#include "effect_matrix.h"
#include "my_color_palettes.h"
#include "functions.h"

MatrixEffectColumn::MatrixEffectColumn(Window* win, uint8_t dir, bool rand) {
    window = win;
    _direction = dir;
    _random_direction = rand;
    restart(true);
}

void MatrixEffectColumn::restart(bool completely_random) {
	if (_random_direction) {
		_direction = random8(4);
	}

	if (completely_random) {
		x = random8(window->width)<<8;
		y = random8(window->height)<<8;
	} else {
		switch(_direction) {
			case DIR_NORTH:
				x = random8(window->width)<<8;
				y = (window->height - 1)<<8;
				break;
			case DIR_EAST:
				x = 0;
				y = random8(window->height)<<8;
				break;
			case DIR_SOUTH:
				x = random8(window->width)<<8;
				y = 0;
				break;
			case DIR_WEST:
				x = (window->width - 1)<<8;
				y = random8(window->height)<<8;
				break;
		}
	}

    length = random8(settings.effects.matrix.length_min, settings.effects.matrix.length_max);
    running = true;
    speed = random8(settings.effects.matrix.speed_min, settings.effects.matrix.speed_max);
}

void MatrixEffectColumn::advance(uint16_t ms) {
	switch(_direction) {
		case DIR_NORTH:
			y-=speed * ms;
			if ((y>>8) > window->height && (y>>8) + length > window->height) running=false;
			break;
		case DIR_EAST:
			x+=speed * ms;
			if ((x>>8) - length > window->width) running=false;
			break;
		case DIR_SOUTH:
			y+=speed * ms;
			if ((y>>8) - length > window->height) running=false;
			break;
		case DIR_WEST:
			x-=speed * ms;
			if ((x>>8) > window->width && (y>>8) + length > window->width) running=false;
			break;
	}
}

void MatrixEffectColumn::draw() {
	int16_t xdir = 0;
	int16_t ydir = 0;
	switch (_direction) {
		case DIR_NORTH: ydir = 0xFF; break;
		case DIR_EAST:  xdir = -0xFF; break;
		case DIR_SOUTH: ydir = -0xFF; break;
		case DIR_WEST:  xdir = 0xFF; break;
	}
    for(int i=0; i<length; i++) {
        CRGB color = _getColor(i);
        window->setSubPixel(x+(xdir*i), y+(ydir*i), &color);
    }
}

void MatrixEffectColumn::loop(uint16_t ms) {
    if (!running) {
        if (random8() < 20) {
            // Start the column again.
            restart(false);
        }
	} else {
		advance(ms);
		draw();
    }
}

CRGB MatrixEffectColumn::_getColor(uint8_t i) {
    CRGB color;
    if (i==0) {
        color = CRGB(255, 255, 255);
    } else {
        color = CHSV(83, 255, 255 * (length - i) / length);
    }
    return color;
}

CRGB RainbowMatrixEffectColumn::_getColor(uint8_t i) {
    CRGB color;
    if (i==0) {
        color = CRGB(255, 255, 255);
    } else {
        color = CHSV(255 * x / window->width, 255, 255 * (length - i) / length);
    }
    return color;
}

CRGB RandomMatrixEffectColumn::_getColor(uint8_t i) {
    CRGB color;
    //Serial.print("RandomMatrixEffectColumn::_getColor, hue="); Serial.println(_hue);
    if (i==0) {
        color = CRGB(255, 255, 255);
    } else {
        color = CHSV(_hue, 255, 255 * (length - i) / length);
    }
    return color;
}

void RandomMatrixEffectColumn::restart(bool completely_random) {
    MatrixEffectColumn::restart(completely_random);
    _hue = random8();
}










boolean MatrixEffect::can_be_shown_with_clock() { return true; };

MatrixEffect::MatrixEffect() {
	_columns = new MatrixEffectColumn* [window->width];
	for (int i=0; i<window->width; i++) _columns[i] = new MatrixEffectColumn(window, MatrixEffectColumn::DIR_SOUTH);
}

RandomMatrixEffect::RandomMatrixEffect() {
	// No need to initialize _columns, because that will have been done by ctor of MatrixEffect.
	for (int i=0; i<window->width; i++) {
		delete _columns[i];
		_columns[i] = new RandomMatrixEffectColumn(window, random8(4), true);
	}
}

RainbowMatrixEffect::RainbowMatrixEffect() {
	// No need to initialize _columns, because that will have been done by ctor of MatrixEffect.
	for (int i=0; i<window->width; i++) {
		delete columns[i];
		_columns[i] = new RainbowMatrixEffectColumn(window, MatrixEffectColumn::DIR_SOUTH);
	}
}

MatrixEffect::~MatrixEffect() {
    for (int i=0; i<window->width; i++) {
        delete _columns[i];
    }
	delete[] _columns;
}

void MatrixEffect::loop(uint16_t ms) {
    window->clear();
    for (int i=0; i<window->width; i++) _columns[i]->loop(ms);
}