#include "settlement_dialog.h"

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

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QTableWidget>
#include <QTableWidgetItem>
#include <QHeaderView>
#include <QPushButton>
#include <QTextEdit>
#include <QMessageBox>
#include <QDesktopServices>
#include <QUrl>
#include <QFile>
#include <QTextStream>
#include <iomanip>
#include <sstream>

SettlementDialog::SettlementDialog(core::HisCore& core, QWidget* parent)
    : QDialog(parent), core_(core) {
    setWindowTitle("结算单");
    setModal(false);
    setMinimumSize(800, 600);
    setupUI();
}

void SettlementDialog::setupUI() {
    QVBoxLayout* mainLayout = new QVBoxLayout(this);

    // Settlement ID
    QHBoxLayout* idLayout = new QHBoxLayout();
    idLayout->addWidget(new QLabel("结算单号:"));
    settlementIDEdit_ = new QLineEdit();
    settlementIDEdit_->setReadOnly(true);
    idLayout->addWidget(settlementIDEdit_);
    mainLayout->addLayout(idLayout);

    // Patient Info
    QHBoxLayout* patientLayout = new QHBoxLayout();
    patientLayout->addWidget(new QLabel("患者ID:"));
    patientIDEdit_ = new QLineEdit();
    patientIDEdit_->setReadOnly(true);
    patientLayout->addWidget(patientIDEdit_);
    patientLayout->addWidget(new QLabel("患者姓名:"));
    patientNameEdit_ = new QLineEdit();
    patientNameEdit_->setReadOnly(true);
    patientLayout->addWidget(patientNameEdit_);
    mainLayout->addLayout(patientLayout);

    // Discharge Date
    QHBoxLayout* dateLayout = new QHBoxLayout();
    dateLayout->addWidget(new QLabel("出院日期:"));
    dischargeDateEdit_ = new QLineEdit();
    dischargeDateEdit_->setReadOnly(true);
    dateLayout->addWidget(dischargeDateEdit_);
    mainLayout->addLayout(dateLayout);

    // Fee Items Table
    mainLayout->addWidget(new QLabel("费用明细:"));
    itemsTable_ = new QTableWidget();
    itemsTable_->setColumnCount(6);
    itemsTable_->setHorizontalHeaderLabels(
        {"项目名称", "项目类型", "数量", "单价", "金额", "支付方式"});
    itemsTable_->horizontalHeader()->setStretchLastSection(true);
    itemsTable_->setEditTriggers(QAbstractItemView::NoEditTriggers);
    mainLayout->addWidget(itemsTable_);

    // Summary Section
    QHBoxLayout* summaryLayout = new QHBoxLayout();
    totalAmountLabel_ = new QLabel("医疗总费用: ¥0.00");
    insurancePaidLabel_ = new QLabel("医保支付: ¥0.00");
    patientPaidLabel_ = new QLabel("患者自付: ¥0.00");
    summaryLayout->addWidget(totalAmountLabel_);
    summaryLayout->addWidget(insurancePaidLabel_);
    summaryLayout->addWidget(patientPaidLabel_);
    mainLayout->addLayout(summaryLayout);

    // Notes
    mainLayout->addWidget(new QLabel("备注:"));
    notesEdit_ = new QTextEdit();
    notesEdit_->setMaximumHeight(80);
    mainLayout->addWidget(notesEdit_);

    // Button Section
    QHBoxLayout* buttonLayout = new QHBoxLayout();
    printButton_ = new QPushButton("打印");
    connect(printButton_, &QPushButton::clicked, this, &SettlementDialog::onPrintSettlement);
    buttonLayout->addWidget(printButton_);

    exportButton_ = new QPushButton("导出");
    connect(exportButton_, &QPushButton::clicked, this, &SettlementDialog::onExportSettlement);
    buttonLayout->addWidget(exportButton_);

    confirmButton_ = new QPushButton("确认结算");
    connect(confirmButton_, &QPushButton::clicked, this, &SettlementDialog::onConfirmSettlement);
    buttonLayout->addWidget(confirmButton_);

    buttonLayout->addStretch();
    closeButton_ = new QPushButton("关闭");
    connect(closeButton_, &QPushButton::clicked, this, &SettlementDialog::onClose);
    buttonLayout->addWidget(closeButton_);

    mainLayout->addLayout(buttonLayout);
    setLayout(mainLayout);
}

void SettlementDialog::displaySettlement(const QString& settlementID) {
    currentSettlementID_ = settlementID;
    loadSettlementDetails();
}

bool SettlementDialog::createNewSettlement(const QString& patientID, const QString& patientName,
                                          const QString& dischargeDate) {
    std::string outSettlementID;
    if (core_.settlementService.generateSettlement(patientID.toStdString(),
                                                   patientName.toStdString(),
                                                   dischargeDate.toStdString(),
                                                   outSettlementID)) {
        currentSettlementID_ = QString::fromStdString(outSettlementID);
        loadSettlementDetails();
        return true;
    }
    return false;
}

void SettlementDialog::loadSettlementDetails() {
    const Settlement* settlement = core_.settlementService.findSettlement(currentSettlementID_.toStdString());
    if (!settlement) {
        QMessageBox::warning(this, "错误", "结算单不存在");
        return;
    }

    settlementIDEdit_->setText(QString::fromStdString(settlement->SettlementID));
    patientIDEdit_->setText(QString::fromStdString(settlement->PatientID));
    patientNameEdit_->setText(QString::fromStdString(settlement->PatientName));
    dischargeDateEdit_->setText(QString::fromStdString(settlement->DischargeDate));

    // Clear and populate items table
    itemsTable_->setRowCount(0);
    int row = 0;
    for (const auto& item : settlement->Items) {
        itemsTable_->insertRow(row);

        itemsTable_->setItem(row, 0, new QTableWidgetItem(QString::fromStdString(item.ItemName)));
        itemsTable_->setItem(row, 1, new QTableWidgetItem(QString::fromStdString(item.ItemType)));
        itemsTable_->setItem(row, 2, new QTableWidgetItem(QString::number(item.Quantity, 'f', 2)));
        itemsTable_->setItem(row, 3, new QTableWidgetItem(QString::number(item.UnitPrice, 'f', 2)));
        itemsTable_->setItem(row, 4, new QTableWidgetItem(QString::number(item.Amount, 'f', 2)));
        itemsTable_->setItem(row, 5, new QTableWidgetItem(QString::fromStdString(item.PaymentMethod)));

        row++;
    }

    // Update summary labels
    totalAmountLabel_->setText(QString("医疗总费用: ¥%1").arg(settlement->TotalAmount, 0, 'f', 2));
    insurancePaidLabel_->setText(QString("医保支付: ¥%1").arg(settlement->InsurancePaid, 0, 'f', 2));
    patientPaidLabel_->setText(QString("患者自付: ¥%1").arg(settlement->PatientPaid, 0, 'f', 2));

    notesEdit_->setText(QString::fromStdString(settlement->Notes));
}

void SettlementDialog::onPrintSettlement() {
    if (currentSettlementID_.isEmpty()) {
        QMessageBox::warning(this, "警告", "没有选择结算单");
        return;
    }

    auto report = core_.settlementService.generateSettlementReport(currentSettlementID_.toStdString());
    QMessageBox msgBox(this);
    msgBox.setWindowTitle("结算单");
    msgBox.setText(QString::fromStdString(report));
    msgBox.setTextFormat(Qt::PlainText);
    msgBox.exec();
}

void SettlementDialog::onExportSettlement() {
    if (currentSettlementID_.isEmpty()) {
        QMessageBox::warning(this, "警告", "没有选择结算单");
        return;
    }

    const Settlement* settlement = core_.settlementService.findSettlement(currentSettlementID_.toStdString());
    if (!settlement) {
        QMessageBox::warning(this, "错误", "结算单不存在");
        return;
    }

    QString fileName = QString("settlement_%1.txt").arg(QString::fromStdString(settlement->SettlementID));
    QFile file(fileName);
    if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
        QTextStream out(&file);
        out << QString::fromStdString(core_.settlementService.generateSettlementReport(currentSettlementID_.toStdString()));
        file.close();
        QMessageBox::information(this, "成功", "结算单已导出到: " + fileName);
    } else {
        QMessageBox::warning(this, "失败", "无法导出结算单");
    }
}

void SettlementDialog::onConfirmSettlement() {
    if (currentSettlementID_.isEmpty()) {
        QMessageBox::warning(this, "警告", "没有选择结算单");
        return;
    }

    if (core_.settlementService.completeSettlement(currentSettlementID_.toStdString())) {
        QMessageBox::information(this, "成功", "结算单已确认");
        loadSettlementDetails();
    } else {
        QMessageBox::warning(this, "失败", "无法确认结算单");
    }
}

void SettlementDialog::onClose() {
    accept();
}

void SettlementDialog::refreshDisplay() {
    if (!currentSettlementID_.isEmpty()) {
        loadSettlementDetails();
    }
}