<?php
/**
 * Hilfsfunktionen.
 *
 * @package dgt-verkehrsmonitor
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

function dgt_vm_bundeslaender() {
	return array(
		'baden-wuerttemberg'     => 'Baden-Württemberg',
		'bayern'                 => 'Bayern',
		'berlin'                 => 'Berlin',
		'brandenburg'            => 'Brandenburg',
		'bremen'                 => 'Bremen',
		'hamburg'                => 'Hamburg',
		'hessen'                 => 'Hessen',
		'mecklenburg-vorpommern' => 'Mecklenburg-Vorpommern',
		'niedersachsen'          => 'Niedersachsen',
		'nordrhein-westfalen'    => 'Nordrhein-Westfalen',
		'rheinland-pfalz'        => 'Rheinland-Pfalz',
		'saarland'               => 'Saarland',
		'sachsen'                => 'Sachsen',
		'sachsen-anhalt'         => 'Sachsen-Anhalt',
		'schleswig-holstein'     => 'Schleswig-Holstein',
		'thueringen'             => 'Thüringen',
	);
}

function dgt_vm_bundesland_name( $slug ) {
	$all = dgt_vm_bundeslaender();
	return isset( $all[ $slug ] ) ? $all[ $slug ] : '';
}

function dgt_vm_bundesland_kuerzel() {
	return array(
		'baden-wuerttemberg'     => 'BW',
		'bayern'                 => 'BY',
		'berlin'                 => 'BE',
		'brandenburg'            => 'BB',
		'bremen'                 => 'HB',
		'hamburg'                => 'HH',
		'hessen'                 => 'HE',
		'mecklenburg-vorpommern' => 'MV',
		'niedersachsen'          => 'NI',
		'nordrhein-westfalen'    => 'NW',
		'rheinland-pfalz'        => 'RP',
		'saarland'               => 'SL',
		'sachsen'                => 'SN',
		'sachsen-anhalt'         => 'ST',
		'schleswig-holstein'     => 'SH',
		'thueringen'             => 'TH',
	);
}

function dgt_vm_is_vm_page() {
	return (bool) get_query_var( 'dgt_vm' );
}

/* ─── URLs ─────────────────────────────────────────────── */

function dgt_vm_url() {
	return home_url( '/verkehrsmonitor/' );
}

function dgt_vm_report_url( $date = '' ) {
	if ( ! $date || 'heute' === $date ) {
		return home_url( '/verkehrsmonitor/heute/' );
	}
	return home_url( '/verkehrsmonitor/report/' . $date . '/' );
}

function dgt_vm_bundesland_url( $slug ) {
	return home_url( '/verkehrsmonitor/' . $slug . '/' );
}

function dgt_vm_stadt_url( $bl_slug, $stadt ) {
	return home_url( '/verkehrsmonitor/' . $bl_slug . '/' . sanitize_title( $stadt ) . '/' );
}

function dgt_vm_incident_url( $incident_or_bl, $ai_slug = '' ) {
	if ( is_object( $incident_or_bl ) ) {
		$inc = $incident_or_bl;
		return home_url( '/verkehrsmonitor/' . $inc->bundesland . '/' . $inc->source_date . '/' . $inc->ai_slug . '/' );
	}
	return home_url( '/verkehrsmonitor/' . $incident_or_bl . '/' . $ai_slug . '/' );
}

function dgt_vm_kategorie_url( $kat ) {
	return home_url( '/verkehrsmonitor/' . $kat . '/' );
}

function dgt_vm_statistiken_url() {
	return home_url( '/verkehrsmonitor/statistiken/' );
}

function dgt_vm_archiv_url( $year = '', $month = '' ) {
	$url = home_url( '/verkehrsmonitor/archiv/' );
	if ( $year ) {
		$url .= $year . '/';
		if ( $month ) {
			$url .= $month . '/';
		}
	}
	return $url;
}

/* ─── Delikt-Helfer ────────────────────────────────────── */

function dgt_vm_delikt_label( $delikt ) {
	$labels = array(
		'alkohol'    => 'Alkohol',
		'drogen'     => 'Drogen',
		'beides'     => 'Alkohol & Drogen',
		'sonstiges'  => 'Sonstiges',
	);
	return isset( $labels[ $delikt ] ) ? $labels[ $delikt ] : $delikt;
}

function dgt_vm_delikt_class( $delikt ) {
	$map = array(
		'alkohol'   => 'vm-delikt--alkohol',
		'drogen'    => 'vm-delikt--drogen',
		'beides'    => 'vm-delikt--beides',
		'sonstiges' => 'vm-delikt--sonstig',
	);
	return isset( $map[ $delikt ] ) ? $map[ $delikt ] : '';
}

function dgt_vm_substanz_label( $key ) {
	$labels = array(
		'cannabis'    => 'Cannabis',
		'kokain'      => 'Kokain',
		'amphetamin'  => 'Amphetamin',
		'heroin'      => 'Heroin',
		'mdma'        => 'MDMA',
		'mischkonsum' => 'Mischkonsum',
		'medikamente' => 'Medikamente',
		'sonstige'    => 'Sonstige',
	);
	return isset( $labels[ $key ] ) ? $labels[ $key ] : ucfirst( $key );
}

function dgt_vm_substanz_seiten() {
	return array( 'cannabis', 'kokain', 'amphetamin', 'mischkonsum', 'medikamente' );
}

function dgt_vm_kategorie_seiten() {
	return array( 'alkohol-am-steuer', 'drogen-am-steuer', 'unfaelle' );
}

function dgt_vm_format_date( $date ) {
	if ( ! $date ) {
		return '';
	}
	return date_i18n( 'j. F Y', strtotime( $date ) );
}

function dgt_vm_format_datetime( $datetime ) {
	if ( ! $datetime ) {
		return '';
	}
	return date_i18n( 'j. F Y, H:i', strtotime( $datetime ) );
}

function dgt_vm_trend_arrow( $current, $previous ) {
	if ( ! $previous ) {
		return '';
	}
	$pct = round( ( $current - $previous ) / $previous * 100 );
	if ( $pct > 0 ) {
		return '<span class="vm-trend vm-trend--up">+' . $pct . ' %</span>';
	}
	if ( $pct < 0 ) {
		return '<span class="vm-trend vm-trend--down">' . $pct . ' %</span>';
	}
	return '<span class="vm-trend vm-trend--flat">±0 %</span>';
}