/**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "shaderlist.h"
#include "display/screen/screen.h"
#include "assert/assert.h"

shaderlistdef_t SHADER_LIST_DEFS[SHADER_LIST_SHADER_COUNT] = {
  [SHADER_LIST_SHADER_UNLIT] = {
    .shader = &SHADER_UNLIT,
    .definition = &SHADER_UNLIT_DEFINITION
  },
};

errorret_t shaderListInit() {
  mat4 view, proj, model;
  glm_lookat(
    (vec3){ 0.0f, 0.0f, 1.0f },
    (vec3){ 0.0f, 0.0f, 0.0f },
    (vec3){ 0.0f, 1.0f, 0.0f },
    view
  );

  glm_perspective(
    glm_rad(45.0f),
    SCREEN.aspect,
    0.1f,
    100.0f,
    proj
  );

  glm_mat4_identity(model);

  for(shaderlistshader_t i = 0; i < SHADER_LIST_SHADER_COUNT; i++) {
    if(i == SHADER_LIST_SHADER_NULL) {
      continue;
    }

    assertNotNull(
      SHADER_LIST_DEFS[i].shader, "Shader cannot be null"
    );
    assertNotNull(
      SHADER_LIST_DEFS[i].definition, "Shader definition cannot be null"
    );

    errorChain(shaderInit(
      SHADER_LIST_DEFS[i].shader, SHADER_LIST_DEFS[i].definition
    ));
    errorChain(shaderBind(SHADER_LIST_DEFS[i].shader));
    errorChain(shaderSetMatrix(
      SHADER_LIST_DEFS[i].shader, SHADER_UNLIT_PROJECTION, proj
    ));
    errorChain(shaderSetMatrix(
      SHADER_LIST_DEFS[i].shader, SHADER_UNLIT_VIEW, view
    ));
    errorChain(shaderSetMatrix(
      SHADER_LIST_DEFS[i].shader, SHADER_UNLIT_MODEL, model
    ));
    errorChain(shaderSetTexture(
      SHADER_LIST_DEFS[i].shader, SHADER_UNLIT_TEXTURE, NULL
    ));
    errorChain(shaderSetColor(
      SHADER_LIST_DEFS[i].shader, SHADER_UNLIT_COLOR, COLOR_WHITE
    ));
  }

  errorOk();
}

errorret_t shaderListDispose(void) {
  for(shaderlistshader_t i = 0; i < SHADER_LIST_SHADER_COUNT; i++) {
    if(i == SHADER_LIST_SHADER_NULL) {
      continue;
    }

    assertNotNull(
      SHADER_LIST_DEFS[i].shader, "Shader cannot be null"
    );

    errorChain(shaderDispose(SHADER_LIST_DEFS[i].shader));
  }
  errorOk();
}