<?php
namespace Sodino\Repositories;

/**
 * Event Repository
 */
class EventRepository {
    private $table_name;

    public function __construct() {
        global $wpdb;
        $this->table_name = $wpdb->prefix . 'sodino_events';
    }

    public function insert(array $data) {
        global $wpdb;
        return $wpdb->insert($this->table_name, $data);
    }

    public function getEvents(array $filters = []) {
        global $wpdb;
        $params = [];
        $where = $this->buildWhereClauses($filters, $params);

        $sql = "SELECT * FROM {$this->table_name} WHERE " . implode(' AND ', $where) . " ORDER BY created_at ASC";
        return $wpdb->get_results($wpdb->prepare($sql, $params), ARRAY_A);
    }

    public function getCount(array $filters = []) {
        global $wpdb;
        $params = [];
        $where = $this->buildWhereClauses($filters, $params);

        $sql = "SELECT COUNT(*) FROM {$this->table_name} WHERE " . implode(' AND ', $where);
        return (int) $wpdb->get_var($wpdb->prepare($sql, $params));
    }

    public function getSum($field, array $filters = []) {
        global $wpdb;
        if (!in_array($field, ['value', 'discount_value'], true)) {
            return 0;
        }

        $params = [];
        $where = $this->buildWhereClauses($filters, $params);

        $sql = "SELECT SUM({$field}) FROM {$this->table_name} WHERE " . implode(' AND ', $where);
        return floatval($wpdb->get_var($wpdb->prepare($sql, $params)));
    }

    public function getRuleUsageCount($rule_id) {
        global $wpdb;
        return (int) $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) FROM {$this->table_name} WHERE event_type = %s AND rule_id = %d",
            'discount_applied',
            $rule_id
        ));
    }

    private function buildWhereClauses(array $filters, array &$params) {
        $where = ['1=1'];

        if (!empty($filters['event_type'])) {
            if (is_array($filters['event_type'])) {
                $placeholders = implode(', ', array_fill(0, count($filters['event_type']), '%s'));
                $where[] = "event_type IN ($placeholders)";
                $params = array_merge($params, $filters['event_type']);
            } else {
                $where[] = 'event_type = %s';
                $params[] = $filters['event_type'];
            }
        }

        if (!empty($filters['product_ids'])) {
            $ids = array_map('intval', (array) $filters['product_ids']);
            $placeholders = implode(', ', array_fill(0, count($ids), '%d'));
            $where[] = "product_id IN ($placeholders)";
            $params = array_merge($params, $ids);
        }

        if (!empty($filters['rule_id'])) {
            $where[] = 'rule_id = %d';
            $params[] = intval($filters['rule_id']);
        }

        if (!empty($filters['from'])) {
            $where[] = 'created_at >= %s';
            $params[] = $filters['from'];
        }

        if (!empty($filters['to'])) {
            $where[] = 'created_at <= %s';
            $params[] = $filters['to'];
        }

        return $where;
    }
}