/*
 * Copyright (c) Camden Dixie O'Brien
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#ifndef ROTAGEN_H
#define ROTAGEN_H

#include <stdbool.h>

#define MAX_PEOPLE 32
#define MAX_JOBS 32
#define MAX_SLOTS 32
#define MAX_CONSTRAINTS 32

#define MAX_STRING_LEN 32

enum constraint_type {
	JOB_EXEMPTION_CONSTRAINT,
	SLOT_EXEMPTION_CONSTRAINT,
};

struct constraint {
	int person;
	enum constraint_type type;
	union {
		int job; /* Job constraints */
		int slot; /* Slot constraints */
	} object;
};

struct assignment {
	int person;
	int job;
	int slot;
};

struct slot_result {
	struct assignment assignments[MAX_JOBS];
};

typedef char string[MAX_STRING_LEN];

struct config {
	string people[MAX_PEOPLE];
	int num_people;
	string jobs[MAX_JOBS];
	int num_jobs;
	string slots[MAX_SLOTS];
	int num_slots;
	struct constraint constraints[MAX_CONSTRAINTS];
	int num_constraints;
};

void generate_rota(struct slot_result *rota_out);
void generate_assignment(int slot, int job, struct assignment *assignment_out);
bool satisfies_assignment_constraints(const struct assignment *assignment);
bool previously_allocated(int previous_assignments[MAX_JOBS], int person);
bool satisfies_slot_constraints(const struct slot_result *slot);
void print_rota(const struct slot_result *rota);
void read_config(const char *path, struct config *config_out);

#endif