#include "lephisto.h"
#include "log.h"
#include "pilot.h"
#include "player.h"
#include "toolkit.h"
#include "space.h"
#include "rng.h"
#include "economy.h"
#include "hook.h"
#include "board.h"

#define BOARDING_WIDTH  300   /**< Boarding window width. */
#define BOARDING_HEIGHT 200   /**< Boarding window height. */

#define BUTTON_WIDTH    50    /**< Boarding button width. */
#define BUTTON_HEIGHT   30    /**< Boarding button height. */

static void board_exit(unsigned int wdw, char* str);
static void board_stealCreds(unsigned int wdw, char* str);
static void board_stealCargo(unsigned int wdw, char* str);
static void board_stealFuel(unsigned int wdw, char* str);
static int  board_fail(unsigned int wdw);
static void board_update(unsigned int wdw);

/**
 * @fn void player_board(void)
 *
 * @brief Attempt to board the players target.
 * 
 * Creates the window on success.
 */
void player_board(void) {
  Pilot* p;
  unsigned int wdw;

  if(player->target == PLAYER_ID) {
    player_message("You need a target to board first!");
    return;
  }

  p = pilot_get(player->target);

  if(!pilot_isDisabled(p)) {
    player_message("You cannot board a ship that is not disabled!");
    return;
  }
  else if(vect_dist(&player->solid->pos, &p->solid->pos) >
          p->ship->gfx_space->sw * PILOT_SIZE_APROX) {
    player_message("You are too far away to board your target.");
    return;
  }
  else if((pow2(VX(player->solid->vel)-VX(p->solid->vel)) +
           pow2(VY(player->solid->vel)-VY(p->solid->vel))) >
          (double)pow2(MAX_HYPERSPACE_VEL)) {
    player_message("You are going too fast to board the ship.");
    return;
  }
  else if(pilot_isFlag(p, PILOT_BOARDED)) {
    player_message("Your target cannot be boarded again.");
    return;
  }

  /* Pilot will be boarded. */
  pilot_setFlag(p, PILOT_BOARDED);
  player_message("Boarding ship %s.", p->name);

  /* Tweak some values. */
  p->fuel = (double)RNG(100, p->fuel_max);

  /* Create the boarding window. */
  wdw = window_create("Boarding", -1, -1, BOARDING_WIDTH, BOARDING_HEIGHT);

  window_addText(wdw, 20, -30, 120, 60,
                 0, "txtCargo", &gl_smallFont, &cDConsole,
                 "SCreds:\n"
                 "Cargo:\n"
                 "Fuel:");

  window_addButton(wdw, 20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
      "btnStealCredits", "Credits", board_stealCreds);
  window_addButton(wdw, 20+BUTTON_WIDTH+20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
      "btnStealCargo", "Cargo", board_stealCargo);
  window_addButton(wdw, 20+2*(BUTTON_WIDTH+20), 20, BUTTON_WIDTH, BUTTON_HEIGHT,
      "btnStealCargo", "Fuel", board_stealFuel);

  window_addButton(wdw, -20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
      "btnBoardingClose", "Leave", board_exit);

  board_update(wdw);

  /* Run hook if needed. */
  pilot_runHook(p, PILOT_HOOK_BOARD);
}

/**
 * @brief Closes the boarding window.
 *    @param wdw Window triggered the function.
 *    @param str Unused.
 */
static void board_exit(unsigned int wdw, char* str) {
  (void) str;
  window_destroy(wdw);
}

/**
 * @brief Attempt to steal the boarding ships credits.
 *    @param wdw Window triggered the function.
 *    @param str Unused.
 */
static void board_stealCreds(unsigned int wdw, char* str) {
  (void)str;
  Pilot* p;

  p = pilot_get(player->target);

  if(p->credits == 0) {
    /* Can't steal from the poor. ;) */
    player_message("The ship has no SCreds.");
    return;
  }

  if(board_fail(wdw)) return;

  player->credits += p->credits;
  p->credits = 0;
  board_update(wdw); /* Update the lack of credits. */
  player_message("You manage to steal the ship's Scred.");
}

/**
 * @brief Attempt to steal the boarded ships cargo.
 *    @param wdw Window triggering the function.
 *    @param str Unused.
 */
static void board_stealCargo(unsigned int wdw, char* str) {
  (void)str;
  int q;
  Pilot* p;

  p = pilot_get(player->target);

  if(p->ncommodities==0) {
    /* No cargo. */
    player_message("The ship has no cargo.");
    return;
  }
  else if(pilot_cargoFree(player) <= 0) {
    player_message("You have no room for cargo.");
    return;
  }

  if(board_fail(wdw)) return;

  /** Steal as much as possible until full - @todo: Allow the player to choose. */
  q = 1;
  while((p->ncommodities > 0) && (q != 0)) {
    q = pilot_addCargo(player, p->commodities[0].commodity,
                       p->commodities[0].quantity);

    pilot_rmCargo(p, p->commodities[0].commodity, q);
  }

  board_update(wdw);
  player_message("You manage to steal the ship's cargo.");
}

/**
 * @brief 
 */
static void board_stealFuel(unsigned int wdw, char* str) {
  (void)str;
  Pilot* p;

  p = pilot_get(player->target);

  if(player->fuel <= 0.) { /* Urgh.. They don't have any fuel. */
    player_message("The ship has no fuel.");
    return;
  }
  else if(player->fuel == player->fuel_max) {
    player_message("Your ship is at maximum fuel capacity.");
    return;
  }

  if(board_fail(wdw)) return;

  /* Steal fuel. */
  player->fuel += p->fuel;

  /* Make sure doesn't overflow. */
  if(player->fuel > player->fuel_max) {
    p->fuel = player->fuel_max - player->fuel;
    player->fuel = player->fuel_max;
  }

  board_update(wdw);
  player_message("You manage to steal the ships fuel.");
}

/**
 * @brief Check to see if the hijack attempt failed.
 *    @return 1 on failure to board. Otherwise 0.
 */
static int board_fail(unsigned int wdw) {
  Pilot* p;

  p = pilot_get(player->target);

  /* Fail chance. */
  if(RNGF() > (0.5 *
      (10. + (double)p->ship->crew/10.+(double)player->ship->crew)))
    return 0;

  if(RNGF() < 0.4) { /* 40% of instadeath! */
    /* 33% of instant death. */
    p->armour = -1;
    player_message("You have tripped the ship's self destruct mechanism!");
  } else
    /* You just got locked out!! */
    player_message("The ship's security system locks %s out!",
        (player->ship->crew > 0) ? "your crew" : "you");

  board_exit(wdw, NULL);
  return 1;
}

/**
 * @brief Updates the boarding window.
 */
static void board_update(unsigned int wdw) {
  int i, j;
  char str[PATH_MAX];
  char cred[10];
  Pilot* p;

  p = pilot_get(player->target);
  j = 0;

  /* Credits. */
  credits2str(cred, p->credits, 2);

  j += snprintf(&str[j], PATH_MAX-j, "%s\n", cred);

  /* Commodities. */
  if(p->ncommodities == 0)
    j += snprintf(&str[j], PATH_MAX-j, "none\n");
  else {
    for(i = 0; i < p->ncommodities; i++)
      j += snprintf(&str[j], PATH_MAX-j,
               "%d %s\n",
               p->commodities[i].quantity, p->commodities[i].commodity->name);
  }

  /* Fuel. */
  if(p->fuel <= 0.)
    j += snprintf(&str[j], PATH_MAX-j, "none\n");
  else
    j += snprintf(&str[j], PATH_MAX-j, "%.0f Units\n", p->fuel);

  window_modifyText(wdw, "txtData", str);
}