#ifndef SETTLEMENT_SERVICE_H
#define SETTLEMENT_SERVICE_H

#include <functional>
#include <string>

#include "core/his_context.h"
#include "models/settlement.h"

namespace core {

/**
 * 结算服务
 * 负责生成和管理结算单，与支付系统集成，在患者出院时自动生成结算单
 */
class SettlementService {
public:
    explicit SettlementService(HisContext& ctx);

    // 为患者生成结算单
    bool generateSettlement(const std::string& patientID,
                           const std::string& patientName,
                           const std::string& dischargeDate,
                           std::string& outSettlementID);

    // 查询结算单
    size_t settlementCount() const;
    const Settlement* findSettlement(const std::string& settlementId) const;
    Settlement* findSettlement(const std::string& settlementId);

    // 按患者ID查询结算单
    void findByPatientId(
        const std::string& patientId,
        const std::function<void(const std::string&, const Settlement&)>& visitor) const;

    // 遍历所有结算单
    void for_eachSettlement(
        const std::function<void(const std::string&, const Settlement&)>& visitor) const;

    // 添加费用项到结算单
    bool addItemToSettlement(const std::string& settlementId,
                            const SettlementItem& item,
                            bool isInsuranceCovered = false);

    // 计算结算单总额
    bool calculateSettlement(const std::string& settlementId);

    // 完成结算
    bool completeSettlement(const std::string& settlementId);

    // 获取患者的结算总额
    double getPatientTotalAmount(const std::string& patientId) const;

    // 获取患者的医保支付总额
    double getPatientInsurancePaid(const std::string& patientId) const;

    // 获取患者的自付总额
    double getPatientPatientPaid(const std::string& patientId) const;

    // 删除结算单
    bool removeSettlement(const std::string& settlementId);

    // 生成结算单详情报告（用于打印）
    std::string generateSettlementReport(const std::string& settlementId);

private:
    HisContext& ctx_;
};

} // namespace core

#endif