<?php

declare(strict_types=1);

namespace Modules\RestaurantDelivery\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Modules\RestaurantDelivery\Traits\HasRestaurant;
use Modules\RestaurantDelivery\Traits\HasUuid;

class DeliveryZone extends Model
{
    use HasFactory, HasRestaurant, HasUuid, SoftDeletes;

    public const TABLE_NAME = 'restaurant_delivery_zones';

    protected $table = self::TABLE_NAME;

    protected $fillable = [
        'id',
        'uuid',
        'restaurant_id',
        'name',
        'slug',
        'description',
        'color',
        'coordinates',
        'min_lat',
        'max_lat',
        'min_lng',
        'max_lng',
        'priority',
        'is_active',
        'is_default',
        'max_delivery_distance',
        'operating_hours',
    ];

    protected $casts = [
        'coordinates' => 'array',
        'operating_hours' => 'array',
        'is_active' => 'boolean',
        'is_default' => 'boolean',
        'min_lat' => 'decimal:7',
        'max_lat' => 'decimal:7',
        'min_lng' => 'decimal:7',
        'max_lng' => 'decimal:7',
        'max_delivery_distance' => 'decimal:2',
    ];

    protected static function boot()
    {
        parent::boot();

        static::saving(function ($zone) {
            if (! empty($zone->coordinates)) {
                $zone->calculateBoundingBox();
            }
        });
    }

    /*
    |--------------------------------------------------------------------------
    | Relationships
    |--------------------------------------------------------------------------
    */

    public function pricingRules(): HasMany
    {
        return $this->hasMany(ZonePricingRule::class, 'zone_id')
            ->orderBy('priority');
    }

    public function activePricingRule(): HasMany
    {
        return $this->hasMany(ZonePricingRule::class, 'zone_id')
            ->where('is_active', true)
            ->orderBy('priority')
            ->limit(1);
    }

    public function deliveries(): HasMany
    {
        return $this->hasMany(Delivery::class, 'zone_id');
    }

    /*
    |--------------------------------------------------------------------------
    | Scopes
    |--------------------------------------------------------------------------
    */

    public function scopeActive($query)
    {
        return $query->where('is_active', true);
    }

    public function scopeDefault($query)
    {
        return $query->where('is_default', true);
    }

    public function scopeByPriority($query)
    {
        return $query->orderByDesc('priority');
    }

    /*
    |--------------------------------------------------------------------------
    | Methods
    |--------------------------------------------------------------------------
    */

    public function calculateBoundingBox(): void
    {
        if (empty($this->coordinates)) {
            return;
        }

        $lats = array_column($this->coordinates, 0);
        $lngs = array_column($this->coordinates, 1);

        $this->min_lat = min($lats);
        $this->max_lat = max($lats);
        $this->min_lng = min($lngs);
        $this->max_lng = max($lngs);
    }

    public function containsPoint(float $latitude, float $longitude): bool
    {
        // Quick bounding box check first
        if (
            $latitude < $this->min_lat ||
            $latitude > $this->max_lat ||
            $longitude < $this->min_lng ||
            $longitude > $this->max_lng
        ) {
            return false;
        }

        // Ray casting algorithm for polygon containment
        return $this->pointInPolygon($latitude, $longitude, $this->coordinates);
    }

    protected function pointInPolygon(float $latitude, float $longitude, array $polygon): bool
    {
        $n = count($polygon);
        $inside = false;

        $x = $longitude;
        $y = $latitude;

        $p1x = $polygon[0][1];
        $p1y = $polygon[0][0];

        for ($i = 1; $i <= $n; $i++) {
            $p2x = $polygon[$i % $n][1];
            $p2y = $polygon[$i % $n][0];

            if ($y > min($p1y, $p2y)) {
                if ($y <= max($p1y, $p2y)) {
                    if ($x <= max($p1x, $p2x)) {
                        if ($p1y != $p2y) {
                            $xinters = ($y - $p1y) * ($p2x - $p1x) / ($p2y - $p1y) + $p1x;
                        }
                        if ($p1x == $p2x || $x <= $xinters) {
                            $inside = ! $inside;
                        }
                    }
                }
            }

            $p1x = $p2x;
            $p1y = $p2y;
        }

        return $inside;
    }

    public function isOperatingNow(): bool
    {
        if (empty($this->operating_hours)) {
            return true; // No restrictions
        }

        $now = now();
        $dayName = strtolower($now->format('l'));

        if (! isset($this->operating_hours[$dayName])) {
            return false;
        }

        $hours = $this->operating_hours[$dayName];

        if (isset($hours['closed']) && $hours['closed']) {
            return false;
        }

        $openTime = \Carbon\Carbon::createFromTimeString($hours['open']);
        $closeTime = \Carbon\Carbon::createFromTimeString($hours['close']);

        // Handle overnight hours
        if ($closeTime->lt($openTime)) {
            return $now->gte($openTime) || $now->lte($closeTime);
        }

        return $now->between($openTime, $closeTime);
    }

    public function getActivePricingRule(): ?ZonePricingRule
    {
        return $this->pricingRules()
            ->where('is_active', true)
            ->orderBy('priority')
            ->first();
    }

    public function canDeliverTo(float $latitude, float $longitude): bool
    {
        if (! $this->is_active) {
            return false;
        }

        if (! $this->containsPoint($latitude, $longitude)) {
            return false;
        }

        if (! $this->isOperatingNow()) {
            return false;
        }

        return true;
    }

    public static function findForPoint(float $latitude, float $longitude): ?self
    {
        return static::active()
            ->byPriority()
            ->get()
            ->first(fn ($zone) => $zone->containsPoint($latitude, $longitude));
    }

    public static function getDefault(): ?self
    {
        return static::active()->default()->first();
    }
}