#include <user_config.h>
#include <SmingCore/SmingCore.h>
#include "twi.h"

Timer procTimer;

uint8_t reg49_shadow = 0xc0;
uint8_t input_a = 0;
uint8_t input_b = 0;

static uint8_t get_reg49_value(void) {
	uint8_t val;

	// Enable only plugged-in ouputs.
	//val = (P0 & 0xc) << 4;
    val = 0xc << 4;

	// Prefer existing routings.
	if (input_a == ((reg49_shadow >> 2) & 3)) {
		val |= 0x10; // Select secondary RX for output A
	}
	if (input_b == ((reg49_shadow >> 2) & 3)) {
		val |= 0x20; // Select secondary RX for output B
	}

	// Update routing.
	switch (val & 0x30) {
	case 0x00:
		if (input_a == input_b) {
			val |= input_a;
			val |= (~input_a & 3) << 2;
		} else {
			if (input_a == ((reg49_shadow >> 2) & 3)) {
				val |= input_b;
				val |= input_a << 2;
				val |= 0x10; // Select secondary RX for output A
			} else {
				val |= input_a;
				val |= input_b << 2;
				val |= 0x20; // Select secondary RX for output B
			}
		}
		break;
	case 0x30:
		val |= ~input_a & 3;
		val |= input_a << 2;
		break;
	case 0x10:
		val |= input_b;
		val |= input_a << 2;
		break;
	case 0x20:
		val |= input_a;
		val |= input_b << 2;
		break;
	}

	return val;
}
uint8_t edidbuf[256] = {
    //0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 'x', 'D', 0x00
	/*0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x13, 0x02, 0x31, 0x32, 0x50, 0x44,
	0x2a, 0x11, 0x01, 0x03, 0x80, 0x00, 0x00, 0x78, 0x2a, 0xee, 0x95, 0xa3, 0x54, 0x4c, 0x99, 0x26,
	0x0f, 0x50, 0x54, 0x21, 0x08, 0x00, 0x61, 0x40, 0x81, 0xc0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x19, 0x64, 0x00, 0x40, 0x41, 0x00, 0x26, 0x30, 0xa0, 0x18, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 0x10, 0x09, 0x00, 0x00, 0x00, 0x1e,
	0x00, 0x00, 0x00, 0xfc, 0x00, 'M' , 'a' , 't' , 'r' , 'i' , 'x' , 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	0x00, 0x00, 0x00, 0xfd, 0x00, 0x17, 0x48, 0x01, 0xff, 0x1a, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
	0x01, 0xdc,

	0x02, 0x03, 0x1b, 0xc1,
	0x46, 0x84, 0x02, 0x03, 0x11, 0x12, 0x01,
	0x23, 0x09, 0x07, 0x07,
	0x83, 0x01, 0x00, 0x00,
	0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 0x80, 0x1e,
	0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 0x10, 0x09, 0x00, 0x00, 0x00, 0x1e,
	0x8c, 0x0a, 0xd0, 0x90, 0x20, 0x40, 0x31, 0x20, 0x0c, 0x40, 0x55, 0x00, 0x04, 0x03, 0x00, 0x00, 0x00, 0x18,
	0x8c, 0x0a, 0xd0, 0x90, 0x20, 0x40, 0x31, 0x20, 0x0c, 0x40, 0x55, 0x00, 0x10, 0x09, 0x00, 0x00, 0x00, 0x18,
	0x8c, 0x0a, 0xd0, 0x8a, 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0x04, 0x03, 0x00, 0x00, 0x00, 0x18,
	0x8c, 0x0a, 0xd0, 0x8a, 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0x10, 0x09, 0x00, 0x00, 0x00, 0x18,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe7,*/
  0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x34, 0xa9, 0x76, 0xd0,
  0x11, 0x00, 0x46, 0x14, 0x00, 0x11, 0x01, 0x03, 0x80, 0x00, 0x00, 0x78,
  0x0a, 0x69, 0xbe, 0xa6, 0x57, 0x53, 0xa6, 0x23, 0x0c, 0x48, 0x55, 0x00,
  0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c,
  0x16, 0x20, 0x58, 0x2c, 0x25, 0x00, 0xc4, 0x8e, 0x21, 0x00, 0x00, 0x9e,
  0x01, 0x1d, 0x80, 0xd0, 0x72, 0x1c, 0x16, 0x20, 0x10, 0x2c, 0x25, 0x80,
  0xc4, 0x8e, 0x21, 0x00, 0x00, 0x9e, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x41,
  0x58, 0x2d, 0x32, 0x30, 0x30, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3d, 0x1c, 0x44, 0x0f, 0x00, 0x0a,
  0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0x67, 0x02, 0x03, 0x16, 0x31,
  0x4a, 0x05, 0x14, 0x04, 0x13, 0x20, 0x02, 0x11, 0x01, 0x10, 0x1f, 0x66,
  0x03, 0x0c, 0x00, 0x10, 0x00, 0x00, 0x01, 0x1d, 0x80, 0x3e, 0x73, 0x38,
  0x2d, 0x40, 0x7e, 0x2c, 0x45, 0x80, 0xc4, 0x8e, 0x21, 0x00, 0x00, 0x1e,
  0x8c, 0x0a, 0xd0, 0x8a, 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00,
  0x13, 0x8e, 0x21, 0x00, 0x00, 0x18, 0x8c, 0x0a, 0xd0, 0x90, 0x20, 0x40,
  0x31, 0x20, 0x0c, 0x40, 0x55, 0x00, 0x13, 0x8e, 0x21, 0x00, 0x00, 0x18,
  0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
  0xc4, 0x8e, 0x21, 0x00, 0x00, 0x1e, 0x01, 0x1d, 0x00, 0xbc, 0x52, 0xd0,
  0x1e, 0x20, 0xb8, 0x28, 0x55, 0x40, 0xc4, 0x8e, 0x21, 0x00, 0x00, 0x1e,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0xa6
};

uint8_t i2cWrite(uint8_t addr, uint8_t reg, uint8_t value) {
    uint8_t err;

    Wire.beginTransmission(addr);
    Wire.write(reg);
    Wire.write(value);

    if ((err = Wire.endTransmission()) != 0) {
        debugf("i2c: write %02x:%02x = %02x - error %02x\r\n", addr, reg, value, err);
    }

    return err;
}

uint8_t i2cRead(uint8_t addr, uint8_t reg, uint8_t cnt = 1) {
    Wire.beginTransmission(addr);
    Wire.write(reg);
    if (Wire.endTransmission(false) != 0) {
        Serial.println("transmission end failed?");
    }
    Wire.requestFrom((int) addr, (int) cnt);
    //Serial.printf("Available: %d\r\n", Wire.available());
    return Wire.read();
}

uint8_t setEDID(uint8_t port, uint8_t* edid)
{
    byte err, address;
    int nDevices;

    if ((err = i2cWrite(0x64, 0x42, port)) != 0) {
        Serial.print("start error occured: ");
        Serial.println(err);
        return err;
    }

    uint8_t edidData[257];
    edidData[0] = 0xff;
    memcpy(edidData+1, edid, 256);
    if ((err = twi_writeTo(0x64, edidData, 257, true)) != 0) {
        Serial.printf("Edid write failed: %d\r\n", err);
    }

    if ((err = i2cWrite(0x64, 0x42, 0x3c)) != 0) {
        Serial.print("end error occured: ");
        Serial.println(err);
        return err;
    }

    return 0;
}

void select_output(char output)
{
	if (output == 0) {
		// Output A
		if (reg49_shadow & 0x10) {
			i2cWrite(0x65, 0x07, 0x02);
		} else {
			i2cWrite(0x65, 0x07, 0x00);
		}
	} else {
		// Output B
		if (reg49_shadow & 0x20) {
			i2cWrite(0x65, 0x07, 0x03);
		} else {
		    i2cWrite(0x65, 0x07, 0x01);
		}
	}
}

uint8_t matrixInit() {

    debugf("Logic reset...");
    i2cWrite(0x64, 0x40, 0x08);
    delay(500);
    debugf("Reset, clearing...");
    i2cWrite(0x64, 0x40, 0x00);

    setEDID(0, edidbuf);
    setEDID(1, edidbuf);
    setEDID(2, edidbuf);
    setEDID(3, edidbuf);

    i2cWrite(0x64, 0x2d, 0x82);
    i2cWrite(0x64, 0x40, 0x00);
    i2cWrite(0x64, 0x41, 0x00);
    i2cWrite(0x64, 0x42, 0x3f);
    i2cWrite(0x64, 0x43, 0x01);
    i2cWrite(0x64, 0x44, 0x43);
    i2cWrite(0x64, 0x45, 0x14);
    i2cWrite(0x64, 0x46, 0xe4);
    i2cWrite(0x64, 0x47, 0x80);
    i2cWrite(0x64, 0x48, 0x04);
    i2cWrite(0x64, 0x49, 0b01110000);
    i2cWrite(0x64, 0x4a, 0xcf); // 0xff
    //i2cWrite(0x64, 0x49, 0xc0);
    i2cWrite(0x64, 0x4b, 0b111111);

    uint8_t err;
    uint8_t physettings[4] = {0x4c, 0x02, 0x50, 0x00};

    if ((err = twi_writeTo(0x64, physettings, 4, true)) != 0) {
        Serial.printf("rxphy write failed: %d\r\n", err);
    }

    physettings[0] = 0x4d;
    physettings[1] = 0x16;
    physettings[2] = 0x41;

    if ((err = twi_writeTo(0x64, physettings, 3, true)) != 0) {
        Serial.printf("txphy write failed: %d\r\n", err);
    }
    Serial.printf("discharging txphy...");
    delay(1000);

    physettings[2] = 0x01;

    if ((err = twi_writeTo(0x64, physettings, 3, true)) != 0) {
        Serial.printf("txphy write failed: %d\r\n", err);
    }

    //i2cWrite(0x64, 0x4c, 0x76);


    /*debugf("reg49: %02x", get_reg49_value());
    reg49_shadow = get_reg49_value();
    i2cWrite(0x64, 0x49, reg49_shadow);*/

    //select_output(0);
    //i2cWrite(0x64, 0x0e, 0x01);
    //select_output(1);
    //i2cWrite(0x64, 0x0e, 0x01);

    // selectOutput(0);
    /*for (int i = 0; i < 4; i++) {
        i2cWrite(0x65, 0x07, i);
        i2cWrite(0x65, 0x0e, 0x01);
    }*/

    //i2cWrite(0x64, 0x49, 0xc0);
    //i2cWrite(0x64, 0x4a, 0b11000000);
    //i2cWrite(0x65, 0x0f, 0x10);
    //i2cWrite(0x64, 0x4a, 0b11101111);
}

void i2cDump(uint8_t addr) {
    for (int i = 0; i < 0x80; i++) {
        if (i % 16 == 0) Serial.printf("\r\n%02x: ", i);

        Serial.printf("%02x ", i2cRead(addr, i));
    }

    Serial.println();
}

void init()
{
	Serial.begin(SERIAL_BAUD_RATE); // 115200 by default
	Serial.systemDebugOutput(true); // Disable debug output
    Serial.setCallback(*[](Stream& src, char arrived, uint16_t available) {
        debugf("arrived: %02x", arrived);
        input_a = (arrived - 0x31) & 0x3;
        input_b = (arrived - 0x31) & 0x3;
        debugf("setting: %d", input_a);
        i2cWrite(0x64, 0x49, (0b01010000 | 0) | (input_b << 2));
        });
	WDT.enable(false); // First (but not the best) option: fully disable watch dog timer

	// Default I2C pins (SDA: 2, SCL:0)

	// You can change pins:
	//Wire.pins(14, 12); // SDA, SCL 

	Wire.begin(4, 5);
    Wire.setClock(300000);
    Wire.setClockStretchLimit(5*230);

    for ( int i = 0 ; i < 2; i++) {
        Serial.printf("Doing things in %d...\r\n", 2-i);
        delay(1000);
    }

    matrixInit();

	procTimer.initializeMs(500, *[]() {
        Serial.println(millis());
        Serial.println("Hello!");
        debugf("  int: %02x %02x %02x", i2cRead(0x64, 0x29, 3), Wire.read(), Wire.read());
        debugf("stat0: %02x", i2cRead(0x64, 0x3c));
        debugf("stat1: %02x", i2cRead(0x64, 0x3d));
        debugf("stat2: %02x", i2cRead(0x64, 0x3f));
        debugf("ctrl0: %02x", i2cRead(0x64, 0x40));
        debugf("ctrl1: %02x", i2cRead(0x64, 0x41));
        debugf("ctrl2: %02x", i2cRead(0x64, 0x42));
        debugf("ctrl3: %02x", i2cRead(0x64, 0x43));
        debugf("ctrl4: %02x", i2cRead(0x64, 0x44));
        debugf("ctrl5: %02x", i2cRead(0x64, 0x45));
        debugf("ctrl6: %02x", i2cRead(0x64, 0x46));
        debugf("ctrl7: %02x", i2cRead(0x64, 0x47));
        debugf("ctrl8: %02x", i2cRead(0x64, 0x48));
        debugf("ctrl9: %02x", i2cRead(0x64, 0x49));
        debugf("ctrl10: %02x", i2cRead(0x64, 0x4a));
        debugf("ctrl11: %02x", i2cRead(0x64, 0x4b));


        debugf("rxphy: %02x %02x %02x", i2cRead(0x64, 0x4c, 3), Wire.read(), Wire.read());
        debugf("txphy: %02x %02x", i2cRead(0x64, 0x4d, 2), Wire.read());
        //i2cDump(0x64);

        /*setEDID(0, edidbuf);
        setEDID(1, edidbuf);
        setEDID(2, edidbuf);
        setEDID(3, edidbuf);*/


        //Serial.println("====\n\n0x65 (0):");
        //select_output(0);
        //i2cDump(0x65);
        for (int port = 0; port < 4; port++) {
            Serial.printf("RX Port %d: ", port);
            i2cWrite(0x65, 0x07, port);
            uint8_t status = i2cRead(0x65, 0x07);
            if (status & 0x80) Serial.printf("online ");
            if (status & 0x40) Serial.printf("de ");
            if (status & 0x20) Serial.printf("hdmi ");
            if (status & 0x10) Serial.printf("enc ");

            uint8_t status2 = i2cRead(0x65, 0x08);
            if (status2 & 0x40) Serial.printf("vsync ");

            Serial.printf("[%02x ", i2cRead(0x65, 0x07));
            Serial.printf("%02x ", i2cRead(0x65, 0x08));
            Serial.printf("%02x ", i2cRead(0x65, 0x09));
            Serial.printf("%02x ", i2cRead(0x65, 0x0a));
            Serial.printf("%02x ", i2cRead(0x65, 0x0e));
            Serial.printf("%02x] \r\n", i2cRead(0x65, 0x0f));
        }

        for (int port = 0; port < 2; port++) {
            Serial.printf("TX Port %d: ", port);
            i2cWrite(0x65, 0x07, port << 2);

            uint8_t status = i2cRead(0x65, 0x08);
            if (status & 0x80) Serial.printf("mute ");
            if (status & 0x02) Serial.printf("enc_opt ");

            uint8_t status3 = i2cRead(0x65, 0x09);
            if (status3 & 0x04) Serial.printf("rsen ");

            uint8_t status4 = i2cRead(0x65, 0x0f);
            if (status4 & 0x01) Serial.printf("enc ");
            if (status4 & 0x02) Serial.printf("ri_rdy ");
            if (status4 & 0x10) Serial.printf("rptr ");

            uint8_t status5 = i2cRead(0x65, 0x0e);
            if (status5 & 0x01) Serial.printf("hdmi ");

            Serial.printf("[%02x ", i2cRead(0x65, 0x07));
            Serial.printf("%02x ", i2cRead(0x65, 0x08));
            Serial.printf("%02x ", i2cRead(0x65, 0x09));
            Serial.printf("%02x ", i2cRead(0x65, 0x0a));
            Serial.printf("%02x ", i2cRead(0x65, 0x0e));
            Serial.printf("%02x]\r\n", i2cRead(0x65, 0x0f));
        }
        //Serial.println("====\n\n0x65 (1):");
        //select_output(1);
        //i2cDump(0x65);

        //Serial.printf("%02x ", i2cRead(0x65, 0x07));
        //Serial.printf("%02x ", i2cRead(0x65, 0x09));
        //Serial.printf("%02x \r\n", i2cRead(0x65, 0x0f));
        }).start();
}