#ifndef TASK01_EVENT_GROUPS_MODEL_H
#define TASK01_EVENT_GROUPS_MODEL_H

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

typedef struct EventGroupEvidence
{
    uint32_t sequence;
    uint32_t event;
    uint32_t tick;
    uint32_t actor;
    uint32_t value;
    uint32_t committed;
} EventGroupEvidence;

static inline uint32_t fc09_digest( const EventGroupEvidence * events,
                                    size_t count )
{
    uint32_t hash = 2166136261U;
    size_t index;

    for( index = 0U; index < count; ++index )
    {
        hash = ( hash ^ events[ index ].event ) * 16777619U;
        hash = ( hash ^ events[ index ].actor ) * 16777619U;
        hash = ( hash ^ events[ index ].value ) * 16777619U;
        hash = ( hash ^ events[ index ].committed ) * 16777619U;
    }
    return hash;
}

static inline int fc09_mask_contains( uint32_t value, uint32_t mask )
{
    return ( value & mask ) == mask;
}

static inline int fc09_order_is_valid( const EventGroupEvidence * events,
                                       size_t count )
{
    size_t index;

    if( events == NULL || count != 11U )
    {
        return 0;
    }
    for( index = 0U; index < count; ++index )
    {
        if( events[ index ].sequence != index + 1U ||
            events[ index ].event != index + 1U ||
            events[ index ].committed != ( 0xFC090000U | ( index + 1U ) ) )
        {
            return 0;
        }
    }
    return 1;
}

#endif