<?php

declare(strict_types=1);

namespace App\Application\LiveComponents\Chart;

use App\Application\LiveComponents\LiveComponentState;

/**
 * Type-safe state for ChartComponent
 *
 * Provides compile-time type safety for real-time chart visualization.
 * All properties are readonly and immutable - transformations return new instances.
 */
final readonly class ChartState implements LiveComponentState
{
    public function __construct(
        public string $chartType = 'line',
        public array $chartData = [],
        public string $dataRange = '24h',
        public int $lastUpdate = 0,
        public bool $autoRefresh = true,
        public int $refreshInterval = 5000,
        public float $executionTimeMs = 0,
        public int $dataPointsCount = 0,
        public string $dataSource = 'demo'
    ) {
    }

    /**
     * Create from ComponentData (Framework → Domain conversion)
     */
    public static function fromArray(array $data): self
    {
        return new self(
            chartType: (string) ($data['chart_type'] ?? 'line'),
            chartData: ($data['chart_data'] ?? []),
            dataRange: (string) ($data['data_range'] ?? '24h'),
            lastUpdate: (int) ($data['last_update'] ?? 0),
            autoRefresh: (bool) ($data['auto_refresh'] ?? true),
            refreshInterval: (int) ($data['refresh_interval'] ?? 5000),
            executionTimeMs: (float) ($data['execution_time_ms'] ?? 0),
            dataPointsCount: (int) ($data['data_points_count'] ?? 0),
            dataSource: (string) ($data['data_source'] ?? 'demo')
        );
    }

    /**
     * Create empty state with defaults
     */
    public static function empty(): self
    {
        return new self();
    }

    /**
     * Convert to ComponentData (Domain → Framework conversion)
     */
    public function toArray(): array
    {
        return [
            'chart_type' => $this->chartType,
            'chart_data' => $this->chartData,
            'data_range' => $this->dataRange,
            'last_update' => $this->lastUpdate,
            'auto_refresh' => $this->autoRefresh,
            'refresh_interval' => $this->refreshInterval,
            'execution_time_ms' => $this->executionTimeMs,
            'data_points_count' => $this->dataPointsCount,
            'data_source' => $this->dataSource,
        ];
    }

    /**
     * Update chart with refreshed data
     */
    public function withRefreshedData(array $chartData, float $executionTimeMs): self
    {
        return new self(
            chartType: $this->chartType,
            chartData: $chartData,
            dataRange: $this->dataRange,
            lastUpdate: time(),
            autoRefresh: $this->autoRefresh,
            refreshInterval: $this->refreshInterval,
            executionTimeMs: $executionTimeMs,
            dataPointsCount: $this->calculateDataPointsCount($chartData),
            dataSource: $this->dataSource
        );
    }

    /**
     * Change chart type
     */
    public function withChartType(string $chartType, array $chartData): self
    {
        return new self(
            chartType: $chartType,
            chartData: $chartData,
            dataRange: $this->dataRange,
            lastUpdate: time(),
            autoRefresh: $this->autoRefresh,
            refreshInterval: $this->refreshInterval,
            executionTimeMs: 0,
            dataPointsCount: $this->calculateDataPointsCount($chartData),
            dataSource: $this->dataSource
        );
    }

    /**
     * Change data range
     */
    public function withDataRange(string $dataRange, array $chartData): self
    {
        return new self(
            chartType: $this->chartType,
            chartData: $chartData,
            dataRange: $dataRange,
            lastUpdate: time(),
            autoRefresh: $this->autoRefresh,
            refreshInterval: $this->refreshInterval,
            executionTimeMs: 0,
            dataPointsCount: $this->calculateDataPointsCount($chartData),
            dataSource: $this->dataSource
        );
    }

    /**
     * Toggle auto-refresh
     */
    public function withToggledAutoRefresh(): self
    {
        return new self(
            chartType: $this->chartType,
            chartData: $this->chartData,
            dataRange: $this->dataRange,
            lastUpdate: $this->lastUpdate,
            autoRefresh: ! $this->autoRefresh,
            refreshInterval: $this->refreshInterval,
            executionTimeMs: $this->executionTimeMs,
            dataPointsCount: $this->dataPointsCount,
            dataSource: $this->dataSource
        );
    }

    /**
     * Calculate data points count from chart data
     */
    private function calculateDataPointsCount(array $chartData): int
    {
        if (empty($chartData)) {
            return 0;
        }

        return count($chartData['labels'] ?? []);
    }

    /**
     * Check if has chart data
     */
    public function hasChartData(): bool
    {
        return ! empty($this->chartData);
    }

    /**
     * Get chart data as JSON
     */
    public function getChartDataJson(): string
    {
        return ! empty($this->chartData) ? json_encode($this->chartData) : '{}';
    }

    /**
     * Format last update timestamp
     */
    public function getFormattedLastUpdate(): string
    {
        if ($this->lastUpdate === 0) {
            return 'Noch nicht aktualisiert';
        }

        $diff = time() - $this->lastUpdate;

        if ($diff < 60) {
            return 'Gerade eben';
        }

        if ($diff < 3600) {
            $minutes = floor($diff / 60);

            return "Vor {$minutes} Minute" . ($minutes > 1 ? 'n' : '');
        }

        if ($diff < 86400) {
            $hours = floor($diff / 3600);

            return "Vor {$hours} Stunde" . ($hours > 1 ? 'n' : '');
        }

        return date('d.m.Y H:i', $this->lastUpdate);
    }

    /**
     * Get auto-refresh status text
     */
    public function getAutoRefreshText(): string
    {
        return $this->autoRefresh ? 'Auto-Refresh aktiv' : 'Auto-Refresh pausiert';
    }

    /**
     * Get auto-refresh button text
     */
    public function getAutoRefreshButtonText(): string
    {
        return $this->autoRefresh ? 'Pausieren' : 'Starten';
    }

    /**
     * Get auto-refresh button CSS class
     */
    public function getAutoRefreshButtonClass(): string
    {
        return $this->autoRefresh ? 'btn-warning' : 'btn-success';
    }

    /**
     * Get data points text
     */
    public function getDataPointsText(): string
    {
        if ($this->dataPointsCount === 0) {
            return 'Keine Datenpunkte';
        }

        return $this->dataPointsCount === 1 ? '1 Datenpunkt' : "{$this->dataPointsCount} Datenpunkte";
    }

    /**
     * Check if should show refresh button
     */
    public function shouldShowRefreshButton(): bool
    {
        return ! $this->autoRefresh;
    }

    /**
     * Check if should show performance metrics
     */
    public function shouldShowPerformanceMetrics(): bool
    {
        return $this->executionTimeMs > 0;
    }

    /**
     * Get chart container CSS class
     */
    public function getChartContainerClass(): string
    {
        return 'chart-container chart-type-' . $this->chartType;
    }

}