class_name NPC
extends Character


enum npcDifficulties { MINION, NORMAL, MINIBOSS, BOSS, ELITEBOSS, BBEG }
enum npcTiers { I, II, III, IV, V, VI, VII, VIII, IX, X }

@export var npcDifficulty: npcDifficulties
@export var npcTier: npcTiers

func _random_mod_health() -> void:
    randomize()
    # noise factor
    var noise_factor = randf_range(7, 10)
    self.maxHealth *= noise_factor
    # difficulty factor
    match self.npcDifficulty:
        npcDifficulties.MINION:
            self.maxHealth /= 2
        npcDifficulties.MINIBOSS:
            self.maxHealth *= 2
        npcDifficulties.BOSS:
            self.maxHealth *= 4
        npcDifficulties.ELITEBOSS:
            self.maxHealth *= 8
        npcDifficulties.BBEG:
            self.maxHealth *= 16
    # npcTier factor
    self.maxHealth *= exp(self.npcTier)
    
    # fun factor (just additional factor to tweak)
    self.maxHealth *= 10


func _init(npcDifficulty: npcDifficulties = npcDifficulties.NORMAL,
            npcTier: npcTiers = npcTiers.I) -> void:
    self.npcDifficulty = npcDifficulty
    self.npcTier = npcTier
    _random_mod_health()