#pragma once

class tile_floor : public gameobject {
	public:
		unsigned int mvp_uniform, anim_uniform, v_attrib, c_attrib, program, vbuf, cbuf, ebuf;
		int init() override {
			// Initialization part
			float vertices[] = {
				1.0, -10,  1.0,
				1.0, -10,  -1.0,
				-1.0, -10,  -1.0,
				-1.0, -10,  1.0,
			};
			glGenBuffers(1, &vbuf);
			glBindBuffer(GL_SHADER_STORAGE_BUFFER, vbuf);
			glBufferData(GL_SHADER_STORAGE_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

			GLushort floor_elements[] = {
				0, 1, 2, 2, 3, 0,

			};
			glGenBuffers(1, &ebuf);
			glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebuf);
			glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(floor_elements), floor_elements, GL_STATIC_DRAW);

			program = make_program("floor_vertex_shader.glsl",0, 0, 0, "floor_fragment_shader.glsl");
			if (!program)
				return 1;

			v_attrib = glGetAttribLocation(program, "in_vertex");
			c_attrib = glGetAttribLocation(program, "in_color");
			mvp_uniform = glGetUniformLocation(program, "mvp");
			return 0;
		}
		void draw(glm::mat4 vp) override {
			glUseProgram(program);

			glEnableVertexAttribArray(v_attrib);
			glBindBuffer(GL_ARRAY_BUFFER, vbuf);
			glVertexAttribPointer(v_attrib, 3, GL_FLOAT, GL_FALSE, 0, 0);

			int size;
			glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebuf);
			glGetBufferParameteriv(GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &size);

			glUniformMatrix4fv(mvp_uniform, 1, 0, glm::value_ptr(vp));

			glDrawElementsInstanced(GL_TRIANGLES, size / sizeof(uint16_t), GL_UNSIGNED_SHORT, 0, 10000);
		}
};