#include "ImportLocalRadarDialog.hpp"

#include <QDateTime>
#include <QDir>
#include <QFileDialog>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QLabel>
#include <QLineEdit>
#include <QMessageBox>
#include <QPushButton>
#include <QStandardPaths>
#include <QTreeWidget>
#include <QVBoxLayout>
#include "data/LocalRadarDatasetStore.hpp"
#include "data/LocalRadarScanner.hpp"

namespace geopro::app {

ImportLocalRadarDialog::ImportLocalRadarDialog(const QString& tmObjectId,
                                               QWidget* parent)
    : QDialog(parent), tmObjectId_(tmObjectId) {
    setWindowTitle(QStringLiteral("导入本地雷达数据"));
    setMinimumSize(560, 380);

    auto* lay = new QVBoxLayout(this);
    lay->setSpacing(12);

    // 路径选择行
    auto* pathLay = new QHBoxLayout();
    pathLay->addWidget(new QLabel(QStringLiteral("雷达数据文件夹："), this));
    pathEdit_ = new QLineEdit(this);
    pathEdit_->setReadOnly(true);
    pathEdit_->setPlaceholderText(QStringLiteral("请选择包含 .data/.head 的文件夹"));
    pathLay->addWidget(pathEdit_, 1);
    auto* browseBtn = new QPushButton(QStringLiteral("浏览…"), this);
    pathLay->addWidget(browseBtn);
    lay->addLayout(pathLay);

    // 扫描按钮
    scanBtn_ = new QPushButton(QStringLiteral("扫描测线"), this);
    scanBtn_->setEnabled(false);
    lay->addWidget(scanBtn_);

    // 扫描结果树
    resultTree_ = new QTreeWidget(this);
    resultTree_->setHeaderLabels(
        QStringList() << QStringLiteral("测线名称") << QStringLiteral("类型")
                    << QStringLiteral("通道数") << QStringLiteral("采样点数")
                    << QStringLiteral("道数") << QStringLiteral("频率(MHz)"));
    resultTree_->header()->setStretchLastSection(false);
    resultTree_->setColumnWidth(0, 180);
    resultTree_->setColumnWidth(1, 70);
    resultTree_->setColumnWidth(2, 60);
    resultTree_->setColumnWidth(3, 80);
    resultTree_->setColumnWidth(4, 60);
    resultTree_->setColumnWidth(5, 80);
    lay->addWidget(resultTree_, 1);

    // 状态标签
    statusLabel_ = new QLabel(this);
    statusLabel_->setWordWrap(true);
    lay->addWidget(statusLabel_);

    // 底部按钮
    auto* btnLay = new QHBoxLayout();
    btnLay->addStretch();
    okBtn_ = new QPushButton(QStringLiteral("导入"), this);
    okBtn_->setEnabled(false);
    okBtn_->setDefault(true);
    auto* cancelBtn = new QPushButton(QStringLiteral("取消"), this);
    btnLay->addWidget(okBtn_);
    btnLay->addWidget(cancelBtn);
    lay->addLayout(btnLay);

    QObject::connect(browseBtn, &QPushButton::clicked, this,
                     &ImportLocalRadarDialog::chooseFolder);
    QObject::connect(scanBtn_, &QPushButton::clicked, this,
                     &ImportLocalRadarDialog::performScan);
    QObject::connect(okBtn_, &QPushButton::clicked, this,
                     &ImportLocalRadarDialog::onConfirm);
    QObject::connect(cancelBtn, &QPushButton::clicked, this, &QDialog::reject);
}

void ImportLocalRadarDialog::chooseFolder() {
    const QString dir = QFileDialog::getExistingDirectory(
        this, QStringLiteral("选择雷达数据文件夹"), QString(),
        QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
    if (!dir.isEmpty()) {
        sourceDir_ = dir;
        pathEdit_->setText(dir);
        scanBtn_->setEnabled(true);
        okBtn_->setEnabled(false);
        resultTree_->clear();
        statusLabel_->clear();
    }
}

void ImportLocalRadarDialog::performScan() {
    if (sourceDir_.isEmpty()) return;
    resultTree_->clear();
    scanResults_ = geopro::data::LocalRadarScanner::scan(sourceDir_);

    for (const auto& s : scanResults_) {
        auto* item = new QTreeWidgetItem(resultTree_);
        item->setText(0, s.surveyName);
        item->setText(1, s.channelCount == 1 ? QStringLiteral("2D") : QStringLiteral("3D"));
        item->setText(2, QString::number(s.channelCount));
        item->setText(3, QString::number(s.meta.samples));
        item->setText(4, QString::number(s.meta.lastTrace));
        item->setText(5, QString::number(s.meta.frequency));
    }

    statusLabel_->setText(
        QStringLiteral("发现 %1 条测线").arg(scanResults_.size()));
    okBtn_->setEnabled(!scanResults_.empty());
}

void ImportLocalRadarDialog::copyDirectory(const QString& src, const QString& dst) {
    QDir srcDir(src);
    if (!srcDir.exists()) return;
    QDir dstDir(dst);
    if (!dstDir.exists()) dstDir.mkpath(QStringLiteral("."));

    for (const QString& entry : srcDir.entryList(QDir::Files)) {
        QFile::copy(srcDir.filePath(entry), dstDir.filePath(entry));
    }
    for (const QString& subdir : srcDir.entryList(QDir::Dirs | QDir::NoDotAndDotDot)) {
        copyDirectory(srcDir.filePath(subdir), dstDir.filePath(subdir));
    }
}

void ImportLocalRadarDialog::onConfirm() {
    if (scanResults_.empty()) return;

    // 目标目录：<AppData>/geopro/local_radar/<timestamp>/
    const QString baseDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)
                            + QStringLiteral("/local_radar/");
    const QString ts = QDateTime::currentDateTime().toString(QStringLiteral("yyyyMMdd_hhmmss"));
    const QString targetDir = baseDir + ts + QStringLiteral("/");

    // 复制源文件夹到目标目录
    copyDirectory(sourceDir_, targetDir);

    // 更新扫描结果的 folderPath 为复制后的路径
    for (auto& s : scanResults_) {
        s.folderPath = targetDir;
    }

    // 生成 DsRow
    auto rows = geopro::data::LocalRadarScanner::toDsRows(scanResults_);
    for (auto& row : rows) {
        row.structParentId = tmObjectId_.toStdString();
    }

    emit imported(tmObjectId_, rows);
    accept();
}

} // namespace geopro::app