<?php

use Reservair\Database\Db;

class RsvTimetableReservationRepository {
    private string $table;
    private string $confirmation_table;

    public function __construct() {
        $this->table              = Db::prefix() . 'rsv_timetable_reservation';
        $this->confirmation_table = Db::prefix() . 'rsv_timetable_reservation_confirmation';
    }

    public function get_all(): array {
        return array_map(
            'RsvTimetableReservation::from_array',
            Db::get_results("SELECT * FROM {$this->table}")
        );
    }

    public function get(int $id): RsvTimetableReservation {
        return RsvTimetableReservation::from_array(Db::get_row(
            "SELECT * FROM {$this->table} WHERE id = %d",
            [$id],
            ARRAY_A
        ));
    }

    public function get_overlapping(int $timetable_id, DateTime $start_utc, DateTime $end_utc): array {
        return array_map(
            'RsvTimetableReservation::from_array',
            Db::get_results(
                "SELECT * FROM {$this->table}
                 WHERE timetable_id = %d
                   AND `start_utc` < %s
                   AND `end_utc`   > %s",
                [$timetable_id, $end_utc->format('Y-m-d H:i:s'), $start_utc->format('Y-m-d H:i:s')],
                ARRAY_A
            )
        );
    }

    public function insert(array $data): int {
        return Db::insert($this->table, $data);
    }

    public function insert_confirmation(int $reservation_id, int $timetable_reservation_id, string $code): void {
        Db::insert($this->confirmation_table, [
            'reservation_id'           => $reservation_id,
            'timetable_reservation_id' => $timetable_reservation_id,
            'code'                     => $code,
        ]);
    }

    public function get_confirmation(string $code): ?array {
        return Db::get_row(
            "SELECT c.*
             FROM {$this->confirmation_table} c
             JOIN {$this->table} tr ON tr.id = c.timetable_reservation_id
             WHERE c.code = %s
             LIMIT 1",
            [$code],
            ARRAY_A
        );
    }

    public function set_confirmed(int $timetable_reservation_id, bool $state): void {
        Db::update(
            $this->table,
            ['is_confirmed' => $state ? 1 : 0],
            ['id'           => $timetable_reservation_id]
        );
    }

    public function delete_confirmation(string $code): void {
        Db::delete($this->confirmation_table, ['code' => $code]);
    }

    public function has_pending_confirmation(int $reservation_id): bool {
        return (int) Db::get_var(
            "SELECT COUNT(*) FROM {$this->confirmation_table} c
             JOIN {$this->table} tr ON tr.id = c.timetable_reservation_id
             WHERE tr.reservation_id = %d",
            [$reservation_id]
        ) > 0;
    }

    public function get_confirmation_code(int $reservation_id): ?string {
        return Db::get_var(
            "SELECT c.code FROM {$this->confirmation_table} c
             JOIN {$this->table} tr ON tr.id = c.timetable_reservation_id
             WHERE tr.reservation_id = %d
             LIMIT 1",
            [$reservation_id]
        );
    }

    public function get_by_timetable(int $timetable_id, ?int $limit = null, int $skip = 0): array {
        $sql = "SELECT tr.*, c.timetable_reservation_id AS pending_confirmation_id
             FROM {$this->table} tr
             LEFT JOIN {$this->confirmation_table} c ON c.timetable_reservation_id = tr.id
             WHERE tr.timetable_id = %d
             ORDER BY tr.start_utc DESC";

        if ($limit === null) {
            return Db::get_results($sql, [$timetable_id], ARRAY_A);
        }
        return Db::get_results($sql . " LIMIT %d OFFSET %d", [$timetable_id, $limit, $skip], ARRAY_A);
    }

    public function count_by_timetable(int $timetable_id): int {
        return (int) Db::get_var(
            "SELECT COUNT(*) FROM {$this->table} WHERE timetable_id = %d",
            [$timetable_id]
        );
    }

    public function get_reservations_on_date(int $timetable_id, DateTime $date_utc): array {
        return array_map(
            'RsvTimetableReservation::from_array',
            Db::get_results(
                "SELECT * FROM {$this->table}
                 WHERE timetable_id = %d AND DATE(`start_utc`) = DATE(%s)
                 ORDER BY `start_utc`",
                [$timetable_id, $date_utc->format('Y-m-d')],
                ARRAY_A
            )
        );
    }
}