<?php

declare(strict_types=1);

namespace Dragwyb\Form_Builder\Includes\Modules\Fields;

use Dragwyb\Form_Builder\Includes\Controls\Controls;
use Dragwyb\Form_Builder\Includes\Rest_Routes\Form_Submission_Handler;

class Field_File extends Field_Base {

	public function __construct() {
		parent::__construct();
	}

	protected function init(): void {
		$this->type     = 'file';
		$this->name     = __( 'File Upload', 'smart-form-builder-by-dragwyb' );
		$this->icon     = 'fas fa-upload';
		$this->category = 'advanced-fields';
		$this->keywords = array( 'upload', 'document', 'image', 'attachment' );
	}

	protected function register_field_controls(): void {
		$this->start_section(
			'section_content_general',
			array(
				'label' => __( 'Basic Settings', 'smart-form-builder-by-dragwyb' ),
				'tab'   => self::ContentTab,
			)
		);

		$this->add_control(
			'label',
			array(
				'type'    => Controls::TEXT,
				'label'   => __( 'Field Label', 'smart-form-builder-by-dragwyb' ),
				'default' => __( 'Upload File', 'smart-form-builder-by-dragwyb' ),
			)
		);

		$this->add_control(
			'label_icon',
			array(
				'type'  => Controls::ICON,
				'label' => __( 'Label Icon', 'smart-form-builder-by-dragwyb' ),
			)
		);

		$this->add_control(
			'help_text',
			array(
				'type'        => Controls::TEXTAREA,
				'label'       => __( 'Instructional Text', 'smart-form-builder-by-dragwyb' ),
				'rows'        => 3,
				'description' => __( 'A short hint displayed below the input.', 'smart-form-builder-by-dragwyb' ),
			)
		);

		$this->end_section();

		$this->start_section(
			'section_content_validation',
			array(
				'label' => __( 'Validation Rules', 'smart-form-builder-by-dragwyb' ),
				'tab'   => self::ContentTab,
			)
		);

		$this->add_control(
			'required',
			array(
				'type'         => Controls::SWITCHER,
				'label'        => __( 'Is Required?', 'smart-form-builder-by-dragwyb' ),
				'return_value' => 'yes',
				'default'      => 'no',
			)
		);

		$this->add_control(
			'free_limit_notice',
			array(
				'type' => Controls::RAW_HTML,
				'raw'  => '<div style="background-color: #f0f9ff; border: 1px solid #bae6fd; padding: 10px; border-radius: 4px; font-size: 12px; margin-top: 10px;">' .
					'<strong>Free Version Limits:</strong><br/>' .
					'- Max File Size: 2MB<br/>' .
					'- Allowed Extensions: jpg, jpeg, png, pdf, doc, docx, txt<br/>' .
					'- Max Files: 1' .
					'</div>',
			)
		);

		$this->end_section();

		// Label Style
		$this->start_section(
			'section_style_label',
			array(
				'label' => __( 'Label Appearance', 'smart-form-builder-by-dragwyb' ),
				'tab'   => self::StyleTab,
			)
		);

		$this->add_control(
			'label_color',
			array(
				'type'      => Controls::COLOR,
				'label'     => __( 'Color', 'smart-form-builder-by-dragwyb' ),
				'selectors' => array( '{{WRAPPER}}' => '--dragwyb-label-color: {{VALUE}};' ),
			)
		);

		$this->add_control(
			'label_spacing',
			array(
				'type'      => Controls::SLIDER,
				'label'     => __( 'Bottom Margin', 'smart-form-builder-by-dragwyb' ),
				'range'     => array(
					'px' => array(
						'min' => 0,
						'max' => 50,
					),
				),
				'selectors' => array( '{{WRAPPER}}' => '--dragwyb-label-spacing: {{VALUE}}{{UNIT}};' ),
			)
		);

		$this->end_section();

		$this->start_section(
			'section_style_input',
			array(
				'label' => __( 'Input Box Style', 'smart-form-builder-by-dragwyb' ),
				'tab'   => self::StyleTab,
			)
		);

		$this->start_tabs( 'tabs_input_style' );

		$this->start_tab( 'tab_input_normal', array( 'label' => __( 'Normal', 'smart-form-builder-by-dragwyb' ) ) );

		$this->add_control(
			'input_bg_color',
			array(
				'type'      => Controls::COLOR,
				'label'     => __( 'Background Color', 'smart-form-builder-by-dragwyb' ),
				'selectors' => array( '{{WRAPPER}}' => '--dragwyb-input-bg: {{VALUE}};' ),
			)
		);

		$this->add_control(
			'input_text_color',
			array(
				'type'      => Controls::COLOR,
				'label'     => __( 'Text Color', 'smart-form-builder-by-dragwyb' ),
				'selectors' => array( '{{WRAPPER}}' => '--dragwyb-input-color: {{VALUE}};' ),
			)
		);

		$this->add_group_control(
			'input_border',
			array(
				'type'     => Controls::GROUP_BORDER,
				'selector' => '{{WRAPPER}}',
				'prefix'   => 'input',
			)
		);

		$this->add_control(
			'input_padding',
			array(
				'type'       => Controls::DIMENSIONS,
				'label'      => __( 'Inner Padding', 'smart-form-builder-by-dragwyb' ),
				'size_units' => array( 'px', 'em', '%' ),
				'selectors'  => array( '{{WRAPPER}}' => '--dragwyb-input-pt: {{TOP}}{{UNIT}}; --dragwyb-input-pr: {{RIGHT}}{{UNIT}}; --dragwyb-input-pb: {{BOTTOM}}{{UNIT}}; --dragwyb-input-pl: {{LEFT}}{{UNIT}};' ),
				'separator'  => 'before',
			)
		);

		$this->end_tab();

		$this->start_tab( 'tab_input_focus', array( 'label' => __( 'Focus', 'smart-form-builder-by-dragwyb' ) ) );

		$this->add_control(
			'input_focus_border_color',
			array(
				'type'      => Controls::COLOR,
				'label'     => __( 'Active Border Color', 'smart-form-builder-by-dragwyb' ),
				'selectors' => array( '{{WRAPPER}}' => '--dragwyb-input-focus-border: {{VALUE}};' ),
			)
		);

		$this->end_tab();

		$this->end_tabs();

		$this->end_section();
	}

	protected function render_field() {
		$settings = $this->get_field_settings();
		$id       = $this->get_the_id();
		$field_id = $this->field_key_exist( $settings, 'field_id', $id );
		$label    = $this->field_key_exist( $settings, 'label', 'Upload File' );
		$help     = $this->field_key_exist( $settings, 'help_text', '' );
		$required = $this->field_key_exist( $settings, 'required', '' ) === 'yes';
		$classes  = $this->field_key_exist( $settings, 'css_classes', '' );

		$this->add_field_attributes(
			'wrapper',
			array(
				'id'    => $this->field_wrapper_id( $id ),
				'class' => $this->field_wrapper_class( $classes, $settings ) . ' dragwyb-no-float',
			)
		);

		$this->add_field_attributes(
			'input',
			array(
				'type'   => 'file',
				'id'     => $field_id,
				'name'   => $field_id,
				'class'  => 'dragwyb-field-input dragwyb-file-input',
				'accept' => '.jpg,.jpeg,.png,.pdf,.doc,.docx,.txt',
			)
		);
		?>
		<div <?php $this->render_field_attributes( 'wrapper' ); ?>>
			<div class="dragwyb-input-group dragwyb-file-upload-group">
				<?php if ( ! empty( $label ) ) : ?>
					<?php $this->render_field_label( $field_id, $label, $required, $settings ); ?>
				<?php endif; ?>
				<input 
				<?php
				$this->render_field_attributes( 'input' );
				echo $required ? 'required' : '';
				?>
				/>
			</div>
			<?php if ( ! empty( $help ) ) : ?>
				<div class="dragwyb-field-help"><?php echo wp_kses_post( $help ); ?></div>
			<?php endif; ?>
		</div>
		<?php
	}

	public function validate( $value, $field_id, $form_config, Form_Submission_Handler $error_handler ): void {
		if ( ! isset( $form_config['fields'][ $field_id ] ) ) {
			$error_handler->add_error( $field_id, __( 'Invalid field.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}
		$field_attr = isset( $form_config['fields'][ $field_id ]['attributes'] ) ? $form_config['fields'][ $field_id ]['attributes'] : array();

		// Check if file was uploaded
		// phpcs:ignore WordPress.Security.NonceVerification.Missing -- Nonce is verified in the submission handler class.
		$file_exists = isset( $_FILES[ $field_id ] ) && isset( $_FILES[ $field_id ]['error'] ) && $_FILES[ $field_id ]['error'] !== UPLOAD_ERR_NO_FILE;

		if ( ! $file_exists && ( isset( $field_attr['required'] ) && $field_attr['required'] == 'yes' ) ) {
			$error_handler->add_error( $field_id, __( 'This field is required.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}

		if ( ! $file_exists ) {
			return;
		}

		// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Nonce is verified in the submission handler class, file parameters are checked and validated individually below.
		$file = $_FILES[ $field_id ];

		// 1. Check for upload errors
		if ( $file['error'] !== UPLOAD_ERR_OK ) {
			$error_handler->add_error( $field_id, __( 'Error uploading file.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}

		// 2. Max File Size: 1MB (1048576 bytes)
		$max_size = 1 * 1024 * 1024;
		if ( $file['size'] > $max_size ) {
			$error_handler->add_error( $field_id, __( 'File size exceeds the 1MB limit for the free version.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}

		// 3. Allowed Extensions
		$allowed_exts = array( 'jpg', 'jpeg', 'png', 'pdf', 'doc', 'docx', 'txt' );
		$file_ext     = strtolower( pathinfo( $file['name'], PATHINFO_EXTENSION ) );

		if ( ! in_array( $file_ext, $allowed_exts, true ) ) {
			$error_handler->add_error( $field_id, __( 'Invalid file type. Allowed types: jpg, jpeg, png, pdf, doc, docx, txt.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}

		// Mime type check for added security
		$mime_type     = mime_content_type( $file['tmp_name'] );
		$allowed_mimes = array(
			'image/jpeg',
			'image/png',
			'application/pdf',
			'text/plain',
		);

		if ( ! in_array( $mime_type, $allowed_mimes, true ) ) {
			$error_handler->add_error( $field_id, __( 'Invalid file mime type.', 'smart-form-builder-by-dragwyb' ) );
			return;
		}
	}

	/**
	 * Sanitize the field value.
	 *
	 * @param mixed $value The value to sanitize.
	 * @return mixed Sanitized value.
	 */
	public function sanitize( $value = null ) {
		// For files, the sanitization and actual saving/moving usually happen during a dedicated submission step
		// Returning the file path or name or an empty string for now
		if ( isset( $value['name'] ) ) {
			return sanitize_file_name( $value['name'] );
		}
		return null;
	}
}
