id,
	)

	if err != nil {
		return nil, err
	}

	return &alert, nil
}

func (s *AlertsService) Create(contactPointId int64, name string, condition string, triggerInterval int64, customMessage string, customResolvedMessage string) (*models.AlertItem, error) {
	alert := models.AlertItem{
		ContactPointId:        contactPointId,
		Name:                  name,
		Condition:             condition,
		TriggerInterval:       triggerInterval,
		CustomMessage:         customMessage,
		CustomResolvedMessage: customResolvedMessage,
		LastStatus:            models.AlertStatusOk,
		LastStatusAt:          time.Now().Unix(),
	}

	res, err := s.ctx.DB.NamedExec(
		`
		INSERT INTO alerts
		(contact_point_id, name, condition, trigger_interval, last_status, last_status_at, custom_message, custom_resolved_message) VALUES
		(:contact_point_id, :name, :condition, :trigger_interval, :last_status, :last_status_at, :custom_message, :custom_resolved_message)
		`,
		alert,
	)

	if err != nil {
		return nil, err
	}

	alert.Id, err = res.LastInsertId()

	if err != nil {
		return nil, err
	}

	return &alert, nil
}

func (s *AlertsService) Update(id int64, contactPointId int64, name string, condition string, triggerInterval int64, customMessage string, customResolvedMessage string) (*models.AlertItem, error) {
	alert := models.AlertItem{
		Id:                    id,
		ContactPointId:        contactPointId,
		Name:                  name,
		Condition:             condition,
		TriggerInterval:       triggerInterval,
		CustomMessage:         customMessage,
		CustomResolvedMessage: customResolvedMessage,
	}

	_, err := s.ctx.DB.NamedExec(
		`
		UPDATE alerts
		SET
			name = :name,
			contact_point_id = :contact_point_id,
			condition = :condition,
			trigger_interval = :trigger_interval,
			custom_message = :custom_message,
			custom_resolved_message = :custom_resolved_message
		WHERE id = :id
		`,
		alert,
	)

	if err != nil {
		return nil, err
	}

	return &alert, nil
}

func (s *AlertsService) DeleteById(id int64) error {
	_, err := s.ctx.DB.Exec("DELETE FROM alerts WHERE id = ?", id)

	if err != nil {
		return err
	}

	return nil
}