#include "Enemy.hpp"
#include "g_common.hpp"
#include "a_common.hpp"
#include <stdio.h>

Enemy::Enemy() {
  target = NULL;
  type = ENTITY_ENEMY;
  flags = ENTITY_LEFT;
  max_force = 3.0f;
  speed = 1.0f;
  damage = 1;
}
Enemy::~Enemy() {

}
void Enemy::doThink(int delta) {
  if (target == NULL) {
    std::vector<Entity*>::iterator entity_it, entity_end;
    for (entity_it = g_entities.begin(), entity_end = g_entities.end(); entity_it != entity_end; ++entity_it) {
      if ((*entity_it)->type == ENTITY_JULIET) {
        target = (*entity_it);
        break;
      }
    }
  } else {
    if (flags & ENTITY_DIE) {
      if (sprite.frame >= 10) {
        flags |= ENTITY_DESTROY;
      }
    } else if (flags & ENTITY_HURT) {
      if (!(flags & ENTITY_HAS_HURT)) {
        sprite.frame = 0;
        sprite.setAnimation(2);
        flags |= ENTITY_HAS_HURT;
      } else {
        if (sprite.frame >= 6) {
          sprite.frame = 0;
          sprite.setAnimation(0);
          flags &= ~ENTITY_HAS_HURT;
          flags &= ~ENTITY_HURT;
        }
      }
    } else if (flags & ENTITY_ATTACK) {
      if (sprite.frame == 6) { // frame 6 is hit
        if (!(flags & ENTITY_HAS_HIT)) {
          float diff_x = target->x - x;
          float diff_y = target->y - y;
          if (diff_y > -48 && diff_y < 48) {
            if (diff_x > 0 && diff_x < 32) {
              Mix_PlayChannel(-1, a_sfx[SFX_HIT], 0);
              target->takeDamage(damage);
              flags |= ENTITY_HAS_HIT;
              target->addForce((float)damage*3, (float)damage*3);
            } else if (diff_x <= 0 && diff_x > -32) {
              Mix_PlayChannel(-1, a_sfx[SFX_HIT], 0);
              target->takeDamage(damage);
              flags |= ENTITY_HAS_HIT;
              target->addForce(-(float)damage*3, (float)damage*3);
            }
          }
        }
      } else if (sprite.frame >= 10) {
        sprite.setAnimation(0);
        sprite.frame = 0;
        flags &= ~ENTITY_ATTACK;
        flags &= ~ENTITY_HAS_HIT;
        frame_time = 100;
      }
    } else {
      float diff_x = target->x - x;
      float diff_y = target->y - y;
      if (diff_x > -48 && diff_x < 48 && diff_y > -48 && diff_y < 48) {
        sprite.setAnimation(1);
        sprite.frame = 0;
        frame_time = 75;
        flags |= ENTITY_ATTACK;
      }
      if (target->x > x) {
        if (!(flags & ENTITY_RIGHT)) {
          flags |= ENTITY_RIGHT;
          flags &= ~ENTITY_LEFT;
          sprite.flipSprite();
        }
        if (vel_x > -max_force && vel_x < max_force) {
          if (sprite.frame == 4 || sprite.frame == 9) {
            addForce(speed, 0);
          } else {
            addForce(speed/2.0f, 0);
          }
          flags |= ENTITY_WALK;
        }
      } else if (target->x < x) {
        if (!(flags & ENTITY_LEFT)) {
          flags |= ENTITY_LEFT;
          flags &= ~ENTITY_RIGHT;
          sprite.flipSprite();
        }
        if (vel_x > -max_force && vel_x < max_force) {
          if (sprite.frame == 4 || sprite.frame == 9) {
            addForce(-speed, 0);
          } else {
            addForce(-(speed/2.0f), 0);
          }
          flags |= ENTITY_WALK;
        }
      }
      if (target->y > y+32) {
        if (!(flags & ENTITY_FALLING)) {
          flags |= ENTITY_JUMP;
          addForce(0, 2);
        }
      }
    }
  }
  frame_elapsed += delta;
  if (frame_elapsed >= frame_time) {
    frame_elapsed = 0;
    sprite.loopFrame();
  }
  if (health <= 0) {
    sprite.frame = 0;
    sprite.setAnimation(3);
    flags |= ENTITY_DIE;
    health = 100; // cheat
  }
}