<?php
/**
 * Email notification system for job submissions
 *
 * @package DDHH_Job_Manager
 */

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

/**
 * Handles email notifications for job submissions
 */
class DDHH_JM_Notifications {

	/**
	 * Setup notification hooks
	 */
	public static function setup_hooks() {
		// Hook into post status transitions to detect new pending job submissions
		add_action( 'transition_post_status', array( __CLASS__, 'send_admin_new_job_notification' ), 10, 3 );

		// Hook into post status transitions to detect job deactivations
		add_action( 'transition_post_status', array( __CLASS__, 'send_admin_job_deactivation_notification' ), 10, 3 );
	}

	/**
	 * Send admin notification when a new job is submitted for moderation
	 *
	 * @param string  $new_status New post status.
	 * @param string  $old_status Old post status.
	 * @param WP_Post $post       Post object.
	 */
	public static function send_admin_new_job_notification( $new_status, $old_status, $post ) {
		// Only trigger on job_offer posts transitioning to pending
		if ( 'job_offer' !== $post->post_type ) {
			return;
		}

		// Only send notification on initial submission to pending
		// Avoid sending on every save when already pending
		if ( 'pending' !== $new_status || 'pending' === $old_status ) {
			return;
		}

		// Get admin email
		$admin_email = get_option( 'admin_email' );
		if ( ! $admin_email ) {
			error_log( 'DDHH Job Manager: Cannot send admin notification - admin_email option not set' );
			return;
		}

		// Prepare email data
		$job_title = $post->post_title;
		$author    = get_userdata( $post->post_author );
		$author_name = $author ? $author->display_name : 'Unbekannt';
		$author_org  = get_user_meta( $post->post_author, 'ddhh_org_name', true );
		if ( empty( $author_org ) ) {
			$author_org = 'Nicht angegeben';
		}

		// Get ACF fields
		$job_location = get_field( 'job_location', $post->ID );
		$job_type     = get_field( 'job_type', $post->ID );

		// Get submission date
		$submission_date = get_the_date( 'd.m.Y H:i', $post->ID );

		// Get edit link
		$edit_link = get_edit_post_link( $post->ID, '' );

		// Build email subject
		$subject = sprintf( 'Neues Stellenangebot zur Prüfung: %s', $job_title );

		// Build email body
		$body = sprintf(
			"Ein neues Stellenangebot wurde eingereicht und wartet auf Ihre Prüfung.\n\n" .
			"Titel: %s\n" .
			"Anbieter: %s (%s)\n" .
			"Standort: %s\n" .
			"Art: %s\n" .
			"Eingereicht am: %s\n\n" .
			"Prüfen Sie das Stellenangebot hier:\n%s\n\n" .
			"---\n" .
			"Diese E-Mail wurde automatisch gesendet.",
			$job_title,
			$author_name,
			$author_org,
			$job_location ? $job_location : 'Nicht angegeben',
			$job_type ? $job_type : 'Nicht angegeben',
			$submission_date,
			$edit_link
		);

		// Set email headers
		$headers = array( 'Content-Type: text/html; charset=UTF-8' );

		// Convert plain text to HTML with line breaks
		$html_body = nl2br( esc_html( $body ) );

		// Send email
		$sent = wp_mail( $admin_email, $subject, $html_body, $headers );

		// Log if email fails
		if ( ! $sent ) {
			error_log(
				sprintf(
					'DDHH Job Manager: Failed to send admin notification for job #%d "%s". Email may be disabled in Local WP environment.',
					$post->ID,
					$job_title
				)
			);
		}
	}

	/**
	 * Send admin notification when a job is deactivated by provider
	 *
	 * @param string  $new_status New post status.
	 * @param string  $old_status Old post status.
	 * @param WP_Post $post       Post object.
	 */
	public static function send_admin_job_deactivation_notification( $new_status, $old_status, $post ) {
		// Only trigger on job_offer posts transitioning from publish to draft
		if ( 'job_offer' !== $post->post_type ) {
			return;
		}

		// Only send notification when published job becomes draft (deactivation)
		// Avoid notification on draft saves or initial draft creation
		if ( 'draft' !== $new_status || 'publish' !== $old_status ) {
			return;
		}

		// Get admin email
		$admin_email = get_option( 'admin_email' );
		if ( ! $admin_email ) {
			error_log( 'DDHH Job Manager: Cannot send deactivation notification - admin_email option not set' );
			return;
		}

		// Prepare email data
		$job_title = $post->post_title;
		$author    = get_userdata( $post->post_author );
		$author_name = $author ? $author->display_name : 'Unbekannt';
		$author_org  = get_user_meta( $post->post_author, 'ddhh_org_name', true );
		if ( empty( $author_org ) ) {
			$author_org = 'Nicht angegeben';
		}

		// Get ACF fields
		$job_location = get_field( 'job_location', $post->ID );
		$job_type     = get_field( 'job_type', $post->ID );

		// Get deactivation reason from ACF field
		$deactivation_reason = get_field( 'job_deactivation_reason', $post->ID );
		if ( empty( $deactivation_reason ) ) {
			$deactivation_reason = 'Kein Grund angegeben';
		}

		// Get deactivation date
		$deactivation_date = current_time( 'd.m.Y H:i' );

		// Get edit link
		$edit_link = get_edit_post_link( $post->ID, '' );

		// Build email subject
		$subject = sprintf( 'Stellenangebot deaktiviert: %s', $job_title );

		// Build email body
		$body = sprintf(
			"Ein Stellenangebot wurde vom Anbieter deaktiviert.\n\n" .
			"Titel: %s\n" .
			"Anbieter: %s (%s)\n" .
			"Standort: %s\n" .
			"Art: %s\n" .
			"Deaktiviert am: %s\n\n" .
			"Grund für Deaktivierung:\n%s\n\n" .
			"Stelle ansehen:\n%s\n\n" .
			"---\n" .
			"Diese E-Mail wurde automatisch gesendet.",
			$job_title,
			$author_name,
			$author_org,
			$job_location ? $job_location : 'Nicht angegeben',
			$job_type ? $job_type : 'Nicht angegeben',
			$deactivation_date,
			$deactivation_reason ? $deactivation_reason : 'Nicht angegeben',
			$edit_link
		);

		// Set email headers
		$headers = array( 'Content-Type: text/html; charset=UTF-8' );

		// Convert plain text to HTML with line breaks
		$html_body = nl2br( esc_html( $body ) );

		// Send email
		$sent = wp_mail( $admin_email, $subject, $html_body, $headers );

		// Log if email fails
		if ( ! $sent ) {
			error_log(
				sprintf(
					'DDHH Job Manager: Failed to send admin deactivation notification for job #%d "%s". Email may be disabled in Local WP environment.',
					$post->ID,
					$job_title
				)
			);
		}
	}
}