/*
   There are a total of 1 entries in the algebraic variable array.
   There are a total of 2 entries in each of the rate and state variable arrays.
   There are a total of 11 entries in the constant variable array.
 */
/*
 * VOI is time in component environment (minute).
 * STATES[0] is H1 in component H1 (picomolar).
 * ALGEBRAIC[0] is A in component A (flux).
 * CONSTANTS[7] is beta_I in component model_parameters (first_order_rate_constant).
 * STATES[1] is H2 in component H2 (picomolar).
 * CONSTANTS[8] is beta_C in component model_parameters (first_order_rate_constant).
 * CONSTANTS[0] is t_on in component A (minute).
 * CONSTANTS[1] is t_off in component A (minute).
 * CONSTANTS[2] is A_max in component A (flux).
 * CONSTANTS[9] is alpha in component model_parameters (first_order_rate_constant).
 * CONSTANTS[10] is lamda in component model_parameters (first_order_rate_constant).
 * CONSTANTS[3] is tau_I in component model_parameters (minute).
 * CONSTANTS[4] is tau_C in component model_parameters (minute).
 * CONSTANTS[5] is tau_alpha in component model_parameters (minute).
 * CONSTANTS[6] is tau_lamda in component model_parameters (minute).
 * RATES[0] is d/dt H1 in component H1 (picomolar).
 * RATES[1] is d/dt H2 in component H2 (picomolar).
 * There are a total of 3 condition variables.
 */
void
initConsts(double* CONSTANTS, double* RATES, double *STATES)
{
STATES[0] = 0.05;
STATES[1] = 1.0;
CONSTANTS[0] = 1316.0;
CONSTANTS[1] = 1792.0;
CONSTANTS[2] = 6.51;
CONSTANTS[3] = 2.82;
CONSTANTS[4] = 23.67;
CONSTANTS[5] = 25.92;
CONSTANTS[6] = 24.04;
CONSTANTS[7] = log(2.00000)/CONSTANTS[3];
CONSTANTS[8] = log(2.00000)/CONSTANTS[4];
CONSTANTS[9] = log(2.00000)/CONSTANTS[5];
CONSTANTS[10] = log(2.00000)/CONSTANTS[6];
RATES[0] = 0.1001;
RATES[1] = 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[7]*STATES[0])+ALGEBRAIC[0];
resid[1] = RATES[1] -  CONSTANTS[7]*STATES[0] -  CONSTANTS[8]*STATES[1];
}
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 ?  CONSTANTS[2]*((1.00000 - exp( - CONSTANTS[10]*(VOI - CONSTANTS[0])))/(1.00000 - exp( - CONSTANTS[10]*(CONSTANTS[1] - CONSTANTS[0])))) : CONDVAR[2]>=0.00000 ?  CONSTANTS[2]*exp( - CONSTANTS[9]*(VOI - CONSTANTS[1])) : 0.00000);
}
void
getStateInformation(double* SI)
{
SI[0] = 1.0;
SI[1] = 1.0;
}
void
computeRoots(double VOI, double* CONSTANTS, double* RATES, double* OLDRATES, double* STATES,
             double* OLDSTATES, double* ALGEBRAIC, double* CONDVARS)
{
CONDVAR[0] = VOI - CONSTANTS[1];
CONDVAR[1] = VOI - CONSTANTS[0];
CONDVAR[2] = VOI - CONSTANTS[1];
}