package db

import (
	"database/sql"
	"lostcavewireplanner/internal/models"
)

func (s *Store) ModelGetAll() ([]models.DeviceModel, error) {
	rows, err := s.DB.Query(`SELECT id, name, manufacturer, is_rack_mountable, height_units, front_image, back_image, is_patch_panel, is_wall_socket, created_at, updated_at FROM device_models ORDER BY name`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var list []models.DeviceModel
	for rows.Next() {
		var m models.DeviceModel
		if err := rows.Scan(&m.ID, &m.Name, &m.Manufacturer, &m.IsRackMountable, &m.HeightUnits,
			&m.FrontImage, &m.BackImage, &m.IsPatchPanel, &m.IsWallSocket, &m.CreatedAt, &m.UpdatedAt); err != nil {
			return nil, err
		}
		list = append(list, m)
	}
	return list, rows.Err()
}

func (s *Store) ModelGetByID(id int64) (*models.DeviceModel, error) {
	m := &models.DeviceModel{}
	err := s.DB.QueryRow(`SELECT id, name, manufacturer, is_rack_mountable, height_units, front_image, back_image, is_patch_panel, is_wall_socket, created_at, updated_at FROM device_models WHERE id = ?`, id).
		Scan(&m.ID, &m.Name, &m.Manufacturer, &m.IsRackMountable, &m.HeightUnits,
			&m.FrontImage, &m.BackImage, &m.IsPatchPanel, &m.IsWallSocket, &m.CreatedAt, &m.UpdatedAt)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	if err != nil {
		return nil, err
	}

	m.Ports, err = s.ModelPortGetByModelID(m.ID)
	if err != nil {
		return nil, err
	}
	return m, nil
}

func (s *Store) modelGetByIDTx(tx *sql.Tx, id int64) (*models.DeviceModel, error) {
	m := &models.DeviceModel{}
	err := tx.QueryRow(`SELECT id, name, manufacturer, is_rack_mountable, height_units, front_image, back_image, is_patch_panel, is_wall_socket FROM device_models WHERE id = ?`, id).
		Scan(&m.ID, &m.Name, &m.Manufacturer, &m.IsRackMountable, &m.HeightUnits,
			&m.FrontImage, &m.BackImage, &m.IsPatchPanel, &m.IsWallSocket)
	if err != nil {
		return nil, err
	}

	portRows, err := tx.Query(`SELECT id, device_model_id, name, side, position FROM device_model_ports WHERE device_model_id = ? ORDER BY side, position`, id)
	if err != nil {
		return nil, err
	}
	defer portRows.Close()
	for portRows.Next() {
		var p models.DeviceModelPort
		if err := portRows.Scan(&p.ID, &p.DeviceModelID, &p.Name, &p.Side, &p.Position); err != nil {
			return nil, err
		}
		m.Ports = append(m.Ports, p)
	}
	return m, portRows.Err()
}

func (s *Store) ModelCreate(m *models.DeviceModel, imageDir string) (int64, error) {
	tx, err := s.DB.Begin()
	if err != nil {
		return 0, err
	}
	defer tx.Rollback()

	res, err := tx.Exec(`INSERT INTO device_models (name, manufacturer, is_rack_mountable, height_units, front_image, back_image, is_patch_panel, is_wall_socket) VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
		m.Name, m.Manufacturer, m.IsRackMountable, m.HeightUnits, m.FrontImage, m.BackImage, m.IsPatchPanel, m.IsWallSocket)
	if err != nil {
		return 0, err
	}
	modelID, err := res.LastInsertId()
	if err != nil {
		return 0, err
	}

	for i := range m.Ports {
		m.Ports[i].DeviceModelID = modelID
	}
	if err := s.modelPortCreateTx(tx, modelID, m.Ports); err != nil {
		return 0, err
	}

	if err := tx.Commit(); err != nil {
		return 0, err
	}
	return modelID, nil
}

func (s *Store) ModelUpdate(m *models.DeviceModel) error {
	tx, err := s.DB.Begin()
	if err != nil {
		return err
	}
	defer tx.Rollback()

	_, err = tx.Exec(`UPDATE device_models SET name=?, manufacturer=?, is_rack_mountable=?, height_units=?, front_image=?, back_image=?, is_patch_panel=?, is_wall_socket=?, updated_at=datetime('now') WHERE id=?`,
		m.Name, m.Manufacturer, m.IsRackMountable, m.HeightUnits, m.FrontImage, m.BackImage, m.IsPatchPanel, m.IsWallSocket, m.ID)
	if err != nil {
		return err
	}

	if _, err := tx.Exec(`DELETE FROM device_model_ports WHERE device_model_id = ?`, m.ID); err != nil {
		return err
	}

	for i := range m.Ports {
		m.Ports[i].DeviceModelID = m.ID
	}
	if err := s.modelPortCreateTx(tx, m.ID, m.Ports); err != nil {
		return err
	}

	return tx.Commit()
}

func (s *Store) ModelDelete(id int64) error {
	_, err := s.DB.Exec(`DELETE FROM device_models WHERE id=?`, id)
	return err
}

func (s *Store) ModelPortGetByModelID(modelID int64) ([]models.DeviceModelPort, error) {
	rows, err := s.DB.Query(`SELECT id, device_model_id, name, side, position FROM device_model_ports WHERE device_model_id = ? ORDER BY side, position`, modelID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var ports []models.DeviceModelPort
	for rows.Next() {
		var p models.DeviceModelPort
		if err := rows.Scan(&p.ID, &p.DeviceModelID, &p.Name, &p.Side, &p.Position); err != nil {
			return nil, err
		}
		ports = append(ports, p)
	}
	return ports, rows.Err()
}

func (s *Store) modelPortCreateTx(tx *sql.Tx, modelID int64, ports []models.DeviceModelPort) error {
	for _, p := range ports {
		_, err := tx.Exec(`INSERT INTO device_model_ports (device_model_id, name, side, position) VALUES (?, ?, ?, ?)`,
			modelID, p.Name, p.Side, p.Position)
		if err != nil {
			return err
		}
	}
	return nil
}