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#include "Player.hh"

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#include "Rope.hh"      

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#include "Engine.hh"

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#include "Graphics.hh"

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#include <math.h>

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Rope::Rope(Player &player) : 

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    PhysicsObject(player.state.world, ROPE_MASS, Vector(0,0), Vector(0,0), false), player(player), state(ROPE_FOLDED) 

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{

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    // XXX: better shape

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    std::vector<Vector> shape(4);

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    shape[0] = Vector(-1, -1);

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    shape[1] = Vector(-1, 1);

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    shape[2] = Vector(1, 1);

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    shape[3] = Vector(1, -1);

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    setShape(shape);

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}

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void Rope::throwRope (void) {

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    state = ROPE_FLYING;

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    // XXX: this should probably be more dynamic?

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    length = ROPE_LENGTH;

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    // copy position + velocity from player

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    position = player.getPosition();

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    velocity = player.getVelocity() + player.getDirection() * ROPE_VELOCITY;

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    // we are FLYING

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    inAir = true;

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    // enable the physics object

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    enable();

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}

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void Rope::onCollision() {

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    // attached to something!

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    state = ROPE_FIXED;

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    // stop movement

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    disable();

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    // set player's pivot

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    player.setPivot(this);

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}

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void Rope::release (void) {

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    // disable if we're flying

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    if (state == ROPE_FLYING)

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        disable();

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    // TODO make it fly first and fold only after it's close to the player

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    state = ROPE_FOLDED;

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    // player doesn't have a pivot anymore

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    player.setPivot(NULL);

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}

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void Rope::changeLength (float delta) {

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    length += delta;

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    if (length < 0)

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        length = 0;

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}

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RopeState Rope::getState (void) {

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    return state;

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}

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float Rope::getPivotForce (PhysicsObject *bob) {

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    if ((position - player.getPosition()).length() >= length)

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        return ROPE_FORCE;

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    else

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        return 0;

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}

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void Rope::draw (Graphics *g) const {

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    if (state == ROPE_FOLDED)

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        return;

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    g->get_gc()->draw_line(

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            player.getPosition().x, player.getPosition().y,

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            position.x, position.y, 

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            CL_Color::black

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    );

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}

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