<?php

app_require('interfaces/system_search_intent_parser_i.php');
app_require('classes/system_search_cache.php');
app_require('classes/system_search_openai_intent_parser.php');

use classes\system_search_cache;
use classes\system_search_openai_intent_parser;

if (!class_exists('SystemSearchTestRedisAdapter')) {
    class SystemSearchTestRedisAdapter
    {
        private array $store = [];

        public function get(string $key): mixed
        {
            return $this->store[$key] ?? null;
        }

        public function set(string $key, string $value): void
        {
            $this->store[$key] = $value;
        }

        public function setEx(string $key, string $value, int $ttl): void
        {
            $this->store[$key] = $value;
        }

        public function delete(string $key): void
        {
            unset($this->store[$key]);
        }

        public function expire(string $key, int $ttl): void
        {
            // TTL is not simulated in this test adapter.
        }

        public function set_array(string $key, array $value): void
        {
            $this->store[$key] = json_encode($value, JSON_UNESCAPED_UNICODE);
        }

        public function get_array(string $key): ?array
        {
            $value = $this->store[$key] ?? null;
            if (!is_string($value)) {
                return null;
            }
            $decoded = json_decode($value, true);
            return is_array($decoded) ? $decoded : null;
        }

        public function clear_keys(string $pattern): void
        {
            $regex = '/^' . str_replace('\*', '.*', preg_quote($pattern, '/')) . '$/';
            foreach (array_keys($this->store) as $key) {
                if (preg_match($regex, $key)) {
                    unset($this->store[$key]);
                }
            }
        }
    }
}

beforeEach(function (): void {
    system_search_cache::setAdapterForTests(new SystemSearchTestRedisAdapter());
});

afterEach(function (): void {
    system_search_cache::setAdapterForTests(null);
});

it('reuses parser cache entries for repeated natural-language intent requests', function (): void {
    $calls = 0;
    $parser = new system_search_openai_intent_parser(
        function (array $payload, string $apiKey) use (&$calls): array {
            $calls++;
            return [
                'output' => [
                    [
                        'content' => [
                            [
                                'text' => json_encode([
                                    'success' => true,
                                    'normalized_query' => 'acme unpaid invoices',
                                    'aliases' => ['acme'],
                                    'entity_hints' => ['invoices'],
                                    'confidence' => 0.91,
                                    'association_hint' => true,
                                ], JSON_UNESCAPED_UNICODE),
                            ],
                        ],
                    ],
                ],
            ];
        },
        true,
        'test-key'
    );

    $first = $parser->parse('find unpaid invoices for acme', ['invoices', 'customers']);
    $second = $parser->parse('find unpaid invoices for acme', ['invoices', 'customers']);

    expect($first['source'])->toBe('openai');
    expect($second['source'])->toBe('cache');
    expect($calls)->toBe(1);
});

it('clears parser cache namespace via clearAll to force a fresh parse', function (): void {
    $calls = 0;
    $parser = new system_search_openai_intent_parser(
        function (array $payload, string $apiKey) use (&$calls): array {
            $calls++;
            return [
                'output' => [
                    [
                        'content' => [
                            [
                                'text' => json_encode([
                                    'success' => true,
                                    'normalized_query' => 'acme invoices',
                                    'aliases' => ['acme'],
                                    'entity_hints' => ['invoices'],
                                    'confidence' => 0.8,
                                    'association_hint' => false,
                                ], JSON_UNESCAPED_UNICODE),
                            ],
                        ],
                    ],
                ],
            ];
        },
        true,
        'test-key'
    );

    $parser->parse('acme invoices', ['invoices']);
    system_search_cache::clearAll();
    $result = $parser->parse('acme invoices', ['invoices']);

    expect($result['source'])->toBe('openai');
    expect($calls)->toBe(2);
});

it('invalidates query cache immediately when dirty-table marker is registered', function (): void {
    $hash = md5('test-query');
    system_search_cache::setQuery($hash, ['results' => [], 'grouped_results' => [], 'meta' => []], 120);
    expect(system_search_cache::getQuery($hash))->not->toBeNull();

    system_search_cache::markDirtyTable('orders');
    $dirty = system_search_cache::consumeDirtyTables();

    expect(system_search_cache::getQuery($hash))->toBeNull();
    expect($dirty)->toContain('orders');
});