<?php

declare(strict_types=1);

namespace Weerscherm;

/**
 * Vaste voorbeelddata, relatief aan het huidige moment, zodat de frontend zonder Netatmo-koppeling
 * gebouwd en bekeken kan worden en altijd "vandaag" laat zien.
 */
final class FixtureSource implements WeatherSource
{
    private const RAIN_PER_DAY = [4.3, 0, 3.2, 5.1, 0, 0, 15.5, 1.2, 6.8, 0.0, 2.4, 0.6, 3.9, 0, 1.1];

    private readonly \DateTimeImmutable $now;

    public function __construct(?\DateTimeImmutable $now = null, private readonly string $timezone = 'Europe/Berlin')
    {
        $this->now = ($now ?? new \DateTimeImmutable('now'))->setTimezone(new \DateTimeZone($this->timezone));
    }

    public function stationsData(): array
    {
        $at = fn(string $time) => (int) $this->now->modify($time)->format('U');
        $today = fn(string $hm) => (int) $this->now->setTime((int) substr($hm, 0, 2), (int) substr($hm, 3, 2))->format('U');

        return ['devices' => [[
            '_id' => '70:ee:50:00:00:01', 'type' => 'NAMain', 'station_name' => 'Thuis', 'module_name' => 'Woonkamer', 'reachable' => true,
            'place' => ['timezone' => $this->timezone, 'location' => [6.55, 51.82]],
            'dashboard_data' => ['time_utc' => $at('-2 minutes'), 'Temperature' => 21.3, 'CO2' => 612, 'Humidity' => 48,
                'Pressure' => 1014.2, 'AbsolutePressure' => 1011.8, 'pressure_trend' => 'up', 'Noise' => 38,
                'min_temp' => 20.4, 'max_temp' => 22.1, 'date_min_temp' => $today('05:50'), 'date_max_temp' => $today('13:40'), 'temp_trend' => 'stable'],
            'modules' => [
                ['_id' => '02:00:00:00:00:01', 'type' => 'NAModule1', 'module_name' => 'Buiten', 'reachable' => true,
                    'dashboard_data' => ['time_utc' => $at('-3 minutes'), 'Temperature' => 16.4, 'Humidity' => 71, 'min_temp' => 9.2, 'max_temp' => 19.8,
                        'date_min_temp' => $today('06:10'), 'date_max_temp' => $today('13:05'), 'temp_trend' => 'down']],
                ['_id' => '03:00:00:00:00:02', 'type' => 'NAModule4', 'module_name' => 'Slaapkamer', 'reachable' => true,
                    'dashboard_data' => ['time_utc' => $at('-4 minutes'), 'Temperature' => 18.9, 'CO2' => 1180, 'Humidity' => 52, 'min_temp' => 18.1, 'max_temp' => 19.6, 'temp_trend' => 'up']],
                ['_id' => '03:00:00:00:00:03', 'type' => 'NAModule4', 'module_name' => 'Kantoor', 'reachable' => true,
                    'dashboard_data' => ['time_utc' => $at('-4 minutes'), 'Temperature' => 20.2, 'CO2' => 1640, 'Humidity' => 44, 'min_temp' => 19.0, 'max_temp' => 21.0, 'temp_trend' => 'stable']],
                ['_id' => '05:00:00:00:00:04', 'type' => 'NAModule3', 'module_name' => 'Regenmeter', 'reachable' => true,
                    'dashboard_data' => ['time_utc' => $at('-3 minutes'), 'Rain' => 0, 'sum_rain_1' => 0, 'sum_rain_24' => 2.4]],
            ],
        ]]];
    }

    public function measure(string $deviceId, string $moduleId, int $begin, int $end): array
    {
        $body = [];
        $count = count(self::RAIN_PER_DAY);
        foreach (self::RAIN_PER_DAY as $i => $mm) {
            $day = $this->now->setTime(3, 17)->modify('-' . ($count - 1 - $i) . ' days');
            if ($day->getTimestamp() >= $begin) {
                $body[(string) $day->getTimestamp()] = [$mm];
            }
        }
        return $body;
    }

    public function pressureHistory(string $deviceId, int $begin, int $end): array
    {
        $body = [];
        for ($ts = $begin - ($begin % 1800); $ts <= $end; $ts += 1800) {
            $i = ($end - $ts) / 1800;
            $body[(string) $ts] = [round(1012 + 3 * sin($i / 8) + ($i % 5) * 0.1, 1)];
        }
        return $body;
    }

    public function forecast(float $lat, float $lon, string $timezone): array
    {
        $tmin = [11.0, 10.1, 11.3, 12.0, 9.4, 8.1];
        $tmax = [17.9, 18.3, 20.1, 17.4, 15.2, 16.0];
        $precipDay = [0.0, 0.4, 0.0, 8.2, 3.1, 0.2];

        $dates = [];
        $hourlyTime = [];
        $hourlyTemp = [];
        $hourlyPrecip = [];
        $hourlyWind = [];
        $hourlyDir = [];
        for ($d = 0; $d < 6; $d++) {
            $day = $this->now->modify("+$d days");
            $dates[] = $day->format('Y-m-d');
            for ($h = 0; $h < 24; $h++) {
                $hourlyTime[] = $day->setTime($h, 0)->format('Y-m-d\TH:i');
                $t = $tmin[$d] + ($tmax[$d] - $tmin[$d]) * (0.5 + 0.5 * sin((($h - 9) / 24) * 2 * M_PI));
                $hourlyTemp[] = round($t, 1);
                $p = ($precipDay[$d] > 0 && $h >= 14 && $h <= 16) ? round($precipDay[$d] / 3, 1) : 0.0;
                $hourlyPrecip[] = $p;
                $hourlyWind[] = round(3 + 6 * (0.5 + 0.5 * sin((($h + $d * 3) / 24) * 2 * M_PI)), 1);
                $hourlyDir[] = ($d * 40 + $h * 7) % 360;
            }
        }

        return [
            'daily' => [
                'time' => $dates,
                'weather_code' => [3, 2, 0, 61, 80, 95],
                'temperature_2m_max' => $tmax,
                'temperature_2m_min' => $tmin,
                'precipitation_sum' => $precipDay,
                'precipitation_probability_max' => [10, 20, 5, 80, 60, 15],
            ],
            'hourly' => [
                'time' => $hourlyTime,
                'temperature_2m' => $hourlyTemp,
                'precipitation' => $hourlyPrecip,
                'wind_speed_10m' => $hourlyWind,
                'wind_direction_10m' => $hourlyDir,
            ],
        ];
    }
}