#include "texture.h"
#include "log.h"

int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer, int font_size)
{
	text_texture->texture = NULL;
	text_texture->renderer = renderer;
	text_texture->font = TTF_OpenFont("FiraCode-Regular.ttf", font_size);
	if (!text_texture->font) {
		log_message(LOG_ERROR, "Failed to load font! TTF_Error: %s", TTF_GetError());
		return 0;
	}
	text_texture->width = 0;
	text_texture->height = 0;
	return 1;
}

int text_texture_load(text_texture* text_texture, char* string)
{
	if (text_texture->texture) {
		SDL_DestroyTexture(text_texture->texture);
		text_texture->texture = NULL;
	}

	SDL_Color text_color = { 255, 255, 255 };
	if (strlen(string) == 0) string = " ";
	SDL_Surface* text_surface = TTF_RenderText_Solid(text_texture->font, string, text_color);
	if (!text_surface) {
		log_message(LOG_ERROR, "Unable to render text surface! TTF_Error: %s", TTF_GetError());
		return 0;
	}

	SDL_Texture* texture = SDL_CreateTextureFromSurface(text_texture->renderer, text_surface);
	if (!texture) {
		log_message(LOG_ERROR, "Unable to create texture from rendered text! SDL_Error: %s", SDL_GetError());
		return 0;
	}

	text_texture->texture = texture;
	text_texture->width = text_surface->w;
	text_texture->height = text_surface->h;

	SDL_FreeSurface(text_surface);
	return 1;
}

int text_texture_render(text_texture* text_texture, int x, int y)
{
	if (!text_texture) {
		log_message(LOG_ERROR, "text_texture uninitialized");
		return 0;
	}
	if (!text_texture->texture) {
		log_message(LOG_ERROR, "text_texture->texture uninitialized");
		return 0;
	}

	int quad_width = text_texture->width;
	int quad_height = text_texture->height;
	SDL_Rect render_quad = { x, y, quad_width, quad_height };
	SDL_RenderCopy(text_texture->renderer, text_texture->texture, NULL, &render_quad);

	return 1;
}

void text_texture_destroy(text_texture* text_texture)
{
	if (!text_texture->texture) {
		return;
	}
	SDL_DestroyTexture(text_texture->texture);
	TTF_CloseFont(text_texture->font);
}

int text_texture_frame_init(text_texture_frame* text_texture_frame, int len, SDL_Renderer* renderer, int font_size)
{
	text_texture_frame->textures = malloc(len*sizeof(text_texture));
	for (int i = 0; i < len; i++) {
		text_texture_init(&text_texture_frame->textures[i], renderer, font_size);
		text_texture_load(&text_texture_frame->textures[i], "");
	}
	text_texture_frame->len = len;
	return 1;
}

int text_texture_frame_render(text_texture_frame* text_texture_frame, int x, int y)
{
	int text_y_offset_step = TTF_FontHeight(text_texture_frame->textures[0].font);
	int text_y_offset = y;
	for (int i = 0; i < text_texture_frame->len; i++) {
		text_texture_render(&text_texture_frame->textures[i], x, text_y_offset);
		text_y_offset += text_y_offset_step;
	}
	return 1;
}

void text_texture_frame_destroy(text_texture_frame* text_texture_frame)
{
	for (int i = 0; i < text_texture_frame->len; i++) {
		text_texture_destroy(&text_texture_frame->textures[i]);
	}
	free(text_texture_frame->textures);
	text_texture_frame->textures = NULL;
}