<?php

class Reminder
{
    public static function findForUser(int $id, int $userId): ?array
    {
        $statement = Database::connection()->prepare(
            'SELECT r.*, h.title AS habit_title
             FROM reminders r
             INNER JOIN habits h ON h.id = r.habit_id
             WHERE r.id = :id AND h.user_id = :user_id
             LIMIT 1'
        );
        $statement->execute(['id' => $id, 'user_id' => $userId]);

        $reminder = $statement->fetch();
        return $reminder ?: null;
    }

    public static function allForUser(int $userId): array
    {
        $statement = Database::connection()->prepare(
            'SELECT r.*, h.title AS habit_title
             FROM reminders r
             INNER JOIN habits h ON h.id = r.habit_id
             WHERE h.user_id = :user_id
             ORDER BY h.title ASC, r.is_active DESC, r.weekday ASC, r.reminder_time ASC'
        );
        $statement->execute(['user_id' => $userId]);

        return $statement->fetchAll();
    }

    public static function createForHabit(int $habitId, int $userId, array $data): bool
    {
        $statement = Database::connection()->prepare(
            'INSERT INTO reminders (habit_id, reminder_time, weekday, is_active)
             SELECT id, :reminder_time, :weekday, :is_active
             FROM habits
             WHERE id = :habit_id AND user_id = :user_id'
        );
        $statement->execute([
            'habit_id' => $habitId,
            'user_id' => $userId,
            'reminder_time' => $data['reminder_time'],
            'weekday' => $data['weekday'],
            'is_active' => $data['is_active'],
        ]);

        return $statement->rowCount() === 1;
    }

    public static function update(int $id, int $userId, array $data): bool
    {
        $statement = Database::connection()->prepare(
            'UPDATE reminders r
             INNER JOIN habits h ON h.id = r.habit_id
             SET r.reminder_time = :reminder_time,
                 r.weekday = :weekday,
                 r.is_active = :is_active
             WHERE r.id = :id AND h.user_id = :user_id'
        );

        return $statement->execute([
            'id' => $id,
            'user_id' => $userId,
            'reminder_time' => $data['reminder_time'],
            'weekday' => $data['weekday'],
            'is_active' => $data['is_active'],
        ]);
    }

    public static function delete(int $id, int $userId): bool
    {
        $statement = Database::connection()->prepare(
            'DELETE r
             FROM reminders r
             INNER JOIN habits h ON h.id = r.habit_id
             WHERE r.id = :id AND h.user_id = :user_id'
        );

        return $statement->execute(['id' => $id, 'user_id' => $userId]);
    }

    public static function toggle(int $id, int $userId): bool
    {
        $statement = Database::connection()->prepare(
            'UPDATE reminders r
             INNER JOIN habits h ON h.id = r.habit_id
             SET r.is_active = IF(r.is_active = 1, 0, 1)
             WHERE r.id = :id AND h.user_id = :user_id'
        );

        return $statement->execute(['id' => $id, 'user_id' => $userId]);
    }
}