#include "boss/fight.hpp"
#include "boss/system.hpp"
#include "animation.hpp"
#include "game_level.hpp"
#include <iostream>
#include "rand.hpp"
#include "events.hpp"

namespace boss {
  using namespace DinkyECS;

  Fight::Fight(shared_ptr<World> world, Entity boss_id, Entity player_id) :
    $world(world),
    $boss_id(boss_id),
    $battle(System::create_battle($world, $boss_id)),
    $ui(world, boss_id, player_id),
    $host(player_id)
  {
    $host_combat = $world->get_if<components::Combat>(player_id);
    dbc::check($host_combat,
        fmt::format("No combat for host with player_id={}", player_id));
    $ui.init();
  }

  void Fight::event(game::Event ev, std::any data) {

    // if the mouse event is handled the done, this may be wrong later
    if(handle_mouse(ev)) return;

    switch($state) {
      FSM_STATE(State, START, ev, data);
      FSM_STATE(State, PLAYER_REQUESTS, ev, data);
      FSM_STATE(State, EXEC_PLAN, ev, data);
      FSM_STATE(State, END, ev, data);
    }
  }

  void Fight::START(game::Event ev, std::any) {
    using enum game::Event;

    switch(ev) {
      // this is only if using the debug X key to skip it
      case TICK:
      case BOSS_START:
        $ui.status(L"PLAYER REQUESTS", L"COMMIT");
        $battle.ap_refresh();
        state(State::PLAYER_REQUESTS);
        break;
      default:
        break;
    }
  }

  void Fight::PLAYER_REQUESTS(game::Event ev, std::any data) {
    using enum game::Event;

    switch(ev) {
      // this is only if using the debug X key to skip it
      case BOSS_START:
        state(State::END);
        break;
      case COMBAT_START:
        System::plan_battle($battle, $world, $boss_id);
        $ui.status(L"EXEC PLAN", L"START");
        state(State::EXEC_PLAN);
        break;
      case ATTACK:
        if($battle.player_request("kill_enemy")) {
          fmt::println("player requests kill_enemy {} vs. {}",
              $host_combat->ap, $battle.player_pending_ap());
        } else {
          fmt::println("NO MORE ACTION!");
        }
        break;
      case TICK:
        break; // ignore tick
      default:
        break;
    }
  }

  void Fight::EXEC_PLAN(game::Event ev, std::any data) {
    using enum game::Event;

    switch(ev) {
      // this is only if using the debug X key to skip it
      case BOSS_START:
        state(State::END);
        break;
      case COMBAT_START:
        $ui.status(L"X TURN", L"STEP");
        next_combat_dumb_name();
        break;
      case COMBAT:
        do_combat(data);
        break;
      default:
        break;
    }
  }

  void Fight::next_combat_dumb_name() {
    if(auto action = $battle.next()) {
      System::combat(*action, $world, $boss_id, 0);
    } else if(player_dead()) {
      $ui.status(L"YOU DIED", L"DEAD");
      state(State::END);
    } else {
      $ui.status(L"PLAYER REQUESTS", L"COMMIT");
      $ui.reset_camera();
      $battle.ap_refresh();
      $battle.clear_requests();
      state(State::PLAYER_REQUESTS);
    }
  }

  void Fight::do_combat(std::any data) {
    using combat::BattleHostState;

    dbc::check(data.type() == typeid(components::CombatResult),
        fmt::format("Boss Fight wrong any data={}", data.type().name()));

    auto result = std::any_cast<components::CombatResult>(data);

    switch(result.host_state) {
      case BattleHostState::agree:
      case BattleHostState::disagree: {
        std::string player_move = Random::uniform(0, 1) == 0 ? "player1" : "player3";
        $ui.move_actor("player", player_move);
        if(result.player_did > 0) $ui.animate_actor("player");
        $ui.damage("player", "boss", result.player_did);
      } break;
      case BattleHostState::not_host: {
        std::string boss_move = Random::uniform(0, 1) == 0 ? "boss5" : "boss6";

        $ui.move_actor("boss", boss_move);
        if(result.enemy_did > 0) $ui.animate_actor("boss");
        $ui.damage("boss", "player", result.enemy_did);
      } break;
      case BattleHostState::out_of_ap:
        break;
    }

  }

  void Fight::END(game::Event ev, std::any) {
    fmt::println("BOSS_FIGHT:END event {}", (int)ev);
  }

  void Fight::run_systems() {
    $ui.update_stats();
    $battle.set($host, "tough_personality", false);
    $battle.set($host, "have_healing", false);
    $battle.set($host, "health_good", $host_combat->hp > 100);
  }

  void Fight::render(sf::RenderWindow& window) {
    $ui.play_animations();
    $ui.render();
  }

  bool Fight::handle_mouse(game::Event ev) {
    using enum game::Event;
    $mouse_pos = $window->mapPixelToCoords($router.position);

    switch(ev) {
      case MOUSE_CLICK: {
        $ui.mouse($mouse_pos.x, $mouse_pos.y, guecs::NO_MODS);
       } break;
      case MOUSE_MOVE: {
        $ui.mouse($mouse_pos.x, $mouse_pos.y, {1 << guecs::ModBit::hover});
       } break;
      case MOUSE_DRAG:
       dbc::log("mouse drag");
       break;
      case MOUSE_DRAG_START:
       dbc::log("mouse START drag");
       break;
      case MOUSE_DROP:
       dbc::log("mouse DROP");
       break;
      default:
       return false;
    }

    // switch/default didn't happen so handled it.
    return true;
  }

  bool Fight::player_dead() {
    return $host_combat->hp <= 0;
  }

  void Fight::init_fight() {
    System::initialize_actor_ai(*$world, $boss_id);
    run_systems();
  }

  void Fight::set_window(sf::RenderWindow* window) {
    $window = window;
    $ui.set_window(window);
  }

  bool Fight::handle_keyboard_mouse() {
    dbc::check($window != nullptr, "you didn't set_window");

    while(const auto ev = $window->pollEvent()) {
      auto gui_ev = $router.process_event(ev);

      if(gui_ev == game::Event::KEY_PRESS) {
        using KEY = sf::Keyboard::Scan;

        switch($router.scancode) {
          // REALLY? just go to state end or use another event
          case KEY::X:
            event(game::Event::BOSS_START, {});
            break;
          default:
            fmt::println("key press!");
        }
      } else if(gui_ev == game::Event::QUIT) {
        return true;
      } else {
        event(gui_ev, {});
      }
    }

    return in_state(State::END);
  }

  bool Fight::handle_world_events() {
    if($world->has_event<game::Event>()) {
      while($world->has_event<game::Event>()) {
        auto [evt, entity, data] = $world->recv<game::Event>();

        event(game::Event(evt), data);
        run_systems();
      }
    }

    return in_state(State::END);
  }
}