#include "boss/ui.hpp"
#include "constants.hpp"
#include "components.hpp"
#include "animation.hpp"
#include <chrono>
#include <thread>
#include "sound.hpp"

namespace boss {
  using namespace guecs;

  UI::UI(shared_ptr<World> world, Entity boss_id) :
    $world(world),
    $boss_id(boss_id),
    $scene(world->get<components::BossFight>($boss_id)),
    $combat_ui(true)
  {
    std::string sprite_name = $scene.boss["sprite"];
    $boss_sprite = textures::get_sprite(sprite_name);

    // floor is std::optional
    if($scene.floor) {
      $floor_sprite = textures::get_sprite(*$scene.floor);
    }

    $player_sprite = textures::get_sprite($scene.player["sprite"]);

    dbc::check(animation::has(sprite_name), "add boss animation to animations.json");
    $boss_anim = animation::load(sprite_name);

    for(auto& fixture : $scene.fixtures) {
      std::string name = fixture["name"];
      auto st = textures::get_sprite(name);
      // clone the sprite so it can be positioned
      st.sprite = std::make_shared<sf::Sprite>(*st.texture);

      auto anim = animation::load(name);
      float scale = fixture["scale"];
      std::string cell = fixture["cell"];

      $fixtures.emplace_back(st, anim, cell, scale);
    }
  }

  void UI::init() {
    $arena.position(SCREEN_WIDTH-BOSS_VIEW_WIDTH,0, BOSS_VIEW_WIDTH, SCREEN_HEIGHT);
    $arena.set<Background>($arena.MAIN, {$arena.$parser, THEME.TRANSPARENT});
    auto& background = $arena.get<Background>($arena.MAIN);
    background.set_sprite($scene.background, true);

    $arena.layout(
        "[status|boss1 |boss2 |boss3 |boss4 |_]"
        "[torch1|boss5 |boss6 |boss7 |boss8 |torch2]"
        "[floor1|boss9 |boss10|boss11|boss12|_]"
        "[floor2|boss13|boss14|boss15|boss16|_]"
        "[floor3|player1|player2|player3|player4|_]"
        "[floor4|player5|player6|player7|player8|_]"
        );

    move_boss($scene.boss["start_pos"]);
    move_player($scene.player["start_pos"]);

    if($scene.floor) {
      position_sprite($floor_sprite, $scene.floor_pos, 1.0, false);
    }

    for(auto& fixture : $fixtures) {
      position_sprite(fixture.st, fixture.cell, fixture.scale, false);
    }

    $arena.init();

    $actions.position(0,0, SCREEN_WIDTH-BOSS_VIEW_WIDTH, SCREEN_HEIGHT);
    $actions.layout(
        "[*(200,400)combat|_]"
        "[_|_]"
        "[_|_]"
        "[_|_]"
        "[*(200,300)stats]"
        "[_]"
        "[_]");
    auto stats = $actions.entity("stats");
    $actions.set<Rectangle>(stats, {});
    $actions.set<Text>(stats, {L"stats"});

    $actions.init();

    auto& cell = $actions.cell_for("combat");
    $combat_ui.init(cell.x, cell.y, cell.w, cell.h);
  }

  void UI::position_sprite(textures::SpriteTexture& st, const std::string& cell_name, float scale, bool at_mid) {
    auto& cell = $arena.cell_for(cell_name);
    float x = float(at_mid ? cell.mid_x : cell.x);
    float y = float(at_mid ? cell.mid_y : cell.y);

    st.sprite->setPosition({x, y});
    st.sprite->setScale({scale, scale});
  }

  void UI::render(sf::RenderWindow& window) {
    $actions.render(window);
    $combat_ui.render(window);

    if($floor_sprite.sprite) {
      window.draw(*$floor_sprite.sprite);
    }

    $arena.render(window);

    window.draw(*$boss_sprite.sprite);
    window.draw(*$player_sprite.sprite);

    for(auto& fixture : $fixtures) {
      window.draw(*fixture.st.sprite);
    }
  }

  bool UI::mouse(float x, float y, Modifiers mods) {
    return $arena.mouse(x, y, mods)
      || $combat_ui.mouse(x, y, mods)
      || $actions.mouse(x, y, mods);
  }

  void UI::status(const std::wstring& msg) {
    $arena.show_text("status", msg);
  }

  void UI::move_boss(const std::string& cell_name) {
    position_sprite($boss_sprite, cell_name, $scene.boss["scale"], $scene.boss["mid_cell"]);

    auto& cell = $arena.cell_for(cell_name);
    $boss_pos = {float(cell.mid_x), float(cell.mid_y)};
  }

  void UI::move_player(const std::string& cell_name) {
    position_sprite($player_sprite, cell_name, $scene.player["scale"], $scene.player["mid_cell"]);
  }

  void UI::play_animations(sf::RenderWindow& window) {
    if($boss_anim.playing) {
      using namespace std::chrono_literals;
      auto& sound = $world->get<components::Sound>($boss_id);

      animation::apply($boss_anim, *$boss_sprite.sprite, $boss_pos);

      if($boss_anim.current == 1 && !sound::playing(sound.attack)) {
        sound::play(sound.attack);
      }

      // https://www.construct.net/en/blogs/ashleys-blog-2/using-lerp-delta-time-924

      // frame start
      render(window);
      window.display();
      // frame end
      // deltaTime = end - start
      // lerp(a, b, 1 - f ^ deltaTime)
      // std::this_thread::sleep_for(16ms);
    } else {
      animation::apply($boss_anim, *$boss_sprite.sprite, $boss_pos);
    }
  }
}