#include "creature.h"
#include "dice.h"
#include "rules.h"
#include "feature.h"
#include "weapon.h"
#include "armor.h"
#include "attack.h"
#include "spellcasting.h"
#include <algorithm>
#include <iostream>
#include <sstream>
#include <iomanip>

using namespace std;

namespace creature {
    void Creature::init() {
        if(hpMax == -1) {
            // Initialize hp
            hpMax = getBonus(rules::Ability::Con()) * hit_die_count;
            for(int i = 0; i < hit_die_count; i++) {
                hpMax += dice::roll(hit_die_sides);
            }
            hp = hpMax;
        }
    }

    // True if type without matching qualifiers is in subdata
    bool conditionApplies(const string& type, const vector<rules::Qualifier>& qualifiers, const vector<dmgType> subdata) {
        bool applies = false;
        for(dmgType con : subdata) {
            if(con.type == type) {
                applies = true;
                for(auto qualifier : qualifiers) {
                    if(find(con.qualifiers.begin(), con.qualifiers.end(), qualifier) != con.qualifiers.end()) {
                        applies = false;
                    }
                }
            }
        }
        return applies;
    }

    void Creature::applyDamage(int amount, const string& type, const vector<rules::Qualifier>& qualifiers) {
        if(! conditionApplies(type, qualifiers, getDmgImmunities())) {
            if(conditionApplies(type, qualifiers, getDmgResistances())) {
                hp -= amount / 2;
            } else if(conditionApplies(type, qualifiers, getDmgVulnerabilities())) {
                hp -= amount * 2;
            } else {
                hp -= amount;
            }
        }
    }

    void Creature::applyHealing(int amount) {
        hp += amount;
        if(hp > hpMax) {
            hp = hpMax;
        }
    }

    int Creature::getSkillBonus(const rules::Skill& skill) const {
        int bonus = this->getBonus(skill.getAbility());
        if(skills.contains(skill)) {
            bonus += skills.at(skill) * getProficiency();
        }
        return bonus;
    }

    int Creature::getAbilitySaveBonus(const rules::Ability& ability) const {
        int bonus = this->getBonus(ability);
        if(find(saves.begin(), saves.end(), ability) != saves.end()) {
            bonus += getProficiency();
        }
        return bonus;
    }

    void Creature::addInventoryItem(shared_ptr<entry::Item> item) {
        inventory.push_back(item);
    }

    shared_ptr<entry::Spellcasting> Creature::getSpellcasting() const {
        for(auto f : getFeatures()) {
            if(f->getType() == "spells") {
                return dynamic_pointer_cast<entry::Spellcasting>(f);
            }
        }
        return shared_ptr<entry::Spellcasting>();
    } 

    void Creature::addSpell(shared_ptr<entry::Spell> spell) {
        auto sc = getSpellcasting();
        if(! sc) {
            throw runtime_error("Creature " + getName() + " has no spellcasting");
        }
        std::size_t level = spell->getLevel();
        while(sc->getSlotLevels().size() <= level) {
            sc->addSlotLevel();
        }
        sc->getSlotLevels()[level]->spells.push_back(spell);
    }

    void Creature::removeSpell(shared_ptr<entry::Spell> spell) {
        auto sc = getSpellcasting();
        if(sc) {
            if(sc->getSlotLevels().size() > (size_t) spell->getLevel()) {
                auto sl = sc->getSlotLevels()[spell->getLevel()];
                for(auto it = sl->spells.begin(); it != sl->spells.end(); it++) {
                    if(*it == spell) {
                        sl->spells.erase(it);
                        break;
                    }
                }
            }
        }
    }

    void Creature::removeInventoryItem(shared_ptr<entry::Item> item) {
        for(auto it = inventory.begin(); it != inventory.end(); it++) {
            if(*it == item) {
                inventory.erase(it);
                break;
            }
        }
    }

    map<rules::Skill, int> Creature::getSkills() const {
        map<rules::Skill, int> s;
        for(auto skill : skills) {
            s.insert({skill.first, getSkillBonus(skill.first)});
        }
        return s;
    }

    map<rules::Ability, int> Creature::getSaves() const {
        map<rules::Ability, int> s;
        for(auto save : saves) {
            s.insert({save, this->getBonus(save) + getProficiency()});
        }
        return s;
    }

    void Creature::setScore(const rules::Ability& ability, int score) {
        int initBonus = getBonus(ability);
        stats[ability] = score;
        if(ability == rules::Ability::Con()) {
            int delta = getBonus(ability) - initBonus;
            hpMax += delta * hit_die_count;
            hp += delta * hit_die_count;
        }
    }

    void Creature::setProfLevel(const rules::Skill& skill, int level) {
        skills[skill] = level;
        if(level == 0) {
            skills.erase(skill);
        }
    }

    void Creature::longRest() {
        hp = hpMax;
    }

    const int getAC(const Creature& c) {
        auto natArmor = c.getNaturalArmor();
        if(! natArmor.name.empty()) {
            return natArmor.bonus;
        }
        int dex = c.getBonus(rules::Ability::Dex());
        int baseBonus = 10 + dex;
        int miscBonus = 0;
        for(auto a : utils::castPtrs<entry::Item, entry::Armor>(c.getInventory())) {
            if(c.getScore(rules::Ability::Str()) < a->getStrRequirement()) {
                continue;
            }
            auto armorType = a->getArmorType();
            if(armorType== "misc" || armorType == "shield") {
                miscBonus += a->getACBonus();
            } else {
                baseBonus = a->getACBonus();
                if(armorType == "light") {
                    baseBonus += dex;
                } else if(armorType == "medium") {
                    baseBonus += (dex > 2)? 2 : dex;
                }
            }
        }
        return baseBonus + miscBonus;
    }

    vector<shared_ptr<entry::Weapon>> getAttacks(const Creature& c) {
        vector<shared_ptr<entry::Weapon>> a = utils::castPtrs<entry::Item, entry::Weapon>(c.getInventory());
        for(auto attack : utils::castPtrs<entry::Feature, entry::Attack>(c.getFeatures())) {
            a.push_back(shared_ptr<entry::Weapon>(new entry::Weapon(attack->getWeapon())));
        }
        return a;
    }

    rules::Ability getBestAbility(const std::vector<rules::Ability>& abilities, const Creature& c) {
        const rules::Ability* bestA = &abilities[0];
        for(auto a : abilities) {
            if(c.getBonus(a) > c.getBonus(*bestA)) {
                bestA = &a;
            }
        }
        return *bestA;
    }

    template<typename T> vector<string> mapItems(const vector<shared_ptr<T>>& items) {
        vector<string> out;
        for(auto i : items) {
            out.push_back(i->getName());
        }
        return out;
    }

    vector<string> dmgTypes2text(vector<dmgType> dmg) {
        vector<string> ret;
        for(dmgType t : dmg) {
            ret.push_back(t.getText());
        }
        return ret;
    }

    string formatDmgTypeVector(string title, vector<dmgType> dmg) {
        return title + ": " + utils::join(dmgTypes2text(dmg), "; ");
    }

    string Creature::getText() const {
        stringstream text;
        text << getGivenName() << " (" << getCreatureName() << "): " << getHP() << "/" << getHPMax() << " hp, " << getAC(*this) << " ac";
        if(! getNaturalArmor().name.empty()) {
            text << " (" << getNaturalArmor().name << ")";
        } else {
            string armor = utils::join(mapItems(utils::castPtrs<entry::Item, entry::Armor>(getInventory())), ", ");
            if(! armor.empty()) {
                text << " (" << armor << ")";
            }
        }
        text << ", speed " << getSpeed() << endl;
        text << "A cr " << getCR() << " " << getAlignment() << " " << getSize() << " " << getType() << "." << endl;
        text << "Stats:" << endl;
        using namespace rules;
        vector<rules::Ability> abilities {Ability::Str(), Ability::Dex(), Ability::Con(), Ability::Int(), Ability::Wis(), Ability::Cha()};
        for(auto ability : abilities) {
            text << " " << setw(6) << std::left << ability.getAbbrev();
        }
        text << endl;
        for(auto ability : abilities) {
            text << setw(7) << std::left << (to_string(getScore(ability)) + "(" + to_string(getBonus(ability)) + ")");
        }
        text << endl;
        text << "Senses: ";
        if(! getSenses().empty()) {
            text << utils::join(getSenses(), ", ") << ". ";
        }
        text << "Passive Perception " << 10 + getSkillBonus(rules::Skill::Perception()) << endl;
        if(! getLanguages().empty()) {
            text << "Languages: " << getLanguages() << endl;
        }
        text << "Proficiency: " << getProficiency() << endl;
        if(! getSkills().empty()) {
            text << endl << "Skills:" << endl;
            for(auto skill : getSkills()) {
                text << " * " << skill.first.getName() << " (+" << skill.second << ")" << endl;
            }
        }
        if(! getSaves().empty()) {
            text << endl << "Saves:" << endl;
            for(auto save : getSaves()) {
                text << " * " << save.first.getAbbrev() << " (+" << save.second << ")" << endl;
            }
        }
        if(! getDmgImmunities().empty()) {
            text << formatDmgTypeVector("\nDamage Immunities", getDmgImmunities()) << endl;
        }
        if(! getDmgResistances().empty()) {
            text << formatDmgTypeVector("\nDamage Resistances", getDmgResistances()) << endl;
        }
        if(! getDmgVulnerabilities().empty()) {
            text << formatDmgTypeVector("\nDamage Vulnerabilities", getDmgVulnerabilities()) << endl;
        }
        if(! getCondImmunities().empty()) {
            text << formatDmgTypeVector("\nCondition Immunities", getCondImmunities()) << endl;
        }
        if(! getFeatures().empty()) {
            text << endl << "Features:" << endl;
            for(auto f: getFeatures()) {
                text << " * " << f->getText(*this) << endl;
            }
        }
        if(! getInventory().empty()) {
            text << endl << "Inventory:" << endl;
            for(auto i : getInventory()) {
                text << " * " << i->getText(*this) << endl;
            }
        }
        if(! Entry::getText().empty()) {
            text << endl << Entry::getText() << endl;
        }

        return text.str();
    }
}