/*
 *  File:       mon-util.h
 *  Summary:    Misc monster related functions.
 *  Written by: Linley Henzell
 */


#ifndef MONUTIL_H
#define MONUTIL_H

#include "externs.h"
#include "enum.h"
#include "player.h"
#include "monster.h"

enum corpse_effect_type
{
    CE_NOCORPSE,        //    0
    CE_CLEAN,           //    1
    CE_CONTAMINATED,    //    2
    CE_POISONOUS,       //    3
    CE_HCL,             //    4
    CE_MUTAGEN_RANDOM,  //    5
    CE_MUTAGEN_GOOD,    //    6 - may be worth implementing {dlb}
    CE_MUTAGEN_BAD,     //    7 - may be worth implementing {dlb}
    CE_RANDOM,          //    8 - not used, but may be worth implementing {dlb}
    CE_ROTTEN = 50      //   50 - must remain at 50 for now {dlb}
};

enum gender_type
{
    GENDER_NEUTER,
    GENDER_MALE,
    GENDER_FEMALE
};

enum mon_attack_type
{
    AT_NONE,
    AT_HIT,         // Including weapon attacks.
    AT_BITE,
    AT_STING,
    AT_SPORE,
    AT_TOUCH,
    AT_ENGULF,
    AT_CLAW,
    AT_PECK,
    AT_HEADBUTT,
    AT_PUNCH,
    AT_KICK,
    AT_TENTACLE_SLAP,
    AT_TAIL_SLAP,
    AT_GORE,
    AT_CONSTRICT,

    AT_SHOOT,       // Attack representing missile damage for M_ARCHER.
    AT_WEAP_ONLY,   // Ranged weap: shoot point-blank like AT_SHOOT, melee weap:
                    //   use it, no weapon: stand there doing nothing.
    AT_RANDOM       // Anything but AT_SHOOT and AT_WEAP_ONLY.
};

enum mon_attack_flavour
{
    AF_PLAIN,
    AF_ACID,
    AF_BLINK,
    AF_COLD,
    AF_CONFUSE,
    AF_DISEASE,
    AF_DRAIN_DEX,
    AF_DRAIN_STR,
    AF_DRAIN_XP,
    AF_ELEC,
    AF_FIRE,
    AF_HUNGER,
    AF_MUTATE,
    AF_PARALYSE,
    AF_POISON,
    AF_POISON_NASTY,
    AF_POISON_MEDIUM,
    AF_POISON_STRONG,
    AF_POISON_STR,
    AF_ROT,
    AF_VAMPIRIC,
    AF_KLOWN,
    AF_DISTORT,
    AF_RAGE,
    AF_NAPALM,
    AF_CHAOS,
    AF_STEAL,
    AF_STEAL_FOOD,
    AF_CRUSH,
    AF_REACH
};

// Non-spell "summoning" types to give to monsters::mark_summoned(), or
// as the fourth parameter of mgen_data's constructor.
//
// Negative values since spells are non-negative.
enum mon_summon_type
{
    MON_SUMM_CLONE = -10000, // Cloned from another monster
    MON_SUMM_ANIMATE, // Item/feature/substance which was animated
    MON_SUMM_CHAOS,   // Was made from pure chaos
    MON_SUMM_MISCAST, // Spell miscast
    MON_SUMM_ZOT,     // Zot trap
    MON_SUMM_WRATH,   // Divine wrath
    MON_SUMM_AID      // Divine aid
};

// properties of the monster class (other than resists/vulnerabilities)
enum mons_class_flags
{
    M_NO_FLAGS          = 0,

    M_SPELLCASTER       = (1<< 0),        // any non-physical-attack powers,
    M_ACTUAL_SPELLS     = (1<< 1),        // monster is a wizard,
    M_PRIEST            = (1<< 2),        // monster is a priest,
    M_FIGHTER           = (1<< 3),        // monster is skilled fighter

    M_NO_WAND           = (1<< 4),        // do not give (unique) a wand
    M_NO_HT_WAND        = (1<< 5),        // do not give a high tier wand

    M_INVIS             = (1<< 6),        // is created invis
    M_SEE_INVIS         = (1<< 7),        // can see invis
    M_SENSE_INVIS       = (1<< 8),        // can sense invisible things
    M_SPEAKS            = (1<< 9),        // uses talking code
    M_CONFUSED          = (1<<10),        // monster is perma-confused,
    M_BATTY             = (1<<11),        // monster is batty
    M_SPLITS            = (1<<12),        // monster can split
    M_GLOWS             = (1<<13),        // monster glows
    M_STATIONARY        = (1<<14),        // monster is stationary
    M_BLOOD_SCENT       = (1<<15),        // monster can smell blood
    M_COLD_BLOOD        = (1<<16),        // susceptible to cold,
                                          // drainable by vampires
    M_WARM_BLOOD        = (1<<17),        // no effect currently,
                                          // drainable by vampires
    M_REGEN             = (1<<18),        // regenerates quickly
    M_BURROWS           = (1<<19),        // monster digs through rock

    // XXX: unused        (1<<20),

    M_UNIQUE            = (1<<21),        // monster is a unique
    M_ACID_SPLASH       = (1<<22),        // Passive acid splash when hit.

    M_ARCHER            = (1<<23),        // gets various archery boosts

    M_INSUBSTANTIAL     = (1<<24),        // is insubstantial

    M_TWOWEAPON         = (1<<25),        // wields two weapons at once

    M_SPECIAL_ABILITY   = (1<<26),        // XXX: eventually make these spells?
    M_NO_REGEN          = (1<<27),        // cannot regenerate

    M_SPELL_NO_SILENT   = (1<<28),        // cannot cast spells when silenced,
                                          // even though it's not a priest or
                                          // wizard

    M_NOISY_SPELLS      = (1<<29),        // can cast spells when silenced, but
                                          // casting makes noise when not
                                          // silenced

    M_NO_SKELETON       = (1<<30),        // boneless corpses
    M_NO_EXP_GAIN       = (1<<31)         // worth 0 xp
};

enum mon_intel_type             // Must be in increasing intelligence order
{
    I_PLANT = 0,
    I_INSECT,
    I_ANIMAL,
    I_NORMAL,
    I_HIGH
};

enum habitat_type
{
    // Flying monsters will appear in all categories except rock walls
    HT_LAND = 0,         // Land critters
    HT_AMPHIBIOUS_LAND,  // Amphibious land-preferring critters
    HT_AMPHIBIOUS_WATER, // Amphibious water-preferring critters
    HT_WATER,            // Water critters
    HT_LAVA,             // Lava critters
    HT_ROCK,             // Rock critters

    NUM_HABITATS
};

// order of these is important:
enum mon_itemuse_type
{
    MONUSE_NOTHING,
    MONUSE_OPEN_DOORS,
    MONUSE_STARTING_EQUIPMENT,
    MONUSE_WEAPONS_ARMOUR,
    MONUSE_MAGIC_ITEMS,

    NUM_MONUSE
};

enum mon_itemeat_type
{
    MONEAT_NOTHING,
    MONEAT_ITEMS,
    MONEAT_CORPSES,
    MONEAT_FOOD,

    NUM_MONEAT
};

// now saved in an unsigned long.
enum mon_resist_flags
{
    MR_NO_FLAGS          = 0,

    // resistances
    // Notes:
    // - negative energy is mostly handled via monsters::res_negative_energy()
    MR_RES_ELEC          = (1<< 0),
    MR_RES_POISON        = (1<< 1),
    MR_RES_FIRE          = (1<< 2),
    MR_RES_HELLFIRE      = (1<< 3),
    MR_RES_COLD          = (1<< 4),
    MR_RES_ASPHYX        = (1<< 5),
    MR_RES_ACID          = (1<< 6),

    // vulnerabilities
    MR_VUL_ELEC          = (1<< 7),
    MR_VUL_POISON        = (1<< 8),
    MR_VUL_FIRE          = (1<< 9),
    MR_VUL_COLD          = (1<<10),

    // Melee armour resists/vulnerabilities.
    // XXX: how to do combos (bludgeon/slice, bludgeon/pierce)
    MR_RES_PIERCE        = (1<<11),
    MR_RES_SLICE         = (1<<12),
    MR_RES_BLUDGEON      = (1<<13),

    MR_VUL_PIERCE        = (1<<14),
    MR_VUL_SLICE         = (1<<15),
    MR_VUL_BLUDGEON      = (1<<16),

    // Immune to stickiness of sticky flame.
    MR_RES_STICKY_FLAME  = (1<<17),

    // Immune to rotting.
    MR_RES_ROTTING       = (1<<18),

    MR_RES_STEAM         = (1<<19)
};

enum shout_type
{
    S_SILENT,               // silent
    S_SHOUT,                // shout
    S_BARK,                 // bark
    S_SHOUT2,               // shout twice (e.g. two-headed ogres)
    S_ROAR,                 // roar
    S_SCREAM,               // scream
    S_BELLOW,               // bellow (yaks)
    S_SCREECH,              // screech
    S_BUZZ,                 // buzz
    S_MOAN,                 // moan
    S_GURGLE,               // gurgle
    S_WHINE,                // irritating whine (mosquitos)
    S_CROAK,                // frog croak
    S_GROWL,                // for bears
    S_HISS,                 // for snakes and lizards
    S_DEMON_TAUNT,          // for pandemonium lords
    NUM_SHOUTS,

    // Loudness setting for shouts that are only defined in dat/shout.txt
    S_VERY_SOFT,
    S_SOFT,
    S_NORMAL,
    S_LOUD,
    S_VERY_LOUD,

    NUM_LOUDNESS,
    S_RANDOM
};

enum zombie_size_type
{
    Z_NOZOMBIE = 0,
    Z_SMALL,
    Z_BIG
};

struct bolt;

// ($pellbinder) (c) D.G.S.E. 1998

struct mon_attack_def
{
    mon_attack_type     type;
    mon_attack_flavour  flavour;
    int                 damage;

    static mon_attack_def attk(int damage,
                               mon_attack_type type = AT_HIT,
                               mon_attack_flavour flav = AF_PLAIN)
    {
        mon_attack_def def = { type, flav, damage };
        return (def);
    }
};

// Amount of monster->speed_increment used by different actions; defaults
// to 10.
struct mon_energy_usage
{
public:
    char move;
    char swim;
    char attack;
    char missile; // Arrows/crossbows/etc
    char spell;
    char special;
    char item;    // Using an item (i.e., drinking a potion)

    // Percent of monster->speed used when picking up an item; defaults
    // to 100%
    char pickup_percent;

public:
    mon_energy_usage(int mv = 10, int sw = 10, int att = 10, int miss = 10,
                     int spl = 10, int spc = 10, int itm = 10, int pick = 100)
        : move(mv), swim(sw), attack(att), missile(miss),
          spell(spl), special(spc), item(itm), pickup_percent(pick)
    {
    }

    static mon_energy_usage attack_cost(int cost)
    {
        mon_energy_usage me;
        me.attack = cost;
        return me;
    }

    static mon_energy_usage missile_cost(int cost)
    {
        mon_energy_usage me;
        me.missile = cost;
        return me;
    }

    static mon_energy_usage move_cost(int mv, int sw = 10)
    {
        const mon_energy_usage me(mv, sw);
        return me;
    }

    mon_energy_usage operator | (const mon_energy_usage &o) const
    {
        return mon_energy_usage( combine(move, o.move),
                                 combine(swim, o.swim),
                                 combine(attack, o.attack),
                                 combine(missile, o.missile),
                                 combine(spell, o.spell),
                                 combine(special, o.special),
                                 combine(item, o.item),
                                 combine(pickup_percent, o.pickup_percent,
                                         100) );
    }
private:
    char combine(char a, char b, char def = 10) const {
        return (b != def? b : a);
    }
};

struct mon_resist_def
{
    // All values are actually saved as single-bytes, so practical
    // range is -128 - 127, and the game only distinguishes values in
    // the range -1 to 3.

    short elec;
    short poison;
    short fire;
    short steam;
    short cold;
    short hellfire;
    short acid;

    bool asphyx;
    bool sticky_flame;
    bool rotting;

    // Physical damage resists (currently unused)
    short pierce;
    short slice;
    short bludgeon;

    mon_resist_def();
    mon_resist_def(int flags, short level = -100);

    mon_resist_def operator | (const mon_resist_def &other) const;
    const mon_resist_def &operator |= (const mon_resist_def &other);

    short get_resist_level(mon_resist_flags res_type) const;

private:
    short get_default_res_level(int resist, short level) const;
};

inline mon_resist_def operator | (int a, const mon_resist_def &b)
{
    return (mon_resist_def(a) | b);
}

typedef mon_resist_def mrd;

struct monsterentry
{
    short mc;            // monster number

    unsigned char showchar, colour;
    const char *name;

    unsigned long bitfields;
    mon_resist_def resists;

    short weight;
    // [Obsolete] Experience used to be calculated like this:
    // ((((max_hp / 7) + 1) * (mHD * mHD) + 1) * exp_mod) / 10
    //     ^^^^^^ see below at hpdice
    //   Note that this may make draining attacks less attractive (LRH)
    char exp_mod;

    monster_type genus,         // "team" the monster plays for
                 species;       // corpse type of the monster

    mon_holy_type holiness;

    short resist_magic;  // (positive is ??)
    // max damage in a turn is total of these four?

    mon_attack_def attack[4];

    // hpdice[4]: [0]=HD [1]=min_hp [2]=rand_hp [3]=add_hp
    // min hp = [0]*[1]+[3] & max hp = [0]*([1]+[2])+[3])
    // example: the Iron Golem, hpdice={15,7,4,0}
    //      15*7 < hp < 15*(7+4),
    //       105 < hp < 165
    // hp will be around 135 each time.
    unsigned       hpdice[4];

    char AC; // armour class
    char ev; // evasion
    mon_spellbook_type sec;
    corpse_effect_type corpse_thingy;
    zombie_size_type   zombie_size;
    shout_type         shouts;
    mon_intel_type     intel;
    habitat_type     habitat;
    flight_type      fly;
    char             speed;        // How quickly speed_increment increases
    mon_energy_usage energy_usage; // And how quickly it decreases
    mon_itemuse_type gmon_use;
    mon_itemeat_type gmon_eat;
    size_type size;
};

habitat_type grid2habitat(dungeon_feature_type grid);
dungeon_feature_type habitat2grid(habitat_type ht);

monsterentry *get_monster_data(int p_monsterid);
const mon_resist_def &get_mons_class_resists(int mc);
mon_resist_def get_mons_resists(const monsters *mon);

void init_monsters();
void init_monster_symbols();

monsters *monster_at(const coord_def &pos);

// this is the old moname()
std::string mons_type_name(int type, description_level_type desc);

bool give_monster_proper_name(monsters *mon, bool orcs_only = true);

flight_type mons_class_flies(int mc);
flight_type mons_flies(const monsters *mon, bool randarts = true);

bool mons_class_amphibious(int mc);
bool mons_amphibious(const monsters *mon);
bool mons_class_wall_shielded(int mc);
bool mons_wall_shielded(const monsters *mon);

mon_itemuse_type mons_class_itemuse(int mc);
mon_itemuse_type mons_itemuse(const monsters *mon);
mon_itemeat_type mons_class_itemeat(int mc);
mon_itemeat_type mons_itemeat(const monsters *mon);

bool mons_sense_invis(const monsters *mon);

int get_shout_noise_level(const shout_type shout);
shout_type mons_shouts(int mclass, bool demon_shout = false);

bool mons_is_ghost_demon(int mc);
bool mons_is_unique(int mc);

int mons_difficulty(int mtype);
int exper_value(const monsters *monster);

int hit_points(int hit_dice, int min_hp, int rand_hp);

int mons_type_hit_dice( int type );

int mons_resist_turn_undead( const monsters *mon );
bool mons_immune_magic( const monsters *mon );
const char* mons_resist_string(const monsters *mon);

int mons_damage(int mc, int rt);
mon_attack_def mons_attack_spec(const monsters *mon, int attk_number);

corpse_effect_type mons_corpse_effect(int mc);

bool mons_class_flag(int mc, int bf);

int mons_unusable_items(const monsters *mon);

mon_holy_type mons_class_holiness(int mc);

bool mons_is_mimic( int mc );
bool mons_is_statue( int mc, bool allow_disintegrate = false );
bool mons_is_demon( int mc );

bool mons_class_wields_two_weapons(int mc);
bool mons_wields_two_weapons(const monsters *m);
bool mons_self_destructs(const monsters *m);

mon_intel_type mons_class_intel(int mc);
mon_intel_type mons_intel(const monsters *mon);

// Use mons_habitat() and mons_primary_habitat() wherever possible,
// since the class variants do not handle zombies correctly.
habitat_type mons_class_habitat(int mc);
habitat_type mons_habitat(const monsters *mon);
habitat_type mons_class_primary_habitat(int mc);
habitat_type mons_primary_habitat(const monsters *mon);
habitat_type mons_class_secondary_habitat(int mc);
habitat_type mons_secondary_habitat(const monsters *mon);

bool intelligent_ally(const monsters *mon);

bool mons_skeleton(int mc);

int mons_weight(int mc);

int mons_class_base_speed(int mc);
int mons_class_zombie_base_speed(int zombie_base_mc);
int mons_base_speed(const monsters *mon);
int mons_real_base_speed(int mc);

bool mons_class_can_regenerate(int mc);
bool mons_can_regenerate(const monsters *mon);
int mons_zombie_size(int mc);
monster_type mons_zombie_base(const monsters *mon);
bool mons_class_is_zombified(int mc);
monster_type mons_base_type(const monsters *mon);
bool mons_is_zombified(const monsters *monster);
bool mons_class_can_be_zombified(int mc);
bool mons_can_be_zombified(const monsters *mon);
bool mons_class_can_use_stairs(int mc);
bool mons_can_use_stairs(const monsters *mon);
bool mons_enslaved_body_and_soul(const monsters *mon);
bool mons_enslaved_twisted_soul(const monsters *mon);
bool mons_enslaved_intact_soul(const monsters *mon);
bool mons_enslaved_soul(const monsters *mon);
bool name_zombie(monsters *mon, int mc, const std::string mon_name);
bool name_zombie(monsters *mon, const monsters* orig);

int mons_power(int mclass);

unsigned mons_char(int mc);

int mons_class_colour(int mc);
int mons_colour(const monsters *mon);

void mons_load_spells(monsters *mon, mon_spellbook_type book);

monster_type royal_jelly_ejectable_monster();
monster_type random_draconian_monster_species();

void define_monster(int midx);
void define_monster(monsters &mons);

void mons_pacify(monsters *mon, mon_attitude_type att = ATT_GOOD_NEUTRAL);

bool mons_should_fire(struct bolt &beam);

bool ms_direct_nasty(spell_type monspell);

bool ms_useful_fleeing_out_of_sight(const monsters *mon, spell_type monspell);
bool ms_quick_get_away(const monsters *mon, spell_type monspell);
bool ms_waste_of_time(const monsters *mon, spell_type monspell);
bool ms_low_hitpoint_cast(const monsters *mon, spell_type monspell);

bool mons_has_los_ability(monster_type mon_type);
bool mons_has_los_attack(const monsters *mon);
bool mons_has_ranged_spell(const monsters *mon, bool attack_only = false,
                           bool ench_too = true);
bool mons_has_ranged_attack(const monsters *mon);
bool mons_has_ranged_ability(const monsters *mon);

const char *mons_pronoun(monster_type mon_type, pronoun_type variant,
                         bool visible = true);

bool mons_aligned(int m1, int m2);
bool mons_atts_aligned(mon_attitude_type fr1, mon_attitude_type fr2);

bool mons_att_wont_attack(mon_attitude_type fr);
mon_attitude_type mons_attitude(const monsters *m);

bool mons_foe_is_mons(const monsters *mons);

bool mons_behaviour_perceptible(const monsters *mon);
bool mons_is_native_in_branch(const monsters *monster,
                              const branch_type branch = you.where_are_you);
bool mons_is_poisoner(const monsters *mon);
bool mons_is_confused(const monsters *m, bool class_too = false);
bool mons_is_wandering(const monsters *m);
bool mons_is_seeking(const monsters *m);
bool mons_is_fleeing(const monsters *m);
bool mons_is_panicking(const monsters *m);
bool mons_is_cornered(const monsters *m);
bool mons_is_lurking(const monsters *m);
bool mons_is_batty(const monsters *m);
bool mons_is_influenced_by_sanctuary(const monsters *m);
bool mons_is_fleeing_sanctuary(const monsters *m);
bool mons_was_seen(const monsters *m);
bool mons_is_known_mimic(const monsters *m);
bool mons_is_unknown_mimic(const monsters *m);
bool mons_is_skeletal(int mc);
bool mons_class_is_slime(int mc);
bool mons_is_slime(const monsters *mon);
bool mons_class_is_plant(int mc);
bool mons_is_plant(const monsters *mon);
bool mons_eats_items(const monsters *mon);
bool mons_eats_corpses(const monsters *mon);
bool mons_eats_food(const monsters *mon);
bool mons_has_lifeforce(const monsters *mon);
monster_type mons_genus(int mc);
monster_type mons_detected_base(monster_type mt);
monster_type mons_species(int mc);

bool mons_looks_stabbable(const monsters *m);
bool mons_looks_distracted(const monsters *m);

void mons_start_fleeing_from_sanctuary(monsters *monster);
void mons_stop_fleeing_from_sanctuary(monsters *monster);

bool mons_has_smite_attack(const monsters *monster);

bool mons_class_is_confusable(int mc);
bool mons_class_is_slowable(int mc);
bool mons_class_is_stationary(int mc);
bool mons_is_stationary(const monsters *mon);

bool mons_is_fast( const monsters *mon );
bool mons_is_projectile(int mc);
bool mons_is_insubstantial(int mc);
bool mons_has_blood(int mc);

bool invalid_monster(const monsters *mon);
bool invalid_monster_type(monster_type mt);
bool invalid_monster_index(int i);

bool monster_shover(const monsters *m);

bool monster_senior(const monsters *first, const monsters *second,
                    bool fleeing = false);
monster_type draco_subspecies(const monsters *mon);
unsigned char ugly_thing_random_colour();
int ugly_thing_colour_offset(const unsigned char colour);
std::string  draconian_colour_name(monster_type mon_type);
monster_type draconian_colour_by_name(const std::string &colour);

monster_type random_monster_at_grid(const coord_def& p);
monster_type random_monster_at_grid(dungeon_feature_type grid);

void         init_mon_name_cache();
monster_type get_monster_by_name(std::string name, bool exact = false);

std::string do_mon_str_replacements(const std::string &msg,
                                    const monsters* monster, int s_type = -1);

enum mon_body_shape
{
    MON_SHAPE_HUMANOID,
    MON_SHAPE_HUMANOID_WINGED,
    MON_SHAPE_HUMANOID_TAILED,
    MON_SHAPE_HUMANOID_WINGED_TAILED,
    MON_SHAPE_CENTAUR,
    MON_SHAPE_NAGA,
    MON_SHAPE_QUADRUPED,
    MON_SHAPE_QUADRUPED_TAILLESS,
    MON_SHAPE_QUADRUPED_WINGED,
    MON_SHAPE_BAT,
    MON_SHAPE_SNAKE, // Including eels and worms
    MON_SHAPE_FISH,
    MON_SHAPE_INSECT,
    MON_SHAPE_INSECT_WINGED,
    MON_SHAPE_ARACHNID,
    MON_SHAPE_CENTIPEDE,
    MON_SHAPE_SNAIL,
    MON_SHAPE_PLANT,
    MON_SHAPE_FUNGUS,
    MON_SHAPE_ORB,
    MON_SHAPE_BLOB,
    MON_SHAPE_MISC
};

mon_body_shape get_mon_shape(const monsters *mon);
mon_body_shape get_mon_shape(const int type);

std::string get_mon_shape_str(const monsters *mon);
std::string get_mon_shape_str(const int type);
std::string get_mon_shape_str(const mon_body_shape shape);

bool mons_class_can_pass(int mc, const dungeon_feature_type grid);
bool mons_can_pass(const monsters *mon, dungeon_feature_type grid);

mon_inv_type equip_slot_to_mslot(equipment_type eq);
mon_inv_type item_to_mslot(const item_def &item);

int scan_mon_inv_randarts(const monsters *mon,
                          artefact_prop_type ra_prop);

bool player_or_mon_in_sanct(const monsters* monster);
#endif