<?php

namespace App\Http\Controllers;

use App\Models\WeatherReport;
use Illuminate\Support\Facades\File;
use Inertia\Inertia;
use Inertia\Response;

class WeatherController extends Controller
{
    public function index(): Response
    {
        $latestHourly = WeatherReport::query()
            ->where('type', 'hourly')
            ->with('periods')
            ->orderByDesc('reported_at')
            ->first();

        $latestWeekly = WeatherReport::query()
            ->where('type', 'weekly')
            ->with('periods')
            ->orderByDesc('reported_at')
            ->first();

        $currentPeriod = $latestHourly?->periods->first();

        $hourlyForecast = $latestHourly?->periods
            ->take(6)
            ->map(fn ($period) => [
                'time' => $period->start_time->format('H:i'),
                'hour' => $period->start_time->format('H'),
                'temperature' => $period->temperature,
                'temperatureUnit' => $period->temperature_unit,
                'icon' => $this->mapIconToEmoji($period->short_forecast),
                'shortForecast' => $period->short_forecast,
                'precipitationProbability' => $period->precipitation_probability,
            ]);

        $weeklyForecast = $latestWeekly?->periods
            ->filter(fn ($period) => $period->is_daytime)
            ->take(7)
            ->values()
            ->map(fn ($period) => [
                'name' => $period->name,
                'temperature' => $period->temperature,
                'temperatureUnit' => $period->temperature_unit,
                'icon' => $this->mapIconToEmoji($period->short_forecast),
                'shortForecast' => $period->short_forecast,
                'precipitationProbability' => $period->precipitation_probability,
                'windSpeed' => $period->wind_speed,
                'windDirection' => $period->wind_direction,
                'detailedForecast' => $period->detailed_forecast,
            ]);

        $background = $this->getBackgroundForForecast(
            $currentPeriod?->short_forecast,
            $currentPeriod?->is_daytime ?? true
        );

        return Inertia::render('Weather', [
            'current' => $currentPeriod ? [
                'temperature' => $currentPeriod->temperature,
                'temperatureUnit' => $currentPeriod->temperature_unit,
                'shortForecast' => $currentPeriod->short_forecast,
                'detailedForecast' => $currentPeriod->detailed_forecast,
                'windSpeed' => $currentPeriod->wind_speed,
                'windDirection' => $currentPeriod->wind_direction,
                'humidity' => $currentPeriod->relative_humidity,
                'dewpoint' => $currentPeriod->dewpoint_celsius,
                'precipitationProbability' => $currentPeriod->precipitation_probability,
                'isDaytime' => $currentPeriod->is_daytime,
                'icon' => $this->mapIconToEmoji($currentPeriod->short_forecast),
            ] : null,
            'hourlyForecast' => $hourlyForecast ?? collect(),
            'weeklyForecast' => $weeklyForecast ?? collect(),
            'location' => [
                'latitude' => $latestHourly?->latitude,
                'longitude' => $latestHourly?->longitude,
                'name' => 'Utah County',
            ],
            'reportedAt' => $latestHourly?->reported_at?->format('M d, Y H:i'),
            'background' => $background,
        ]);
    }

    /**
     * @return array{imageUrl: string|null, licenseHtml: string|null}
     */
    private function getBackgroundForForecast(?string $forecast, bool $isDaytime): array
    {
        $folder = $this->mapForecastToFolder($forecast);
        $timeOfDay = $isDaytime ? 'day' : 'night';
        $basePath = storage_path('app/public/backgrounds/'.$folder);

        if (! File::isDirectory($basePath)) {
            return ['imageUrl' => null, 'licenseHtml' => null];
        }

        $files = File::files($basePath);
        $pattern = '/^'.$timeOfDay.'_[a-zA-Z0-9_-]+\.jpg$/';

        $imageFiles = collect($files)
            ->filter(fn ($file) => preg_match($pattern, $file->getFilename()))
            ->values();

        if ($imageFiles->isEmpty()) {
            $fallbackPattern = '/^(day|night)_[a-zA-Z0-9_-]+\.jpg$/';
            $imageFiles = collect($files)
                ->filter(fn ($file) => preg_match($fallbackPattern, $file->getFilename()))
                ->values();
        }

        if ($imageFiles->isEmpty()) {
            return ['imageUrl' => null, 'licenseHtml' => null];
        }

        $selectedImage = $imageFiles->random();
        $imageFilename = $selectedImage->getFilename();
        $imageUrl = '/storage/backgrounds/'.$folder.'/'.$imageFilename;

        $licenseFilename = preg_replace('/\.jpg$/', '_license.html', $imageFilename);
        $licensePath = $basePath.'/'.$licenseFilename;
        $licenseHtml = null;

        if (File::exists($licensePath)) {
            $licenseHtml = trim(File::get($licensePath));
        }

        return [
            'imageUrl' => $imageUrl,
            'licenseHtml' => $licenseHtml,
        ];
    }

    private function mapForecastToFolder(?string $forecast): string
    {
        if (! $forecast) {
            return 'cloudy';
        }

        $forecast = strtolower($forecast);

        return match (true) {
            str_contains($forecast, 'thunder') || str_contains($forecast, 'storm') => 'stormy',
            str_contains($forecast, 'snow') => 'snowy',
            str_contains($forecast, 'rain') || str_contains($forecast, 'shower') || str_contains($forecast, 'drizzle') => 'rainy',
            str_contains($forecast, 'wind') => 'windy',
            str_contains($forecast, 'sunny') || str_contains($forecast, 'clear') => 'clear',
            str_contains($forecast, 'cloud') || str_contains($forecast, 'overcast') => 'cloudy',
            str_contains($forecast, 'fog') || str_contains($forecast, 'mist') => 'cloudy',
            default => 'cloudy',
        };
    }

    private function mapIconToEmoji(?string $forecast): string
    {
        if (! $forecast) {
            return 'cloud';
        }

        $forecast = strtolower($forecast);

        return match (true) {
            str_contains($forecast, 'sunny') || str_contains($forecast, 'clear') => 'sun',
            str_contains($forecast, 'partly') && str_contains($forecast, 'cloud') => 'cloud-sun',
            str_contains($forecast, 'mostly cloudy') => 'cloud',
            str_contains($forecast, 'cloud') => 'cloud',
            str_contains($forecast, 'rain') && str_contains($forecast, 'snow') => 'cloud-snow',
            str_contains($forecast, 'snow') => 'cloud-snow',
            str_contains($forecast, 'rain') || str_contains($forecast, 'shower') => 'cloud-rain',
            str_contains($forecast, 'thunder') || str_contains($forecast, 'storm') => 'cloud-lightning',
            str_contains($forecast, 'fog') || str_contains($forecast, 'mist') => 'cloud-fog',
            str_contains($forecast, 'wind') => 'wind',
            default => 'cloud',
        };
    }
}