import Phaser from 'phaser';
import { soundDirector } from '../audio/SoundDirector';
import { getBattleScenario } from '../data/battles';
import { storyBackgroundAssets } from '../data/storyAssets';
import { getCampaignState } from '../state/campaignState';
import { palette } from '../ui/palette';

export class EndingScene extends Phaser.Scene {
  private readonly backgroundKey = 'story-wuzhang-jiangwei-inheritance';
  private ready = false;

  constructor() {
    super('EndingScene');
  }

  create() {
    this.ready = false;
    this.createFallbackTexture();
    this.ensureBackgroundLoaded(() => {
      this.ready = true;
      this.drawEnding();
    });
  }

  getDebugState() {
    const campaign = getCampaignState();
    return {
      scene: this.scene.key,
      ready: this.ready,
      campaignStep: campaign.step,
      latestBattleId: campaign.latestBattleId ?? null,
      completedBattles: Object.keys(campaign.battleHistory).length,
      rosterCount: campaign.roster.length,
      endingTitle: '북벌의 끝과 남은 뜻',
      backgroundKey: this.backgroundKey,
      backgroundReady: this.textures.exists(this.backgroundKey)
    };
  }

  private ensureBackgroundLoaded(onReady: () => void) {
    if (this.textures.exists(this.backgroundKey)) {
      onReady();
      return;
    }

    const url = storyBackgroundAssets[this.backgroundKey];
    if (!url) {
      onReady();
      return;
    }

    this.load.once('complete', onReady);
    this.load.once('loaderror', () => {
      console.warn(`Failed to load ending background ${this.backgroundKey}`);
    });
    this.load.image(this.backgroundKey, url);
    this.load.start();
  }

  private createFallbackTexture() {
    if (this.textures.exists('ending-fallback')) {
      return;
    }

    const graphics = this.make.graphics({ x: 0, y: 0 });
    graphics.fillStyle(0x080b10, 1);
    graphics.fillRect(0, 0, 1280, 720);
    graphics.fillStyle(0x152331, 1);
    graphics.fillRect(0, 0, 1280, 720);
    graphics.lineStyle(5, palette.gold, 0.42);
    graphics.beginPath();
    graphics.moveTo(120, 570);
    graphics.lineTo(1160, 170);
    graphics.strokePath();
    graphics.generateTexture('ending-fallback', 1280, 720);
    graphics.destroy();
  }

  private drawEnding() {
    const { width, height } = this.scale;
    const campaign = getCampaignState();
    const latestBattleTitle = campaign.latestBattleId ? getBattleScenario(campaign.latestBattleId).title : '기록 없음';
    const textureKey = this.textures.exists(this.backgroundKey) ? this.backgroundKey : 'ending-fallback';
    const background = this.add.image(width / 2, height / 2, textureKey);
    const source = this.textures.get(textureKey).getSourceImage();
    const coverScale = Math.max(width / source.width, height / source.height);

    background.setScale(coverScale * 1.08);
    background.setPosition(width / 2 - 14, height / 2 + 2);
    this.tweens.add({
      targets: background,
      x: width / 2 + 14,
      y: height / 2 - 6,
      scale: coverScale * 1.12,
      duration: 18000,
      ease: 'Sine.easeInOut',
      yoyo: true,
      repeat: -1
    });

    this.add.rectangle(0, 0, width, height, 0x04070b, 0.34).setOrigin(0);
    this.add.rectangle(0, 0, width, height, 0x05080c, 0.16).setOrigin(0);
    this.add.rectangle(0, height - 220, width, 220, 0x05070a, 0.64).setOrigin(0);

    const completedBattles = Object.keys(campaign.battleHistory).length;
    const titleY = Math.max(96, height * 0.18);

    this.add.text(width / 2, titleY, '북벌의 끝과 남은 뜻', {
      fontFamily: '"Malgun Gothic", "Noto Sans KR", serif',
      fontSize: '48px',
      color: '#f6e6bd',
      fontStyle: '700',
      align: 'center',
      shadow: { offsetX: 0, offsetY: 3, color: '#020408', blur: 8, fill: true }
    }).setOrigin(0.5);

    this.add.text(width / 2, titleY + 62, '촉한 군영 후일담 완료', {
      fontFamily: '"Malgun Gothic", "Noto Sans KR", sans-serif',
      fontSize: '22px',
      color: '#d8b15f',
      fontStyle: '700',
      align: 'center',
      shadow: { offsetX: 0, offsetY: 2, color: '#020408', blur: 6, fill: true }
    }).setOrigin(0.5);

    const summary = [
      `완료 전투 ${completedBattles}개`,
      `최종 전장 ${latestBattleTitle}`,
      `합류 무장 ${campaign.roster.length}명`,
      `군영 공명 ${campaign.bonds.length}개`
    ];

    const startX = width / 2 - 390;
    summary.forEach((line, index) => {
      this.add.text(startX + index * 260, height - 178, line, {
        fontFamily: '"Malgun Gothic", "Noto Sans KR", sans-serif',
        fontSize: '18px',
        color: '#f2e3bf',
        fontStyle: '700',
        shadow: { offsetX: 0, offsetY: 2, color: '#020408', blur: 5, fill: true }
      }).setOrigin(0.5);
    });

    this.add.text(width / 2, height - 122, '도원에서 시작된 선택은 촉한의 깃발과 북벌의 장부를 지나, 다음 세대가 이어 받을 뜻으로 남았습니다.', {
      fontFamily: '"Malgun Gothic", "Noto Sans KR", serif',
      fontSize: '22px',
      color: '#e8dfca',
      align: 'center',
      wordWrap: { width: Math.min(920, width - 160), useAdvancedWrap: true },
      lineSpacing: 8,
      shadow: { offsetX: 0, offsetY: 2, color: '#020408', blur: 6, fill: true }
    }).setOrigin(0.5);

    this.addButton(width / 2, height - 52, '타이틀로', () => {
      soundDirector.playSelect();
      this.scene.start('TitleScene');
    });

    this.input.keyboard?.on('keydown-ENTER', () => this.scene.start('TitleScene'));
    this.input.keyboard?.on('keydown-SPACE', () => this.scene.start('TitleScene'));
    soundDirector.playMusic('oath-theme');
  }

  private addButton(x: number, y: number, label: string, action: () => void) {
    const bg = this.add.rectangle(x, y, 160, 42, 0x1a2630, 0.96);
    bg.setStrokeStyle(1, palette.gold, 0.82);
    bg.setInteractive({ useHandCursor: true });
    bg.on('pointerover', () => bg.setFillStyle(0x283947, 0.98));
    bg.on('pointerout', () => bg.setFillStyle(0x1a2630, 0.96));
    bg.on('pointerdown', action);

    const text = this.add.text(x, y, label, {
      fontFamily: '"Malgun Gothic", "Noto Sans KR", sans-serif',
      fontSize: '17px',
      color: '#f2e3bf',
      fontStyle: '700'
    });
    text.setOrigin(0.5);
    text.setInteractive({ useHandCursor: true });
    text.on('pointerdown', action);
  }
}