#include "mainwindow.h"
#include "ui_mainwindow.h"

#include "math/gnss_coordinate_convert.h"

#include <QFileDialog>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    setWindowTitle(tr("GPS Calculate Tool"));


#ifndef Q_OS_WASM
    ui->pushButton_SaveXY->setVisible(false);
    ui->pushButton_SaveLonLat->setVisible(false);
#endif
}

MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::on_pushButton_LonLatConvertXY_clicked()
{
    double x,y;
    double lon = ui->lineEdit_1_Lon->text().toDouble();
    double lat = ui->lineEdit_1_Lat->text().toDouble();

    GaussProjCal(lon,lat,&x,&y);

    ui->lineEdit_1_x->setText(QString::number(x,'f',3));
    ui->lineEdit_1_y->setText(QString::number(y,'f',3));
}


void MainWindow::on_pushButton_LonLatConvertRel_clicked()
{
    double lon_base,lat_base,heading_base;
    double lon_test,lat_test,heading_test;

    double x_base,y_base,hdg_base;
    double x_test,y_test,hdg_test;

    double x_rel,y_rel,hdg_rel;
    double x_rel_raw,y_rel_raw;

    double fDis;

    lon_base = ui->lineEdit_2_Lon->text().toDouble();
    lat_base = ui->lineEdit_2_Lat->text().toDouble();
    heading_base = ui->lineEdit_2_Heading->text().toDouble();

    lon_test = ui->lineEdit_2_Lon2->text().toDouble();
    lat_test = ui->lineEdit_2_Lat2->text().toDouble();
    heading_test = ui->lineEdit_2_Heading2->text().toDouble();


    GaussProjCal(lon_base,lat_base,&x_base,&y_base);
    GaussProjCal(lon_test,lat_test,&x_test,&y_test);

    fDis = sqrt(pow(x_test - x_base,2) +  pow(y_test - y_base,2));

    x_rel_raw = x_test - x_base;
    y_rel_raw = y_test - y_base;

    hdg_base = (90-heading_base)*M_PI/180.0;
    normalhdg(hdg_base);

    hdg_test = (90-heading_test)*M_PI/180.0;
    normalhdg(hdg_test);

    hdg_rel = hdg_test - hdg_base;
    normalhdg(hdg_rel);

    x_rel = x_rel_raw * cos(-hdg_base) - y_rel_raw * sin(-hdg_base);
    y_rel = x_rel_raw * sin(-hdg_base) - y_rel_raw * cos(-hdg_base);

    char strout[1000];
    char strtem[100];
    snprintf(strout,1000," Rel Value:\n");
    snprintf(strtem,100,"x:%6.3f\n",x_rel);strncat(strout,strtem,1000);
    snprintf(strtem,100,"y:%6.3f\n",y_rel);strncat(strout,strtem,1000);
    snprintf(strtem,100,"hdg:%11.9f\n",hdg_rel);strncat(strout,strtem,1000);
    snprintf(strtem,100,"\n Raw rel Value:\n");strncat(strout,strtem,1000);
    snprintf(strtem,100,"x_raw:%6.3f\n",x_rel_raw);strncat(strout,strtem,1000);
    snprintf(strtem,100,"y_raw:%6.3f\n",y_rel_raw);strncat(strout,strtem,1000);

    snprintf(strtem,100,"\n Point Distance:\n");strncat(strout,strtem,1000);
    snprintf(strtem,100,"Distance:%6.3f\n",fDis);strncat(strout,strtem,1000);

    double R;

    double theta = hdg_rel;
    if(theta >M_PI) theta = 2.0*M_PI - theta;
    theta = theta/2.0;
    if(sin(theta)>0)
    {
        R = fDis/(2.0*sin(theta));
        snprintf(strtem,100,"\n R:\n");strncat(strout,strtem,1000);
        snprintf(strtem,100,"R:%6.3f\n",R);strncat(strout,strtem,1000);
    }

    ui->plainTextEdit_Rel->setPlainText(strout);

}


void MainWindow::on_pushButton_RelConvertLonLat_clicked()
{
    double lon_base,lat_base,heading_base;
    double lon_test,lat_test,heading_test;

    double x_base,y_base,hdg_base;
    double x_test,y_test,hdg_test;

    double x_rel,y_rel,hdg_rel;
    double x_rel_raw,y_rel_raw;

    lon_base = ui->lineEdit_3_Lon->text().toDouble();
    lat_base = ui->lineEdit_3_Lat->text().toDouble();
    heading_base = ui->lineEdit_3_Heading->text().toDouble();

    x_rel = ui->lineEdit_3_x->text().toDouble();
    y_rel = ui->lineEdit_3_y->text().toDouble();
    hdg_rel = ui->lineEdit_3_hdg->text().toDouble();


    GaussProjCal(lon_base,lat_base,&x_base,&y_base);

    hdg_base = (90-heading_base)*M_PI/180.0;
    normalhdg(hdg_base);

    x_rel_raw = x_rel * cos(hdg_base) - y_rel * sin(hdg_base);
    y_rel_raw = x_rel * sin(hdg_base) - y_rel * cos(hdg_base);

    hdg_test = hdg_base + hdg_rel;

    heading_test = (M_PI/2.0 - hdg_test) * 180.0/M_PI;
    normalheading(heading_test);


    x_test = x_base + x_rel_raw;
    y_test = y_base + y_rel_raw;

    GaussProjInvCal(x_test,y_test,&lon_test,&lat_test);


    char strout[1000];
    char strtem[100];
    snprintf(strout,1000,"Lon Lat:\n");
    snprintf(strtem,100,"Lon:%11.8f\n",lon_test);strncat(strout,strtem,1000);
    snprintf(strtem,100,"Lat:%11.8f\n",lat_test);strncat(strout,strtem,1000);
    snprintf(strtem,100,"heading:%6.3f\n",heading_test);strncat(strout,strtem,1000);

    ui->plainTextEdit_LonLat->setPlainText(strout);

}


void MainWindow::normalheading(double & heading)
{
    while(heading>=360.0)heading = heading - 360.0;
    while(heading<0)heading = heading + 360.0;
}

void MainWindow::normalhdg(double & hdg)
{
    while(hdg >= (2.0*M_PI))hdg = hdg - M_PI * 2.0;
    while(hdg < 0)hdg  = hdg  + M_PI * 2.0;
}

void MainWindow::on_pushButton_SaveXY_clicked()
{

    double lon_base,lat_base,heading_base;
    double lon_test,lat_test,heading_test;


    lon_base = ui->lineEdit_2_Lon->text().toDouble();
    lat_base = ui->lineEdit_2_Lat->text().toDouble();
    heading_base = ui->lineEdit_2_Heading->text().toDouble();

    lon_test = ui->lineEdit_2_Lon2->text().toDouble();
    lat_test = ui->lineEdit_2_Lat2->text().toDouble();
    heading_test = ui->lineEdit_2_Heading2->text().toDouble();

    char strbase[1000];
    snprintf(strbase,1000,"From Value:\n   Base:%11.7f  %11.7f  %11.7f\n   Test:%11.7f  %11.7f  %11.7f\n\n",
             lon_base,lat_base,heading_base,lon_test,lat_test,heading_test);

    QByteArray ba1;
    ba1 = QByteArray::fromRawData(strbase,strnlen(strbase,1000));


    QString str = ui->plainTextEdit_Rel->toPlainText();
    QByteArray ba;
    ba = QByteArray::fromStdString(str.toStdString());
#ifdef Q_OS_WASM

    ba1.append(ba);
    QFileDialog::saveFileContent(ba1,"xy.txt");
#endif
}

//Qt使用Emscripten的文件系统，还提供其他API：

//    QFile可以照常使用。默认情况下，存储的文件进入MEMFS。
//    QSettings具有一个基于IndexedDB的后端；请注意，QSettings在WebAssembly上是异步的。请参阅[2]上的用法示例
//    QFileDialog :: getOpenFileContent（）打开一个本机文件对话框，用户可以在其中选择文件
//    QFileDialog :: saveFileContent（）通过文件下载将文件保存到本地文件系统

void MainWindow::on_pushButton_SaveLonLat_clicked()
{
    double lon_base,lat_base,heading_base;

    double x_rel,y_rel,hdg_rel;

    lon_base = ui->lineEdit_3_Lon->text().toDouble();
    lat_base = ui->lineEdit_3_Lat->text().toDouble();
    heading_base = ui->lineEdit_3_Heading->text().toDouble();

    x_rel = ui->lineEdit_3_x->text().toDouble();
    y_rel = ui->lineEdit_3_y->text().toDouble();
    hdg_rel = ui->lineEdit_3_hdg->text().toDouble();

    char strbase[1000];
    snprintf(strbase,1000,"From Value:\n   Base:%11.7f  %11.7f  %11.7f\n   Test:%11.7f  %11.7f  %11.7f\n\n",
             lon_base,lat_base,heading_base,x_rel,y_rel,hdg_rel);

    QByteArray ba1;
    ba1 = QByteArray::fromRawData(strbase,strnlen(strbase,1000));

    QString str = ui->plainTextEdit_LonLat->toPlainText();
    QByteArray ba;
    ba = QByteArray::fromStdString(str.toStdString());
#ifdef Q_OS_WASM

    ba1.append(ba);
    QFileDialog::saveFileContent(ba1,"lonlat.txt");
#endif
}