#if !defined(_DECISION_H_)

#define _DECISION_H_ 1

#include "xce/types.h"
#include <stdint.h>

typedef enum {
    XCE_DECISION_NONE = 0,
    XCE_DECISION_DISPATCH,
    XCE_DECISION_PEND,
    XCE_DECISION_NEW_SESSION,
    XCE_DECISION_PREEMPT
} xce_decision_op_t;

/*
 * xce_preempt_victim_t / xce_preempt_t - PREEMPT decision payload
 * (scheduler-core spec, task 4.4, Req 5 AC 6). Scheduler-owned (not
 * xce/types.h): design.md's Boundary Commitments note that the PREEMPT
 * wire shape is owned by this spec while victim-*selection* semantics
 * belong to the (separate, not-yet-implemented) scheduler-preemption spec
 * -- so these two structs carry exactly AC 6's field list ("jobid,
 * victims[] (jobid, workerid per victim), reason") and nothing more.
 *
 * `victims` follows the same "int count; T** items" idiom as
 * xce_job_dispatch_t.allocs / xce_preason_set_t.reasons (xce/types.h) --
 * an array of pointers, not a flat array, for consistency with every other
 * decision-adjacent list in this codebase.
 */
typedef struct {
    uint64_t jobid;
    char*    workerid;
} xce_preempt_victim_t;

typedef struct {
    uint64_t               jobid;
    int                    nvictims;
    xce_preempt_victim_t** victims;
    xce_pendreason_t*      reason;
} xce_preempt_t;

typedef struct {
    xce_decision_op_t op;
    union {
        xce_job_alloc_t*  alloc;
        xce_pendreason_t* reason;
        xce_preempt_t*    preempt;
    } u;
} xce_decision_t;

extern xce_decision_t* make_pend_decision(xce_pendreason_t*);
extern xce_decision_t* make_dispatch_decision(xce_job_alloc_t*);
extern xce_decision_t* make_preempt_decision(xce_preempt_t*);

#endif