package core

import (
	"database/sql/driver"
	"encoding/json"
)

// Type alias for storing string array as jsonb
type argList []string

func (a argList) Value() (driver.Value, error) {
	return json.Marshal(a)
}

func (a *argList) Scan(value interface{}) error {
	return json.Unmarshal([]byte(value.(string)), a)
}

func AddAction(db DB, source string, name string, argv []string) error {
	_, err := db.Exec(`
		insert into actions (source, name, argv)
		values (?, ?, jsonb(?))
	`, source, name, argList(argv))
	return err
}

func UpdateAction(db DB, source string, name string, argv []string) error {
	_, err := db.Exec(`
		update actions
		set argv = jsonb(?)
		where source = ? and name = ?
	`, argList(argv), source, name)
	return err
}

func GetActionsForSource(db DB, source string) ([]string, error) {
	rows, err := db.Query(`
		select name
		from actions
		where source = ?
	`, source)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var names []string
	for rows.Next() {
		var name string
		err = rows.Scan(&name)
		if err != nil {
			return nil, err
		}
		names = append(names, name)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return names, nil
}

func GetArgvForAction(db DB, source string, name string) ([]string, error) {
	rows := db.QueryRow(`
		select json(argv)
		from actions
		where source = ? and name = ?
	`, source, name)
	var argv argList
	err := rows.Scan(&argv)
	if err != nil {
		return nil, err
	}
	return argv, nil
}

func DeleteAction(db DB, source string, name string) error {
	_, err := db.Exec(`
		delete from actions
		where source = ? and name = ?
	`, source, name)
	return err
}