package services

import (
	"basic-sensor-receiver/integrations"
	"database/sql"
	"errors"
	"fmt"
)

type ContactPointsService struct {
	ctx *Context
}

type ContactPointItem struct {
	Id         int64  `json:"id"`
	Name       string `json:"name"`
	Type       string `json:"type"`
	TypeConfig string `json:"typeConfig"`
}

func (s *ContactPointsService) GetList() ([]ContactPointItem, error) {
	contactPoints := make([]ContactPointItem, 0)

	rows, err := s.ctx.DB.Query("SELECT id, name, type, type_config FROM contact_points")

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

		return nil, err
	}

	defer rows.Close()

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

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

		contactPoints = append(contactPoints, item)
	}

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

	return contactPoints, nil
}

func (s *ContactPointsService) Create(name string, contactType string, contactTypeConfig string) (*ContactPointItem, error) {
	switch contactType {
	case "telegram":
		{
			err := s.ctx.Integrations.Telegram.ValidateConfig(contactTypeConfig)

			if err != nil {
				return nil, fmt.Errorf("failed to validate telegram config - %w", err)
			}
		}
	}

	item := ContactPointItem{
		Name:       name,
		Type:       contactType,
		TypeConfig: contactTypeConfig,
	}

	res, err := s.ctx.DB.Exec("INSERT INTO contact_points (name, type, type_config) VALUES (?, ?, ?)", item.Name, item.Type, item.TypeConfig)

	if err != nil {
		return nil, err
	}

	id, err := res.LastInsertId()

	if err != nil {
		return nil, err
	}

	item.Id = id

	return &item, nil
}

func (s *ContactPointsService) GetById(id int64) (*ContactPointItem, error) {
	item := ContactPointItem{}

	row := s.ctx.DB.QueryRow("SELECT id, name, type, type_config FROM contact_points WHERE id = ?", id)
	err := row.Scan(&item.Id, &item.Name, &item.Type, &item.TypeConfig)

	if err != nil {
		return nil, err
	}

	return &item, nil
}

func (s *ContactPointsService) Update(id int64, name string, contactType string, contactTypeConfig string) (*ContactPointItem, error) {
	item := ContactPointItem{
		Id:         id,
		Name:       name,
		Type:       contactType,
		TypeConfig: contactTypeConfig,
	}

	_, err := s.ctx.DB.Exec("UPDATE contact_points SET name = ?, type = ?, type_config = ? WHERE id = ?", item.Name, item.Type, item.TypeConfig, item.Id)

	if err != nil {
		return nil, err
	}

	return &item, nil
}

func (s *ContactPointsService) Delete(id int64) error {
	_, err := s.ctx.DB.Exec("DELETE FROM contact_points WHERE id = ?", id)

	return err
}

func (s *ContactPointsService) Test(item *ContactPointItem) error {
	service, err := item.getTestService(s.ctx)

	if err != nil {
		return err
	}

	return service.ProcessEvent(&integrations.ContactPointEvent{
		Type: integrations.ContactPointEventTest,
	}, item.TypeConfig)
}

func (channel *ContactPointItem) getService(ctx *Context) (integrations.ContactPointIntegration, error) {
	switch channel.Type {
	case "telegram":
		return ctx.Integrations.Telegram, nil
	}

	return nil, errors.New("unknown channel type")
}

func (channel *ContactPointItem) getTestService(ctx *Context) (integrations.ContactPointIntegration, error) {
	switch channel.Type {
	case "telegram":
		return ctx.Integrations.Telegram, nil
	}

	return nil, errors.New("unknown channel type")
}