<?php

declare(strict_types=1);

namespace App\Services;

use Exception;

require_once __DIR__ . '/../Utils/Helpers.php';

class Renderer
{
	private FileStorage $storage;
	private string $exportsPath;
	private string $templatesPath;

	private array $palettes = [
		'blue-gray' => [
			'primary' => '#2563eb',
			'secondary' => '#64748b',
			'bg' => '#f8fafc',
			'text' => '#1e293b'
		],
		'nature-green' => [
			'primary' => '#059669',
			'secondary' => '#fbbf24',
			'bg' => '#fdfdfd',
			'text' => '#064e3b'
		],
		'elegant-gold' => [
			'primary' => '#d4af37',
			'secondary' => '#111827',
			'bg' => '#ffffff',
			'text' => '#111827'
		]
	];

	private array $styles = [
		'minimal' => [
			'radius' => '0px',
			'shadow' => 'none',
			'padding' => '4rem 1rem'
		],
		'modern' => [
			'radius' => '0.5rem',
			'shadow' => '0 4px 6px -1px rgb(0 0 0 / 0.1)',
			'padding' => '6rem 1.5rem'
		],
		'premium' => [
			'radius' => '1.5rem',
			'shadow' => '0 10px 15px -3px rgb(0 0 0 / 0.1)',
			'padding' => '8rem 2rem'
		]
	];

	public function __construct()
	{
		$this->storage = new FileStorage();
		$this->exportsPath = realpath(__DIR__ . '/../../exports');
		$this->templatesPath = realpath(__DIR__ . '/../Templates');
	}

	/**
	 * Renders a complete static website for a project.
	 */
	public function render(string $projectId): bool
	{
		$projectData = $this->storage->get("projects/{$projectId}.json");
		if (!$projectData || empty($projectData['content']['generated'])) {
			return false;
		}

		$projectExportDir = $this->exportsPath . DIRECTORY_SEPARATOR . $projectId;
		$assetsDir = $projectExportDir . DIRECTORY_SEPARATOR . 'assets';
		$cssDir = $assetsDir . DIRECTORY_SEPARATOR . 'css';
		$jsDir = $assetsDir . DIRECTORY_SEPARATOR . 'js';

		// 1. Create directory structure
		if (!is_dir($cssDir)) mkdir($cssDir, 0777, true);
		if (!is_dir($jsDir)) mkdir($jsDir, 0777, true);

		// 2. Copy static assets
		copy($this->templatesPath . '/css/site.css', $cssDir . '/site.css');
		copy($this->templatesPath . '/js/site.js', $jsDir . '/site.js');

		// 3. Handle Contact Form Logic
		$formConfig = $projectData['wizard_data']['modules']['contact_form'] ?? [];
		if (!empty($formConfig['enabled'])) {
			// Copy handler
			copy($this->templatesPath . '/emailer.php', $projectExportDir . '/ajax.php');
			
			// Create config for handler (PHP file is not web-accessible)
			$siteConfig = [
				'site_name' => $projectData['wizard_data']['identity']['business_name'],
				'form_mode' => $formConfig['mode'] ?? 'local',
				'smtp' => $formConfig['smtp'] ?? null,
				'local_password_hash' => $formConfig['local_viewer']['password_hash'] ?? null
			];
			
			$configContent = "<?php\nreturn " . var_export($siteConfig, true) . ";\n";
			file_put_contents($projectExportDir . '/config.php', $configContent);

			if (($siteConfig['form_mode'] ?? 'local') === 'local') {
				// Copy viewer
				copy($this->templatesPath . '/form-viewer.php', $projectExportDir . '/form-viewer.php');
				// Create messages dir
				$msgDir = $projectExportDir . '/messages';
				if (!is_dir($msgDir)) mkdir($msgDir, 0777, true);
				file_put_contents($msgDir . '/.htaccess', "Deny from all");
			}
		}

		// 4. Prepare relative paths for assets
		if (!empty($projectData['wizard_data']['assets']['logo'])) {
			$projectData['wizard_data']['assets']['logo'] = $this->makePathRelative($projectData['wizard_data']['assets']['logo'], $projectId);
		}
		if (!empty($projectData['wizard_data']['assets']['gallery'])) {
			foreach ($projectData['wizard_data']['assets']['gallery'] as $key => $path) {
				$projectData['wizard_data']['assets']['gallery'][$key] = $this->makePathRelative($path, $projectId);
			}
		}

		// 4. Render Content Sections
		$sectionsHtml = '';
		$selectedSections = $projectData['wizard_data']['modules']['sections'] ?? [];
		
		foreach ($selectedSections as $sectionId) {
			try {
				$sectionsHtml .= $this->renderTemplate("sections/{$sectionId}", [
					'project' => $projectData
				]);
			} catch (Exception $e) {
				error_log("Renderer: Failed to render section $sectionId: " . $e->getMessage());
			}
		}

		// 4. Prepare Visual Variables
		$visuals = $projectData['wizard_data']['visuals'] ?? [];
		$palette = $this->palettes[$visuals['palette'] ?? 'blue-gray'] ?? $this->palettes['blue-gray'];
		$style = $this->styles[$visuals['style'] ?? 'modern'] ?? $this->styles['modern'];

		// 5. Render HTML base template
		$html = $this->renderTemplate('base', [
			'project' => $projectData,
			'content' => $sectionsHtml,
			'css_vars' => [
				'primary' => $palette['primary'],
				'secondary' => $palette['secondary'],
				'bg' => $palette['bg'],
				'text' => $palette['text'],
				'radius' => $style['radius'],
				'shadow' => $style['shadow'],
				'padding' => $style['padding']
			]
		]);

		// 6. Save to exports
		return file_put_contents($projectExportDir . DIRECTORY_SEPARATOR . 'index.html', $html) !== false;
	}

	/**
	 * Makes an absolute or project-root relative path relative to the project's export directory.
	 */
	private function makePathRelative(string $path, string $projectId): string
	{
		$prefix = "exports/{$projectId}/";
		if (strpos($path, $prefix) === 0) {
			return substr($path, strlen($prefix));
		}
		return $path;
	}

	/**
	 * Internal helper to render a PHP template with variables.
	 */
	private function renderTemplate(string $templateName, array $vars = []): string
	{
		$templateFile = $this->templatesPath . DIRECTORY_SEPARATOR . $templateName . '.php';
		if (!file_exists($templateFile)) {
			throw new Exception("Template not found: $templateName");
		}

		extract($vars);
		ob_start();
		include $templateFile;
		return ob_get_clean();
	}
}