#include "includes.h"
extern const Touch_AreaTypeDef *pCurrentTouch_Area;
static int8_t s_mixer_focus = -1;

/* 0902-06 调音台：返回 + 标题；无底栏 */
const Touch_AreaTypeDef Touch_Mixer_Areas[] = {
	{  0,   44,   0,   40,   0, 0, GUI_CANCEL, NULL },
};

#define TOUCH_BTN_NUM     (sizeof(Touch_Mixer_Areas)/sizeof(Touch_AreaTypeDef))

/* 左→右 伴奏|弦|麦|麦混响；Flash 标签按内容挂接（13伴奏/14弦/15麦/16麦混响） */
static const uint32_t s_fader_label[4][3] = {   /* addr, w, h */
    { UI0902_TXT_MIXER_BAND_ADDR,    UI0902_TXT_MIXER_BAND_W,    UI0902_TXT_MIXER_BAND_H    },
    { UI0902_TXT_MIXER_GUITAR_ADDR,  UI0902_TXT_MIXER_GUITAR_W,  UI0902_TXT_MIXER_GUITAR_H  },
    { UI0902_TXT_MIXER_MIC_ADDR,     UI0902_TXT_MIXER_MIC_W,     UI0902_TXT_MIXER_MIC_H     },
    { UI0902_TXT_MIXER_VOCALFX_ADDR, UI0902_TXT_MIXER_VOCALFX_W, UI0902_TXT_MIXER_VOCALFX_H },
};

// ============================================================
// ????????????????????? / ?????????????
// ============================================================
void DrawFader(Fader_t *f)
{
    uint16_t cx = f->x + f->w / 2;
    uint16_t slider_y;
    LCD_FillByColor(cx - 20, f->y, cx + 20, f->y + f->h + 30, UI0902_BG_COLOR);
    LCD_WR_PIC_FROM_FLASH(cx - 15, f->y, 31, 215, UI0902_MIXER_TRACK_ADDR);
    LCD_WR_PIC_FROM_FLASH_Trans(cx - s_fader_label[f->id][1] / 2, f->y + f->h + 8,
                                (uint16_t)s_fader_label[f->id][1], (uint16_t)s_fader_label[f->id][2],
                                s_fader_label[f->id][0]);
    slider_y = CalcSliderY(f);
    DrawFaderSlider(f, slider_y);
    f->prev_slider_y = slider_y;
}

/* 四路推子写入 NVM 参数（仅 RAM；落盘由 save 调用方决定） */
static void SyncMixerFadersToNvm(void)
{
    NvmParam_Type *nvm = drv_nvm_param_ptr();
    nvm->param.BandVol   = faders[0].val;
    nvm->param.StringVol = faders[1].val;
    nvm->param.MIcVol    = faders[2].val;
    nvm->param.MicRev    = faders[3].val;
}

void DrawAllFaders(void)
{
    for (int i = 0; i < 4; i++) {
        DrawFader(&faders[i]);
    }
    SyncMixerFadersToNvm();
    drv_nvm_save_to_flash();
}

/* 0902-06：实心蓝色圆钮（勿用同心空心圆，会透出色条） */
#define MIXER_KNOB_R   14

static void DrawFaderSlider(Fader_t *f, uint16_t slider_y)
{
    uint16_t cx = f->x + f->w / 2;
    uint16_t ly = f->y + f->h + 8;
    uint16_t cy = (uint16_t)(slider_y + MIXER_KNOB_R);
    char buf[8];
    LCD_FillCircle(cx, cy, MIXER_KNOB_R, COLOR_GRAD_MID);
    sprintf(buf, "%d", f->val);
    LCD_ShowString_AutoAlign((uint16_t)(cx - 8), (uint16_t)(cx + 8),
                             (uint16_t)(cy - 5),
                             (uint8_t*)buf, LCD_ALIGN_CENTER, WHITE, COLOR_GRAD_MID, 0, 11);
    LCD_FillByColor(cx - 15, ly + 17, cx + 15, ly + 19, UI0902_BG_COLOR);
    if (s_mixer_focus == (int8_t)f->id)
        LCD_FillByColor(cx - 15, ly + 17, cx + 15, ly + 19, COLOR_GRAD_MID);
}

// ============================================================
// ???????????????????????????????????? Flash ????
// ============================================================
static void UpdateFaderSlider(Fader_t *f)
{
    uint16_t cx = f->x + f->w / 2;
    uint16_t new_y = CalcSliderY(f);
    if (f->prev_slider_y == new_y) return;
    LCD_WR_PIC_FROM_FLASH(cx - 15, f->y, 31, 215, UI0902_MIXER_TRACK_ADDR);
    DrawFaderSlider(f, new_y);
    f->prev_slider_y = new_y;
}

void UpdateFaderByTouch(int idx, uint16_t y)
{
    uint8_t val_127;
    uint8_t STR_val;
    if (idx < 0 || idx > 3) return;
    Fader_t *f = &faders[idx];
    if (s_mixer_focus != (int8_t)idx)
    {
        int8_t prev = s_mixer_focus;
        s_mixer_focus = (int8_t)idx;
        if (prev >= 0 && prev <= 3)
            DrawFaderSlider(&faders[prev], faders[prev].prev_slider_y);
    }
    uint16_t y_min = f->y;
    uint16_t y_max = f->y + f->h;
    if (y < y_min + 8) {
        f->val = 10;
    }
    else if (y > y_max - 8) {
        f->val = 0;
    }
    else {
        int32_t val_raw = 10 - ((int32_t)(y - y_min) * 10) / (y_max - y_min);
        if(val_raw < 0) val_raw = 0;
        if(val_raw > 10) val_raw = 10;
        f->val = val_raw;
    }
    UpdateFaderSlider(f);
    DrawFaderSlider(f, f->prev_slider_y);
    switch(idx) {
      case 0:
    	  val_127 = (f->val * 127) / 10;
    	  SendVolumeChangeMidiEvent(1,val_127);
    	  SendVolumeChangeMidiEvent(2,val_127);
    	  SendVolumeChangeMidiEvent(3,val_127);
    	  SendVolumeChangeMidiEvent(4,val_127);
    	  SendVolumeChangeMidiEvent(5,val_127);
    	  SendVolumeChangeMidiEvent(6,val_127);
    	  SendVolumeChangeMidiEvent(7,val_127);
    	  SendVolumeChangeMidiEvent(8,val_127);
    	  SendVolumeChangeMidiEvent(9,val_127);
    	  SendVolumeChangeMidiEvent(10,val_127);
    	  SendVolumeChangeMidiEvent(11,val_127);
    	  SendVolumeChangeMidiEvent(12,val_127);
    	  SendVolumeChangeMidiEvent(13,val_127);
    	  SendVolumeChangeMidiEvent(14,val_127);
    	  SendVolumeChangeMidiEvent(15,val_127);
        break;
      case 1:
    	  STR_val = (f->val * 127) / 10;
    	  SendVolumeChangeMidiEvent(0,STR_val);
        break;
      case 2:
        AW816_Set_Volume(MIC_VOL_MAP[f->val]);
        break;
      case 3:
        AW816_Set_Reverb(f->val * 10);
        break;
    }
    /* 即时生效同时更新 NVM 镜像；返回/关机时落盘 */
    SyncMixerFadersToNvm();
}

// ============================================================
// ??????Y????????val? 0~10??
// ============================================================
static uint16_t CalcSliderY(Fader_t *f)
{
    uint16_t slider_h = (uint16_t)(MIXER_KNOB_R * 2);
    uint16_t fill_h = (f->val * f->h) / 10;
    if (fill_h > f->h) fill_h = f->h;
    uint16_t slider_y = f->y + f->h - fill_h - (slider_h / 2);
    if (slider_y < f->y) slider_y = f->y;
    if (slider_y > f->y + f->h - slider_h) slider_y = f->y + f->h - slider_h;
    return slider_y;
}

int CheckTouchFader(uint16_t x, uint16_t y)
{
    for (int i = 0; i < 4; i++) {
        Fader_t *f = &faders[i];
        if (x >= f->x - 10 && x <= f->x + f->w + 10 &&
            y >= f->y && y <= f->y + f->h) {
            return i;
        }
    }
    return -1;
}

// ==================== ????? ====================
void UI_Mixer_Init(void)
{
    s_mixer_focus = -1;
    UI_ClearFocus();
    LCD_FillByColor(0, 0, 240, 320, UI0902_BG_COLOR);
    UI_DrawSubPageHeader((const uint8_t*)"\xB5\xF7\xD2\xF4\xCC\xA8");
    DrawAllFaders();
    pCurrentTouch_Area = Touch_Mixer_Areas;
}

// ==================== ???????? ====================
void UI_Mixer_Process(DisplayTaskMessage_Type msg)
{
  uint16_t tx,ty;
  int fader_idx;
  switch(msg.MessageType)
  {
     case MSG_ID_TOUCH:
       tx = msg.HiByte;
       ty = msg.LoByte;

       // 1. ?????????
       fader_idx = CheckTouchFader(tx, ty);
       if (fader_idx >= 0)
       {
               UpdateFaderByTouch(fader_idx, ty);
               return;
       }

       // 2. 返回 → 设置入口
       for(uint8_t i=0; i<TOUCH_BTN_NUM; i++)
       {
         if( tx >= Touch_Mixer_Areas[i].x_min && tx <= Touch_Mixer_Areas[i].x_max &&
             ty >= Touch_Mixer_Areas[i].y_min && ty <= Touch_Mixer_Areas[i].y_max )
         {
             if (Touch_Mixer_Areas[i].ID == GUI_CANCEL) {
                 SyncMixerFadersToNvm();
                 drv_nvm_save_to_flash();
                 MenuPage_SystemSetting_Proc();
             }
             break;
         }
       }
       ResetAutoPowerCount();
  break;

  case MSG_ID_EC_VOL:
  break;
  }
}