#include "settings.h"
#include "config.h"
#include <FS.h>

Settings settings;

Setting all_settings[] = {
	{"fps", &settings.fps, TYPE_UINT8},

	{"effects.big_clock.spacing", &settings.effects.big_clock.spacing, TYPE_UINT8},

	{"effects.confetti.pixels_per_loop", &settings.effects.confetti.pixels_per_loop, TYPE_UINT8},
	
	{"effects.blur2d.count", &settings.effects.blur2d.count, TYPE_UINT8},

	{"effects.cycle.random", &settings.effects.cycle.random, TYPE_BOOL},
	{"effects.cycle.time", &settings.effects.cycle.time, TYPE_UINT16},

	{"effects.dvd.width", &settings.effects.dvd.width, TYPE_UINT8},
	{"effects.dvd.height", &settings.effects.dvd.height, TYPE_UINT8},
	{"effects.dvd.speed", &settings.effects.dvd.speed, TYPE_UINT8},

	{"effects.dynamic.single_loop_time", &settings.effects.dynamic.single_loop_time, TYPE_UINT16},
	{"effects.dynamic.multi_loop_time", &settings.effects.dynamic.multi_loop_time, TYPE_UINT16},
	{"effects.dynamic.big_loop_time", &settings.effects.dynamic.big_loop_time, TYPE_UINT16},
	{"effects.dynamic.big_size", &settings.effects.dynamic.big_size, TYPE_UINT8},

	{"effects.fire.cooldown", &settings.effects.fire.cooldown, TYPE_UINT8},
	{"effects.fire.spark_chance", &settings.effects.fire.spark_chance, TYPE_UINT8},

	{"effects.firework.drag", &settings.effects.firework.drag, TYPE_UINT8},
	{"effects.firework.bounce", &settings.effects.firework.bounce, TYPE_UINT8},
	{"effects.firework.gravity", &settings.effects.firework.gravity, TYPE_UINT8},
	{"effects.firework.sparks", &settings.effects.firework.sparks, TYPE_UINT8},

	{"effects.gol.start_percentage", &settings.effects.gol.start_percentage, TYPE_UINT8},
	{"effects.gol.blend_speed", &settings.effects.gol.blend_speed, TYPE_UINT8},
	{"effects.gol.restart_after_steps", &settings.effects.gol.restart_after_steps, TYPE_UINT8},
	
	{"effects.lightspeed.count", &settings.effects.lightspeed.count, TYPE_UINT8},

	{"effects.matrix.length_min", &settings.effects.matrix.length_min, TYPE_UINT8},
	{"effects.matrix.length_max", &settings.effects.matrix.length_max, TYPE_UINT8},
	{"effects.matrix.speed_min", &settings.effects.matrix.speed_min, TYPE_UINT8},
	{"effects.matrix.speed_max", &settings.effects.matrix.speed_max, TYPE_UINT8},
	{"effects.matrix.count", &settings.effects.matrix.count, TYPE_UINT8},
	{"effects.matrix.random_count", &settings.effects.matrix.random_count, TYPE_UINT8},

	{"effects.sines.count", &settings.effects.sines.count, TYPE_UINT8},

	{"effects.snake.direction_change", &settings.effects.snake.direction_change, TYPE_UINT8},

	{"effects.tv_static.black_bar_speed", &settings.effects.tv_static.black_bar_speed, TYPE_UINT16},
};

const uint8_t all_settings_size = 32;

bool change_setting(const char* key, uint16_t new_value) {
	LOGln("Settings * Setting %s to new value %d.", key, new_value);
	Setting* s = NULL;
	for (uint8_t i=0; i<all_settings_size; i++) {
		s = &(all_settings[i]);

		if (strcmp(key, s->name)==0) {
			break;
		}
	}
	if (s==NULL) {
		LOGln("Settings * No setting matching the name %s found.", key);
		return false;
	}

	// Check data size
	if (s->type == TYPE_BOOL && new_value > 1) {
		LOGln("Settings * Data type of %s is boolean, but new value is > 1.", key);
		return false;
	}
	if (s->type == TYPE_UINT8 && new_value>0xFF) {
		LOGln("Settings * Data type of %s is uint8_t, but new value is > 0xFF.", key);
		return false;
	}

	*(s->value) = new_value;
	return true;
}

uint16_t setting_default(Setting* s) {
	Settings defaults;
	auto p_settings = std::addressof(settings);
	auto p_defaults = std::addressof(defaults);
	uint16_t* p_this = s->value;
	uint16_t diff = p_this - (uint16_t*)p_settings;
	uint16_t default_value = *((uint16_t*)p_defaults + diff);
	return default_value;
}

bool save_settings() {
	if (!SPIFFS.begin()) {
		LOGln("Settings * Could not open SPIFFS for saving.");
		return false;
	}

	File f = SPIFFS.open("/pitrix_settings.txt", "w");
	if (!f) {
		LOGln("Settings * Could not open /pitrix_settings.txt for writing.");
		return false;
	}

	Setting* s;
	for (uint8_t i=0; i<all_settings_size; i++) {
		s = &(all_settings[i]);
		uint16_t value = *(s->value);
		uint16_t default_value = setting_default(s);
		if (default_value != value) {
			char buf[50];
			snprintf(buf, 50, "%s=%d", s->name, value);
			LOGln("Saving: %s", buf);
			f.println(buf);
		}
	}

	f.close();
	return true;
}

bool load_settings() {
	if (!SPIFFS.begin()) {
		LOGln("Settings * Could not open SPIFFS for loading.");
		return false;
	}

	File f = SPIFFS.open("/pitrix_settings.txt", "r");
	if (!f) {
		LOGln("Settings * Could not open /pitrix_settings.txt for reading.");
		return false;
	}

	String s = f.readString();
	f.close();

	while (s.length() > 0) {
		int pos = s.lastIndexOf('\n');
		String part = s.substring(pos + 1);
		if (pos==-1) pos=0;
		s.remove(pos);
		pos = part.indexOf('=');
		if (pos < 1) continue;
		String key = part.substring(0, pos);
		uint16_t value = part.substring(pos + 1).toInt();
		change_setting(key.c_str(), value);
	}
	return true;
}