// Моб AI
import { state } from '../core/state.js';
import { GRAV, GRAV_WATER, TILE } from '../core/constants.js';
import { updateWaterFlag } from '../physics/water-detect.js';
import { calculateDamage } from '../entities/player.js';
import { playSound } from '../audio/sound-engine.js';
import { explodeAt } from '../world/tnt.js';
import { resolveY } from '../physics/collision.js';
import { resolveX } from '../physics/collision.js';
import { isSolid } from '../world/world-storage.js';
import { getCachedBiome } from '../world/generation.js';

export function mobAI(m, dt) {
  updateWaterFlag(m);

  if (m.kind === 'zombie') {
    const night = isNight();
    if (!night) { m.hp -= 30 * dt; m.vx *= 0.5; return; }
    const dir = Math.sign((state.player.x) - m.x);
    m.vx = dir * m.speed;
    if (m.inWater && Math.random() < 0.06) m.vy = -260;
    if (Math.abs((m.x + m.w / 2) - (state.player.x + state.player.w / 2)) < 28 &&
      Math.abs((m.y + m.h / 2) - (state.player.y + state.player.h / 2)) < 40 &&
      state.player.invuln <= 0) {
      const damage = calculateDamage(15);
      state.player.hp -= damage;
      state.player.invuln = 0.8;
      state.player.vx += dir * 420;
      state.player.vy -= 260;
      playSound('hit1');
    }
  } else if (m.kind === 'creeper') {
    const night = isNight();
    if (!night) { m.hp -= 30 * dt; m.vx *= 0.5; return; }
    const dir = Math.sign((state.player.x) - m.x);
    const dist = Math.hypot((state.player.x + state.player.w / 2) - (m.x + m.w / 2), (state.player.y + state.player.h / 2) - (m.y + m.h / 2));
    m.vx = dir * m.speed;
    if (m.inWater && Math.random() < 0.06) m.vy = -260;
    if (dist < 60) {
      m.fuse -= dt;
      if (m.fuse <= 0) {
        explodeAt(Math.floor((m.x + m.w / 2) / TILE), Math.floor((m.y + m.h / 2) / TILE));
        m.hp = 0;
      }
    } else {
      if (dist < 40) {
        m.fuse = 0.5;
      }
    }
  } else if (m.kind === 'skeleton') {
    const night = isNight();
    if (!night) { m.hp -= 30 * dt; m.vx *= 0.5; return; }
    const dir = Math.sign((state.player.x) - m.x);
    const dist = Math.hypot((state.player.x + state.player.w / 2) - (m.x + m.w / 2), (state.player.y + state.player.h / 2) - (m.y + m.h / 2));
    m.vx = dir * m.speed;
    if (m.inWater && Math.random() < 0.06) m.vy = -260;
    m.shootCooldown -= dt;
    if (dist < 300 && m.shootCooldown <= 0) {
      m.shootCooldown = 2.0;
      const dx = (state.player.x + state.player.w / 2) - (m.x + m.w / 2);
      const dy = (state.player.y + state.player.h / 2) - (m.y + m.h / 2);
      const angle = Math.atan2(dy, dx);
      const speed = 450;
      state.projectiles.push({
        x: m.x + m.w / 2,
        y: m.y + m.h / 3,
        vx: Math.cos(angle) * speed,
        vy: Math.sin(angle) * speed,
        dmg: 6,
        owner: 'mob',
        life: 3
      });
    }
  } else if (m.kind === 'scorpion') {
    // Скорпион — бежит к игроку, яд (замедление)
    const dir = Math.sign((state.player.x) - m.x);
    m.vx = dir * m.speed;
    if (m.inWater && Math.random() < 0.06) m.vy = -260;
    if (Math.abs((m.x + m.w / 2) - (state.player.x + state.player.w / 2)) < 28 &&
      Math.abs((m.y + m.h / 2) - (state.player.y + state.player.h / 2)) < 40 &&
      state.player.invuln <= 0) {
      const damage = calculateDamage(8);
      state.player.hp -= damage;
      state.player.invuln = 0.8;
      state.player.slowTimer = 3;
      state.player.vx += dir * 300;
      state.player.vy -= 200;
      playSound('hit1');
    }
  } else if (m.kind === 'polar_bear') {
    // Белый медведь — нейтрален, бродит
    m.aiT -= dt;
    if (m.aiT <= 0) {
      m.aiT = 2.0 + Math.random() * 3;
      m.dir = Math.random() < 0.5 ? -1 : 1;
      if (Math.random() < 0.3) m.dir = 0;
    }
    m.vx = m.dir * m.speed;
    if (m.inWater) m.vy = -120;
  } else if (m.kind === 'slime') {
    // Слизь — прыгает к игроку
    const dir = Math.sign((state.player.x + state.player.w / 2) - (m.x + m.w / 2));
    m.aiT -= dt;
    if (m.aiT <= 0) {
      m.aiT = 1.5 + Math.random() * 1.5;
      m.dir = dir;
      m.vy = -200;
    }
    m.vx = m.dir * m.speed;
  } else if (m.kind === 'eagle') {
    // Орёл — летает, атакует пикированием
    const dx = (state.player.x + state.player.w / 2) - (m.x + m.w / 2);
    const dy = (state.player.y + state.player.h / 2) - (m.y + m.h / 2);
    const dist = Math.hypot(dx, dy);
    if (dist < 400) {
      m.vx = Math.sign(dx) * m.speed;
      m.vy = dy > 0 ? 60 : -60;
    } else {
      m.aiT -= dt;
      if (m.aiT <= 0) {
        m.aiT = 2 + Math.random() * 3;
        m.dir = Math.random() < 0.5 ? -1 : 1;
      }
      m.vx = m.dir * m.speed * 0.5;
      m.vy = Math.sin(performance.now() / 1000) * 30;
    }
    // Атака при касании
    if (dist < 30 && state.player.invuln <= 0) {
      const damage = calculateDamage(10);
      state.player.hp -= damage;
      state.player.invuln = 0.8;
      state.player.vy -= 200;
      playSound('hit1');
    }
    // Орёл не падает — летающий моб
    m.vy *= 0.5;
    m.grounded = false;
  } else {
    // животные (pig, chicken)
    m.aiT -= dt;
    if (m.aiT <= 0) {
      m.aiT = 1.8 + Math.random() * 2.5;
      m.dir = Math.random() < 0.5 ? -1 : 1;
      if (Math.random() < 0.25) m.dir = 0;
    }
    m.vx = m.dir * (m.kind === 'chicken' ? 55 : 40);
    if (m.inWater) m.vy = -120;
  }

  // Мобы прыгают при столкновении со стеной
  if (m.grounded && Math.abs(m.vx) > 5 && m.kind !== 'eagle') {
    const probeX = m.vx > 0 ? m.x + m.w + 2 : m.x - 2;
    const probeGY = Math.floor((m.y + m.h - 1) / TILE);
    if (isSolid(Math.floor(probeX / TILE), probeGY)) {
      m.vy = -280;
    }
  }

  // физика моба
  const g = (m.inWater && m.kind !== 'eagle') ? GRAV_WATER : GRAV;
  m.vy += g * dt;

  m.y += m.vy * dt; m.grounded = false; resolveY(m);
  m.x += m.vx * dt; resolveX(m);
}

export function isNight() {
  return state.worldTime > 0.5;
}

// Mob loot table
export function getMobLoot(kind) {
  const table = {
    chicken:  [{item:'chicken_meat',min:1,max:2,chance:1},{item:'feather',min:0,max:1,chance:0.5}],
    pig:      [{item:'meat',min:1,max:2,chance:1}],
    zombie:   [{item:'meat',min:0,max:1,chance:0.5},{item:'iron_ingot',min:0,max:1,chance:0.3}],
    skeleton: [{item:'arrow',min:2,max:4,chance:1},{item:'bone',min:0,max:2,chance:0.6},{item:'bow',min:1,max:1,chance:0.15}],
    creeper:  [{item:'gunpowder',min:1,max:2,chance:1}],
    scorpion: [{item:'scorpion_stinger',min:0,max:1,chance:0.4}],
    polar_bear:[{item:'polar_fur',min:1,max:2,chance:0.8},{item:'meat',min:1,max:2,chance:1}],
    slime:    [{item:'slime_ball',min:1,max:2,chance:1}],
    eagle:    [{item:'eagle_feather',min:1,max:2,chance:0.7}]
  };
  return table[kind] || [];
}