/* =========================================================
 * REPRTERRA WEB — main.js
 * Bootstrap + game loop + app states.
 * ========================================================= */
'use strict';
window.RTS = window.RTS || {};

RTS.main = (function () {
  let appState = 'menu';      // 'menu' | 'playing' | 'over'
  let paused = false;
  let lastT = 0;
  let acc = 0;
  let hudT = 0, mmT = 0;
  let lastDaySeen = 1;

  const M = {};
  M.state = () => (appState === 'playing' && paused) ? 'playing' : appState;
  M.isPaused = () => paused;

  // ---------------------------------------------------------
  // SAVE STORAGE — localStorage glue around sim.serialize
  // ---------------------------------------------------------
  const SAVE_KEY = 'repterra-web-save-v2';
  const storage = {
    ok: (() => { try { localStorage.setItem('_rt', '1'); localStorage.removeItem('_rt'); return true; } catch (e) { return false; } })(),
    has() { try { return !!localStorage.getItem(SAVE_KEY); } catch (e) { return false; } },
    save(manual) {
      if (!this.ok || appState !== 'playing') return false;
      const snap = RTS.sim.serialize();
      if (!snap || snap.st.over) return false;
      try {
        localStorage.setItem(SAVE_KEY, JSON.stringify(snap));
        RTS.ui.toast(manual ? '💾 Colony saved.' : '💾 Dawn autosave.', '');
        return true;
      } catch (e) { return false; }
    },
    autosave() { this.save(false); },
    load() {
      if (!this.ok) return false;
      try {
        const raw = localStorage.getItem(SAVE_KEY);
        if (!raw) return false;
        if (!RTS.sim.deserialize(raw)) return false;
        const q = RTS.sim.hq();
        if (q) { RTS.render.cam.x = q.x; RTS.render.cam.y = q.y; RTS.render.cam.zoom = Math.max(RTS.render.cam.zoom, 1.0); }
        paused = false;
        document.getElementById('pauseoverlay').style.display = 'none';
        appState = 'playing';
        lastDaySeen = RTS.sim.state().day;
        RTS.ui.hideEnd && RTS.ui.hideEnd();
        RTS.ui.showMenu(false);
        RTS.ui.select(null);
        RTS.ui.setPlacing(null);
        RTS.ui.toast('📂 Welcome back — Day ' + RTS.sim.state().day + '.', '');
        return true;
      } catch (e) { console.error('load failed', e); return false; }
    },
  };
  RTS.storage = storage;

  M.boot = function () {
    const cv = document.getElementById('game');
    RTS.render.init(cv);
    RTS.ui.init();
    RTS.input.attach(cv);
    RTS.input.ui = RTS.ui;

    // minimap
    const mm = document.getElementById('minimap');
    mm.width = 176; mm.height = 176;

    window.addEventListener('resize', () => RTS.render.resize());

    // minimap click-to-jump
    mm.addEventListener('mousedown', (e) => {
      const st = RTS.sim.state();
      if (!st) return;
      const r = mm.getBoundingClientRect();
      RTS.render.cam.x = (e.clientX - r.left) / r.width * st.world.tiles.W;
      RTS.render.cam.y = (e.clientY - r.top) / r.height * st.world.tiles.H;
      RTS.render.clampCam();
    });

    RTS.ui.showMenu(true);
    requestAnimationFrame(loop);
  };

  M.startGame = function (diff) {
    RTS.audio.resume();
    RTS.sim.newGame(diff);
    const q = RTS.sim.hq();
    RTS.render.cam.x = q.x; RTS.render.cam.y = q.y; RTS.render.cam.zoom = 1.1;
    paused = false;
    appState = 'playing';
    lastDaySeen = 1;
    RTS.ui.hideEnd();
    RTS.ui.showMenu(false);
    RTS.ui.setPlacing(null);
    RTS.ui.select(null);
    RTS.ui.toast('Colony established. Build houses and generators first!', '');
    setTimeout(() => { if (appState === 'playing') RTS.ui.toast('Tip: Pteranodons FLY over walls — keep Watchtowers ready.', ''); }, 6000);
  };

  M.restart = function () { M.startGame(RTS.sim.state() ? RTS.sim.state().diff : 'normal'); };
  M.loadSave = function () { storage.load(); };
  M.toMenu = function () {
    appState = 'menu';
    RTS.ui.showEnd ? null : null;
    document.getElementById('endscreen').style.display = 'none';
    RTS.ui.showMenu(true);
  };

  M.togglePause = function () {
    if (appState !== 'playing') return;
    paused = !paused;
    document.getElementById('pauseoverlay').style.display = paused ? 'flex' : 'none';
  };
  M.setSpeed = function (s) {
    if (!RTS.sim.state()) return;
    RTS.sim.state().speed = s;
    if (paused && s > 0) M.togglePause();
    markSpeedBtns(s);
  };
  M.bumpSpeed = function (d) {
    const st = RTS.sim.state();
    if (!st) return;
    M.setSpeed(Math.min(3, Math.max(1, st.speed + d)));
  };

  function markSpeedBtns(s) {
    document.querySelectorAll('#topbtns .tbtn').forEach((b) => {
      b.classList.toggle('active', b.textContent === s + '×');
    });
  }

  M.hotkey = function (key) {
    if (key === 'Enter') {
      // start with selected/default difficulty from menu
      const sel = document.querySelector('.diffbtn.sel') || document.querySelector('[data-diff="normal"]');
      if (sel && appState === 'menu') sel.click();
    }
  };

  // ---------------------------------------------------------
  function loop(t) {
    requestAnimationFrame(loop);
    const dtReal = Math.min(0.05, (t - lastT) / 1000 || 0.016);
    lastT = t;

    RTS.input.tick(dtReal);

    const st = RTS.sim.state();
    if (st && appState === 'playing') {
      if (!paused) {
        acc += dtReal * st.speed;
        let steps = 0;
        while (acc > 1 / 120 && steps < 12) {
          const step = Math.min(acc, 1 / 30);
          RTS.sim.tick(step);
          acc -= step;
          steps++;
        }
        checkEvents(st);
        if (st.over && !st.endShown) {
          st.endShown = true;
          setTimeout(() => { if (st.over) RTS.ui.showEnd(st); }, 1400);
        }
      }
      // draw
      RTS.render.draw(st, RTS.ui, t / 1000);
      hudT -= dtReal;
      if (hudT <= 0) { hudT = 0.25; RTS.ui.updateHUD(); }
      mmT -= dtReal;
      if (mmT <= 0) {
        mmT = 0.3;
        const mmCtx = document.getElementById('minimap').getContext('2d');
        RTS.render.drawMinimap(mmCtx, st, 176);
      }
      drawPings(st, dtReal);
    } else if (st && appState === 'over') {
      RTS.render.draw(st, RTS.ui, t / 1000);
    }
  }

  function drawPings(st, dt) {
    for (const p of RTS.ui.pings) p.t += dt;
    RTS.ui.pings = RTS.ui.pings.filter(p => p.t < 0.8);
  }

  // ---------------------------------------------------------
  let wasWarned = false, hqHitToast = false, brownToast = false;
  function checkEvents(st) {
    // wave spawn toast
    const w = st.waves[Math.max(0, st.waveIdx - 1)];
    if (w && w.spawned && !w._toast) {
      w._toast = true;
      RTS.ui.toast(w.final ? '☠ THE FINAL ASSAULT HAS BEGUN!' : '🌊 A dinosaur wave is attacking!', w.final ? 'bad' : 'warn');
      if (w.final) RTS.audio.roar();
    }
    // warning siren once
    if (st.warnT > 0 && !wasWarned) {
      wasWarned = true;
      RTS.ui.toast('⚠ Dinosaur horde spotted approaching the colony!', 'bad');
    }
    if (st.warnT <= 0) wasWarned = false;
    // HQ under attack
    const q = RTS.sim.hq();
    if (q && q.hp < q.maxHp && !hqHitToast) {
      hqHitToast = true;
      RTS.ui.toast('🏛️ THE COMMAND CENTER IS UNDER ATTACK!', 'bad');
      RTS.audio.alarm();
    }
    if (q && q.hp >= q.maxHp) hqHitToast = false;
    // brownout
    if (st.energyUse > st.energyCap && !brownToast) {
      brownToast = true;
      RTS.ui.toast('⚡ Power shortage! Newest buildings are offline — build Generators.', 'warn');
    }
    if (st.energyUse <= st.energyCap) brownToast = false;
    // starving
    if (st.starving && !checkEvents._starve) {
      checkEvents._starve = true;
      RTS.ui.toast('🍖 Food shortage! Colonists are starving.', 'warn');
    }
    if (!st.starving) checkEvents._starve = false;
  }

  return M;
})();

window.addEventListener('DOMContentLoaded', () => RTS.main.boot());