/*

    flame m0dul - https://github.com/kiu/flame

*/

#include "basic/basic.h"
#include "core/i2c/i2c.h"
#include "basic/config.h"

#define FLAME_I2C_WRITE         0xC4
#define FLAME_I2C_READ          0xC5

#define FLAME_I2C_CR_INPUT      0x00
#define FLAME_I2C_CR_PSC0       0x01
#define FLAME_I2C_CR_PWM0       0x02
#define FLAME_I2C_CR_PSC1       0x03
#define FLAME_I2C_CR_PWM1       0x04
#define FLAME_I2C_CR_LS0        0x05

#define FLAME_I2C_LS0_OFF       0x00
#define FLAME_I2C_LS0_ON        0x01
#define FLAME_I2C_LS0_PWM0      0x02
#define FLAME_I2C_LS0_PWM1      0x03

#define FLAME_I2C_LS0_LED0      0x00
#define FLAME_I2C_LS0_LED1      0x02
#define FLAME_I2C_LS0_LED2      0x04
#define FLAME_I2C_LS0_LED3      0x06

#define FLAME_OFF               0x00
#define FLAME_UP                0x01
#define FLAME_UP_WAIT           0x02
#define FLAME_DOWN              0x03
#define FLAME_DOWN_WAIT         0x04

/**************************************************************************/

#define flameBrightnessMax GLOBAL(flamemax)
#define flameBrightnessMin GLOBAL(flamemin)
#define flameSpeedUp       GLOBAL(flamespeed)
#define flameSpeedDown     GLOBAL(flamespeed)
#define flameWaitUp        GLOBAL(flamemaxw)
#define flameWaitDown      GLOBAL(flameminw)

uint8_t flameEnabled = 0;
uint8_t flameMode = FLAME_OFF;
uint8_t flameI2Cpwm = 0;
uint8_t flameTicks = 0;

uint32_t flameSetI2C(uint8_t cr, uint8_t value) {
    I2CMasterBuffer[0] = FLAME_I2C_WRITE;
    I2CMasterBuffer[1] = cr;
    I2CMasterBuffer[2] = value;
    I2CWriteLength = 3;
    I2CReadLength = 0;
    return i2cEngine();
}

void setFlamePWM() {
    flameSetI2C(FLAME_I2C_CR_PWM0, flameI2Cpwm); // set pwm
}

void tick_flame(void) { // every 10ms
    static char night=0;

    if (!flameEnabled) {
        return;
    }

    if (night != isNight()) {
        night = isNight();
        if (!night) {
            flameMode = FLAME_OFF;
            flameI2Cpwm = 0;
            push_queue(&setFlamePWM);
        };
    };

    flameTicks++;

    if (flameI2Cpwm > flameBrightnessMax) {
        flameI2Cpwm = flameBrightnessMax;
    }
    if (flameI2Cpwm < flameBrightnessMin) {
        flameI2Cpwm = flameBrightnessMin;
    }

    if (flameMode == FLAME_OFF) {
        if (isNight()) {
            flameTicks = 0;
            flameMode = FLAME_UP;
        }
    }

    if (flameMode == FLAME_UP) {
        if (0xFF - flameI2Cpwm >= flameSpeedUp ) {
            flameI2Cpwm += flameSpeedUp;
        } else {        
            flameI2Cpwm = 0xFF;
        }
        push_queue(&setFlamePWM);
        if (flameI2Cpwm >= flameBrightnessMax) {
            flameMode = FLAME_UP_WAIT;
            flameTicks = 0;
        }
    }

    if (flameMode == FLAME_UP_WAIT) {
        if (flameTicks >= flameWaitUp) {
            flameMode = FLAME_DOWN;
        }
    }

    if (flameMode == FLAME_DOWN) {
        if (flameSpeedDown <= flameI2Cpwm) {
            flameI2Cpwm -= flameSpeedDown;
        } else {
            flameI2Cpwm = 0x00;
        }
        push_queue(&setFlamePWM);
        if (flameI2Cpwm <= flameBrightnessMin) {
            flameMode = FLAME_DOWN_WAIT;
            flameTicks = 0;
        }
    }

    if (flameMode == FLAME_DOWN_WAIT) {
        if (flameTicks >= flameWaitDown) {
            flameMode = FLAME_OFF;
        }
    }
}

void init_flame(void) {
    i2cInit(I2CMASTER); // Init I2C

    flameEnabled = (flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_OFF << FLAME_I2C_LS0_LED0) == I2CSTATE_ACK); // probe i2c

    if (!flameEnabled)
        return;

    flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_OFF << FLAME_I2C_LS0_LED0); // set led0 off
    flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_OFF << FLAME_I2C_LS0_LED1); // set led1 off
    flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_OFF << FLAME_I2C_LS0_LED2); // set led2 off
    flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_OFF << FLAME_I2C_LS0_LED3); // set led3 off

    flameSetI2C(FLAME_I2C_CR_PSC0, 0x00); // set prescaler
    flameSetI2C(FLAME_I2C_CR_PWM0, 0x00); // set pwm
    flameSetI2C(FLAME_I2C_CR_LS0, FLAME_I2C_LS0_PWM0 << FLAME_I2C_LS0_LED0); // set led0 to pwm

    enableConfig(CFG_TYPE_FLAME,1);
}

#include "lcd/print.h"

// //# MENU flame
void ChkFlame(void) {
    do{
        lcdClear();
        lcdPrint("Enabled:");
        lcdPrintln(IntToStr(flameEnabled,1,0));

        lcdPrint("State:");
        lcdPrintln(IntToStr(flameMode,1,0));

        lcdPrint("PWMtarg:");
        lcdPrintln(IntToStr(flameI2Cpwm,3,0));

        lcdPrint("FTicks:");
        lcdPrintln(IntToStr(flameTicks,3,0));

        lcdRefresh();
        delayms_queue(10);
    } while ((getInputRaw())==BTN_NONE);
}