#pragma once

#include <stdbool.h>
#include <stddef.h>

#include "maths/matrix.h"
#include "maths/vector.h"

enum PsiGateType
{
	PSI_GATE_TYPE_DIAGONAL,
	PSI_GATE_TYPE_NON_DIAGONAL,
	PSI_GATE_TYPE_CONTROLLED,
};

struct PsiKernel
{
	struct PsiMatrix matrix;
	size_t *targets;
	size_t target_count;
	char *name;
	enum PsiGateType gate_type;
};

struct PsiKernel psi_new_kernel(const char *name, struct PsiMatrix matrix, const size_t *targets, size_t target_count);
struct PsiKernel psi_clone_kernel(struct PsiKernel kernel);
void psi_free_kernel(struct PsiKernel *kernel);

bool psi_kernels_share_qubits(struct PsiKernel a, struct PsiKernel b);
bool psi_kernels_commute(struct PsiKernel a, struct PsiKernel b);
bool psi_kernels_can_fuse(struct PsiKernel a, struct PsiKernel b);
bool psi_fuse_kernels(struct PsiKernel a, struct PsiKernel b, struct PsiKernel *out);

struct PsiKernelBatch
{
	struct PsiKernel *kernels;
	size_t count;
	size_t capacity;
	size_t num_qubits;
};

struct PsiKernelBatch psi_new_kernel_batch(size_t num_qubits);
void psi_free_kernel_batch(struct PsiKernelBatch *batch);
void psi_add_kernel(struct PsiKernelBatch *batch, struct PsiKernel kernel);
void psi_optimize_kernel_batch(struct PsiKernelBatch *batch);
void psi_execute_kernel_batch(struct PsiKernelBatch batch, struct PsiVector *state);

struct PsiExecutionLayer
{
	struct PsiKernel *kernels;
	size_t count;
	size_t capacity;
};

struct PsiKernelStats
{
	size_t total_kernels;
	size_t single_qubit;
	size_t two_qubit;
	size_t multi_qubit;
	size_t diagonal;
	size_t execution_layers;
};

struct PsiStructureAwareBatch
{
	struct PsiKernel *kernels;
	size_t count;
	size_t capacity;
	struct PsiExecutionLayer *layers;
	size_t layer_count;
	size_t layer_capacity;
	size_t num_qubits;
	bool optimised;
};

struct PsiStructureAwareBatch psi_new_structure_aware_batch(size_t num_qubits);
void psi_free_structure_aware_batch(struct PsiStructureAwareBatch *batch);
void psi_add_structure_aware_kernel(struct PsiStructureAwareBatch *batch, struct PsiKernel kernel);
void psi_optimize_structure_aware_batch(struct PsiStructureAwareBatch *batch);
void psi_execute_structure_aware_batch(struct PsiStructureAwareBatch batch, struct PsiVector *state);
void psi_execute_structure_aware_batch_layered(struct PsiStructureAwareBatch batch, struct PsiVector *state);
struct PsiKernelStats psi_structure_aware_batch_stats(struct PsiStructureAwareBatch batch);