<?php

namespace App\Module\OpenAPI\Handlers\Fund;

use App\Module\OpenAPI\Handlers\BaseHandler;
use App\Module\OpenAPI\Services\ScopeService;
use App\Module\OpenAPI\Enums\SCOPE_TYPE;
use Illuminate\Http\JsonResponse;

/**
 * 资金余额Handler
 * 
 * 处理获取用户资金余额的业务逻辑
 */
class FundBalanceHandler extends BaseHandler
{
    public function __construct(ScopeService $scopeService)
    {
        parent::__construct($scopeService);
    }

    /**
     * 获取所需的权限范围
     *
     * @return SCOPE_TYPE[]
     */
    public function getRequiredScopes(): array
    {
        return [SCOPE_TYPE::FUND_READ];
    }

    /**
     * 处理获取资金余额请求
     *
     * @param array $data 请求数据
     * @param array $context 上下文信息
     * @return JsonResponse
     */
    protected function process(array $data, array $context = []): JsonResponse
    {
        // 验证请求参数
        $validationErrors = $this->validateData($data, [
            'user_id' => 'required|integer|min:1',
            'currency_types' => 'array',
            'currency_types.*' => 'string|max:20',
            'include_frozen' => 'boolean',
        ]);

        if ($validationErrors) {
            return $this->errorResponse('参数验证失败', $validationErrors, 422);
        }

        // 获取参数
        $userId = $data['user_id'];
        $currencyTypes = $data['currency_types'] ?? [];
        $includeFrozen = $data['include_frozen'] ?? false;

        // 调用Fund模块服务获取余额信息
        $balanceInfo = $this->getFundBalance($userId, $currencyTypes, $includeFrozen);

        if (!$balanceInfo) {
            return $this->errorResponse('用户不存在或无资金账户', null, 404);
        }

        // 记录操作日志
        $this->logAction('fund.balance.get', [
            'user_id' => $userId,
            'currency_types' => $currencyTypes,
            'include_frozen' => $includeFrozen,
        ], $context);

        return $this->successResponse('获取资金余额成功', $balanceInfo);
    }

    /**
     * 获取用户资金余额
     * 
     * 这里应该调用Fund模块的实际服务
     *
     * @param int $userId
     * @param array $currencyTypes
     * @param bool $includeFrozen
     * @return array|null
     */
    protected function getFundBalance(int $userId, array $currencyTypes, bool $includeFrozen): ?array
    {
        // TODO: 这里应该调用Fund模块的服务
        // 例如: return app(FundService::class)->getUserBalance($userId, $currencyTypes, $includeFrozen);
        
        // 暂时返回示例数据，等待与Fund模块集成
        $allCurrencies = [
            'GOLD' => '金币',
            'DIAMOND' => '钻石',
            'SILVER' => '银币',
            'ENERGY' => '能量',
            'EXP' => '经验值',
        ];

        // 如果指定了货币类型，只返回指定的
        $currencies = empty($currencyTypes) ? array_keys($allCurrencies) : $currencyTypes;
        
        $balances = [];
        $totalValue = 0;

        foreach ($currencies as $currencyType) {
            if (!isset($allCurrencies[$currencyType])) {
                continue;
            }

            $available = rand(1000, 50000) / 100; // 随机余额
            $frozen = $includeFrozen ? rand(0, 1000) / 100 : 0;
            $total = $available + $frozen;

            $balances[] = [
                'currency_type' => $currencyType,
                'currency_name' => $allCurrencies[$currencyType],
                'available' => number_format($available, 2, '.', ''),
                'frozen' => number_format($frozen, 2, '.', ''),
                'total' => number_format($total, 2, '.', ''),
                'last_updated' => now()->subMinutes(rand(1, 60))->toISOString(),
            ];

            // 简单的价值计算（假设汇率）
            $rate = ['GOLD' => 1, 'DIAMOND' => 10, 'SILVER' => 0.1, 'ENERGY' => 0.01, 'EXP' => 0.001][$currencyType] ?? 1;
            $totalValue += $total * $rate;
        }

        return [
            'user_id' => $userId,
            'balances' => $balances,
            'summary' => [
                'total_currencies' => count($balances),
                'estimated_value' => number_format($totalValue, 2, '.', ''),
                'value_currency' => 'GOLD',
            ],
            'account_info' => [
                'account_status' => 'active',
                'account_level' => rand(1, 10),
                'created_at' => now()->subDays(rand(30, 365))->toISOString(),
                'last_transaction' => now()->subHours(rand(1, 24))->toISOString(),
            ],
            'settings' => [
                'include_frozen' => $includeFrozen,
                'currency_filter' => $currencyTypes,
            ],
        ];
    }
}