// /**
//  * Copyright (c) 2025 Dominic Masters
//  * 
//  * This software is released under the MIT License.
//  * https://opensource.org/licenses/MIT
//  */

#include "uitext.h"
#include "assert/assert.h"
#include "util/memory.h"
#include "display/spritebatch.h"

void uiTextDrawChar(
  const float_t x,
  const float_t y,
  const char_t c,
  const color_t color,
  const tileset_t *tileset,
  texture_t *texture
) {
  int32_t tileIndex = (int32_t)(c) - UI_TEXT_CHAR_START;
  if(tileIndex < 0 || tileIndex >= tileset->tileCount) {
    tileIndex = ((int32_t)'@') - UI_TEXT_CHAR_START;
  }

  assertTrue(
    tileIndex >= 0 && tileIndex <= tileset->tileCount,
    "Character is out of bounds for font tiles"
  );

  vec4 uv;
  tilesetTileGetUV(tileset, tileIndex, uv);

  spriteBatchPush(
    texture,
    x, y,
    x + tileset->tileWidth,
    y + tileset->tileHeight,
    color,
    uv[0], uv[1], uv[2], uv[3]
  );
}

void uiTextDraw(
  const float_t x,
  const float_t y,
  const char_t *text,
  const color_t color,
  const tileset_t *tileset,
  texture_t *texture
) {
  assertNotNull(text, "Text cannot be NULL");

  float_t posX = x;
  float_t posY = y;

  char_t c;
  int32_t i = 0;
  while((c = text[i++]) != '\0') {
    if(c == '\n') {
      posX = x;
      posY += tileset->tileHeight;
      continue;
    }

    if(c == ' ') {
      posX += tileset->tileWidth;
      continue;
    }

    uiTextDrawChar(posX, posY, c, color, tileset, texture);
    posX += tileset->tileWidth;
  }
}

void uiTextMeasure(
  const char_t *text,
  const tileset_t *tileset,
  int32_t *outWidth,
  int32_t *outHeight
) {
  assertNotNull(text, "Text cannot be NULL");
  assertNotNull(outWidth, "Output width pointer cannot be NULL");
  assertNotNull(outHeight, "Output height pointer cannot be NULL");

  int32_t width = 0;
  int32_t height = tileset->tileHeight;
  int32_t lineWidth = 0;

  char_t c;
  int32_t i = 0;
  while((c = text[i++]) != '\0') {
    if(c == '\n') {
      if(lineWidth > width) {
        width = lineWidth;
      }
      lineWidth = 0;
      height += tileset->tileHeight;
      continue;
    }

    lineWidth += tileset->tileWidth;
  }

  if(lineWidth > width) {
    width = lineWidth;
  }

  *outWidth = width;
  *outHeight = height;
}