#include <cstdio>
#include "qmpchanneleditor.hpp"
#include "ui_qmpchanneleditor.h"
#include "qmpmainwindow.hpp"

qmpChannelEditor::qmpChannelEditor(QWidget *parent):
    QDialog(parent),
    ui(new Ui::qmpChannelEditor)
{
    ui->setupUi(this);
    ch = 0;
    styl = new QDialSkulptureStyle();
    dials = findChildren<QDial *>();
    for (auto &d : dials)
        d->setStyle(styl);
}

qmpChannelEditor::~qmpChannelEditor()
{
    delete styl;
    delete ui;
}

void qmpChannelEditor::setupWindow(int chid)
{
    char str[256];
    if (~chid)
        ch = chid;
    setWindowTitle(tr("Channel Parameter Editor - Channel #%1").arg(ch + 1));
    CMidiPlayer *player = qmpMainWindow::getInstance()->getPlayer();
    uint16_t b;
    uint8_t p;
    std::string pstn;
    if (!player->getChannelOutputDevice(ch)->getChannelPreset(ch, &b, &p, pstn))
    {
        b = player->getCC(ch, 0) << 7 | player->getCC(ch, 32);
        p = player->getCC(ch, 128);
        pstn = player->getChannelOutputDevice(ch)->getPresetName(b, p);
    }
    ui->lbPresetName->setText(pstn.c_str());
    sprintf(str, "BK: %03d", b);
    ui->lbBank->setText(str);
    sprintf(str, "PC: %03d", p);
    ui->lbPreset->setText(str);
    ui->lbChannelNumber->setText(QString::number(ch + 1));
    auto setupControl = [this, player](int ccid, QLabel *lb, QDial *d, QString ccname, std::function<QString(uint16_t)> valconv)
    {
        uint16_t b = player->getCC(ch, ccid);
        lb->setText(QString("%1 %2").arg(ccname).arg(valconv(b)));
        d->setValue(b);
    };
    auto defconv = std::bind(static_cast<QString(*)(uint, int)>(&QString::number), std::placeholders::_1, 10);
    auto panconv = [](uint v)->QString
    {
        if (v == 64)
            return tr("C");
        else if (v < 64)
            return tr("L%1").arg(64 - v);
        else return tr("R%1").arg(v - 64);
    };
    setupControl(7, ui->lbVol, ui->dVol, tr("Vol."), defconv);
    setupControl(91, ui->lbReverb, ui->dReverb, tr("Rev."), defconv);
    setupControl(93, ui->lbChorus, ui->dChorus, tr("Chr."), defconv);
    setupControl(71, ui->lbReso, ui->dReso, tr("Res."), defconv);
    setupControl(74, ui->lbCut, ui->dCut, tr("Cut."), defconv);
    setupControl(73, ui->lbAttack, ui->dAttack, tr("Atk."), defconv);
    setupControl(75, ui->lbDecay, ui->dDecay, tr("Dec."), defconv);
    setupControl(72, ui->lbRelease, ui->dRelease, tr("Rel."), defconv);
    setupControl(76, ui->lbRate, ui->dRate, tr("Rate"), defconv);
    setupControl(77, ui->lbDepth, ui->dDepth, tr("Dep."), defconv);
    setupControl(78, ui->lbDelay, ui->dDelay, tr("Del."), defconv);
    setupControl(10, ui->lbPan, ui->dPan, tr("Pan."), panconv);
}

void qmpChannelEditor::sendCC()
{
    CMidiPlayer *player = qmpMainWindow::getInstance()->getPlayer();
    player->setCC(ch, 7, ui->dVol->value());
    player->setCC(ch, 10, ui->dPan->value());
    player->setCC(ch, 91, ui->dReverb->value());
    player->setCC(ch, 93, ui->dChorus->value());
    player->setCC(ch, 71, ui->dReso->value());
    player->setCC(ch, 74, ui->dCut->value());
    player->setCC(ch, 73, ui->dAttack->value());
    player->setCC(ch, 75, ui->dDecay->value());
    player->setCC(ch, 72, ui->dRelease->value());
    player->setCC(ch, 76, ui->dRate->value());
    player->setCC(ch, 77, ui->dDepth->value());
    player->setCC(ch, 78, ui->dDelay->value());
    qmpMainWindow::getInstance()->invokeCallback("channel.ccchange", nullptr);
}

void qmpChannelEditor::showEvent(QShowEvent *e)
{
    knobpressed = 0;
    setupWindow();
    connectSlots();
    updconn = connect(qmpMainWindow::getInstance()->getTimer(), &QTimer::timeout, std::bind(&qmpChannelEditor::setupWindow, this, -1));
    e->accept();
}
void qmpChannelEditor::closeEvent(QCloseEvent *e)
{
    disconnectSlots();
    disconnect(updconn);
    e->accept();
}

void qmpChannelEditor::on_pbChLeft_clicked()
{
    disconnectSlots();
    if (ch > 0)
        --ch;
    else ch = 15;
    setupWindow();
    connectSlots();
}

void qmpChannelEditor::on_pbChRight_clicked()
{
    disconnectSlots();
    if (ch < 15)
        ++ch;
    else ch = 0;
    setupWindow();
    connectSlots();
}

void qmpChannelEditor::commonPressed()
{
    disconnect(updconn);
    knobpressed = 1;
}
void qmpChannelEditor::commonReleased()
{
    updconn = connect(qmpMainWindow::getInstance()->getTimer(), &QTimer::timeout, std::bind(&qmpChannelEditor::setupWindow, this, -1));
    sendCC();
    knobpressed = 0;
}
void qmpChannelEditor::commonChanged()
{
    if (knobpressed)
    {
        sendCC();
        setupWindow();
    }
}

void qmpChannelEditor::connectSlots()
{
    for (auto &d : dials)
    {
        connect(d, &QDial::sliderPressed, this, &qmpChannelEditor::commonPressed);
        connect(d, &QDial::sliderReleased, this, &qmpChannelEditor::commonReleased);
        connect(d, &QDial::valueChanged, this, &qmpChannelEditor::commonChanged);
    }
}

void qmpChannelEditor::disconnectSlots()
{
    for (auto &d : dials)
    {
        disconnect(d, &QDial::sliderPressed, this, &qmpChannelEditor::commonPressed);
        disconnect(d, &QDial::sliderReleased, this, &qmpChannelEditor::commonReleased);
        disconnect(d, &QDial::valueChanged, this, &qmpChannelEditor::commonChanged);
    }
}