#ifndef MWMECHANICS_SPELLSUCCESS_H
#define MWMECHANICS_SPELLSUCCESS_H

#include "../mwworld/ptr.hpp"

#include <OgreVector3.h>

#include <components/esm/loadskil.hpp>

namespace ESM
{
    struct Spell;
    struct Ingredient;
    struct Potion;
    struct EffectList;
}

namespace MWMechanics
{
    class EffectKey;

    ESM::Skill::SkillEnum spellSchoolToSkill(int school);

    /**
     * @param spell spell to cast
     * @param actor calculate spell success chance for this actor (depends on actor's skills)
     * @param effectiveSchool the spell's effective school (relevant for skill progress) will be written here
     * @attention actor has to be an NPC and not a creature!
     * @return success chance from 0 to 100 (in percent)
     */
    float getSpellSuccessChance (const ESM::Spell* spell, const MWWorld::Ptr& actor, int* effectiveSchool = NULL);
    float getSpellSuccessChance (const std::string& spellId, const MWWorld::Ptr& actor, int* effectiveSchool = NULL);

    int getSpellSchool(const std::string& spellId, const MWWorld::Ptr& actor);
    int getSpellSchool(const ESM::Spell* spell, const MWWorld::Ptr& actor);

    /// @return >=100 for fully resisted. can also return negative value for damage amplification.
    float getEffectResistance (short effectId, const MWWorld::Ptr& actor, const MWWorld::Ptr& caster, const ESM::Spell* spell = NULL);

    float getEffectMultiplier(short effectId, const MWWorld::Ptr& actor, const MWWorld::Ptr& caster, const ESM::Spell* spell = NULL);

    class CastSpell
    {
    private:
        MWWorld::Ptr mCaster;
        MWWorld::Ptr mTarget;
    public:
        bool mStack;
        std::string mId; // ID of spell, potion, item etc
        std::string mSourceName; // Display name for spell, potion, etc
        Ogre::Vector3 mHitPosition; // Used for spawning area orb

    public:
        CastSpell(const MWWorld::Ptr& caster, const MWWorld::Ptr& target);

        bool cast (const ESM::Spell* spell);
        bool cast (const MWWorld::Ptr& item);
        bool cast (const ESM::Ingredient* ingredient);
        bool cast (const ESM::Potion* potion);

        /// @note Auto detects if spell, ingredient or potion
        bool cast (const std::string& id);

        void inflict (const MWWorld::Ptr& target, const MWWorld::Ptr& caster,
                      const ESM::EffectList& effects, ESM::RangeType range, bool reflected=false, bool exploded=false);

        void applyInstantEffect (const MWWorld::Ptr& target, const MWWorld::Ptr& caster, const MWMechanics::EffectKey& effect, float magnitude);
    };

}

#endif