import { getCard } from "./cards.js";
import { resolveEnemyAction } from "./enemies.js";

export function render(state, revealed) {
  renderEnemy(state);
  renderInfoBar(state);
  renderHand(state);
  renderOverlay(state, revealed);
}

function renderEnemy(state) {
  const { enemy, combat } = state;
  document.getElementById("enemy-name").textContent = enemy.name;
  document.getElementById("enemy-hp").textContent =
    `${enemy.hp}/${enemy.maxHp}`;
  document.getElementById("enemy-hp").style.width =
    `${(enemy.hp / enemy.maxHp) * 100}%`;
  document.getElementById("enemy-block").textContent =
    enemy.block > 0 ? `block: ${enemy.block}` : "";

  const statusEl = document.getElementById("enemy-status");
  const tokens = [];
  if (enemy.vulnerable > 0) tokens.push(`vuln ${enemy.vulnerable}`);
  if (enemy.weak > 0) tokens.push(`weak ${enemy.weak}`);
  if (enemy.strength > 0) tokens.push(`str ${enemy.strength}`);
  if (enemy.poison > 0) tokens.push(`psn ${enemy.poison}`);
  statusEl.textContent = tokens.join(" | ");

  const intentEl = document.getElementById("enemy-intent");
  if (combat.dieResult && combat.phase === "player_turn") {
    const action = resolveEnemyAction(
      enemy,
      combat.dieResult,
      enemy.trackPosition,
    );
    if (action) {
      intentEl.textContent = formatIntent(action, enemy);
    }
  } else {
    intentEl.textContent = "";
  }
}

function formatIntent(action, enemy) {
  if (!action?.effects) return "?";
  const parts = action.effects.map((e) => {
    if (e.type === "hit") {
      const damage = e.value + (enemy.strength || 0);
      return `attack ${damage}`;
    }
    if (e.type === "block") return `block ${e.value}`;
    if (e.type === "strength") return `str +${e.value}`;
    return e.type;
  });
  return parts.join(", ");
}

function renderInfoBar(state) {
  const { player } = state;
  document.getElementById("energy").textContent =
    `energy: ${player.energy}/${player.maxEnergy}`;
  document.getElementById("player-hp").textContent =
    `${player.hp}/${player.maxHp}`;
  document.getElementById("player-hp").style.width =
    `${(player.hp / player.maxHp) * 100}%`;
  document.getElementById("player-block").textContent =
    player.block > 0 ? `block: ${player.block}` : "";
  document.getElementById("player-strength").textContent =
    player.strength > 0 ? `str: ${player.strength}` : "";
  const playerStatus = document.getElementById("player-status");
  if (playerStatus) {
    const tokens = [];
    if (player.vulnerable > 0) tokens.push(`vuln ${player.vulnerable}`);
    if (player.weak > 0) tokens.push(`weak ${player.weak}`);
    playerStatus.textContent = tokens.join(" | ");
  }
  document.getElementById("draw-count").textContent = player.drawPile.length;
  document.getElementById("discard-count").textContent =
    player.discardPile.length;
}

function renderHand(state) {
  const handEl = document.getElementById("hand");
  const { player, combat } = state;

  handEl.innerHTML = "";
  player.hand.forEach((cardId, index) => {
    const card = getCard(cardId);
    const img = document.createElement("img");
    img.src = card.image || "";
    img.alt = `${card.name} (${card.cost})`;
    img.title = card.description;
    img.className = "card";
    img.dataset.index = index;

    if (index === combat.selectedCard) {
      img.classList.add("selected");
    }
    if (player.energy < card.cost) {
      img.classList.add("no-energy");
    }

    handEl.appendChild(img);
  });
}

function renderOverlay(state, revealed) {
  const overlay = document.getElementById("overlay");
  const overlayText = document.getElementById("overlay-text");
  const rewardCards = document.getElementById("reward-cards");
  const skipBtn = document.getElementById("skip-btn");

  if (state.combat.phase === "rewards" && revealed) {
    overlay.hidden = false;
    overlayText.textContent = "card reward";
    rewardCards.innerHTML = "";
    for (const cardId of revealed) {
      const card = getCard(cardId);
      const img = document.createElement("img");
      img.src = card.image || "";
      img.alt = card.name;
      img.title = `${card.name} (${card.cost}) - ${card.description}`;
      img.dataset.cardId = cardId;
      img.className = "reward-card";
      rewardCards.appendChild(img);
    }
    skipBtn.hidden = false;
  } else if (state.combat.phase === "ended") {
    overlay.hidden = false;
    overlayText.textContent =
      state.combat.result === "defeat"
        ? "defeat — click to restart"
        : "victory";
    rewardCards.innerHTML = "";
    skipBtn.hidden = true;
  } else {
    overlay.hidden = true;
    rewardCards.innerHTML = "";
    skipBtn.hidden = true;
  }
}