"use strict";

const GameControls = (function(){

    const GameControls = function(hollow_bond){

        const self = this,
              euler = new THREE.Euler(0, 0, 0, "YXZ"),
              keys = {
                  forward: false,
                  backward: false,
                  left: false,
                  right: false,
                  sprint: false,
                  crouch: false,
                  jump: false
              };

        let is_pointer_locked = false;

        this.standing_height = 1.75;
        this.player_width = this.standing_height / 4;
        this.player_radius = this.player_width / 2;
        this.crouch_height = this.standing_height / 2;
        this.current_height = this.standing_height;

        this.walk_speed = 3.5;
        this.sprint_speed = 6.2;
        this.crouch_speed = 1.8;

        this.velocity_y = 0;
        this.is_grounded = false;
        this.is_crouching = false;

        this.set_dimensions = height => {
            self.standing_height = height || 1.75;
            self.player_width = self.standing_height / 4;
            self.player_radius = self.player_width / 2;
            self.crouch_height = self.standing_height / 2;
            self.current_height = self.standing_height;
        };

        this.setup = dungeon => {
            const canvas = dungeon.renderer.domElement;

            canvas.addEventListener("click", () => canvas.requestPointerLock());
            document.addEventListener("pointerlockchange", () => {
                is_pointer_locked = (document.pointerLockElement === canvas);
            });

            document.addEventListener("mousemove", evt => {
                if(!is_pointer_locked) return;
                euler.setFromQuaternion(dungeon.camera.quaternion);
                euler.y -= evt.movementX * 0.002;
                euler.x -= evt.movementY * 0.002;
                euler.x = Math.max(-Math.PI / 2 + 0.01, Math.min(Math.PI / 2 - 0.01, euler.x));
                dungeon.camera.quaternion.setFromEuler(euler);
            });

            window.addEventListener("keydown", evt => {
                switch(evt.code){
                    case "KeyW": case "ArrowUp": keys.forward = true; break;
                    case "KeyS": case "ArrowDown": keys.backward = true; break;
                    case "KeyA": case "ArrowLeft": keys.left = true; break;
                    case "KeyD": case "ArrowRight": keys.right = true; break;
                    case "ShiftLeft": case "ShiftRight": keys.sprint = true; break;
                    case "KeyC": case "ControlLeft": keys.crouch = true; break;
                    case "Space": keys.jump = true; break;
                }
            });

            window.addEventListener("keyup", evt => {
                switch(evt.code){
                    case "KeyW": case "ArrowUp": keys.forward = false; break;
                    case "KeyS": case "ArrowDown": keys.backward = false; break;
                    case "KeyA": case "ArrowLeft": keys.left = false; break;
                    case "KeyD": case "ArrowRight": keys.right = false; break;
                    case "ShiftLeft": case "ShiftRight": keys.sprint = false; break;
                    case "KeyC": case "ControlLeft": keys.crouch = false; break;
                    case "Space": keys.jump = false; break;
                }
            });
        };

        this.update = (dungeon, delta) => {
            if(!is_pointer_locked) return;

            const gravity = hollow_bond.gravity || 9.81;

            // 1. Estado de agachado
            self.is_crouching = keys.crouch;
            const target_height = self.is_crouching ? self.crouch_height : self.standing_height;
            self.current_height += (target_height - self.current_height) * Math.min(1, 14 * delta);

            // 2. Velocidad de traslación
            let current_speed = self.walk_speed;
            if(self.is_crouching){
                current_speed = self.crouch_speed;
            } else if(keys.sprint){
                current_speed = self.sprint_speed;
            }

            // 3. Movimiento horizontal en XZ
            const input_dir = new THREE.Vector3();
            if(keys.forward)  input_dir.z -= 1;
            if(keys.backward) input_dir.z += 1;
            if(keys.left)     input_dir.x -= 1;
            if(keys.right)    input_dir.x += 1;

            if(input_dir.lengthSq() > 0){
                input_dir.normalize();
                const move_dir = new THREE.Vector3(input_dir.x, 0, input_dir.z);
                move_dir.applyAxisAngle(new THREE.Vector3(0, 1, 0), euler.y);

                dungeon.camera.position.x += move_dir.x * current_speed * delta;
                dungeon.camera.position.z += move_dir.z * current_speed * delta;
            }

            // 4. Salto
            if(self.is_grounded && keys.jump){
                const jump_height = self.standing_height / 2;
                self.velocity_y = Math.sqrt(2 * gravity * jump_height);
                self.is_grounded = false;
            }

            // 5. Aplicar gravedad en el aire
            self.velocity_y -= gravity * delta;
            dungeon.camera.position.y += self.velocity_y * delta;

            // Reiniciamos apoyo; sólo un suelo bajo los pies lo activará
            self.is_grounded = false;

            // 6. Comprobación de apoyo en la sala actual
            if(dungeon.current_room && dungeon.current_room.collider){
                dungeon.current_room.collider.resolve_player(dungeon.camera.position, self, self.player_radius);
            }

            // 7. Comprobación de marcos (solo de la sala actual y a la misma altura)
            if(dungeon.current_room && dungeon.current_room.model && dungeon.current_room.model.frames){
                const feet_y = dungeon.camera.position.y - self.current_height;

                for(const fid of dungeon.current_room.model.frames){
                    const f_obj = dungeon.objects.frame ? dungeon.objects.frame[fid] : null;
                    if(!f_obj || !f_obj.collider) continue;

                    // Comprobamos XZ y verificamos que el marco esté en este mismo piso (+- 1 metro)
                    const frame_y = f_obj.model ? f_obj.model.y : 0;
                    if(Math.abs(feet_y - frame_y) < 1.0){
                        if(f_obj.collider.contains(dungeon.camera.position.x, dungeon.camera.position.z)){
                            f_obj.collider.resolve_player(dungeon.camera.position, self, self.player_radius);
                        }
                    }
                }
            }
        };

    };

    return GameControls;
})();