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#ifndef AO_SHELL_API_H
#define AO_SHELL_API_H

#include <stddef.h>
#include <stdint.h>

#include "../macros.h"
#include "../types/cuest_types.h"
#include "../types/cuest_parameter_types.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief Create an AO shell object with specified parameters.
 * @ingroup Basis
 *
 * @param[in]  handle          cuEST handle. Must not be NULL.
 * @param[in]  isPure          Whether the shell uses pure (spherical) functions (any nonzero value is interpreted as true).
 * @param[in]  L               Angular momentum quantum number (s=0, p=1, d=2, etc).
 * @param[in]  numPrimitive    Number of Gaussian primitives; must be greater than zero.
 * @param[in]  exponents       Pointer containing primitive exponents (size: \c numPrimitive) on the CPU. Must not be NULL.
 * @param[in]  coefficients    Pointer containing contraction coefficients (size: \c numPrimitive) on the CPU. Must not be NULL.
 * @param[in]  parameters      Handle to \c cuestAOShellParameters_t. Must not be NULL.
 * @param[out] outShell        Pointer to output shell object; receives opaque handle on success. Must not be NULL.
 *
 * The contraction \c coefficients passed to this function will be used verbatim. It is the user's responsibility
 * to normalize the shells as desired. For more information see: \verbatim embed:rst
 :ref:`cuest_primitive_normalization`
 \endverbatim
 *
 * @return
 *   - \c CUEST_STATUS_SUCCESS on success;
 *   - \c CUEST_STATUS_INVALID_HANDLE if the cuEST handle is NULL;
 *   - \c CUEST_STATUS_NULL_POINTER if any required pointer is NULL;
 *   - \c CUEST_STATUS_INVALID_TYPE if the cuEST handle or parameters are not of the correct type;
 *   - \c CUEST_STATUS_INVALID_ARGUMENT if \c numPrimitive is zero;
 *   - \c CUEST_STATUS_EXCEPTION for unexpected error;
 *   - \c CUEST_STATUS_UNKNOWN_ERROR for non-std exceptions.
 */
CUEST_API
cuestStatus_t cuestAOShellCreate(
    cuestHandle_t handle,
    int32_t isPure,
    uint64_t L,
    uint64_t numPrimitive,
    const double* exponents,
    const double* coefficients,
    const cuestAOShellParameters_t parameters, 
    cuestAOShell_t* outShell);

/**
 * @brief Destroy/free an AO shell object created with \c cuestAOShellCreate.
 * @ingroup Basis
 *
 * Frees all memory associated with the AO shell. After destruction, the shell handle must not be used.
 *
 * @param[in] shell   Opaque AO shell handle to destroy. Must not be NULL.
 *
 * @return
 *   - \c CUEST_STATUS_SUCCESS on success;
 *   - \c CUEST_STATUS_NULL_POINTER if \c shell is NULL;
 *   - \c CUEST_STATUS_INVALID_TYPE if the \c shell handle is not of the \c cuestAOShell_t type;
 *   - \c CUEST_STATUS_EXCEPTION or \c CUEST_STATUS_UNKNOWN_ERROR on error.
 */
CUEST_API
cuestStatus_t cuestAOShellDestroy(
    cuestAOShell_t shell);

#ifdef __cplusplus
}
#endif

#endif /* AO_SHELL_API_H */
