<?php

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use App\Framework\LiveComponents\Exceptions\StateValidationException;
use App\Framework\LiveComponents\Validation\DefaultStateValidator;
use App\Framework\LiveComponents\Validation\DerivedSchema;
use App\Framework\LiveComponents\Validation\SchemaCache;
use App\Framework\LiveComponents\ValueObjects\ComponentData;

echo "=== State Validation Test ===\n\n";

// Setup
$validator = new DefaultStateValidator();
$schemaCache = new SchemaCache();

// Create a User class for testing
$userClass = new class () {
    public string $name = 'John';
};

// Test 1: Schema Derivation from Data
echo "Test 1: Schema Derivation from Data\n";
echo "------------------------------------\n";
$data = ComponentData::fromArray([
    'count' => 0,
    'items' => ['a', 'b'],
    'user' => $userClass,
    'metadata' => null,
]);

$schema = $validator->deriveSchema($data);
echo "✓ Schema derived successfully\n";
echo "  Fields: " . json_encode($schema->toArray()) . "\n";
echo "  Field count: " . $schema->getFieldCount() . "\n";

// Test 2: Valid State Validation
echo "\nTest 2: Valid State Validation\n";
echo "-------------------------------\n";
$newData = ComponentData::fromArray([
    'count' => 5,
    'items' => ['c', 'd', 'e'],
    'user' => $userClass,  // Same user class instance
    'metadata' => null,
]);

try {
    $validator->validate($newData, $schema);
    echo "✓ Valid state passed validation\n";
} catch (StateValidationException $e) {
    echo "✗ Unexpected validation error: " . $e->getMessage() . "\n";
    exit(1);
}

// Test 3: Type Mismatch Detection
echo "\nTest 3: Type Mismatch Detection\n";
echo "--------------------------------\n";
$invalidData = ComponentData::fromArray([
    'count' => 'five',  // String instead of int
    'items' => ['a', 'b'],
    'user' => $userClass,
    'metadata' => null,
]);

try {
    $validator->validate($invalidData, $schema);
    echo "✗ Should have thrown StateValidationException!\n";
    exit(1);
} catch (StateValidationException $e) {
    echo "✓ Correctly detected type mismatch\n";
    echo "  Error: " . $e->getUserMessage() . "\n";
    echo "  Field: " . ($e->getField() ?? 'N/A') . "\n";
}

// Test 4: Missing Required Field
echo "\nTest 4: Missing Required Field\n";
echo "-------------------------------\n";
$incompleteData = ComponentData::fromArray([
    'count' => 10,
    // 'items' missing
    'user' => $userClass,
    'metadata' => null,
]);

try {
    $validator->validate($incompleteData, $schema);
    echo "✗ Should have thrown StateValidationException!\n";
    exit(1);
} catch (StateValidationException $e) {
    echo "✓ Correctly detected missing field\n";
    echo "  Error: " . $e->getUserMessage() . "\n";
    echo "  Field: " . ($e->getField() ?? 'N/A') . "\n";
}

// Test 5: Unexpected Field
echo "\nTest 5: Unexpected Field\n";
echo "------------------------\n";
$extraFieldData = ComponentData::fromArray([
    'count' => 0,
    'items' => ['a', 'b'],
    'user' => $userClass,
    'metadata' => null,
    'extra_field' => 'unexpected',  // Not in original schema
]);

try {
    $validator->validate($extraFieldData, $schema);
    echo "✗ Should have thrown StateValidationException!\n";
    exit(1);
} catch (StateValidationException $e) {
    echo "✓ Correctly detected unexpected field\n";
    echo "  Error: " . $e->getUserMessage() . "\n";
    echo "  Field: " . ($e->getField() ?? 'N/A') . "\n";
}

// Test 6: SchemaCache Functionality
echo "\nTest 6: SchemaCache Functionality\n";
echo "----------------------------------\n";
$componentClass = 'App\\Test\\TestComponent';

echo "  Checking cache (should be empty): " . ($schemaCache->has($componentClass) ? 'cached' : 'not cached') . "\n";

$schemaCache->set($componentClass, $schema);
echo "  After set: " . ($schemaCache->has($componentClass) ? 'cached' : 'not cached') . "\n";

$cachedSchema = $schemaCache->get($componentClass);
if ($cachedSchema !== null && $cachedSchema->toArray() === $schema->toArray()) {
    echo "✓ SchemaCache correctly stores and retrieves schemas\n";
} else {
    echo "✗ SchemaCache retrieval failed\n";
    exit(1);
}

$stats = $schemaCache->getStats();
echo "  Cache stats: " . $stats['cached_count'] . " schema(s) cached\n";

$schemaCache->clear($componentClass);
echo "  After clear: " . ($schemaCache->has($componentClass) ? 'cached' : 'not cached') . "\n";

// Test 7: DerivedSchema Helper Methods
echo "\nTest 7: DerivedSchema Helper Methods\n";
echo "-------------------------------------\n";
echo "  Has 'count' field: " . ($schema->hasField('count') ? 'yes' : 'no') . "\n";
echo "  Has 'nonexistent' field: " . ($schema->hasField('nonexistent') ? 'yes' : 'no') . "\n";
echo "  Type of 'count': " . ($schema->getType('count') ?? 'N/A') . "\n";
echo "  Is 'metadata' nullable: " . ($schema->isNullable('metadata') ? 'yes' : 'no') . "\n";
echo "  Is 'count' nullable: " . ($schema->isNullable('count') ? 'yes' : 'no') . "\n";
echo "  All fields: " . json_encode($schema->getFields()) . "\n";
echo "✓ DerivedSchema helper methods work correctly\n";

// Test 8: ValidationResult for non-throwing checks
echo "\nTest 8: ValidationResult for Non-Throwing Checks\n";
echo "-------------------------------------------------\n";
$result = $validator->check($newData, $schema);
if ($result->isValid()) {
    echo "✓ Valid data check returns valid result\n";
    echo "  Error count: " . $result->getErrorCount() . "\n";
} else {
    echo "✗ Valid data should pass check\n";
    exit(1);
}

$result = $validator->check($invalidData, $schema);
if ($result->isFailed()) {
    echo "✓ Invalid data check returns failed result\n";
    echo "  Error count: " . $result->getErrorCount() . "\n";
    echo "  Errors: " . json_encode($result->getErrors()) . "\n";
    echo "  Field errors: " . json_encode($result->getFieldErrors()) . "\n";
} else {
    echo "✗ Invalid data should fail check\n";
    exit(1);
}

echo "\n=== All Tests Passed! ===\n";
echo "\nSummary:\n";
echo "  ✓ Schema derivation from component data\n";
echo "  ✓ Valid state passes validation\n";
echo "  ✓ Type mismatch detection\n";
echo "  ✓ Missing field detection\n";
echo "  ✓ Unexpected field detection\n";
echo "  ✓ SchemaCache stores and retrieves schemas\n";
echo "  ✓ DerivedSchema helper methods\n";
echo "  ✓ ValidationResult for non-throwing checks\n";
echo "\nState Validation Implementation: COMPLETE\n";