<?php

namespace App\Support;

use App\Models\City;

/**
 * Airport grounds north and south of the city grid.
 *
 * Geometry derives from the layout edges so both airports always sit on
 * open land beyond the roads. The same descriptor drives the client-side
 * build (runways, taxiways, aprons, terminals, hangars, stands, helipads)
 * and the walkable-visit zone used by the position clamp.
 */
class Airports
{
    /** Half width (X) of the walkable airport strips. */
    public const VISIT_HALF_WIDTH = 110.0;

    /** Walkable Z range inside the airport strips (both airports). */
    public const VISIT_MIN_Z = -400.0;

    public const VISIT_MAX_Z = 400.0;

    /**
     * Layout edge north of the city (same derivation the road grid uses).
     */
    public static function layoutMaxZ(City $city): float
    {
        return (float) (ceil(((float) $city->bounds_max_z) / 40) * 40 + 40);
    }

    /**
     * Layout edge south of the city.
     */
    public static function layoutMinZ(City $city): float
    {
        return (float) (floor(((float) $city->bounds_min_z) / 40) * 40 - 40);
    }

    /**
     * Full airports descriptor for the world payload.
     *
     * @return array{visit: array<string, float>, sites: list<array<string, mixed>>}
     */
    public static function geometry(City $city): array
    {
        return [
            'visit' => [
                'half_width' => self::VISIT_HALF_WIDTH,
                'min_z' => self::VISIT_MIN_Z,
                'max_z' => self::VISIT_MAX_Z,
            ],
            'sites' => [
                self::northSite(self::layoutMaxZ($city)),
                self::southSite(self::layoutMinZ($city)),
            ],
        ];
    }

    /**
     * Large airport south of the city (+Z): east-west runway.
     *
     * @return array<string, mixed>
     */
    private static function northSite(float $lz): array
    {
        // lz = 160 for the shipped bounds: runway at 350, apron at 285.
        $standZ = $lz + 135;

        return [
            'id' => 'sul',
            'name' => 'Aeroporto City10 Sul',
            'code' => 'CTS',
            'runway' => [
                'center' => [0.0, $lz + 190],
                'length' => 180.0,
                'width' => 18.0,
                'axis' => 'x',
                'designators' => ['09', '27'],
            ],
            'taxiways' => [
                ['center' => [0.0, $lz + 160], 'length' => 170.0, 'width' => 10.0, 'axis' => 'x'],
                ['center' => [-80.0, $lz + 175], 'length' => 30.0, 'width' => 8.0, 'axis' => 'z'],
                ['center' => [80.0, $lz + 175], 'length' => 30.0, 'width' => 8.0, 'axis' => 'z'],
            ],
            'apron' => ['center' => [0.0, $lz + 125], 'size' => [170.0, 60.0]],
            'terminal' => ['center' => [-45.0, $lz + 105], 'size' => [80.0, 18.0]],
            'hangars' => [
                ['center' => [35.0, $lz + 106], 'size' => [26.0, 20.0]],
                ['center' => [65.0, $lz + 106], 'size' => [26.0, 20.0]],
            ],
            'tower' => ['center' => [10.0, $lz + 118]],
            'stands' => [
                [-70.0, $standZ],
                [-35.0, $standZ],
                [0.0, $standZ],
                [35.0, $standZ],
            ],
            'helipad' => ['center' => [-100.0, $lz + 165], 'radius' => 8.0],
        ];
    }

    /**
     * Regional airport north of the city (-Z): north-south runway.
     *
     * @return array<string, mixed>
     */
    private static function southSite(float $lz): array
    {
        // lz = -160 for the shipped bounds: runway centre at -300.
        $cZ = $lz - 140;

        return [
            'id' => 'norte',
            'name' => 'Aeroporto Regional do Norte',
            'code' => 'CRN',
            'runway' => [
                'center' => [-50.0, $cZ],
                'length' => 160.0,
                'width' => 14.0,
                'axis' => 'z',
                'designators' => ['18', '36'],
            ],
            'taxiways' => [
                ['center' => [-30.0, $cZ], 'length' => 150.0, 'width' => 8.0, 'axis' => 'z'],
                // Connectors aligned with the takeoff lineup (-240) and the
                // landing rollout exit (-370) so taxi paths stay on pavement.
                ['center' => [-40.0, $lz - 80], 'length' => 20.0, 'width' => 7.0, 'axis' => 'x'],
                ['center' => [-40.0, $lz - 210], 'length' => 20.0, 'width' => 7.0, 'axis' => 'x'],
            ],
            'apron' => ['center' => [15.0, $cZ], 'size' => [90.0, 140.0]],
            'terminal' => ['center' => [55.0, $lz - 95], 'size' => [34.0, 14.0]],
            'hangars' => [
                ['center' => [55.0, $lz - 205], 'size' => [24.0, 18.0]],
            ],
            'tower' => ['center' => [40.0, $lz - 80]],
            'stands' => [
                [0.0, $lz - 95],
                [0.0, $lz - 155],
                [30.0, $lz - 125],
                [30.0, $lz - 185],
            ],
            'helipad' => ['center' => [75.0, $lz - 85], 'radius' => 7.0],
        ];
    }
}