<?php

namespace App\RSpade\Commands\Migrate;

use App\Console\Commands\FrameworkDeveloperCommand;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Facades\DB;
use App\RSpade\Core\Manifest\Manifest;

class Document_Models_Command extends FrameworkDeveloperCommand
{
    protected $signature = 'rsx:migrate:document_models
                            {--dry-run : Show what would be changed without modifying files}';

    protected $description = 'Generate IDE type hints and enum constants for RSX models based on database schema';

    /**
     * Type mapping from database types to PHP types
     */
    protected $typeMap = [
        'bigint' => 'int',
        'int' => 'int',
        'integer' => 'int',
        'tinyint' => 'int',
        'smallint' => 'int',
        'mediumint' => 'int',
        'decimal' => 'float',
        'float' => 'float',
        'double' => 'float',
        'real' => 'float',
        'boolean' => 'bool',
        'date' => 'string',
        'datetime' => 'string',
        'timestamp' => 'string',
        'time' => 'string',
        'year' => 'int',
        'char' => 'string',
        'varchar' => 'string',
        'text' => 'string',
        'mediumtext' => 'string',
        'longtext' => 'string',
        'json' => 'array',
        'jsonb' => 'array',
        'blob' => 'string',
        'binary' => 'string',
    ];

    public function handle()
    {
        if (app()->environment('production')) {
            $this->error('This command cannot be run in production environment');
            return 1;
        }

        $this->info('Discovering RSX models from manifest...');

        // Use Manifest to discover all models extending Rsx_Model_Abstract
        $manifest_data = Manifest::php_get_extending('App\RSpade\Core\Database\Models\Rsx_Model_Abstract');

        $models = [];
        foreach ($manifest_data as $key => $class_info) {
            // The key is the class name, the info contains 'file', 'fqcn', etc.
            $className = $class_info['fqcn'] ?? $class_info['class'] ?? null;
            $filePath = $class_info['file'] ?? null;

            if (!$className || !$filePath) {
                continue;
            }

            // Skip abstract classes
            if (isset($class_info['is_abstract']) && $class_info['is_abstract']) {
                continue;
            }

            // Skip the base abstract classes themselves
            if (in_array($className, [
                'App\RSpade\Core\Database\Models\Rsx_Model_Abstract',
                'App\RSpade\Core\Database\Models\Rsx_Site_Model_Abstract',
                'App\RSpade\Core\Database\Models\Rsx_System_Model_Abstract'
            ])) {
                continue;
            }

            // Store the full path to the file (prepend project root if needed)
            $fullPath = base_path($filePath);
            if (!file_exists($fullPath)) {
                $this->warn("File not found: $fullPath");
                continue;
            }

            // Skip framework files (app/RSpade/) unless in framework developer mode
            // This prevents end users from accidentally modifying framework source
            if (str_starts_with($filePath, 'app/RSpade/') && !config('rsx.code_quality.is_framework_developer', false)) {
                continue;
            }

            $models[$className] = $fullPath;
        }

        $this->info('Found ' . count($models) . ' models to process');

        $processedCount = 0;
        $errorCount = 0;

        foreach ($models as $className => $filePath) {
            try {
                $this->processModel($className, $filePath);
                $processedCount++;
            } catch (\Exception $e) {
                $errorCount++;
                $this->error("Error processing $className: " . $e->getMessage());
            }
        }

        $this->info("Completed: $processedCount models processed, $errorCount errors");

        return $errorCount > 0 ? 1 : 0;
    }

    protected function processModel($className, $filePath)
    {
        $this->info("Processing: $className");

        // Ensure class is loaded
        if (!class_exists($className)) {
            throw new \Exception("Class $className not found");
        }

        // Instantiate model to get table name
        $model = new $className();
        $tableName = $model->getTable();

        if (!$tableName) {
            throw new \Exception("Could not determine table name for $className");
        }

        // Get column information
        $columns = Schema::getColumnListing($tableName);
        if (empty($columns)) {
            $this->warn("  No columns found for table $tableName");
            return;
        }

        // Build property annotations
        $properties = [];

        foreach ($columns as $column) {
            try {
                $type = DB::getSchemaBuilder()->getColumnType($tableName, $column);
                $phpType = $this->mapDatabaseTypeToPhp($type);

                // Note: Type casting (boolean, datetime, date, time) is handled automatically
                // by getCasts() in Rsx_Model_Abstract via manifest metadata.
                // No need to generate $casts arrays in model files.

                $properties[] = " * @property $phpType \$$column";
            } catch (\Exception $e) {
                $this->warn("  Could not determine type for column $column: " . $e->getMessage());
                $properties[] = " * @property mixed \$$column";
            }
        }

        // Process enums if they exist
        $enumConstants = [];
        $enumProperties = [];
        $enumMethods = [];

        if (property_exists($className, 'enums') && !empty($className::$enums)) {
            foreach ($className::$enums as $columnName => $enumDefinitions) {
                // Add enum accessor properties
                $enumProperties[] = " * @property-read string \${$columnName}_label";
                $enumProperties[] = " * @property-read string \${$columnName}_constant";
                $enumProperties[] = " * @property-read array \${$columnName}_enum_val";

                // Add enum static methods
                $enumMethods[] = " * @method static array {$columnName}_enum()";
                $enumMethods[] = " * @method static array {$columnName}_enum_select()";
                $enumMethods[] = " * @method static array {$columnName}_enum_ids()";

                // Generate constants for each enum value
                foreach ($enumDefinitions as $value => $definition) {
                    if (isset($definition['constant'])) {
                        $constantName = $definition['constant'];
                        $enumConstants[] = "    const $constantName = $value;";
                    }
                }
            }
        }

        // Build the complete DocBlock
        $docBlock = "/**\n";
        $docBlock .= " * _AUTO_GENERATED_ Database type hints - do not edit manually\n";
        $docBlock .= " * Generated on: " . date('Y-m-d H:i:s') . "\n";
        $docBlock .= " * Table: $tableName\n";
        $docBlock .= " *\n";

        // Add property annotations
        if (!empty($properties)) {
            $docBlock .= implode("\n", $properties) . "\n";
        }

        // Add enum properties
        if (!empty($enumProperties)) {
            $docBlock .= " *\n";
            $docBlock .= implode("\n", $enumProperties) . "\n";
        }

        // Add enum methods
        if (!empty($enumMethods)) {
            $docBlock .= " *\n";
            $docBlock .= implode("\n", $enumMethods) . "\n";
        }

        // Add Eloquent mixin for IDE support
        $docBlock .= " *\n";
        $docBlock .= " * @mixin \\Eloquent\n";
        $docBlock .= " */";

        // Build enum constants block if needed
        $constantsBlock = '';
        if (!empty($enumConstants)) {
            $constantsBlock = "\n    /**\n";
            $constantsBlock .= "     * _AUTO_GENERATED_ Enum constants\n";
            $constantsBlock .= "     */\n";
            $constantsBlock .= implode("\n", $enumConstants) . "\n";
        }

        // Now modify the file
        $this->updateModelFile($filePath, $className, $docBlock, $constantsBlock);
    }

    protected function updateModelFile($filePath, $className, $docBlock, $constantsBlock)
    {
        $content = file_get_contents($filePath);

        if ($this->option('dry-run')) {
            $this->info("  [DRY-RUN] Would update $filePath");
            $this->line("  DocBlock to add:");
            $this->line($docBlock);
            if ($constantsBlock) {
                $this->line("  Constants to add:");
                $this->line($constantsBlock);
            }
            return;
        }

        // Remove existing auto-generated sections
        $content = preg_replace(
            '/\/\*\*\s*\n\s*\*\s*_AUTO_GENERATED_.*?\*\/\s*\n/s',
            '',
            $content
        );

        // Remove existing auto-generated dates array (deprecated)
        $content = preg_replace(
            '/\s*\/\*\*\s*\n\s*\*\s*_AUTO_GENERATED_\s*Date columns.*?\];/s',
            '',
            $content
        );

        // Remove existing auto-generated casts array (no longer generated)
        $content = preg_replace(
            '/\s*\/\*\*\s*\n\s*\*\s*_AUTO_GENERATED_\s*Type casts.*?\];/s',
            '',
            $content
        );

        // Remove existing auto-generated constants
        $content = preg_replace(
            '/\s*\/\*\*\s*\n\s*\*\s*_AUTO_GENERATED_\s*Enum constants.*?\n(?:\s*const\s+\w+\s*=\s*[^;]+;\n)+/s',
            '',
            $content
        );

        // Remove duplicate constant declarations that match what we're about to generate
        // This cleans up any manual or leftover constants that duplicate the auto-generated ones
        if ($constantsBlock) {
            // Extract each constant line from the block we're about to add
            preg_match_all('/const\s+\w+\s*=\s*[^;]+;/', $constantsBlock, $matches);
            foreach ($matches[0] as $constantLine) {
                $trimmedConstant = trim($constantLine);
                // Remove any lines in the file that match this exact constant declaration
                $content = preg_replace(
                    '/^\s*' . preg_quote($trimmedConstant, '/') . '\s*$/m',
                    '',
                    $content
                );
            }
            // Clean up any resulting multiple blank lines
            $content = preg_replace('/\n{3,}/', "\n\n", $content);
        }

        // Find the class declaration
        $classPattern = '/(^|\n)((?:abstract\s+)?class\s+' . preg_quote(class_basename($className), '/') . '\s+extends\s+[^\{]+)\s*\{/';

        if (!preg_match($classPattern, $content, $matches, PREG_OFFSET_CAPTURE)) {
            throw new \Exception("Could not find class declaration in $filePath");
        }

        $classDeclarationStart = $matches[0][1];
        $classOpeningBrace = $classDeclarationStart + strlen($matches[0][0]) - 1;

        // Insert DocBlock before class declaration
        $beforeClass = substr($content, 0, $matches[1][1] + strlen($matches[1][0]));
        $classDeclaration = $matches[2][0];
        $afterClassDeclaration = substr($content, $classOpeningBrace);

        // Build the new content
        $newContent = $beforeClass . $docBlock . "\n" . $classDeclaration . " {";

        // Add constants right after opening brace
        if ($constantsBlock) {
            $newContent .= $constantsBlock;
        }

        // Add the rest of the file
        $newContent .= substr($afterClassDeclaration, 1); // Skip the opening brace we already added

        // Write the file
        file_put_contents($filePath, $newContent);
        $this->info("  Updated $filePath");
    }

    protected function mapDatabaseTypeToPhp($dbType)
    {
        $dbType = strtolower($dbType);

        // Handle types with parentheses (e.g., "varchar(255)")
        if (preg_match('/^(\w+)/', $dbType, $matches)) {
            $dbType = $matches[1];
        }

        return $this->typeMap[$dbType] ?? 'mixed';
    }
}