let currentPokemonId = null;

document.addEventListener("DOMContentLoaded", () => {
  const MAX_POKEMONS = 1050;
  const pokemonID = new URLSearchParams(window.location.search).get("id");
  const id = parseInt(pokemonID, 10);

  if (isNaN(id) || id < 1 || id > MAX_POKEMONS) {
    console.error(`Invalid Pokémon ID: ${id}`);
    return (window.location.href = "./index.html");
  }

  currentPokemonId = id;
  loadPokemon(id);
});

async function loadPokemon(id) {
  try {
    console.log(`Loading data for Pokémon ID ${id}...`);
    const pokemon = await fetch(`./get-pokemon.php?id=${id}`).then((res) =>
      res.json()
    );

    if (pokemon.error) {
      throw new Error(pokemon.error);
    }

    const abilitiesWrapper = document.querySelector(
      ".pokemon-detail-wrap .pokemon-detail.move"
    );
    abilitiesWrapper.innerHTML = "";

    if (currentPokemonId === id) {
      displayPokemonDetails(pokemon);
      document.querySelector(".body3-fonts.pokemon-description").textContent =
        pokemon.flavor_text;

      const [leftArrow, rightArrow] = ["#leftArrow", "#rightArrow"].map((sel) =>
        document.querySelector(sel)
      );
      leftArrow.removeEventListener("click", navigatePokemon);
      rightArrow.removeEventListener("click", navigatePokemon);

      if (id !== 1) {
        leftArrow.addEventListener("click", () => {
          navigatePokemon(id - 1);
        });
      }
      if (id !== 1050) {
        rightArrow.addEventListener("click", () => {
          navigatePokemon(id + 1);
        });
      }

      window.history.pushState({}, "", `./detail.html?id=${id}`);
    }

    return true;
  } catch (error) {
    console.error("An error occurred while fetching Pokémon data:", error);
    return (window.location.href = "./index.html");
  }
}

async function navigatePokemon(id) {
  currentPokemonId = id;
  await loadPokemon(id);
}

const typeColors = {
  normal: "#A8A878",
  fire: "#F08030",
  water: "#6890F0",
  electric: "#F8D030",
  grass: "#78C850",
  ice: "#98D8D8",
  fighting: "#C03028",
  poison: "#A040A0",
  ground: "#E0C068",
  flying: "#A890F0",
  psychic: "#F85888",
  bug: "#A8B820",
  rock: "#B8A038",
  ghost: "#705898",
  dragon: "#7038F8",
  dark: "#705848",
  steel: "#B8B8D0",
  dark: "#EE99AC",
};

function setElementStyles(elements, cssProperty, value) {
  elements.forEach((element) => {
    element.style[cssProperty] = value;
  });
}

function rgbaFromHex(hexColor) {
  return [
    parseInt(hexColor.slice(1, 3), 16),
    parseInt(hexColor.slice(3, 5), 16),
    parseInt(hexColor.slice(5, 7), 16),
  ].join(", ");
}

function setTypeBackgroundColor(pokemon) {
  const mainType = pokemon.types[0];
  const color = typeColors[mainType];

  if (!color) {
    console.warn(`Color not defined for type: ${mainType}`);
    return;
  }

  const detailMainElement = document.querySelector(".detail-main");
  setElementStyles([detailMainElement], "backgroundColor", color);
  setElementStyles([detailMainElement], "borderColor", color);

  setElementStyles(
    document.querySelectorAll(".power-wrapper > p"),
    "backgroundColor",
    color
  );

  setElementStyles(
    document.querySelectorAll(".stats-wrap p.stats"),
    "color",
    color
  );

  setElementStyles(
    document.querySelectorAll(".stats-wrap .progress-bar"),
    "color",
    color
  );

  const rgbaColor = rgbaFromHex(color);
  const styleTag = document.createElement("style");
  styleTag.innerHTML = `
    .stats-wrap .progress-bar::-webkit-progress-bar {
        background-color: rgba(${rgbaColor}, 0.5);
    }
    .stats-wrap .progress-bar::-webkit-progress-value {
        background-color: ${color};
    }
  `;
  document.head.appendChild(styleTag);
}

function capitalizeFirstLetter(string) {
  return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
}

function createAndAppendElement(parent, tag, options = {}) {
  const element = document.createElement(tag);
  Object.keys(options).forEach((key) => {
    element[key] = options[key];
  });
  parent.appendChild(element);
  return element;
}

function displayPokemonDetails(pokemon) {
  const { name, id, types, weight, height, abilities, hp, attack, defense, sp_attack, sp_defense, speed } = pokemon;
  const capitalizePokemonName = capitalizeFirstLetter(name);

  document.querySelector("title").textContent = capitalizePokemonName;

  const detailMainElement = document.querySelector(".detail-main");
  detailMainElement.classList.add(name.toLowerCase());

  document.querySelector(".name-wrap .name").textContent =
    capitalizePokemonName;

  document.querySelector(
    ".pokemon-id-wrap .body2-fonts"
  ).textContent = `#${String(id).padStart(3, "0")}`;

  const imageElement = document.querySelector(".detail-img-wrapper img");
  imageElement.src = pokemon.image_url;
  imageElement.alt = name;

  const typeWrapper = document.querySelector(".power-wrapper");
  typeWrapper.innerHTML = "";
  types.forEach((type) => {
    createAndAppendElement(typeWrapper, "p", {
      className: `body3-fonts type ${type}`,
      textContent: type,
    });
  });

  document.querySelector(
    ".pokemon-detail-wrap .pokemon-detail p.body3-fonts.weight"
  ).textContent = `${weight / 10}kg`;
  document.querySelector(
    ".pokemon-detail-wrap .pokemon-detail p.body3-fonts.height"
  ).textContent = `${height / 10}m`;

  const abilitiesWrapper = document.querySelector(
    ".pokemon-detail-wrap .pokemon-detail.move"
  );
  abilities.forEach((ability) => {
    createAndAppendElement(abilitiesWrapper, "p", {
      className: "body3-fonts",
      textContent: ability,
    });
  });

  const statsWrapper = document.querySelector(".stats-wrapper");
  statsWrapper.innerHTML = "";

  const statNameMapping = {
    hp: "HP",
    attack: "ATK",
    defense: "DEF",
    sp_attack: "SATK",
    sp_defense: "SDEF",
    speed: "SPD",
  };

  const stats = { hp, attack, defense, sp_attack, sp_defense, speed };

  Object.keys(stats).forEach((stat) => {
    const statDiv = document.createElement("div");
    statDiv.className = "stats-wrap";
    statsWrapper.appendChild(statDiv);

    createAndAppendElement(statDiv, "p", {
      className: "body3-fonts stats",
      textContent: statNameMapping[stat],
    });

    createAndAppendElement(statDiv, "p", {
      className: "body3-fonts",
      textContent: String(stats[stat]).padStart(3, "0"),
    });

    createAndAppendElement(statDiv, "progress", {
      className: "progress-bar",
      value: stats[stat],
      max: 100,
    });
  });

  setTypeBackgroundColor(pokemon);
}

function getEnglishFlavorText(pokemonSpecies) {
  for (let entry of pokemonSpecies.flavor_text_entries) {
    if (entry.language.name === "en") {
      let flavor = entry.flavor_text.replace(/\f/g, " ");
      return flavor;
    }
  }
  return "";
}