<?php

namespace App\Helpers;

class Horoscope
{
    private static array $signs = [
        ['name' => 'Capricorn',  'symbol' => '♑', 'element' => 'Earth', 'emoji' => '🐐', 'from' => [12, 22], 'to' => [1, 19],
         'traits' => ['Ambitious', 'Disciplined', 'Patient', 'Practical']],
        ['name' => 'Aquarius',   'symbol' => '♒', 'element' => 'Air',   'emoji' => '🏺', 'from' => [1, 20], 'to' => [2, 18],
         'traits' => ['Independent', 'Progressive', 'Humanitarian', 'Inventive']],
        ['name' => 'Pisces',     'symbol' => '♓', 'element' => 'Water', 'emoji' => '🐟', 'from' => [2, 19], 'to' => [3, 20],
         'traits' => ['Empathetic', 'Creative', 'Intuitive', 'Gentle']],
        ['name' => 'Aries',      'symbol' => '♈', 'element' => 'Fire',  'emoji' => '🐏', 'from' => [3, 21], 'to' => [4, 19],
         'traits' => ['Courageous', 'Energetic', 'Enthusiastic', 'Bold']],
        ['name' => 'Taurus',     'symbol' => '♉', 'element' => 'Earth', 'emoji' => '🐂', 'from' => [4, 20], 'to' => [5, 20],
         'traits' => ['Reliable', 'Patient', 'Devoted', 'Sensual']],
        ['name' => 'Gemini',     'symbol' => '♊', 'element' => 'Air',   'emoji' => '👥', 'from' => [5, 21], 'to' => [6, 20],
         'traits' => ['Adaptable', 'Curious', 'Witty', 'Expressive']],
        ['name' => 'Cancer',     'symbol' => '♋', 'element' => 'Water', 'emoji' => '🦀', 'from' => [6, 21], 'to' => [7, 22],
         'traits' => ['Caring', 'Protective', 'Intuitive', 'Emotional']],
        ['name' => 'Leo',        'symbol' => '♌', 'element' => 'Fire',  'emoji' => '🦁', 'from' => [7, 23], 'to' => [8, 22],
         'traits' => ['Confident', 'Dramatic', 'Creative', 'Generous']],
        ['name' => 'Virgo',      'symbol' => '♍', 'element' => 'Earth', 'emoji' => '🌾', 'from' => [8, 23], 'to' => [9, 22],
         'traits' => ['Analytical', 'Loyal', 'Practical', 'Diligent']],
        ['name' => 'Libra',      'symbol' => '♎', 'element' => 'Air',   'emoji' => '⚖️', 'from' => [9, 23], 'to' => [10, 22],
         'traits' => ['Diplomatic', 'Gracious', 'Fair-minded', 'Social']],
        ['name' => 'Scorpio',    'symbol' => '♏', 'element' => 'Water', 'emoji' => '🦂', 'from' => [10, 23], 'to' => [11, 21],
         'traits' => ['Passionate', 'Stubborn', 'Resourceful', 'Brave']],
        ['name' => 'Sagittarius','symbol' => '♐', 'element' => 'Fire',  'emoji' => '🏹', 'from' => [11, 22], 'to' => [12, 21],
         'traits' => ['Optimistic', 'Adventurous', 'Honest', 'Philosophical']],
    ];

    private static array $elementCompatibility = [
        'Fire'  => ['Fire' => 85, 'Air' => 80, 'Earth' => 45, 'Water' => 40],
        'Earth' => ['Earth' => 88, 'Water' => 82, 'Fire' => 45, 'Air' => 50],
        'Air'   => ['Air' => 84, 'Fire' => 80, 'Water' => 48, 'Earth' => 50],
        'Water' => ['Water' => 86, 'Earth' => 82, 'Fire' => 40, 'Air' => 48],
    ];

    public static function getSign(?string $birthday): ?array
    {
        if (! $birthday) return null;

        try {
            $date = new \DateTime($birthday);
        } catch (\Exception) {
            return null;
        }

        $month = (int) $date->format('n');
        $day   = (int) $date->format('j');

        foreach (self::$signs as $sign) {
            [$fm, $fd] = $sign['from'];
            [$tm, $td] = $sign['to'];

            if ($fm > $tm) {
                // Capricorn wraps year
                if (($month === $fm && $day >= $fd) || ($month === $tm && $day <= $td)) {
                    return $sign;
                }
            } else {
                if (($month === $fm && $day >= $fd) || ($month > $fm && $month < $tm) || ($month === $tm && $day <= $td)) {
                    return $sign;
                }
            }
        }

        return null;
    }

    public static function compatibility(?array $sign1, ?array $sign2): ?int
    {
        if (! $sign1 || ! $sign2) return null;

        $base = self::$elementCompatibility[$sign1['element']][$sign2['element']] ?? 50;

        // Same sign bonus
        if ($sign1['name'] === $sign2['name']) {
            $base = min(98, $base + 8);
        }

        // Deterministic jitter so different sign pairs within same element feel unique
        $seed = crc32($sign1['name'] . ':' . $sign2['name']);
        $jitter = (abs($seed) % 11) - 5;

        return max(20, min(99, $base + $jitter));
    }

    public static function elementColor(string $element): string
    {
        return match ($element) {
            'Fire'  => '#ff6b35',
            'Earth' => '#6abf69',
            'Air'   => '#64b5f6',
            'Water' => '#4fc3f7',
            default => '#aaa',
        };
    }
}