<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

function statpress_yearly_summary_page() {
	global $wpdb;
	$table_activities = $wpdb->prefix . 'statpress_activities';

	$current_year = isset( $_GET['year'] ) ? intval( $_GET['year'] ) : current_time( 'Y' );

	// Pobierz dostępne lata z bazy danych
	$available_years = $wpdb->get_col( "SELECT DISTINCT YEAR(date) FROM $table_activities ORDER BY YEAR(date) DESC" );
	if ( empty( $available_years ) ) {
		$available_years = array( current_time( 'Y' ) ); // Domyślny rok, jeśli brak danych
	}

	// --- GOALS SECTION ---
	$table_goals    = $wpdb->prefix . 'statpress_goals';
	$goals_for_year = $wpdb->get_results(
		$wpdb->prepare(
			"SELECT * FROM {$table_goals} WHERE year = %d ORDER BY name ASC",
			$current_year
		)
	);

	// Zapytanie SQL do grupowania danych miesięcznie
	$sql = $wpdb->prepare(
		"
		SELECT
			MONTH(date) as month_num,
			SUM(distance) as total_distance,
			SUM(calories) as total_calories, 
			SUM(TIME_TO_SEC(duration)) as total_seconds,
			COUNT(id) as activity_count
		FROM $table_activities
		WHERE YEAR(date) = %d
		GROUP BY month_num
		ORDER BY month_num ASC
	",
		$current_year
	);

	$monthly_summary = $wpdb->get_results( $sql, OBJECT_K ); // OBJECT_K zwróci tablicę z kluczami będącymi numerami miesięcy

	// Przygotowanie danych dla wszystkich 12 miesięcy
	$full_year_summary   = array();
	$total_year_distance = 0;
	$total_year_calories = 0;
	$total_year_seconds  = 0;

	// Określ, ile miesięcy pokazać, aby uniknąć zer dla przyszłych miesięcy
	$this_year          = (int) current_time( 'Y' );
	$this_month         = (int) current_time( 'n' );
	$loop_until_month   = 12; // Domyślnie dla lat ubiegłych

	if ( $current_year === $this_year ) {
		// Dla bieżącego roku, pokaż miesiące do bieżącego miesiąca
		$loop_until_month = $this_month;
	} elseif ( $current_year > $this_year ) {
		// Dla przyszłych lat, pokaż miesiące tylko do ostatniego, w którym są dane
		$last_month_with_data = $wpdb->get_var( $wpdb->prepare( "SELECT MAX(MONTH(date)) FROM $table_activities WHERE YEAR(date) = %d", $current_year ) );
		$loop_until_month     = $last_month_with_data ? (int) $last_month_with_data : 0;
	}

	for ( $i = 1; $i <= $loop_until_month; $i++ ) {
		$month_name = date_i18n( 'F', mktime( 0, 0, 0, $i, 10 ) ); // Nazwa miesiąca
		$data       = isset( $monthly_summary[ $i ] ) ? $monthly_summary[ $i ] : null;

		$full_year_summary[ $i ] = (object) array(
			'month_name'     => $month_name,
			'total_distance' => $data ? $data->total_distance : 0,
			'total_calories' => $data ? (int) $data->total_calories : 0,
			'total_seconds'  => $data ? (int) $data->total_seconds : 0,
			'activity_count' => $data ? (int) $data->activity_count : 0,
		);

		$total_year_distance += $full_year_summary[ $i ]->total_distance;
		$total_year_seconds  += $full_year_summary[ $i ]->total_seconds;
		$total_year_calories += $full_year_summary[ $i ]->total_calories;
	}

	$total_year_hours                = floor( $total_year_seconds / 3600 );
	$total_year_minutes              = floor( ( $total_year_seconds % 3600 ) / 60 );
	$total_year_duration_formatted = sprintf( '%d godz. %d min.', $total_year_hours, $total_year_minutes );

	// Przygotowanie danych dla wykresu
	$chart_labels_js = array();
	$chart_datasets  = array(
		'distance'   => array(),
		'duration'   => array(),
		'calories'   => array(),
		'activities' => array(),
	);

	foreach ( $full_year_summary as $month_data ) {
		$chart_labels_js[]              = $month_data->month_name;
		$chart_datasets['distance'][]   = round( (float) $month_data->total_distance, 2 );
		$chart_datasets['duration'][]   = round( $month_data->total_seconds / 3600, 2 ); // w godzinach
		$chart_datasets['calories'][]   = $month_data->total_calories;
		$chart_datasets['activities'][] = $month_data->activity_count;
	}

	// Włączenie skryptów dla Chart.js
	wp_enqueue_script( 'chart-js', 'https://cdn.jsdelivr.net/npm/chart.js', array(), null, true );
	wp_register_script( 'statpress-chart-loader', false );
	wp_enqueue_script( 'statpress-chart-loader' );

	$chart_configs = array(
		'distance'   => array(
			'label'           => 'Dystans (km)',
			'data'            => $chart_datasets['distance'],
			'backgroundColor' => 'rgba(26, 115, 232, 0.5)', /* Google Blue */
			'borderColor'     => 'rgba(26, 115, 232, 1)',
			'yAxisLabel'      => 'Kilometry',
		),
		'duration'   => array(
			'label'           => 'Czas trwania (godz.)',
			'data'            => $chart_datasets['duration'],
			'backgroundColor' => 'rgba(24, 128, 56, 0.5)', /* Google Green */
			'borderColor'     => 'rgba(24, 128, 56, 1)',
			'yAxisLabel'      => 'Godziny',
		),
		'calories'   => array(
			'label'           => 'Kalorie (kcal)',
			'data'            => $chart_datasets['calories'],
			'backgroundColor' => 'rgba(217, 48, 37, 0.5)', /* Google Red */
			'borderColor'     => 'rgba(217, 48, 37, 1)',
			'yAxisLabel'      => 'kcal',
		),
		'activities' => array(
			'label'           => 'Liczba aktywności',
			'data'            => $chart_datasets['activities'],
			'backgroundColor' => 'rgba(249, 171, 0, 0.5)', /* Google Yellow */
			'borderColor'     => 'rgba(249, 171, 0, 1)',
			'yAxisLabel'      => 'Ilość',
		),
	);

	wp_add_inline_script(
		'statpress-chart-loader',
		'
        document.addEventListener("DOMContentLoaded", function() {
            const chartLabels = ' . json_encode( $chart_labels_js ) . ';
            const chartConfigs = ' . json_encode( $chart_configs ) . ';
            let activeChart = null;

            const tabs = document.querySelectorAll(".nav-tab");
            tabs.forEach(tab => {
                tab.addEventListener("click", function(e) {
                    e.preventDefault();
                    tabs.forEach(t => t.classList.remove("nav-tab-active"));
                    this.classList.add("nav-tab-active");
                    
                    const chartType = this.getAttribute("href").substring(1);
                    renderChart(chartType);
                });
            });

            function renderChart(type) {
                if (activeChart) {
                    activeChart.destroy();
                }
                const config = chartConfigs[type];
                const ctx = document.getElementById("statpressYearlyChart").getContext("2d");
                activeChart = new Chart(ctx, {
                    type: "bar",
                    data: {
                        labels: chartLabels,
                        datasets: [{
                            label: config.label,
                            data: config.data,
                            backgroundColor: config.backgroundColor,
                            borderColor: config.borderColor,
                            borderWidth: 1
                        }]
                    },
                    options: {
                        responsive: true, maintainAspectRatio: false,
                        scales: { y: { beginAtZero: true, title: { display: true, text: config.yAxisLabel } } }
                    }
                });
            }

            // Render initial chart
            if (tabs.length > 0) {
                renderChart(tabs[0].getAttribute("href").substring(1));
            }
        });
    '
	);

	?>
	<div class="wrap">
		<h1>Podsumowanie Roczne</h1>

		<div class="tablenav top">
			<div class="alignleft actions">
				<label for="filter-by-year" class="screen-reader-text">Filtruj według roku</label>
				<form method="get" style="display: flex; gap: 5px; align-items: center;">
					<input type="hidden" name="page" value="statpress-yearly-summary">
					<select name="year" id="filter-by-year">
						<?php foreach ( $available_years as $year_option ) : ?>
							<option value="<?php echo esc_attr( $year_option ); ?>" <?php selected( $current_year, $year_option ); ?>><?php echo esc_html( $year_option ); ?></option>
						<?php endforeach; ?>
					</select>
					<?php submit_button( 'Filtruj', 'secondary', 'filter_action', false ); ?>
				</form>
			</div>
		</div>

		<?php if ( ! empty( $goals_for_year ) ) : ?>
		<div class="postbox" style="margin-bottom: 20px;">
			<div class="postbox-header"><h2 class="hndle">Cele na <?php echo esc_html( $current_year ); ?></h2></div>
			<div class="inside">
				<ul class="statpress-goals-list">
				<?php
				foreach ( $goals_for_year as $goal ) :
					$progress   = statpress_get_goal_progress( $goal );
					$percentage = min( 100, $progress['percentage'] );

					$target_formatted  = '';
					$current_formatted = '';
					if ( 'duration_sec' === $goal->goal_type ) {
						$target_formatted  = round( $goal->target_value / 3600 ) . ' godz.';
						$current_formatted = sprintf( '%d godz. %d min.', floor( $progress['current_value'] / 3600 ), floor( ( $progress['current_value'] % 3600 ) / 60 ) );
					} elseif ( 'distance' === $goal->goal_type ) {
						$target_formatted  = number_format( $goal->target_value, 0, ',', ' ' ) . ' km';
						$current_formatted = number_format( $progress['current_value'], 2, ',', ' ' ) . ' km';
					} else { // count
						$target_formatted  = (int) $goal->target_value;
						$current_formatted = (int) $progress['current_value'];
					}
					?>
					<li class="statpress-goal-item">
						<div class="statpress-goal-info">
							<strong><?php echo esc_html( $goal->name ); ?></strong>
							<small><?php echo $current_formatted; ?> / <?php echo $target_formatted; ?> (<?php echo round( $percentage, 1 ); ?>%)</small>
						</div>
						<div class="statpress-progress-bar-container">
							<div class="statpress-progress-bar" style="width: <?php echo esc_attr( $percentage ); ?>%;"></div>
						</div>
					</li>
				<?php endforeach; ?>
				</ul>
			</div>
		</div>
		<?php endif; ?>

		<div class="postbox" style="margin-bottom: 20px;">
			<div class="postbox-header"><h2 class="hndle">Wykresy dla <?php echo esc_html( $current_year ); ?></h2></div>
			<div class="inside">
				<nav class="nav-tab-wrapper" style="margin-bottom: 20px;">
					<a href="#distance" class="nav-tab nav-tab-active">Dystans</a>
					<a href="#duration" class="nav-tab">Czas</a>
					<a href="#calories" class="nav-tab">Kalorie</a>
					<a href="#activities" class="nav-tab">Aktywności</a>
				</nav>
				<div style="position: relative; height:40vh; width:100%;">
					<canvas id="statpressYearlyChart"></canvas>
				</div>
			</div>
		</div>

		<table class="wp-list-table widefat fixed striped">
			<thead>
				<tr><th>Miesiąc</th><th>Dystans (km)</th><th>Kalorie (kcal)</th><th>Czas</th></tr>
			</thead>
			<tbody>
				<?php foreach ( $full_year_summary as $month_data ) : ?>
					<tr>
						<td><?php echo esc_html( $month_data->month_name ); ?></td>
						<td><?php echo number_format( $month_data->total_distance, 2, ',', ' ' ); ?></td>
						<td><?php echo number_format( $month_data->total_calories, 0, ',', ' ' ); ?></td>
						<td><?php echo esc_html( gmdate( 'H:i:s', $month_data->total_seconds ) ); ?></td>
					</tr>
				<?php endforeach; ?>
				<tr class="alternate">
					<th>SUMA ROCZNA</th>
					<th><?php echo number_format( $total_year_distance, 2, ',', ' ' ); ?></th>
					<th><?php echo number_format( $total_year_calories, 0, ',', ' ' ); ?></th>
					<th><?php echo esc_html( $total_year_duration_formatted ); ?></th>
				</tr>
			</tbody>
		</table>
	</div>
	<?php
}