#include "sign.h"
#include <list>
#include "util.h"
#include "consts.h"
#include "game.h"

void Sign::displayMessage(std::string text) {
  signDisplayState = SignInstructionState::FadingIn;
  signDisplayFade.start(1000);
  lines.clear();

  auto lineChunks = splitStr<std::list<std::string>>(text, "\\n");
  for (std::string lineChunk : lineChunks) {
    auto words = splitStr<std::list<std::string>>(lineChunk, " ");
    std::string prev = words.front();
    words.pop_front();
    std::string cur = prev;
    bool pauseLine = false;

    while (!words.empty()) {
      cur = prev + " " + words.front();

      int width = 0;
      TTF_SizeText(font_, cur.c_str(), &width, nullptr);
      if (width > MESSAGE_TEXT_WIDTH) {
        lines.push_back({.text = prev, .pause = pauseLine});
        pauseLine = !pauseLine;
        cur = words.front();
      } else if (words.size() == 1) {
        lines.push_back({.text = cur, .pause = true});
        cur = "";
      }

      prev = cur;
      words.pop_front();
    }

    if (!cur.empty()) {
      lines.push_back({.text = cur, .pause = true});
    }
  }

  lines.back().pause = true;
  linesToShow.push_back(lines.front());
  lines.pop_front();

  if (!linesToShow.back().pause) {
    linesToShow.push_back(lines.front());
    lines.pop_front();
  }
}

void Sign::update(size_t dt, Game& game) {
  SDL_Event e;
  bool pressedSpace = false;

  while (SDL_PollEvent(&e)) {
    if (e.type == SDL_QUIT) {
      game.quit = true;
    } else if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_SPACE && e.key.repeat == 0) {
      pressedSpace = true;
    }
  }

  switch (signDisplayState) {
    case SignInstructionState::Hidden: {
      // Shouldn't happen.
      break;
    }
    case SignInstructionState::FadingIn: {
      signDisplayFade.tick(dt);
      if (signDisplayFade.isComplete()) {
        signDisplayState = SignInstructionState::Visible;
      }

      break;
    }
    case SignInstructionState::FadingOut: {
      signDisplayFade.tick(dt);
      if (signDisplayFade.isComplete()) {
        signDisplayState = SignInstructionState::Hidden;
      }

      break;
    }
    case SignInstructionState::Visible: {
      if (pressedSpace) {
        bool fullyRevealed = true;
        for (const SignLine& line : linesToShow) {
          if (line.charsRevealed != line.text.size()) {
            fullyRevealed = false;
            break;
          }
        }

        if (fullyRevealed) {
          showNextArrow = false;

          if (linesToShow.back().pause) {
            linesToShow.back().pause = false;
            // Play a sound
          }
          if (lines.empty()) {
            linesToShow.clear();
            signDisplayState = SignInstructionState::FadingOut;
            signDisplayFade.start(1000);
            break;
          }
        }
      }

      textAdvTimer_.accumulate(dt);
      while (textAdvTimer_.step()) {
        bool advancedChars = false;
        for (SignLine& line : linesToShow) {
          if (line.charsRevealed < line.text.size()) {
            if (line.charsRevealed % CHARS_PER_BEEP == 0) {
              // Play a sound
              game.muxer.playSound("textbeep");
            }
            line.charsRevealed++;
            advancedChars = true;
            break;
          }
        }
        if (!advancedChars) {
          if (!lines.empty() && !linesToShow.back().pause) {
            if (linesToShow.size() == 2) {
              linesToShow.pop_front();
            }
            linesToShow.push_back(lines.front());
            lines.pop_front();
          } else {
            showNextArrow = true;
          }
        }
      }

      if (showNextArrow) {
        nextArrowBobTimer_.accumulate(dt);
        while (nextArrowBobTimer_.step()) {
          if (nextArrowBobDown_) {
            nextArrowBobPos++;

            if (nextArrowBobPos >= 4) {
              nextArrowBobDown_ = false;
            }
          } else {
            nextArrowBobPos--;

            if (nextArrowBobPos <= 0) {
              nextArrowBobDown_ = true;
            }
          }
        }
      }

      break;
    }
  }
}