<?php
namespace Sodino\Repositories;

use Sodino\Models\Rule;
use Sodino\Core\Cache;

/**
 * Rule Repository
 */
class RuleRepository {
    private $table_name;
    private $cache;
    private $cache_group = 'rules';
    private $cache_duration = 3600;

    public function __construct() {
        global $wpdb;
        $this->table_name = $wpdb->prefix . 'sodino_rules';
        $this->cache = Cache::getInstance();
    }

    /**
     * Get all rules
     */
    public function getAll() {
        return $this->cache->remember('all_rules', function() {
            global $wpdb;
            $results = $wpdb->get_results(
                "SELECT * FROM {$this->table_name} ORDER BY priority DESC, id ASC",
                ARRAY_A
            );
            $rules = [];
            foreach ($results as $result) {
                $rules[] = new Rule($result);
            }
            return $rules;
        }, $this->cache_duration, $this->cache_group);
    }

    /**
     * Get rule by ID
     */
    public function getById($id) {
        return $this->cache->remember("rule_{$id}", function() use ($id) {
            global $wpdb;
            $result = $wpdb->get_row(
                $wpdb->prepare("SELECT * FROM {$this->table_name} WHERE id = %d", $id),
                ARRAY_A
            );
            return $result ? new Rule($result) : null;
        }, $this->cache_duration, $this->cache_group);
    }

    /**
     * Get enabled rules
     */
    public function getEnabled() {
        return $this->cache->remember('enabled_rules', function() {
            global $wpdb;
            $now = current_time('mysql');
            $results = $wpdb->get_results(
                $wpdb->prepare(
                    "SELECT * FROM {$this->table_name} 
                    WHERE enabled = 1 
                    AND (start_date IS NULL OR start_date <= %s)
                    AND (end_date IS NULL OR end_date >= %s)
                    ORDER BY priority DESC, id ASC",
                    $now,
                    $now
                ),
                ARRAY_A
            );
            $rules = [];
            foreach ($results as $result) {
                $rules[] = new Rule($result);
            }
            return $rules;
        }, $this->cache_duration, $this->cache_group);
    }

    /**
     * Save rule
     */
    public function save(Rule $rule) {
        global $wpdb;
        $data = $rule->toArray();
        unset($data['id'], $data['created_at'], $data['updated_at']);

        if ($rule->id) {
            $wpdb->update($this->table_name, $data, ['id' => $rule->id]);
            $id = $rule->id;
        } else {
            $wpdb->insert($this->table_name, $data);
            $id = $wpdb->insert_id;
        }
        
        // Clear cache
        $this->clearCache();
        
        return $id;
    }

    /**
     * Delete rule
     */
    public function delete($id) {
        global $wpdb;
        $result = $wpdb->delete($this->table_name, ['id' => $id]);
        
        // Clear cache
        $this->clearCache();
        
        return $result;
    }
    
    /**
     * Increment usage count
     */
    public function incrementUsage($id) {
        global $wpdb;
        return $wpdb->query(
            $wpdb->prepare(
                "UPDATE {$this->table_name} SET usage_count = usage_count + 1 WHERE id = %d",
                $id
            )
        );
    }
    
    /**
     * Clear cache
     */
    private function clearCache() {
        $this->cache->clearGroup($this->cache_group);
    }
}