#include "signaltrimwidget.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QGroupBox>
#include <QScrollArea>
#include <QFrame>
#include <cmath>

static const char *GROUP_STYLE = R"(
    QGroupBox {
        background-color: white;
        border: 1px solid #e0e0e0;
        border-radius: 12px;
        margin-top: 8px;
        padding: 16px;
        font-size: 14px;
        font-weight: 600;
    }
    QGroupBox::title {
        subcontrol-origin: margin;
        left: 16px;
        padding: 0 8px;
        color: #333;
    }
)";

static const char *BUTTON_STYLE = R"(
    QPushButton {
        background-color: #2196F3;
        color: white;
        border: none;
        border-radius: 8px;
        padding: 12px 32px;
        font-size: 14px;
        font-weight: 600;
    }
    QPushButton:hover {
        background-color: #1976D2;
    }
    QPushButton:pressed {
        background-color: #1565C0;
    }
    QPushButton:disabled {
        background-color: #BDBDBD;
    }
)";

static const char *TRIM_BUTTON_STYLE = R"(
    QPushButton {
        background-color: #ff9800;
        color: white;
        border: none;
        border-radius: 8px;
        padding: 12px 20px;
        font-size: 28px;
        font-weight: bold;
        min-width: 60px;
        min-height: 50px;
    }
    QPushButton:hover {
        background-color: #f57c00;
    }
    QPushButton:pressed {
        background-color: #ef6c00;
    }
)";

SignalTrimWidget::SignalTrimWidget(QWidget *parent)
    : QWidget(parent), m_currentValue(0), m_minValue(-100), m_maxValue(100), m_decimals(4)
{
  setupUI();
  updateTotalValue();
}

void SignalTrimWidget::setupUI()
{
  QVBoxLayout *mainLayout = new QVBoxLayout(this);
  mainLayout->setContentsMargins(0, 0, 0, 0);
  mainLayout->setSpacing(0);

  // 标题栏
  mainLayout->addWidget(createTitleBar());

  // 内容区域
  QScrollArea *scrollArea = new QScrollArea;
  scrollArea->setWidgetResizable(true);
  scrollArea->setFrameShape(QFrame::NoFrame);
  scrollArea->setStyleSheet("QScrollArea { background-color: #f5f5f5; }");

  QWidget *contentWidget = new QWidget;
  contentWidget->setStyleSheet("background-color: #f5f5f5;");
  QVBoxLayout *contentLayout = new QVBoxLayout(contentWidget);
  contentLayout->setContentsMargins(20, 20, 20, 20);
  contentLayout->setSpacing(16);

  // 信号选择面板
  contentLayout->addWidget(createSignalSelectPanel());

  // 粗调面板
  contentLayout->addWidget(createCoarseAdjustPanel());

  // 微调面板
  contentLayout->addWidget(createFineAdjustPanel());

  // 输出面板
  contentLayout->addWidget(createOutputPanel());

  contentLayout->addStretch();

  scrollArea->setWidget(contentWidget);
  mainLayout->addWidget(scrollArea, 1);
}

QWidget *SignalTrimWidget::createTitleBar()
{
  QWidget *titleBar = new QWidget;
  titleBar->setFixedHeight(60);
  titleBar->setStyleSheet("background: qlineargradient(x1:0, y1:0, x2:1, y2:0, stop:0 #1976D2, stop:1 #1565C0);");

  QHBoxLayout *layout = new QHBoxLayout(titleBar);
  layout->setContentsMargins(16, 0, 16, 0);

  // 返回按钮
  m_backBtn = new QPushButton("← 返回");
  m_backBtn->setCursor(Qt::PointingHandCursor);
  m_backBtn->setStyleSheet(R"(
    QPushButton {
        background: rgba(255,255,255,0.2);
        color: white;
        border: none;
        border-radius: 6px;
        padding: 8px 16px;
        font-size: 14px;
    }
    QPushButton:hover {
        background: rgba(255,255,255,0.3);
    }
  )");
  connect(m_backBtn, &QPushButton::clicked, this, &SignalTrimWidget::backRequested);
  layout->addWidget(m_backBtn);

  // 标题（居中）
  m_titleLabel = new QLabel("信号微调");
  m_titleLabel->setStyleSheet("color: white; font-size: 18px; font-weight: bold;");
  m_titleLabel->setAlignment(Qt::AlignCenter);
  layout->addWidget(m_titleLabel, 1);

  // 右侧占位，保持标题居中
  QWidget *spacer = new QWidget;
  spacer->setFixedWidth(m_backBtn->sizeHint().width());
  layout->addWidget(spacer);

  return titleBar;
}

QWidget *SignalTrimWidget::createSignalSelectPanel()
{
  QGroupBox *group = new QGroupBox("信号选择");
  group->setStyleSheet(GROUP_STYLE);

  QHBoxLayout *layout = new QHBoxLayout(group);
  layout->setContentsMargins(16, 24, 16, 16);
  layout->setSpacing(24);

  // 信号类型
  QVBoxLayout *typeLayout = new QVBoxLayout;
  QLabel *typeLabel = new QLabel("信号类型");
  typeLabel->setStyleSheet("color: #666; font-size: 12px; font-weight: normal;");
  m_signalTypeCombo = new QComboBox;
  m_signalTypeCombo->addItems({"直流电压 (DC V)",
                               "直流电流 (DC mA)",
                               "交流电压 (AC V)",
                               "电阻 (Ω)",
                               "热电偶 (°C)",
                               "热电阻 (°C)",
                               "频率 (Hz)"});
  m_signalTypeCombo->setStyleSheet(R"(
    QComboBox {
        background: white;
        border: 1px solid #ddd;
        border-radius: 6px;
        padding: 10px 16px;
        min-width: 180px;
        font-size: 14px;
    }
  )");
  connect(m_signalTypeCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
          this, &SignalTrimWidget::onSignalTypeChanged);
  typeLayout->addWidget(typeLabel);
  typeLayout->addWidget(m_signalTypeCombo);
  layout->addLayout(typeLayout);

  // 单位选择
  QVBoxLayout *unitLayout = new QVBoxLayout;
  QLabel *unitLabel = new QLabel("单位");
  unitLabel->setStyleSheet("color: #666; font-size: 12px; font-weight: normal;");
  m_unitCombo = new QComboBox;
  m_unitCombo->addItems({"V", "mV", "µV"});
  m_unitCombo->setStyleSheet(R"(
    QComboBox {
        background: white;
        border: 1px solid #ddd;
        border-radius: 6px;
        padding: 10px 16px;
        min-width: 100px;
        font-size: 14px;
    }
  )");
  unitLayout->addWidget(unitLabel);
  unitLayout->addWidget(m_unitCombo);
  layout->addLayout(unitLayout);

  layout->addStretch();

  return group;
}

QWidget *SignalTrimWidget::createCoarseAdjustPanel()
{
  QGroupBox *group = new QGroupBox("粗调");
  group->setStyleSheet(GROUP_STYLE);

  QHBoxLayout *layout = new QHBoxLayout(group);
  layout->setContentsMargins(16, 24, 16, 16);
  layout->setSpacing(16);

  QLabel *valueLabel = new QLabel("设定值:");
  valueLabel->setStyleSheet("font-size: 16px; font-weight: 600;");
  layout->addWidget(valueLabel);

  m_coarseValueSpin = new QDoubleSpinBox;
  m_coarseValueSpin->setRange(m_minValue, m_maxValue);
  m_coarseValueSpin->setValue(0);
  m_coarseValueSpin->setDecimals(m_decimals);
  m_coarseValueSpin->setSingleStep(1.0);
  m_coarseValueSpin->setStyleSheet(R"(
    QDoubleSpinBox {
        padding: 12px 16px;
        border: 2px solid #2196F3;
        border-radius: 8px;
        background: white;
        font-size: 24px;
        font-weight: bold;
        font-family: monospace;
        min-width: 200px;
    }
    QDoubleSpinBox::up-button, QDoubleSpinBox::down-button {
        subcontrol-origin: border;
        width: 32px;
        border-left: 2px solid #2196F3;
        background: #e3f2fd;
    }
    QDoubleSpinBox::up-button { subcontrol-position: top right; border-top-right-radius: 6px; }
    QDoubleSpinBox::down-button { subcontrol-position: bottom right; border-bottom-right-radius: 6px; }
    QDoubleSpinBox::up-button:hover, QDoubleSpinBox::down-button:hover { background: #bbdefb; }
    QDoubleSpinBox::up-arrow { image: url(:/icons/arrow_up.svg); width: 14px; height: 14px; }
    QDoubleSpinBox::down-arrow { image: url(:/icons/arrow_down.svg); width: 14px; height: 14px; }
  )");
  connect(m_coarseValueSpin, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
          this, &SignalTrimWidget::onCoarseValueChanged);
  layout->addWidget(m_coarseValueSpin);

  m_coarseUnitLabel = new QLabel("V");
  m_coarseUnitLabel->setStyleSheet("font-size: 20px; font-weight: bold; color: #2196F3;");
  layout->addWidget(m_coarseUnitLabel);

  layout->addStretch();

  // 快捷设置按钮
  QVBoxLayout *presetLayout = new QVBoxLayout;
  QLabel *presetLabel = new QLabel("快捷设置:");
  presetLabel->setStyleSheet("color: #666; font-size: 12px;");
  presetLayout->addWidget(presetLabel);

  QHBoxLayout *presetBtnLayout = new QHBoxLayout;
  QStringList presets = {"0", "1", "5", "10", "20"};
  for (const QString &preset : presets)
  {
    QPushButton *btn = new QPushButton(preset);
    btn->setStyleSheet(R"(
      QPushButton {
          background-color: #e3f2fd;
          color: #1976D2;
          border: 1px solid #90caf9;
          border-radius: 6px;
          padding: 8px 16px;
          font-weight: 600;
      }
      QPushButton:hover {
          background-color: #bbdefb;
      }
    )");
    btn->setCursor(Qt::PointingHandCursor);
    connect(btn, &QPushButton::clicked, this, [this, preset]()
            { m_coarseValueSpin->setValue(preset.toDouble()); });
    presetBtnLayout->addWidget(btn);
  }
  presetLayout->addLayout(presetBtnLayout);
  layout->addLayout(presetLayout);

  return group;
}

QWidget *SignalTrimWidget::createFineAdjustPanel()
{
  QGroupBox *group = new QGroupBox("微调");
  group->setStyleSheet(GROUP_STYLE);

  QVBoxLayout *mainLayout = new QVBoxLayout(group);
  mainLayout->setContentsMargins(16, 24, 16, 16);
  mainLayout->setSpacing(16);

  // 步进选择
  QHBoxLayout *stepLayout = new QHBoxLayout;
  QLabel *stepLabel = new QLabel("微调步进:");
  stepLabel->setStyleSheet("font-weight: 600;");
  stepLayout->addWidget(stepLabel);

  m_stepSizeCombo = new QComboBox;
  m_stepSizeCombo->addItems({"0.0001", "0.001", "0.01", "0.1", "1"});
  m_stepSizeCombo->setCurrentIndex(1); // 默认 0.001
  m_stepSizeCombo->setStyleSheet(R"(
    QComboBox {
        background: white;
        border: 1px solid #ddd;
        border-radius: 6px;
        padding: 8px 12px;
        min-width: 100px;
    }
  )");
  connect(m_stepSizeCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
          this, [this](int)
          { updateSliderRange(); });
  stepLayout->addWidget(m_stepSizeCombo);
  stepLayout->addStretch();
  mainLayout->addLayout(stepLayout);

  // 微调控制
  QHBoxLayout *trimLayout = new QHBoxLayout;
  trimLayout->setSpacing(16);

  // 减少按钮
  m_decrementBtn = new QPushButton("-");
  m_decrementBtn->setStyleSheet(TRIM_BUTTON_STYLE);
  m_decrementBtn->setCursor(Qt::PointingHandCursor);
  connect(m_decrementBtn, &QPushButton::clicked, this, &SignalTrimWidget::onDecrementClicked);
  trimLayout->addWidget(m_decrementBtn);

  // 微调值显示
  m_fineValueSpin = new QDoubleSpinBox;
  m_fineValueSpin->setRange(-10, 10);
  m_fineValueSpin->setValue(0);
  m_fineValueSpin->setDecimals(4);
  m_fineValueSpin->setSingleStep(0.001);
  m_fineValueSpin->setPrefix("微调: ");
  m_fineValueSpin->setStyleSheet(R"(
    QDoubleSpinBox {
        padding: 12px 16px;
        border: 2px solid #ff9800;
        border-radius: 8px;
        background: #fff3e0;
        font-size: 18px;
        font-weight: bold;
        font-family: monospace;
        min-width: 180px;
    }
    QDoubleSpinBox::up-button, QDoubleSpinBox::down-button {
        subcontrol-origin: border;
        width: 28px;
        border-left: 2px solid #ff9800;
        background: #ffe0b2;
    }
    QDoubleSpinBox::up-button { subcontrol-position: top right; border-top-right-radius: 6px; }
    QDoubleSpinBox::down-button { subcontrol-position: bottom right; border-bottom-right-radius: 6px; }
    QDoubleSpinBox::up-button:hover, QDoubleSpinBox::down-button:hover { background: #ffcc80; }
    QDoubleSpinBox::up-arrow { image: url(:/icons/arrow_up.svg); width: 12px; height: 12px; }
    QDoubleSpinBox::down-arrow { image: url(:/icons/arrow_down.svg); width: 12px; height: 12px; }
  )");
  connect(m_fineValueSpin, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
          this, &SignalTrimWidget::onFineValueChanged);
  trimLayout->addWidget(m_fineValueSpin);

  // 增加按钮
  m_incrementBtn = new QPushButton("+");
  m_incrementBtn->setStyleSheet(TRIM_BUTTON_STYLE);
  m_incrementBtn->setCursor(Qt::PointingHandCursor);
  connect(m_incrementBtn, &QPushButton::clicked, this, &SignalTrimWidget::onIncrementClicked);
  trimLayout->addWidget(m_incrementBtn);

  trimLayout->addStretch();
  mainLayout->addLayout(trimLayout);

  // 滑块微调
  QHBoxLayout *sliderLayout = new QHBoxLayout;
  QLabel *minLabel = new QLabel("-1.000");
  minLabel->setStyleSheet("color: #666; font-family: monospace;");
  sliderLayout->addWidget(minLabel);

  m_fineSlider = new QSlider(Qt::Horizontal);
  m_fineSlider->setRange(-1000, 1000);
  m_fineSlider->setValue(0);
  m_fineSlider->setStyleSheet(R"(
    QSlider::groove:horizontal {
        border: 1px solid #bbb;
        background: #e0e0e0;
        height: 8px;
        border-radius: 4px;
    }
    QSlider::handle:horizontal {
        background: #ff9800;
        border: 2px solid #f57c00;
        width: 24px;
        margin: -8px 0;
        border-radius: 12px;
    }
    QSlider::handle:horizontal:hover {
        background: #ffa726;
    }
    QSlider::sub-page:horizontal {
        background: #ffcc80;
        border-radius: 4px;
    }
  )");
  connect(m_fineSlider, &QSlider::valueChanged, this, &SignalTrimWidget::onSliderChanged);
  sliderLayout->addWidget(m_fineSlider, 1);

  QLabel *maxLabel = new QLabel("+1.000");
  maxLabel->setStyleSheet("color: #666; font-family: monospace;");
  sliderLayout->addWidget(maxLabel);

  mainLayout->addLayout(sliderLayout);

  return group;
}

QWidget *SignalTrimWidget::createOutputPanel()
{
  QGroupBox *group = new QGroupBox("最终输出");
  group->setStyleSheet(GROUP_STYLE);

  QHBoxLayout *layout = new QHBoxLayout(group);
  layout->setContentsMargins(16, 24, 16, 16);
  layout->setSpacing(24);

  // 总值显示
  m_totalValueLabel = new QLabel("0.0000 V");
  m_totalValueLabel->setStyleSheet(R"(
    QLabel {
        background: qlineargradient(x1:0, y1:0, x2:0, y2:1,
            stop:0 #1a1a2e, stop:1 #16213e);
        color: #00ff88;
        border: 2px solid #00aa55;
        border-radius: 12px;
        padding: 20px 40px;
        font-size: 36px;
        font-weight: bold;
        font-family: 'Courier New', monospace;
        min-width: 300px;
    }
  )");
  m_totalValueLabel->setAlignment(Qt::AlignCenter);
  layout->addWidget(m_totalValueLabel);

  layout->addStretch();

  // 控制按钮
  QVBoxLayout *btnLayout = new QVBoxLayout;
  btnLayout->setSpacing(12);

  m_applyBtn = new QPushButton("应用输出");
  m_applyBtn->setStyleSheet(BUTTON_STYLE);
  m_applyBtn->setCursor(Qt::PointingHandCursor);
  connect(m_applyBtn, &QPushButton::clicked, this, &SignalTrimWidget::onApplyOutput);
  btnLayout->addWidget(m_applyBtn);

  m_resetBtn = new QPushButton("重置归零");
  m_resetBtn->setStyleSheet(R"(
    QPushButton {
        background-color: #757575;
        color: white;
        border: none;
        border-radius: 8px;
        padding: 12px 32px;
        font-size: 14px;
        font-weight: 600;
    }
    QPushButton:hover {
        background-color: #616161;
    }
  )");
  m_resetBtn->setCursor(Qt::PointingHandCursor);
  connect(m_resetBtn, &QPushButton::clicked, this, &SignalTrimWidget::onResetValue);
  btnLayout->addWidget(m_resetBtn);

  layout->addLayout(btnLayout);

  return group;
}

void SignalTrimWidget::onSignalTypeChanged(int index)
{
  // 根据信号类型更新单位选项
  m_unitCombo->clear();
  switch (index)
  {
  case 0: // DC V
    m_unitCombo->addItems({"V", "mV", "µV"});
    m_coarseUnitLabel->setText("V");
    m_minValue = -100;
    m_maxValue = 100;
    m_decimals = 4;
    break;
  case 1: // DC mA
    m_unitCombo->addItems({"mA", "µA"});
    m_coarseUnitLabel->setText("mA");
    m_minValue = -30;
    m_maxValue = 30;
    m_decimals = 4;
    break;
  case 2: // AC V
    m_unitCombo->addItems({"V", "mV"});
    m_coarseUnitLabel->setText("V");
    m_minValue = 0;
    m_maxValue = 300;
    m_decimals = 3;
    break;
  case 3: // Ω
    m_unitCombo->addItems({"Ω", "kΩ", "MΩ"});
    m_coarseUnitLabel->setText("Ω");
    m_minValue = 0;
    m_maxValue = 10000;
    m_decimals = 2;
    break;
  case 4: // 热电偶
  case 5: // 热电阻
    m_unitCombo->addItems({"°C"});
    m_coarseUnitLabel->setText("°C");
    m_minValue = -200;
    m_maxValue = 1800;
    m_decimals = 2;
    break;
  case 6: // Hz
    m_unitCombo->addItems({"Hz", "kHz", "MHz"});
    m_coarseUnitLabel->setText("Hz");
    m_minValue = 0;
    m_maxValue = 100000;
    m_decimals = 2;
    break;
  }

  m_coarseValueSpin->setRange(m_minValue, m_maxValue);
  m_coarseValueSpin->setDecimals(m_decimals);
  updateTotalValue();
}

void SignalTrimWidget::onCoarseValueChanged(double value)
{
  Q_UNUSED(value)
  updateTotalValue();
}

void SignalTrimWidget::onFineValueChanged(double value)
{
  // 更新滑块位置
  m_fineSlider->blockSignals(true);
  double step = m_stepSizeCombo->currentText().toDouble();
  m_fineSlider->setValue(static_cast<int>(value / step));
  m_fineSlider->blockSignals(false);

  updateTotalValue();
}

void SignalTrimWidget::onSliderChanged(int value)
{
  double step = m_stepSizeCombo->currentText().toDouble();
  m_fineValueSpin->setValue(value * step);
}

void SignalTrimWidget::onIncrementClicked()
{
  double step = m_stepSizeCombo->currentText().toDouble();
  m_fineValueSpin->setValue(m_fineValueSpin->value() + step);
}

void SignalTrimWidget::onDecrementClicked()
{
  double step = m_stepSizeCombo->currentText().toDouble();
  m_fineValueSpin->setValue(m_fineValueSpin->value() - step);
}

void SignalTrimWidget::onApplyOutput()
{
  // 应用输出值到设备
  m_currentValue = m_coarseValueSpin->value() + m_fineValueSpin->value();
  // TODO: 发送到硬件
}

void SignalTrimWidget::onResetValue()
{
  m_coarseValueSpin->setValue(0);
  m_fineValueSpin->setValue(0);
  m_fineSlider->setValue(0);
}

void SignalTrimWidget::updateTotalValue()
{
  double total = m_coarseValueSpin->value() + m_fineValueSpin->value();
  QString unit = m_coarseUnitLabel->text();
  m_totalValueLabel->setText(QString("%1 %2").arg(total, 0, 'f', m_decimals).arg(unit));
}

void SignalTrimWidget::updateSliderRange()
{
  double step = m_stepSizeCombo->currentText().toDouble();
  int range = static_cast<int>(1.0 / step);
  m_fineSlider->setRange(-range, range);
  m_fineValueSpin->setSingleStep(step);
}