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

#include "shader.h"
#include "shadermaterial.h"
#include "assert/assert.h"
#include "log/log.h"

shader_t *bound = NULL;

errorret_t shaderInit(shader_t *shader, const shaderdefinition_t *def) {
  assertNotNull(shader, "Shader cannot be null");
  errorChain(shaderInitPlatform(shader, def));
  bound = NULL;
  errorOk();
}

errorret_t shaderBind(shader_t *shader) {
  assertNotNull(shader, "Shader cannot be null");
  errorChain(shaderBindPlatform(shader));
  bound = shader;
  errorOk();
}

errorret_t shaderSetMatrix(
  shader_t *shader,
  const char_t *name,
  mat4 matrix
) {
  assertNotNull(shader, "Shader cannot be null");
  assertStrLenMin(name, 1, "Uniform name cannot be empty");
  assertNotNull(matrix, "Matrix cannot be null");
  assertTrue(bound == shader, "Shader must be bound.");
  errorChain(shaderSetMatrixPlatform(shader, name, matrix));
  errorOk();
}

errorret_t shaderSetTexture(
  shader_t *shader,
  const char_t *name,
  texture_t *texture
) {
  assertNotNull(shader, "Shader cannot be null");
  assertStrLenMin(name, 1, "Uniform name cannot be empty");
  assertTrue(bound == shader, "Shader must be bound.");
  errorChain(shaderSetTexturePlatform(shader, name, texture));
  errorOk();
}

errorret_t shaderSetColor(
  shader_t *shader,
  const char_t *name,
  color_t color
) {
  assertNotNull(shader, "Shader cannot be null");
  assertStrLenMin(name, 1, "Uniform name cannot be empty");
  assertTrue(bound == shader, "Shader must be bound.");
  errorChain(shaderSetColorPlatform(shader, name, color));
  errorOk();
}

errorret_t shaderSetMaterial(
  shader_t *shader,
  const shadermaterial_t *material
) {
  assertNotNull(shader, "Shader cannot be null");
  assertNotNull(material, "Material cannot be null");
  assertTrue(bound == shader, "Shader must be bound.");
  assertNotNull(shader->definition, "Shader definition cannot be null");
  assertNotNull(shader->definition->setMaterial, "Def lacks setMaterial");
  return shader->definition->setMaterial(shader, material);
}

errorret_t shaderDispose(shader_t *shader) {
  assertNotNull(shader, "Shader cannot be null");
  bound = NULL;
  errorChain(shaderDisposePlatform(shader));
  errorOk();
}