/*
   There are a total of 3 entries in the algebraic variable array.
   There are a total of 3 entries in each of the rate and state variable arrays.
   There are a total of 28 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (day).
 * STATES[0] is R in component R (picomolar).
 * ALGEBRAIC[0] is f in component R (flux).
 * CONSTANTS[0] is DR in component model_parameters (flux).
 * ALGEBRAIC[2] is pi_C in component model_parameters (dimensionless).
 * CONSTANTS[23] is DB in component model_parameters (first_order_rate_constant).
 * STATES[1] is B in component B (picomolar).
 * CONSTANTS[1] is kB in component model_parameters (first_order_rate_constant).
 * STATES[2] is C in component C (picomolar).
 * CONSTANTS[2] is DC in component model_parameters (flux).
 * ALGEBRAIC[1] is pi_L in component pi_L (dimensionless).
 * CONSTANTS[3] is DA in component model_parameters (first_order_rate_constant).
 * CONSTANTS[4] is k1 in component pi_L (second_order_rate_constant).
 * CONSTANTS[5] is k2 in component pi_L (first_order_rate_constant).
 * CONSTANTS[6] is k3 in component pi_L (second_order_rate_constant).
 * CONSTANTS[7] is k4 in component pi_L (first_order_rate_constant).
 * CONSTANTS[8] is K in component pi_L (picomolar).
 * CONSTANTS[9] is ko in component pi_L (first_order_rate_constant).
 * CONSTANTS[10] is Io in component pi_L (flux).
 * CONSTANTS[11] is IL in component pi_L (flux).
 * CONSTANTS[12] is rL in component pi_L (flux).
 * CONSTANTS[13] is KOP in component pi_L (picomole_day_picomole_cells).
 * CONSTANTS[14] is KLP in component pi_L (picomole_picomole_cells).
 * CONSTANTS[27] is pi_P in component model_parameters (dimensionless).
 * CONSTANTS[15] is f0 in component model_parameters (dimensionless).
 * CONSTANTS[16] is dB in component model_parameters (first_order_rate_constant).
 * CONSTANTS[17] is IP in component model_parameters (flux).
 * CONSTANTS[18] is kP in component model_parameters (first_order_rate_constant).
 * CONSTANTS[24] is P in component model_parameters (picomolar).
 * CONSTANTS[25] is P_0 in component model_parameters (picomolar).
 * CONSTANTS[26] is P_s in component model_parameters (picomolar).
 * CONSTANTS[19] is C_s in component model_parameters (picomolar).
 * CONSTANTS[20] is SP in component model_parameters (flux).
 * CONSTANTS[21] is k5 in component model_parameters (second_order_rate_constant).
 * CONSTANTS[22] is k6 in component model_parameters (first_order_rate_constant).
 * RATES[0] is d/dt R in component R (picomolar).
 * RATES[1] is d/dt B in component B (picomolar).
 * RATES[2] is d/dt C in component C (picomolar).
 * There are a total of 2 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 0.00077;
CONSTANTS[0] = 7e-4;
STATES[1] = 0.00073;
CONSTANTS[1] = 0.189;
STATES[2] = 0.00091;
CONSTANTS[2] = 2.1e-3;
CONSTANTS[3] = 0.7;
CONSTANTS[4] = 1e-2;
CONSTANTS[5] = 10;
CONSTANTS[6] = 5.8e-4;
CONSTANTS[7] = 1.7e-2;
CONSTANTS[8] = 10;
CONSTANTS[9] = 0.35;
CONSTANTS[10] = 0;
CONSTANTS[11] = 0;
CONSTANTS[12] = 1e3;
CONSTANTS[13] = 2e5;
CONSTANTS[14] = 3e6;
CONSTANTS[15] = 0.05;
CONSTANTS[16] = 0.7;
CONSTANTS[17] = 0;
CONSTANTS[18] = 86;
CONSTANTS[19] = 5e-3;
CONSTANTS[20] = 250;
CONSTANTS[21] = 0.02;
CONSTANTS[22] = 3;
CONSTANTS[23] =  CONSTANTS[15]*CONSTANTS[16];
CONSTANTS[24] = CONSTANTS[17]/CONSTANTS[18];
CONSTANTS[25] = CONSTANTS[20]/CONSTANTS[18];
CONSTANTS[26] = CONSTANTS[22]/CONSTANTS[21];
CONSTANTS[27] = (CONSTANTS[24]+CONSTANTS[25])/(CONSTANTS[24]+CONSTANTS[26]);
RATES[0] = 0.1001;
RATES[1] = 0.1001;
RATES[2] = 0.1001;
}
void
computeResiduals(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
                 double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
resid[0] = RATES[0] - ( CONSTANTS[0]*ALGEBRAIC[2] -  (CONSTANTS[23]/ALGEBRAIC[2])*STATES[0])+ALGEBRAIC[0];
resid[1] = RATES[1] -  (CONSTANTS[23]/ALGEBRAIC[2])*STATES[0] -  CONSTANTS[1]*STATES[1];
resid[2] = RATES[2] -  CONSTANTS[2]*ALGEBRAIC[1] -  CONSTANTS[3]*ALGEBRAIC[2]*STATES[2];
}
void
computeVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
}
void
computeEssentialVariables(double VOI, double* CONSTANTS, double* RATES, double* STATES, double* ALGEBRAIC)
{
ALGEBRAIC[0] = (CONDVAR[0]>0.00000&&CONDVAR[1]<=0.00000 ? - 0.000120000 : 0.00000);
ALGEBRAIC[1] =  (( (( (CONSTANTS[6]/CONSTANTS[7])*CONSTANTS[14])/1.00000)*CONSTANTS[27]*STATES[1])/(1.00000+( CONSTANTS[6]*CONSTANTS[8])/CONSTANTS[7]+ (CONSTANTS[4]/( CONSTANTS[5]*CONSTANTS[9]))*( ((CONSTANTS[13]/1.00000)/CONSTANTS[27])*STATES[0]+CONSTANTS[10])))*(1.00000+CONSTANTS[11]/CONSTANTS[12]);
ALGEBRAIC[2] = (STATES[2]+ CONSTANTS[15]*CONSTANTS[19])/(STATES[2]+CONSTANTS[19]);
}
void
getStateInformation(double* SI)
{
SI[0] = 1.0;
SI[1] = 1.0;
SI[2] = 1.0;
}
void
computeRoots(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
             double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
CONDVAR[0] = VOI - 20.0000;
CONDVAR[1] = VOI - 80.0000;
}