<?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 reset(): void
        {
            $this->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 unit tests.
        }

        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('redacts obvious sensitive fragments before sending query to intent parser', function (): void {
    $query = 'Contact alice@example.com at +45 12 34 56 78, cvr 12345678, order 987654, reg AB12345, id 550e8400-e29b-41d4-a716-446655440000';
    $redacted = system_search_openai_intent_parser::redactSensitiveQuery($query);

    expect($redacted)->toContain('[email]');
    expect($redacted)->toContain('[phone]');
    expect($redacted)->toContain('[cvr]');
    expect($redacted)->toContain('order [id]');
    expect($redacted)->toContain('[plate]');
    expect($redacted)->toContain('[uuid]');
    expect($redacted)->not->toContain('alice@example.com');
    expect($redacted)->not->toContain('12345678');
    expect($redacted)->not->toContain('987654');
    expect($redacted)->not->toContain('AB12345');
});

it('builds payload with redacted query and parses strict JSON output', function (): void {
    $capturedPrompt = '';
    $parser = new system_search_openai_intent_parser(
        function (array $payload, string $apiKey) use (&$capturedPrompt): array {
            $capturedPrompt = (string)($payload['input'][0]['content'][0]['text'] ?? '');
            return [
                'output' => [
                    [
                        'content' => [
                            [
                                'text' => json_encode([
                                    'success' => true,
                                    'normalized_query' => 'acme unpaid invoices',
                                    'aliases' => ['acme', 'invoice overdue'],
                                    'entity_hints' => ['customers', 'invoices'],
                                    'confidence' => 0.93,
                                    'association_hint' => true,
                                ], JSON_UNESCAPED_UNICODE),
                            ],
                        ],
                    ],
                ],
            ];
        },
        true,
        'test-key'
    );

    $result = $parser->parse(
        'find unpaid invoices for alice@example.com',
        ['customers', 'invoices'],
        ['customers' => ['account'], 'invoices' => ['billing']]
    );

    expect($capturedPrompt)->toContain('[email]');
    expect($capturedPrompt)->not->toContain('alice@example.com');
    expect($result['success'])->toBeTrue();
    expect($result['source'])->toBe('openai');
    expect($result['confidence'])->toBe(0.93);
    expect($result['entity_hints'])->toBe(['customers', 'invoices']);
});

it('falls back safely when OpenAI is disabled', function (): void {
    $parser = new system_search_openai_intent_parser(null, false, null);
    $result = $parser->parse('find acme invoices', ['customers', 'invoices']);

    expect($result['success'])->toBeFalse();
    expect($result['source'])->toBe('none');
    expect($result['fallback_reason'])->toBe('openai_disabled');
});

it('handles malformed OpenAI response payloads without throwing', function (): void {
    $parser = new system_search_openai_intent_parser(
        function (array $payload, string $apiKey): array {
            return ['output' => []];
        },
        true,
        'test-key'
    );

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

    expect($result['success'])->toBeFalse();
    expect($result['source'])->toBe('openai');
    expect((string)$result['fallback_reason'])->toContain('Invalid response format');
});

it('uses parser cache for identical query and allowed type combinations', 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'
    );

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

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

it('caps alias and hint payloads from OpenAI and filters hints to allowed types', function (): void {
    $manyAliases = [];
    for ($i = 0; $i < 40; $i++) {
        $manyAliases[] = 'ALIAS_' . $i . '_' . str_repeat('x', 90);
    }

    $parser = new system_search_openai_intent_parser(
        function (array $payload, string $apiKey) use ($manyAliases): array {
            return [
                'output' => [
                    [
                        'content' => [
                            [
                                'text' => json_encode([
                                    'success' => true,
                                    'normalized_query' => str_repeat('q', 500),
                                    'aliases' => $manyAliases,
                                    'entity_hints' => ['orders', 'invoices', 'made_up_type'],
                                    'confidence' => 0.7,
                                    'association_hint' => false,
                                    'fallback_reason' => null,
                                ], JSON_UNESCAPED_UNICODE),
                            ],
                        ],
                    ],
                ],
            ];
        },
        true,
        'test-key'
    );

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

    expect(count($result['aliases']))->toBeLessThanOrEqual(12);
    $longestAlias = 0;
    foreach ($result['aliases'] as $alias) {
        $longestAlias = max($longestAlias, mb_strlen((string)$alias));
    }
    expect($longestAlias)->toBeLessThanOrEqual(64);
    expect(mb_strlen((string)$result['normalized_query']))->toBeLessThanOrEqual(256);
    expect($result['entity_hints'])->toBe(['orders', 'invoices']);
});