<?php

namespace App\Module\Transfer\Exceptions;

/**
 * 余额不足异常
 */
class InsufficientBalanceException extends TransferException
{
    private int $userId;
    private int $fundId;
    private string $requiredAmount;
    private string $availableAmount;

    public function __construct(
        int $userId,
        int $fundId,
        string $requiredAmount,
        string $availableAmount,
        string $message = '余额不足'
    ) {
        $this->userId = $userId;
        $this->fundId = $fundId;
        $this->requiredAmount = $requiredAmount;
        $this->availableAmount = $availableAmount;

        $context = [
            'user_id' => $userId,
            'fund_id' => $fundId,
            'required_amount' => $requiredAmount,
            'available_amount' => $availableAmount,
            'shortage' => bcsub($requiredAmount, $availableAmount, 10),
        ];

        parent::__construct($message, 1001, null, $context);
    }

    /**
     * 获取用户ID
     */
    public function getUserId(): int
    {
        return $this->userId;
    }

    /**
     * 获取资金类型ID
     */
    public function getFundId(): int
    {
        return $this->fundId;
    }

    /**
     * 获取所需金额
     */
    public function getRequiredAmount(): string
    {
        return $this->requiredAmount;
    }

    /**
     * 获取可用金额
     */
    public function getAvailableAmount(): string
    {
        return $this->availableAmount;
    }

    /**
     * 获取缺少的金额
     */
    public function getShortage(): string
    {
        return bcsub($this->requiredAmount, $this->availableAmount, 10);
    }

    /**
     * 获取详细错误信息
     */
    public function getDetailedMessage(): string
    {
        return sprintf(
            '用户 %d 的资金类型 %d 余额不足，需要 %s，可用 %s，缺少 %s',
            $this->userId,
            $this->fundId,
            $this->requiredAmount,
            $this->availableAmount,
            $this->getShortage()
        );
    }
}