#include "display.h"
#include "config.h"
#include "logo.h"


// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

static void drawStatusScreen(TFT_eSPI &tft,
                              uint16_t bgColour,
                              uint16_t letterColour,
                              const char *letter) {
    TFT_eSprite spr = TFT_eSprite(&tft);
    spr.createSprite(DISPLAY_W, DISPLAY_H);
    spr.fillSprite(bgColour);

    // Outer ring
    spr.drawCircle(DISPLAY_CX, DISPLAY_CY, DISPLAY_RADIUS,     COL_RING);
    spr.drawCircle(DISPLAY_CX, DISPLAY_CY, DISPLAY_RADIUS - 1, COL_RING);

    // "SYSTEM" label
    spr.setTextDatum(MC_DATUM);
    spr.setTextFont(2);
    spr.setTextColor(COL_LABEL, bgColour);
    spr.drawString("SYSTEM", DISPLAY_CX, 72);

    // Separator line under label
    spr.drawFastHLine(DISPLAY_CX - 55, 88, 110, COL_LABEL);

    // Large system letter (A or B)
    spr.setTextFont(8);   // large built-in font
    spr.setTextColor(letterColour, bgColour);
    spr.setTextDatum(MC_DATUM);
    spr.drawString(letter, DISPLAY_CX, 138);

    // Separator line above ACTIVE
    spr.drawFastHLine(DISPLAY_CX - 55, 164, 110, COL_LABEL);

    // "ACTIVE" label
    spr.setTextFont(2);
    spr.setTextColor(COL_LABEL, bgColour);
    spr.drawString("ACTIVE", DISPLAY_CX, 180);

    spr.pushSprite(0, 0);
    spr.deleteSprite();
}

// ---------------------------------------------------------------------------
// Public API
// ---------------------------------------------------------------------------

void displayInit(TFT_eSPI &tft) {
    tft.init();
    tft.setRotation(0);
    tft.fillScreen(TFT_BLACK);
}

void displayShowLogo(TFT_eSPI &tft) {
    drawLogo(tft);
}

void displayShowSystemA(TFT_eSPI &tft) {
    drawStatusScreen(tft, COL_BG_SYS_A, COL_LETTER_A, "A");
}

void displayShowSystemB(TFT_eSPI &tft) {
    drawStatusScreen(tft, COL_BG_SYS_B, COL_LETTER_B, "B");
}