import Phaser from 'phaser';
import titleBackgroundUrl from '../../assets/images/taoyuan-oath-title.png';
import { portraitAssets } from '../data/portraitAssets';
import { storyBackgroundAssets } from '../data/storyAssets';

type UnitDirection = 'south' | 'east' | 'north' | 'west';

const unitWalkFrameCount = 4;
const unitSheetFrameSize = 313;
const unitWalkFrameRate = 8;
const unitIdleFrameRate = 4;
const unitSheetRows: Record<UnitDirection, number> = {
  south: 0,
  east: 1,
  north: 2,
  west: 3
};

type UnitSheetAsset = {
  key: string;
  url: string;
  actionKey: string;
  actionUrl: string;
};

const unitSheetModules = import.meta.glob('../../assets/images/units/unit-*.png', {
  eager: true,
  import: 'default'
}) as Record<string, string>;

function textureKeyFromPath(path: string) {
  const fileName = path.split('/').pop() ?? path;
  return fileName.replace(/\.png$/i, '');
}

const unitSheetUrls = Object.fromEntries(
  Object.entries(unitSheetModules).map(([path, url]) => [textureKeyFromPath(path), url])
);

const sourceUnitSheets: UnitSheetAsset[] = Object.entries(unitSheetUrls)
  .filter(([key]) => !key.endsWith('-actions'))
  .map(([key, url]) => ({
    key,
    url,
    actionKey: `${key}-actions`,
    actionUrl: unitSheetUrls[`${key}-actions`]
  }))
  .filter((sheet): sheet is UnitSheetAsset => Boolean(sheet.actionUrl))
  .sort((left, right) => left.key.localeCompare(right.key));

const animatedUnitSheets = sourceUnitSheets.map(({ key }) => ({ key }));

export class BootScene extends Phaser.Scene {
  constructor() {
    super('BootScene');
  }

  preload() {
    this.load.image('title-taoyuan', titleBackgroundUrl);
    this.load.image('story-militia', storyBackgroundAssets['story-militia']);
    Object.entries(portraitAssets).forEach(([key, url]) => this.load.image(`portrait-${key}`, url));

    sourceUnitSheets.forEach(({ key, url, actionKey, actionUrl }) => {
      this.load.spritesheet(key, url, {
        frameWidth: unitSheetFrameSize,
        frameHeight: unitSheetFrameSize
      });
      this.load.spritesheet(actionKey, actionUrl, {
        frameWidth: unitSheetFrameSize,
        frameHeight: unitSheetFrameSize
      });
    });
  }

  create() {
    this.createPetalTexture();
    this.createEquipmentIconTextures();
    this.createUnitAnimations();
    this.scene.start('TitleScene');
  }

  private createPetalTexture() {
    const graphics = this.make.graphics({ x: 0, y: 0 });
    graphics.fillStyle(0xf0a6a4, 1);
    graphics.fillEllipse(12, 10, 20, 9);
    graphics.fillStyle(0xf7c7bd, 0.75);
    graphics.fillEllipse(15, 8, 10, 4);
    graphics.generateTexture('petal', 24, 18);
    graphics.destroy();
  }

  private createEquipmentIconTextures() {
    this.createItemIcon('item-training-sword', (graphics) => this.drawSwordIcon(graphics, 0xbfd6e6, 0x6b4a2c));
    this.createItemIcon('item-twin-oath-blades', (graphics) => {
      this.drawSwordIcon(graphics, 0xe8edf7, 0x8a5a32, -4);
      this.drawSwordIcon(graphics, 0xd8b15f, 0x8a5a32, 4);
    });
    this.createItemIcon('item-green-dragon-glaive', (graphics) => this.drawPolearmIcon(graphics, 0x5fbf8f, 0xd8b15f));
    this.createItemIcon('item-serpent-spear', (graphics) => this.drawSpearIcon(graphics, 0xe0e8ef, 0xb86b55));
    this.createItemIcon('item-sky-piercer-halberd', (graphics) => this.drawPolearmIcon(graphics, 0xd8dfe6, 0xd95f4f));
    this.createItemIcon('item-white-feather-fan', (graphics) => this.drawFanIcon(graphics, 0xf3f0df, 0x6e8eb8));
    this.createItemIcon('item-yellow-turban-saber', (graphics) => this.drawSaberIcon(graphics, 0xd8b15f, 0x9c6b2f));
    this.createItemIcon('item-short-bow', (graphics) => this.drawBowIcon(graphics, 0xc58a4c, 0xe8dfca));
    this.createItemIcon('item-leader-axe', (graphics) => this.drawAxeIcon(graphics, 0xd8dfe6, 0x8d5a3a));

    this.createItemIcon('item-cloth-armor', (graphics) => this.drawRobeIcon(graphics, 0x91a8bc, 0xe8dfca));
    this.createItemIcon('item-lamellar-armor', (graphics) => this.drawArmorIcon(graphics, 0x7d8792, 0xd8b15f));
    this.createItemIcon('item-oath-robe', (graphics) => this.drawRobeIcon(graphics, 0x4e7aa8, 0xf0c0a8));
    this.createItemIcon('item-reinforced-lamellar', (graphics) => this.drawArmorIcon(graphics, 0xb8c4ce, 0x59a6d6));
    this.createItemIcon('item-rebel-vest', (graphics) => this.drawVestIcon(graphics, 0xb88b4a, 0xd8b15f));

    this.createItemIcon('item-peach-charm', (graphics) => this.drawCharmIcon(graphics, 0xf0a6a4, 0xd8b15f));
    this.createItemIcon('item-war-manual', (graphics) => this.drawBookIcon(graphics, 0x5b78a0, 0xe8dfca));
    this.createItemIcon('item-bravery-token', (graphics) => this.drawTokenIcon(graphics, 0xd8b15f, 0x9b4c3a));
    this.createItemIcon('item-grain-pouch', (graphics) => this.drawPouchIcon(graphics, 0xa7794a, 0xe8dfca));
    this.createItemIcon('item-yellow-scarf-charm', (graphics) => this.drawCharmIcon(graphics, 0xd8b15f, 0x8b6f2a));
    this.createItemIcon('item-wind-quiver', (graphics) => this.drawQuiverIcon(graphics, 0x8bb3c7, 0xe8dfca));
  }

  private createItemIcon(key: string, draw: (graphics: Phaser.GameObjects.Graphics) => void) {
    if (this.textures.exists(key)) {
      return;
    }

    const graphics = this.make.graphics({ x: 0, y: 0 });
    graphics.fillStyle(0x101820, 0);
    graphics.fillRect(0, 0, 28, 28);
    graphics.lineStyle(1, 0x05070a, 0.7);
    draw(graphics);
    graphics.generateTexture(key, 28, 28);
    graphics.destroy();
  }

  private drawSwordIcon(graphics: Phaser.GameObjects.Graphics, bladeColor: number, gripColor: number, offsetX = 0) {
    graphics.lineStyle(4, bladeColor, 1);
    graphics.beginPath();
    graphics.moveTo(8 + offsetX, 22);
    graphics.lineTo(20 + offsetX, 6);
    graphics.strokePath();
    graphics.lineStyle(2, 0xeff7ff, 0.8);
    graphics.beginPath();
    graphics.moveTo(11 + offsetX, 18);
    graphics.lineTo(18 + offsetX, 8);
    graphics.strokePath();
    graphics.lineStyle(3, 0xd8b15f, 1);
    graphics.beginPath();
    graphics.moveTo(6 + offsetX, 18);
    graphics.lineTo(12 + offsetX, 23);
    graphics.strokePath();
    graphics.fillStyle(gripColor, 1);
    graphics.fillCircle(8 + offsetX, 23, 2);
  }

  private drawPolearmIcon(graphics: Phaser.GameObjects.Graphics, bladeColor: number, accentColor: number) {
    graphics.lineStyle(3, 0x8d5a3a, 1);
    graphics.beginPath();
    graphics.moveTo(8, 24);
    graphics.lineTo(18, 5);
    graphics.strokePath();
    graphics.fillStyle(bladeColor, 1);
    graphics.fillTriangle(17, 4, 25, 8, 18, 15);
    graphics.lineStyle(2, accentColor, 1);
    graphics.beginPath();
    graphics.moveTo(16, 12);
    graphics.lineTo(23, 15);
    graphics.strokePath();
  }

  private drawSpearIcon(graphics: Phaser.GameObjects.Graphics, bladeColor: number, accentColor: number) {
    graphics.lineStyle(3, 0x8d5a3a, 1);
    graphics.beginPath();
    graphics.moveTo(7, 24);
    graphics.lineTo(20, 4);
    graphics.strokePath();
    graphics.fillStyle(bladeColor, 1);
    graphics.fillTriangle(18, 4, 24, 2, 22, 9);
    graphics.fillStyle(accentColor, 1);
    graphics.fillTriangle(15, 11, 20, 9, 17, 15);
  }

  private drawSaberIcon(graphics: Phaser.GameObjects.Graphics, bladeColor: number, gripColor: number) {
    graphics.lineStyle(4, bladeColor, 1);
    graphics.beginPath();
    graphics.moveTo(8, 22);
    graphics.lineTo(13, 15);
    graphics.lineTo(19, 8);
    graphics.lineTo(23, 6);
    graphics.strokePath();
    graphics.lineStyle(3, gripColor, 1);
    graphics.beginPath();
    graphics.moveTo(6, 21);
    graphics.lineTo(12, 23);
    graphics.strokePath();
  }

  private drawBowIcon(graphics: Phaser.GameObjects.Graphics, bowColor: number, stringColor: number) {
    graphics.lineStyle(3, bowColor, 1);
    graphics.beginPath();
    graphics.moveTo(20, 4);
    graphics.lineTo(14, 9);
    graphics.lineTo(11, 14);
    graphics.lineTo(14, 19);
    graphics.lineTo(20, 24);
    graphics.strokePath();
    graphics.lineStyle(1, stringColor, 1);
    graphics.beginPath();
    graphics.moveTo(20, 4);
    graphics.lineTo(20, 24);
    graphics.strokePath();
    graphics.lineStyle(2, 0xd8dfe6, 1);
    graphics.beginPath();
    graphics.moveTo(7, 14);
    graphics.lineTo(22, 14);
    graphics.strokePath();
  }

  private drawAxeIcon(graphics: Phaser.GameObjects.Graphics, bladeColor: number, gripColor: number) {
    graphics.lineStyle(3, gripColor, 1);
    graphics.beginPath();
    graphics.moveTo(9, 24);
    graphics.lineTo(18, 5);
    graphics.strokePath();
    graphics.fillStyle(bladeColor, 1);
    graphics.fillTriangle(16, 5, 25, 8, 16, 15);
    graphics.fillTriangle(16, 5, 9, 9, 15, 14);
  }

  private drawFanIcon(graphics: Phaser.GameObjects.Graphics, featherColor: number, ribColor: number) {
    graphics.lineStyle(2, ribColor, 1);
    graphics.beginPath();
    graphics.moveTo(16, 25);
    graphics.lineTo(5, 8);
    graphics.moveTo(16, 25);
    graphics.lineTo(10, 4);
    graphics.moveTo(16, 25);
    graphics.lineTo(16, 3);
    graphics.moveTo(16, 25);
    graphics.lineTo(22, 4);
    graphics.moveTo(16, 25);
    graphics.lineTo(27, 8);
    graphics.strokePath();
    graphics.fillStyle(featherColor, 0.96);
    graphics.fillEllipse(5, 9, 7, 15);
    graphics.fillEllipse(10, 6, 7, 17);
    graphics.fillEllipse(16, 5, 8, 18);
    graphics.fillEllipse(22, 6, 7, 17);
    graphics.fillEllipse(27, 9, 7, 15);
    graphics.fillStyle(0xd8b15f, 1);
    graphics.fillCircle(16, 25, 3);
  }

  private drawArmorIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillTriangle(14, 4, 24, 11, 20, 24);
    graphics.fillTriangle(14, 4, 4, 11, 8, 24);
    graphics.fillRect(8, 10, 12, 14);
    graphics.lineStyle(2, accentColor, 0.9);
    graphics.strokeRect(9, 11, 10, 12);
    graphics.lineStyle(1, 0x05070a, 0.6);
    graphics.beginPath();
    graphics.moveTo(10, 16);
    graphics.lineTo(18, 16);
    graphics.moveTo(11, 20);
    graphics.lineTo(17, 20);
    graphics.strokePath();
  }

  private drawRobeIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillTriangle(14, 4, 24, 24, 4, 24);
    graphics.fillStyle(0x101820, 0.45);
    graphics.fillTriangle(14, 8, 18, 24, 10, 24);
    graphics.lineStyle(2, accentColor, 1);
    graphics.beginPath();
    graphics.moveTo(14, 6);
    graphics.lineTo(14, 23);
    graphics.strokePath();
  }

  private drawVestIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillRect(7, 7, 14, 18);
    graphics.fillStyle(0x101820, 0.7);
    graphics.fillTriangle(11, 7, 17, 7, 14, 14);
    graphics.lineStyle(2, accentColor, 0.9);
    graphics.strokeRect(8, 8, 12, 16);
  }

  private drawCharmIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillRoundedRect(8, 7, 12, 16, 2);
    graphics.lineStyle(2, accentColor, 1);
    graphics.strokeRoundedRect(8, 7, 12, 16, 2);
    graphics.fillStyle(accentColor, 1);
    graphics.fillCircle(14, 15, 3);
  }

  private drawBookIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, pageColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillRect(6, 6, 16, 18);
    graphics.fillStyle(pageColor, 1);
    graphics.fillRect(9, 8, 10, 14);
    graphics.lineStyle(1, 0x101820, 0.65);
    graphics.beginPath();
    graphics.moveTo(14, 8);
    graphics.lineTo(14, 22);
    graphics.strokePath();
  }

  private drawTokenIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillCircle(14, 14, 9);
    graphics.lineStyle(2, accentColor, 0.9);
    graphics.strokeCircle(14, 14, 7);
    graphics.fillStyle(accentColor, 1);
    graphics.fillTriangle(14, 8, 18, 18, 10, 18);
  }

  private drawPouchIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, accentColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillRoundedRect(7, 10, 14, 13, 4);
    graphics.fillTriangle(10, 11, 18, 11, 14, 5);
    graphics.lineStyle(2, accentColor, 1);
    graphics.beginPath();
    graphics.moveTo(8, 13);
    graphics.lineTo(20, 13);
    graphics.strokePath();
  }

  private drawQuiverIcon(graphics: Phaser.GameObjects.Graphics, baseColor: number, arrowColor: number) {
    graphics.fillStyle(baseColor, 1);
    graphics.fillRoundedRect(10, 8, 9, 16, 2);
    graphics.lineStyle(2, arrowColor, 1);
    graphics.beginPath();
    graphics.moveTo(7, 6);
    graphics.lineTo(18, 20);
    graphics.moveTo(13, 5);
    graphics.lineTo(20, 19);
    graphics.strokePath();
  }

  private createUnitAnimations() {
    animatedUnitSheets.forEach(({ key }) => {
      (['south', 'east', 'north', 'west'] as UnitDirection[]).forEach((direction) => {
        const frames = Array.from({ length: unitWalkFrameCount }, (_, frameIndex) => ({
          key,
          frame: unitSheetRows[direction] * unitWalkFrameCount + frameIndex
        }));
        const walkAnimationKey = `${key}-walk-${direction}`;
        const idleAnimationKey = `${key}-idle-${direction}`;

        if (!this.anims.exists(walkAnimationKey)) {
          this.anims.create({
            key: walkAnimationKey,
            frames,
            frameRate: unitWalkFrameRate,
            repeat: -1
          });
        }

        if (!this.anims.exists(idleAnimationKey)) {
          this.anims.create({
            key: idleAnimationKey,
            frames,
            frameRate: unitIdleFrameRate,
            repeat: -1
          });
        }
      });
    });
  }
}