package main

import (
	"crypto/sha512"
)

type Key struct {
	id          int64
	id_exercice int64
	Type        string
	Value       [64]byte
}

func (e Exercice) GetKeys() ([]Key, error) {
	if rows, err := DBQuery("SELECT id_key, type, value FROM exercice_keys WHERE id_exercice = ?", e.id); err != nil {
		return nil, err
	} else {
		defer rows.Close()

		var keys = make([]Key, 0)
		for rows.Next() {
			var k Key
			k.id_exercice = e.id
			if err := rows.Scan(&k.id, &k.id_exercice, &k.Type, &k.Value); err != nil {
				return nil, err
			}
			keys = append(keys, k)
		}
		if err := rows.Err(); err != nil {
			return nil, err
		}

		return keys, nil
	}
}

func (e Exercice) AddRawKey(name string, raw_value string) (Key, error) {
	return e.AddKey(name, sha512.Sum512([]byte(raw_value)))
}

func (e Exercice) AddKey(name string, value [64]byte) (Key, error) {
	if res, err := DBExec("INSERT INTO exercice_keys (id_exercice, type, value) VALUES (?, ?, ?)", e.id, name, value); err != nil {
		return Key{}, err
	} else if kid, err := res.LastInsertId(); err != nil {
		return Key{}, err
	} else {
		return Key{kid, e.id, name, value}, nil
	}
}

func (k Key) Update() (int64, error) {
	if res, err := DBExec("UPDATE exercice_keys SET id_exercice = ?, type = ?, value = ? WHERE id_key = ?", k.id_exercice, k.Type, k.Value, k.id); err != nil {
		return 0, err
	} else if nb, err := res.RowsAffected(); err != nil {
		return 0, err
	} else {
		return nb, err
	}
}

func (k Key) Delete() (int64, error) {
	if res, err := DBExec("DELETE FROM exercice_keys WHERE id_key = ?", k.id); err != nil {
		return 0, err
	} else if nb, err := res.RowsAffected(); err != nil {
		return 0, err
	} else {
		return nb, err
	}
}