import * as THREE from 'three';

const EGA_COLORS = {
  BLACK: 0x000000,
  BLUE: 0x0000AA,
  GREEN: 0x00AA00,
  CYAN: 0x00AAAA,
  RED: 0xAA0000,
  MAGENTA: 0xAA00AA,
  BROWN: 0xAA5500,
  LIGHT_GRAY: 0xAAAAAA,
  DARK_GRAY: 0x555555,
  LIGHT_BLUE: 0x5555FF,
  LIGHT_GREEN: 0x55FF55,
  LIGHT_CYAN: 0x55FFFF,
  LIGHT_RED: 0xFF5555,
  YELLOW: 0xFFFF55,
  WHITE: 0xFFFFFF,
};

function flatMat(color) {
  return new THREE.MeshLambertMaterial({ color, flatShading: true });
}

export class Airport {
  constructor() {
    this.group = new THREE.Group();
  }

  createRunwayTexture() {
    const canvas = document.createElement('canvas');
    canvas.width = 512;
    canvas.height = 512;
    const ctx = canvas.getContext('2d');

    ctx.fillStyle = '#444444';
    ctx.fillRect(0, 0, 512, 512);

    // Edge lines
    ctx.fillStyle = '#FFFFFF';
    ctx.fillRect(18, 0, 4, 512);
    ctx.fillRect(490, 0, 4, 512);

    // Center dashed line
    for (let y = 0; y < 512; y += 40) {
      ctx.fillRect(254, y, 4, 20);
    }

    // Threshold markings
    for (let x = 30; x < 482; x += 28) {
      ctx.fillRect(x, 0, 14, 35);
      ctx.fillRect(x, 477, 14, 35);
    }

    // Touchdown zone markers
    for (let x = 60; x < 160; x += 40) {
      ctx.fillRect(x, 80, 10, 60);
      ctx.fillRect(x, 372, 10, 60);
    }

    const texture = new THREE.CanvasTexture(canvas);
    texture.magFilter = THREE.NearestFilter;
    texture.minFilter = THREE.NearestFilter;
    return texture;
  }

  buildRunway() {
    const runwayLength = 180;
    const runwayWidth = 30;

    const geometry = new THREE.PlaneGeometry(runwayWidth, runwayLength);
    geometry.rotateX(-Math.PI / 2);

    const texture = this.createRunwayTexture();

    const material = new THREE.MeshLambertMaterial({
      map: texture,
      flatShading: true,
    });

    const runway = new THREE.Mesh(geometry, material);
    runway.position.y = 0.1;
    this.group.add(runway);

    // Taxiway
    const taxiGeo = new THREE.PlaneGeometry(8, 120);
    taxiGeo.rotateX(-Math.PI / 2);
    const taxiMat = flatMat(0x555555);
    const taxi = new THREE.Mesh(taxiGeo, taxiMat);
    taxi.position.set(0, 0.15, -70);
    this.group.add(taxi);

    // Apron
    const apronGeo = new THREE.PlaneGeometry(60, 40);
    apronGeo.rotateX(-Math.PI / 2);
    const apron = new THREE.Mesh(apronGeo, taxiMat);
    apron.position.set(0, 0.15, -110);
    this.group.add(apron);
  }

  buildControlTower() {
    const tower = new THREE.Group();

    // Base cylinder (octagonal for low-poly look)
    const baseGeo = new THREE.CylinderGeometry(5, 6, 20, 8);
    const baseMat = flatMat(0xAAAAAA);
    const base = new THREE.Mesh(baseGeo, baseMat);
    base.position.y = 10;
    tower.add(base);

    // Cab (wider top)
    const cabGeo = new THREE.CylinderGeometry(7, 5, 6, 8);
    const cab = new THREE.Mesh(cabGeo, baseMat);
    cab.position.y = 23;
    tower.add(cab);

    // Windows (dark band around cab)
    const winGeo = new THREE.CylinderGeometry(6.5, 5.5, 3, 8);
    const winMat = flatMat(0x0000AA);
    const windows = new THREE.Mesh(winGeo, winMat);
    windows.position.y = 23;
    tower.add(windows);

    // Roof
    const roofGeo = new THREE.ConeGeometry(7.5, 3, 8);
    const roofMat = flatMat(0x555555);
    const roof = new THREE.Mesh(roofGeo, roofMat);
    roof.position.y = 27.5;
    tower.add(roof);

    // Antenna
    const antGeo = new THREE.CylinderGeometry(0.1, 0.1, 5, 4);
    const antenna = new THREE.Mesh(antGeo, flatMat(0xAA0000));
    antenna.position.y = 31;
    tower.add(antenna);

    tower.position.set(0, 0, -130);
    this.group.add(tower);
  }

  buildHangar(index) {
    const hangar = new THREE.Group();

    // Body
    const bodyGeo = new THREE.BoxGeometry(25, 10, 18);
    const bodyMat = flatMat(0x888888);
    const body = new THREE.Mesh(bodyGeo, bodyMat);
    body.position.y = 5;
    hangar.add(body);

    // Door
    const doorGeo = new THREE.BoxGeometry(14, 8, 0.5);
    const doorMat = flatMat(0x555555);
    const door = new THREE.Mesh(doorGeo, doorMat);
    door.position.set(0, 4, 9);
    hangar.add(door);

    // Pitched roof
    const roofShape = new THREE.Shape();
    roofShape.moveTo(-13, 0);
    roofShape.lineTo(0, 6);
    roofShape.lineTo(13, 0);
    roofShape.lineTo(-13, 0);

    const extrudeSettings = { depth: 20, bevelEnabled: false };
    const roofGeo = new THREE.ExtrudeGeometry(roofShape, extrudeSettings);
    const roofMat = flatMat(0xAA4444);
    const roof = new THREE.Mesh(roofGeo, roofMat);
    roof.position.set(0, 10, -10);
    hangar.add(roof);

    const xOffset = (index - 1) * 40;
    hangar.position.set(xOffset, 0, -160);
    this.group.add(hangar);
  }

  buildFuelTruck() {
    const truck = new THREE.Group();

    // Body
    const bodyGeo = new THREE.BoxGeometry(2, 2, 4);
    const bodyMat = flatMat(0xAA5500);
    const body = new THREE.Mesh(bodyGeo, bodyMat);
    body.position.y = 1;
    truck.add(body);

    // Cabin
    const cabGeo = new THREE.BoxGeometry(2, 1.5, 1.5);
    const cabMat = flatMat(0xAAAAAA);
    const cab = new THREE.Mesh(cabGeo, cabMat);
    cab.position.set(0, 2.25, -1.5);
    truck.add(cab);

    truck.position.set(20, 0, -90);
    this.group.add(truck);
  }

  build() {
    this.buildRunway();
    this.buildControlTower();
    for (let i = 0; i < 3; i++) {
      this.buildHangar(i);
    }
    this.buildFuelTruck();

    // Small windsock near runway
    const poleGeo = new THREE.CylinderGeometry(0.1, 0.1, 5, 4);
    const pole = new THREE.Mesh(poleGeo, flatMat(0xAAAAAA));
    pole.position.set(-20, 2.5, 10);
    this.group.add(pole);

    const sockGeo = new THREE.ConeGeometry(0.8, 3, 6);
    const sockMat = flatMat(0xFF5555);
    const sock = new THREE.Mesh(sockGeo, sockMat);
    sock.rotation.z = Math.PI / 2;
    sock.position.set(-21.5, 4.5, 10);
    this.group.add(sock);
  }

  getGroup() {
    return this.group;
  }
}