<?php

namespace App\Support;

use Illuminate\Support\Facades\Validator;

final class PromotionRules
{
    public const LOSS = 7;
    public const FIRST_DEPOSIT = 8;
    public const WHEEL = 9;
    public const TASKS = ['online', 'login', 'invite', 'deposit', 'team_deposit', 'bet', 'team_bet'];
    public const DAILY = ['online', 'login'];
    public const PRIZES = ['0-666', '100', '50', '200', '350', '500', '150', '366'];

    public static function supports(int $type): bool { return in_array($type, [7, 8, 9], true); }
    public static function types(): array { return [7 => '净亏邀请奖励', 8 => '首充奖励', 9 => '转盘活动']; }

    public static function defaults(int $type): array
    {
        $common = ['turnover_ratio' => '0.00'];
        return $common + match ($type) {
            7 => ['loss_amount' => '500.00', 'invite_count' => 3, 'reward_amount' => '500.00'],
            8 => ['min_deposit' => '100.00', 'reward_amount' => '10.00'],
            9 => ['completion_probability' => '20.00', 'online_seconds' => 3600,
                'deposit_amount' => '3000.00', 'team_deposit_amount' => '500.00',
                'bet_amount' => '5000.00', 'team_bet_amount' => '3000.00'],
            default => [],
        };
    }

    public static function normalize(int $type, array $input): array
    {
        $defaults = self::defaults($type);
        Validator::make(['params' => $input], ['params' => ['array:' . implode(',', array_keys($defaults))]])->validate();
        $data = array_replace($defaults, $input);
        $rules = [];
        foreach ($data as $key => $value) {
            $rules[$key] = match ($key) {
                'invite_count' => ['required', 'integer', 'min:1', 'max:1000'],
                'online_seconds' => ['required', 'integer', 'min:60', 'max:86400'],
                'completion_probability' => ['required', 'numeric', 'between:0,100', 'regex:/^\d{1,3}(\.\d{1,2})?$/'],
                'turnover_ratio' => ['required', 'numeric', 'between:0,10000', 'regex:/^\d{1,5}(\.\d{1,2})?$/'],
                default => ['required', 'numeric', 'gt:0', 'regex:/^\d{1,12}(\.\d{1,2})?$/'],
            };
        }
        Validator::make($data, $rules)->validate();
        foreach ($data as $key => $value) $data[$key] = in_array($key, ['invite_count', 'online_seconds'], true) ? (int)$value : bcadd((string)$value, '0', 2);
        return $data;
    }

    public static function draw(int $coins, bool $complete, string $probability, ?callable $random = null): array
    {
        $random ??= fn (int $min, int $max) => random_int($min, $max);
        $remaining = 66600 - $coins;
        if ($remaining <= 0) throw new \LogicException('请先领取本轮奖金');
        $hit = $complete && $random(1, 10000) <= (int)bcmul($probability, '100', 0);
        if ($hit) return ['prize_index' => 0, 'amount_cents' => $remaining, 'reached' => true];
        // Choose eligible sectors before drawing. A fixed face value is never truncated.
        $eligible = [0];
        foreach (self::PRIZES as $i => $amount) if ($i && (int)$amount * 100 < $remaining) $eligible[] = $i;
        $index = $eligible[$random(0, count($eligible) - 1)];
        $amount = $index === 0 ? $random(0, $remaining - 1) : (int)self::PRIZES[$index] * 100;
        return ['prize_index' => $index, 'amount_cents' => $amount, 'reached' => false];
    }
}