printf :: c_func(format *c_char, ...) c_int

PlayerID :: distinct u32

Tier :: enum(u8) {
	bronze = 1
	silver
	gold
}

Player :: struct {
	id PlayerID
	name *c_char
	tier Tier
	score i32
	streak i32
	active bool
}

tier_bonus :: func(tier Tier) i32 {
	if tier == .gold {
		return 30
	} else if tier == .silver {
		return 15
	}
	return 5
}

projected_score :: func(player Player) i32 {
	total i32 = player.score
	total += tier_bonus(player.tier)
	if player.active and player.streak > 2 {
		total += player.streak * 3
	}
	return total
}

apply_decay :: func(players []mut Player) void {
	for players |@player| {
		if !player.active {
			player.score -= 4
		}
	}
}

best_player :: func(players []mut Player) ?@mut Player {
	best ?@mut Player = none
	best_score i32 = 0

	for players |@player| {
		score :: projected_score(player^)
		if best |_| {
			if score > best_score {
				best = player
				best_score = score
			}
		} else {
			best = player
			best_score = score
		}
	}

	return best
}

main :: func() i32 {
	players [4]mut Player = [
		Player { id = PlayerID(1), name = "Ada", tier = .gold, score = 41, streak = 4, active = true },
		Player { id = PlayerID(2), name = "Ken", tier = .silver, score = 56, streak = 1, active = true },
		Player { id = PlayerID(3), name = "Edsger", tier = .bronze, score = 64, streak = 0, active = false },
		Player { id = PlayerID(4), name = "Grace", tier = .gold, score = 33, streak = 5, active = true },
	]

	apply_decay((&players)[..])

	for (&players) |@player, index| {
		score :: projected_score(player^)
		_ = printf("%d: %s projected=%d\n", index, player.name, score)
	}

	if best_player((&players)[..]) |winner : projected_score(winner^) >= 80| {
		_ = printf("winner: %s\n", winner.name)
		return 0
	}

	return 1
}