<?php
    /**
     * Base monster entity file.
     *
     * Creates the entity and makes it available.
     *
     * @category Entity
     */

    /**
     * Require dependent entities if not present.
     */
    require_once(PATH::ENTITY . "Entity.php");
    require_once(PATH::ENTITY . "Skill.php");
    require_once(PATH::ENTITY . "Leader_Skill.php");
    require_once(PATH::ENTITY . "Source.php");
    require_once(PATH::ENTITY . "Inventory.php");
    require_once(PATH::ENTITY . "Monster_Transformation.php");

    /**
     * A monster.
     *
     * Represents an object from the table 'monster'.
     *
     * @category Entity
     */
    class Monster extends Entity{

        private $id;
        private $family;
        private $name;
        private $element;
        private $element_name;
        private $archetype;
        private $archetype_name;
        private $base_stars;
        private $natural_stars;
        private $obtainable;
        private $can_awaken;
        private $awaken_bonus;
        private $skill_ups_to_max;
        private $stats = array(
            "hp"  => 0,
            "atk" => 0,
            "def" => 0,
            "spd" => 0,
            "crr" => 0,
            "crd" => 0,
            "acc" => 0,
            "res" => 0,
        );
        private $raw_stats = array(
            "hp"  => 0,
            "atk" => 0,
            "def" => 0,
            "spd" => 0,
            "crr" => 0,
            "crd" => 0,
            "acc" => 0,
            "res" => 0,
        );
        private $max_level_statss = array(
            "hp"  => 0,
            "atk" => 0,
            "def" => 0,
            "spd" => 0,
            "crr" => 0,
            "crd" => 0,
            "acc" => 0,
            "res" => 0,
        );
        private $awakens_from;
        private $awakens_to;
        private $fusion_food;
        private $homunculus;
        private $craft_cost;
        private $flag_skills = false;
        private $leader_skill;
        private $leader_skill_id;
        private $skill = [];
        private $flag_essences = false;
        private $essences = [];
        private $flag_sources = false;
        private $sources = [];
        private $title;
        private $flag_transformation = false;
        private $transformation;

        /**
         * Constructor.
         *
         * Searches the database and retrieves the information about the
         * monster, populating it and it's items.
         *
         * @param int $id Monster identifier.
         */
        public function __construct($id){
            $this->id = $id;
            $statement = get_context()->get_db()->prepare("
              SELECT
                id,
                family,
                name,
                element,
                archetype,
                base_stars,
                natural_stars,
                obtainable,
                can_awaken,
                awaken_bonus,
                skill_ups_to_max,
                leader_skill,
                hp,
                attack,
                defense,
                speed,
                crit_rate,
                crit_damage,
                resistance,
                accuracy,
                raw_hp,
                raw_attack,
                raw_defense,
                max_lvl_hp,
                max_lvl_attack,
                max_lvl_defense,
                awakens_from,
                awakens_to,
                fusion_food,
                homunculus,
                craft_cost
              FROM monster
              WHERE id = :id;
            ");
            $statement->bindValue(':id', $id, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->family = $r["family"];
                $this->name = HTML::e($r["name"]);
                $this->element = $r["element"];
                switch($this->element){
                    case ELEMENT_ID::WATER:
                        $this->element_name = "Water";
                        break;
                    case ELEMENT_ID::FIRE:
                        $this->element_name = "Fire";
                        break;
                    case ELEMENT_ID::WIND:
                        $this->element_name = "Wind";
                        break;
                    case ELEMENT_ID::LIGHT:
                        $this->element_name = "Light";
                        break;
                    case ELEMENT_ID::DARK:
                        $this->element_name = "Dark";
                        break;
                }
                $this->archetype = $r["archetype"];
                switch($this->archetype){
                    case ARCHETYPE_ID::ATTACK:
                        $this->archetype_name = "Attack";
                        break;
                    case ARCHETYPE_ID::DEFENSE:
                        $this->archetype_name = "Defense";
                        break;
                    case ARCHETYPE_ID::HP:
                        $this->archetype_name = "HP";
                        break;
                    case ARCHETYPE_ID::SUPPORT:
                        $this->archetype_name = "Support";
                        break;
                    case ARCHETYPE_ID::MATERIAL:
                        $this->archetype_name = "Material";
                        break;
                }
                $this->base_stars = $r["base_stars"];
                $this->natural_stars = $r["natural_stars"];
                $this->obtainable = $r["obtainable"];
                if ($r["can_awaken"] == 1){
                    $this->can_awaken = true;
                }
                else{
                    $this->can_awaken = false;
                }
                $this->awaken_bonus = HTML::e($r["awaken_bonus"]);
                $this->skill_ups_to_max = $r["skill_ups_to_max"];
                if (strlen($r["leader_skill"]) > 0){
                    $this->leader_skill_id = $r["leader_skill"];
                }
                $this->stats["hp"]  = $r["hp"];
                $this->stats["atk"] = $r["attack"];
                $this->stats["def"] = $r["defense"];
                $this->stats["spd"] = $r["speed"];
                $this->stats["crr"] = $r["crit_rate"];
                $this->stats["crd"] = $r["crit_damage"];
                $this->stats["res"] = $r["resistance"];
                $this->stats["acc"] = $r["accuracy"];
                $this->min_stats["hp"]  = $r["raw_hp"];
                $this->min_stats["atk"] = $r["raw_attack"];
                $this->min_stats["def"] = $r["raw_defense"];
                $this->min_stats["spd"] = $r["speed"];
                $this->min_stats["crr"] = $r["crit_rate"];
                $this->min_stats["crd"] = $r["crit_damage"];
                $this->min_stats["res"] = $r["resistance"];
                $this->min_stats["acc"] = $r["accuracy"];
                $this->max_stats["hp"]  = $r["max_lvl_hp"];
                $this->max_stats["atk"] = $r["max_lvl_attack"];
                $this->max_stats["def"] = $r["max_lvl_defense"];
                $this->max_stats["spd"] = $r["speed"];
                $this->max_stats["crr"] = $r["crit_rate"];
                $this->max_stats["crd"] = $r["crit_damage"];
                $this->max_stats["res"] = $r["resistance"];
                $this->max_stats["acc"] = $r["accuracy"];

                $this->awakens_from = $r["awakens_from"];
                $this->awakens_to = $r["awakens_to"];
                if ($r["fusion_food"] == 1){
                    $this->fusion_food = true;
                }
                else{
                    $this->fusion_food = false;
                }
                if ($r["homunculus"] == 1){
                    $this->homunculus = true;
                }
                else{
                    $this->homunculus = false;
                }
                $this->craft_cost = $r["craft_cost"];
            }
            
            // Guess monster name
            if ($this->awakens_from == "" && $this->awakens_to == ""){
                // No to, no from. Silver monster.
                if ($this->base_stars >= 4){
                    // SFV Collab event monsters, always awakened.
                    $this->title = $this->name;
                }
                elseif($this->archetype == ARCHETYPE_ID::MATERIAL && $this->element == ELEMENT_ID::LIGHT){
                    // Rainbowmon, always awakened
                    $this->title = $this->name;
                }
                elseif($this->archetype == ARCHETYPE_ID::MATERIAL && $this->element == ELEMENT_ID::DARK){
                    // Devilmon, always unawakened, but dont include element
                    $this->title = $this->name;
                }
                else{
                    // Unawakeable monster
                    $this->title = $this->element_name . " " . $this->name;
                }
            }
            // Awakened
            elseif ($this->awakens_from != ""){
                $this->title = $this->name;
            }
            // Gold
            elseif (strlen($this->awakens_to) > 0){
                $this->title = $this->element_name . " " . $this->name;
            }
        }
        
        private function load_skills(){
            $statement = get_context()->get_db()->prepare("
              SELECT skill.id AS skill
              FROM
                skill,
                monster_skill
              WHERE
                skill.id = monster_skill.skill AND
                monster_skill.monster = :monster
              ORDER BY slot;
            ");
            $statement->bindValue(':monster', $this->id, SQLITE3_TEXT);
            $q = $statement->execute();
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                array_push($this->skill, new Skill($r["skill"]));
            }
            if ($this->leader_skill_id != null){
                $this->leader_skill = new Leader_Skill($this->leader_skill_id);
            }
            $this->flag_skills = true;
        }
        
        private function load_sources(){
            $statement = get_context()->get_db()->prepare("
              SELECT source
              FROM monster_source
              WHERE monster = :monster;
            ");
            $statement->bindValue(':monster', $this->id, SQLITE3_TEXT);
            $q = $statement->execute();
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                array_push($this->sources, new Source($r["source"]));
            }
            $this->flag_sources = true;
        }
        
        private function load_essences(){
            $statement = get_context()->get_db()->prepare("
              SELECT
                item,
                amount
              FROM monster_essence
              WHERE
                monster = :monster
              ORDER BY item;
            ");
            $statement->bindValue(':monster', $this->id, SQLITE3_TEXT);
            $q = $statement->execute();
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                $e = [
                    "item" => new Inventory($r["item"], INVENTORY_TYPE_ID::ESSENCES),
                    "amount" => $r["amount"]
                ];
                array_push($this->essences, $e);
            }
            $this->flag_essences = true;
        }
        
        private function load_transformation(){
            $statement = get_context()->get_db()->prepare("
              SELECT id
              FROM monster_transformation
              WHERE monster = :monster;
            ");
            $statement->bindValue(':monster', $this->id, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->transformation = new Monster_Transformation($r["id"]);
            }
            $this->flag_transformation = true;
        }
        
        /**
         * Retrieves the monster identifier.
         *
         * @return string Monster ID
         */
        public function get_id(){
            return $this->id;
        }
    
        /**
         * Retrieves the monsters family identifier.
         *
         * @return string Family ID.
         */
        public function get_family(){
            return $this->family;
        }
    
        /**
         * Retrieves the monster name.
         *
         * @return string Monster name.
         */
        public function get_name(){
            return $this->name;
        }
    
        /**
         * Retrieves the monster's element.
         * 
         * @see ELEMENT_ID
         *
         * @return int Element ID.
         */
        public function get_element(){
            return $this->element;
        }
    
        /**
         * Retrieves the monster's element name.
         *
         * @return string Element name.
         */
        public function get_element_name(){
            return $this->element_name;
        }
    
        /**
         * Retrieves the monster's archetype.
         * 
         * @see ARCHETYPE_ID
         *
         * @return int Monster's archetype ID.
         */
        public function get_archetype(){
            return $this->archetype;
        }
    
        /**
         * Retrieves the monster's archetype name.
         *
         * @return string Archetype name.
         */
        public function get_archetype_name(){
            return $this->archetype_name;
        }
    
        /**
         * Retrieves the monster's base stars.
         * Base stars are the default stars of the monsters in it's current form. I.E awakened
         * monsters have always one more base stars than their unawakened forms, and second awaken
         * monster always have 6 stars.
         *
         * @return int Monster base stars (1-6).
         */
        public function get_base_stars(){
            return $this->base_stars;
        }
    
        /**
         * Retrieves the monster's natural stars.
         * Natural stars are the default stars of the monsters in it's unawakened form.
         *
         * @return int Monster natural stars (1-5).
         */
        public function get_natural_stars(){
            return $this->natural_stars;
        }
    
        /**
         * Checks if the monster is obtainable.
         * Non obtainable monster are usually enemies (boses, towers, pure units...) 
         *
         * @return boolean True for obtainable monsters, false for unobtainable.
         */
        public function is_obtainable(){
            return $this->obtainable;
        }
    
        /**
         * Checks if the monster can be awakened.
         * It also includes monsters that can second awaken.
         *
         * @return boolean True if the monster can awaken, false otherwise.
         */
        public function can_awaken(){
            return $this->can_awaken;
        }
    
        /**
         * Retrieves the awakening bonus description.
         * Note that for second awakenings, the bonus always is described as "Secondary Awakening".
         * For units that can't awaken, it will return an empty string.
         *
         * @return string Awaken bonus.
         */
        public function get_awaken_bonus(){
            return $this->awaken_bonus;
        }
    
        /**
         * Retrieves the number of skill-ups needed to fully skill-up the monster.
         *
         * @return int Required skill-ups
         */
        public function get_skill_ups_to_max(){
            return $this->skill_ups_to_max;
        }
    
        /**
         * Retrieves the monster's leader skill.
         *
         * @return Leader_Skill The leader skill.
         */
        public function get_leader_skill(){
            if (! $this->flag_skills){
                $this->load_skills();
            }
            return $this->leader_skill;
        }

        /**
         * Retrieves the monster stats.
         * These stats are the ones for the monster in it's base grade, at max level.
         *
         * It's an associative array with the following keys:
         * atk, def, hp, spd, crr, crd, acc, res
         *
         * @see get_min_stats()
         * @see get_max_stats()
         *
         * @return int[] Monster stats.
         */
        public function get_stats(){
            return $this->stats;
        }

        /**
         * Retrieves the monster stats.
         * These stats are the ones for the monster in it's base grade, at level 1.
         *
         * It's an associative array with the following keys:
         * atk, def, hp, spd, crr, crd, acc, res
         *
         * @see get_stats()
         * @see get_max_stats()
         *
         * @return int[] Monster stats.
         */
        public function get_min_stats(){
            return $this->stats();
        }
        
        /**
         * Retrieves the monster stats.
         * These stats are the ones for the monster with 6 stars at level 40.
         *
         * It's an associative array with the following keys:
         * atk, def, hp, spd, crr, crd, acc, res
         *
         * @return int[] Monster stats.
         *
         * @see get_stats()
         * @see get_min_stats()
         */
        public function get_max_stats(){
            return $this->stats();
        }
    
        /**
         * Retrieves the identifier of the monster who awakens to this one.
         *
         * @return string Unawakened monster identifier, null for unawakened monsters.
         */
        public function get_awakens_from(){
            return $this->awakens_from;
        }
    
        /**
         * Retrieves the identifier of the monster this one awakens to.
         *
         * @return string Next awaken monster identifier, null for fully awakened monsters.
         */
        public function get_awakens_to(){
            return $this->awakens_to;
        }
    
        /**
         * Checks if skill-ups can be created by fussion.
         *
         * @return boolean True if skill-us can be fused, false otherwise.
         */
        public function has_fusion_food(){
            return $this->fusion_food;
        }
    
        /**
         * Checks if the monster is an Homunculus.
         *
         * @return boolean True if Homunculus, false otherwise.
         */
        public function is_homunculus(){
            return $this->homunculus;
        }
    
        /**
         * // TODO: Unimplemented.
         * Retrieves $craft_cost
         *
         * @return number
         */
        public function get_craft_cost(){
            return $this->craft_cost;
        }
    
        /**
         * Retrieves the monster skills
         *
         * @return Skill[] Monster skills.
         */
        public function get_skills(){
            if (! $this->flag_skills){
                $this->load_skills();
            }
            return $this->skill;
        }
    
        /**
         * Retrieves the essences required to awaken the monster.
         *
         * @return [[Inventory][int]] Essences required to awaken the monster.s
         */
        public function get_essences(){
            if (! $this->flag_essences){
                $this->load_essences();
            }
            return $this->essences;
        }
    
        /**
         * Retrieves the sources the monster can be obtained from.
         *
         * @return Source[] Array of sources.s
         */
        public function get_sources(){
            if (! $this->flag_sources){
                $this->load_sources();
            }
            return $this->sources;
        }
    
        /**
         * Retrieves the unit's $title
         * If awakened, it will be the awakened from name.
         * If unawakened, it will be <element> <name>.
         *
         * @return string Units title.
         */
        public function get_title(){
            return $this->title;
        }
    
        /**
         * Retrieves the unit this ne can transform to.
         *
         * @return Monster_Transformation The transformation, null if none.
         */
        public function get_transformation(){
            if (! $this->flag_transformation){
                $this->load_transformation();
            }
            return $this->transformation;
        }

        /**
         * Gets the path to the monster image. The image must be in the
         * img/monster/ directory, and it's name must be the monster id,
         * padded with '0' to 8 digits, and the extension must be '.png'.
         *
         * @return string Image URL, or a fixed unknown image.
         */
        public function get_image(){
            return APPLICATION::img("UNIT", $this->id);
        }

    }
?>