import { Component, EventEmitter, Input, OnDestroy, Output } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { JimengService } from '../../services/jimeng.service';
import { PortraitPipelineService, PortraitPipelineResult } from '../../services/portrait-pipeline.service';

export type PortraitPrepareMode = 'raw' | 'benchmark';

export interface PortraitPrepareOutput {
  /** 最终用于数字人生成的形象图 URL（raw 模式则为空，调用方自行用原 file 上传） */
  portraitUrl: string;
  /** 中间产物：规范化全身图 URL（benchmark 模式才有值） */
  fullBodyUrl: string;
  /** 对标提示词文本（benchmark 模式才有值） */
  benchmarkSummary: string;
  /** 当前模式 */
  mode: PortraitPrepareMode;
}

/**
 * 数字人形象图准备子组件（v2，已移除全身图生成步骤）：
 *  - raw：直接使用上传图（不调用 AI）
 *  - benchmark：上传参考图 + Gemini 反推姿态/场景 + jimeng-img-v4 人物替换
 *               （用上传形象图中的人物替换参考图中的人物，保留参考图姿态/场景）
 *
 * 仅在 selfieFile 存在时才显示模式切换 UI。
 */
@Component({
  selector: 'app-portrait-prepare',
  standalone: true,
  imports: [CommonModule, FormsModule],
  template: `
    <div class="pp-container" *ngIf="selfieFile">
      <label class="pp-label">形象图准备方式</label>

      <div class="pp-mode-grid">
        <div class="pp-mode-card"
             [class.active]="mode === 'raw'"
             [class.disabled]="running"
             (click)="setMode('raw')">
          <div class="pp-mode-title">直接使用上传图</div>
          <div class="pp-mode-desc">沿用原始上传的人物形象图，不做 AI 处理。</div>
        </div>
        <div class="pp-mode-card"
             [class.active]="mode === 'benchmark'"
             [class.disabled]="running"
             (click)="setMode('benchmark')">
          <div class="pp-mode-title">参考图人物替换</div>
          <div class="pp-mode-desc">上传参考图，用您上传形象图中的人物替换参考图人物，保留参考图的姿态、动作与场景。</div>
        </div>
      </div>

      <!-- 参考图（提供姿态/场景）上传 -->
      <div *ngIf="mode === 'benchmark'" class="pp-benchmark">
        <label class="pp-label-sub">参考图（提供姿态、动作与场景）</label>
        <input type="file"
               #benchmarkInput
               accept="image/jpeg,image/png,image/jpg,image/gif,image/webp,.jpg,.jpeg,.png,.gif,.webp"
               (change)="onBenchmarkSelected($event)"
               style="display:none">

        <div class="pp-empty" *ngIf="!benchmarkPreviewUrl">
          <svg class="pp-svg pp-svg-lg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
            <rect x="3" y="3" width="18" height="18" rx="2"/>
            <circle cx="8.5" cy="10" r="1.5"/>
            <path d="M21 15l-5-5L5 21"/>
          </svg>
          <div class="pp-empty-text">上传一张参考图（含人物 + 背景）</div>
          <button class="pp-btn pp-btn-primary" type="button" (click)="benchmarkInput.click()" [disabled]="running">
            <svg class="pp-svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
              <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/>
              <polyline points="17 8 12 3 7 8"/>
              <line x1="12" y1="3" x2="12" y2="15"/>
            </svg>
            选择参考图
          </button>
        </div>

        <div class="pp-preview" *ngIf="benchmarkPreviewUrl">
          <img [src]="benchmarkPreviewUrl" [alt]="benchmarkFileName">
          <div class="pp-preview-meta">
            <div class="pp-preview-name">{{benchmarkFileName}}</div>
            <button class="pp-btn pp-btn-ghost" type="button" (click)="clearBenchmark()" [disabled]="running">
              <svg class="pp-svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                <polyline points="3 6 5 6 21 6"/>
                <path d="M19 6l-2 14a2 2 0 0 1-2 2H9a2 2 0 0 1-2-2L5 6"/>
                <path d="M10 11v6M14 11v6"/>
              </svg>
              移除
            </button>
          </div>
        </div>
      </div>

      <!-- 生成按钮 + 进度 -->
      <div *ngIf="mode === 'benchmark'" class="pp-action">
        <button class="pp-btn pp-btn-primary" type="button"
                (click)="run()"
                [disabled]="running || !benchmarkFile">
          <svg class="pp-svg" [class.spinning]="running" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <ng-container *ngIf="!running">
              <path d="M9.937 15.5A2 2 0 0 0 8.5 14.063l-6.135-1.582a.5.5 0 0 1 0-.962L8.5 9.936A2 2 0 0 0 9.937 8.5l1.582-6.135a.5.5 0 0 1 .963 0L14.063 8.5A2 2 0 0 0 15.5 9.937l6.135 1.582a.5.5 0 0 1 0 .962L15.5 14.063a2 2 0 0 0-1.437 1.437l-1.582 6.135a.5.5 0 0 1-.963 0z"/>
            </ng-container>
            <ng-container *ngIf="running">
              <path d="M21 12a9 9 0 1 1-6.219-8.56"/>
            </ng-container>
          </svg>
          {{running ? '生成中...' : (generatedPortraitUrl ? '重新生成' : '生成形象图')}}
        </button>
        <button class="pp-btn pp-btn-ghost" type="button" *ngIf="generatedPortraitUrl && !running" (click)="reset()">
          <svg class="pp-svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <polyline points="23 4 23 10 17 10"/>
            <polyline points="1 20 1 14 7 14"/>
            <path d="M3.51 9a9 9 0 0 1 14.85-3.36L23 10M1 14l4.64 4.36A9 9 0 0 0 20.49 15"/>
          </svg>
          清除结果
        </button>
        <span class="pp-hint">jimeng-img-v4 + Gemini</span>
      </div>

      <div class="pp-status" *ngIf="running || statusText">
        <svg class="pp-svg" [class.spinning]="running" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"
             [style.color]="running ? 'var(--accent-color, #3b82f6)' : 'var(--success-color, #10b981)'">
          <ng-container *ngIf="running">
            <path d="M21 12a9 9 0 1 1-6.219-8.56"/>
          </ng-container>
          <ng-container *ngIf="!running">
            <circle cx="12" cy="12" r="10"/>
            <polyline points="9 12 11 14 15 10"/>
          </ng-container>
        </svg>
        <div class="pp-status-body">
          <div class="pp-status-text">{{statusText}}</div>
          <div class="pp-status-bar" [class.pp-status-bar--indeterminate]="running && progress < 5"><div class="pp-status-bar__fill" [style.width]="progress + '%'"></div></div>
        </div>
        <div class="pp-status-pct">{{progress}}%</div>
      </div>

      <div class="pp-error" *ngIf="errorText">{{errorText}}</div>

      <!-- 生成结果对比预览 -->
      <div class="pp-result" *ngIf="generatedPortraitUrl">
        <div class="pp-result-row">
          <div class="pp-result-cell">
            <div class="pp-result-cap">原图</div>
            <img [src]="selfiePreviewUrl" alt="原图">
          </div>
          <div class="pp-result-cell" *ngIf="benchmarkPreviewUrl">
            <div class="pp-result-cap">参考图（姿态/场景）</div>
            <img [src]="benchmarkPreviewUrl" alt="参考图">
          </div>
          <div class="pp-result-cell">
            <div class="pp-result-cap pp-result-cap-success">✨ 人物替换后形象图（将用于数字人）</div>
            <img [src]="generatedPortraitUrl" alt="生成形象图" class="pp-result-img-final">
          </div>
        </div>
        <div class="pp-summary" *ngIf="generatedSummary">
          <strong>参考图姿态提示词：</strong>{{generatedSummary}}
        </div>
      </div>
    </div>
  `,
  styles: [`
    :host { display: block; }
    .pp-container { display: flex; flex-direction: column; gap: 10px; }
    .pp-label { font-size: 13px; font-weight: 600; color: var(--text-primary, #e5e7eb); }
    .pp-label-sub { font-size: 12.5px; color: var(--text-secondary, #9ca3af); display: block; margin-bottom: 6px; }

    /* 模式卡片 */
    .pp-mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
    .pp-mode-card {
      padding: 10px 12px; border: 1px solid var(--border-color, rgba(255,255,255,0.1));
      border-radius: 10px; cursor: pointer; transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
      background: rgba(255,255,255,0.02);
    }
    .pp-mode-card:hover:not(.disabled) { border-color: var(--accent-color, #3b82f6); background: rgba(59,130,246,0.06); }
    .pp-mode-card.active {
      border-color: var(--accent-color, #3b82f6);
      background: linear-gradient(135deg, rgba(59,130,246,0.10), rgba(168,85,247,0.10));
      box-shadow: 0 0 0 1px var(--accent-color, #3b82f6) inset;
    }
    .pp-mode-card.disabled { opacity: 0.5; cursor: not-allowed; }
    .pp-mode-title { font-size: 13px; font-weight: 600; margin-bottom: 3px; color: var(--text-primary, #e5e7eb); }
    .pp-mode-desc { font-size: 11.5px; color: var(--text-muted, #9ca3af); line-height: 1.45; }

    /* 参考图上传 */
    .pp-benchmark { margin-top: 2px; }
    .pp-empty {
      padding: 14px; border: 1.5px dashed var(--border-color, rgba(255,255,255,0.15)); border-radius: 10px;
      display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center;
      background: rgba(255,255,255,0.015);
    }
    .pp-empty-text { font-size: 12px; color: var(--text-muted, #9ca3af); }
    .pp-preview {
      display: flex; gap: 10px; align-items: center; padding: 8px;
      background: rgba(255,255,255,0.04); border-radius: 10px;
      border: 1px solid var(--border-color, rgba(255,255,255,0.08));
    }
    .pp-preview img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; flex-shrink: 0; }
    .pp-preview-meta { flex: 1; display: flex; justify-content: space-between; align-items: center; gap: 8px; min-width: 0; }
    .pp-preview-name {
      font-size: 12px; font-weight: 500; color: var(--text-primary, #e5e7eb);
      overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    }

    /* 按钮 —— 使用 button.xxx 提升具体性，避免被全局 .btn / button:hover 覆盖 */
    button.pp-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 7px 12px; border-radius: 8px; font-size: 12.5px; font-weight: 500;
      border: 1px solid var(--border-color, rgba(255,255,255,0.12));
      background: rgba(99, 102, 241, 0.10);
      color: var(--text-primary, #1f2937);
      cursor: pointer; transition: background 0.15s, box-shadow 0.15s, transform 0.15s, border-color 0.15s;
      white-space: nowrap;
    }
    button.pp-btn:hover:not(:disabled) {
      background: rgba(99, 102, 241, 0.18);
      border-color: rgba(99, 102, 241, 0.45);
      transform: translateY(-1px);
    }
    button.pp-btn:disabled { opacity: 0.5; cursor: not-allowed; }

    button.pp-btn-primary {
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      border-color: transparent;
      color: #ffffff;
      box-shadow: 0 2px 8px rgba(59,130,246,0.3);
    }
    button.pp-btn-primary:hover:not(:disabled) {
      background: linear-gradient(135deg, #2563eb, #7c3aed);
      border-color: transparent;
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(59,130,246,0.5);
      transform: translateY(-1px);
    }
    button.pp-btn-primary:active:not(:disabled) {
      background: linear-gradient(135deg, #1d4ed8, #6d28d9);
      transform: translateY(0);
    }

    button.pp-btn-ghost {
      background: transparent;
      border-color: var(--border-color, rgba(0,0,0,0.12));
      color: var(--text-primary, #1f2937);
    }
    button.pp-btn-ghost:hover:not(:disabled) {
      background: rgba(0,0,0,0.04);
      border-color: rgba(0,0,0,0.2);
    }

    /* 动作区 */
    .pp-action { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
    .pp-hint { font-size: 11px; color: var(--text-muted, #6b7280); margin-left: auto; }

    /* 状态条 */
    .pp-status {
      display: flex; align-items: center; gap: 10px; padding: 8px 10px;
      background: rgba(255,255,255,0.04); border-radius: 8px;
      border: 1px solid var(--border-color, rgba(255,255,255,0.08));
    }
    .pp-status-body { flex: 1; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
    .pp-status-text { font-size: 12px; color: var(--text-primary, #e5e7eb); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .pp-status-bar { position: relative; height: 4px; background: rgba(99,102,241,0.12); border-radius: 2px; overflow: hidden; }
    .pp-status-bar__fill {
      height: 100%;
      background: linear-gradient(90deg, #3b82f6, #8b5cf6);
      transition: width 0.3s ease;
    }
    /* 上传阶段（progress<5）显示流动条纹，避免视觉上静止 */
    .pp-status-bar--indeterminate::after {
      content: '';
      position: absolute; inset: 0;
      background: linear-gradient(90deg,
        transparent 0%,
        rgba(139, 92, 246, 0.6) 50%,
        transparent 100%);
      animation: pp-indeterminate 1.2s linear infinite;
    }
    @keyframes pp-indeterminate {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(100%); }
    }
    .pp-status-pct { font-size: 11.5px; font-weight: 600; color: var(--accent-color, #3b82f6); flex-shrink: 0; }

    .pp-error {
      padding: 8px 10px; background: rgba(220, 38, 38, 0.08);
      color: #ef4444; border-radius: 8px; font-size: 12px;
      border: 1px solid rgba(220, 38, 38, 0.25);
    }

    /* 结果对比 */
    .pp-result {
      display: flex; flex-direction: column; gap: 8px; padding: 10px;
      background: rgba(255,255,255,0.03); border-radius: 10px;
      border: 1px solid var(--border-color, rgba(255,255,255,0.08));
    }
    .pp-result-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .pp-result-cell { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
    .pp-result-cap { font-size: 11px; color: var(--text-muted, #9ca3af); }
    .pp-result-cap-success { color: #10b981; font-weight: 600; }
    .pp-result-cell img {
      width: 100%; aspect-ratio: 4/5; object-fit: cover;
      border-radius: 6px; background: rgba(0,0,0,0.2);
    }
    .pp-result-img-final { box-shadow: 0 0 0 2px #10b981; }
    .pp-summary {
      font-size: 11.5px; color: var(--text-muted, #9ca3af); padding: 8px 10px;
      background: rgba(0,0,0,0.15); border-radius: 6px; line-height: 1.5;
    }
    .pp-summary strong { color: var(--text-primary, #e5e7eb); }

    /* SVG 图标 */
    .pp-svg { width: 14px; height: 14px; flex-shrink: 0; }
    .pp-svg-lg { width: 28px; height: 28px; color: var(--text-muted, #6b7280); }
    .pp-svg.spinning { animation: pp-spin 1s linear infinite; }
    @keyframes pp-spin { to { transform: rotate(360deg); } }

    /* 窄列适配（在 dh-step-col 280px 列宽下） */
    @media (max-width: 1280px) {
      .pp-mode-grid { grid-template-columns: 1fr; }
      .pp-result-row { grid-template-columns: 1fr; }
      .pp-result-cell img { aspect-ratio: auto; max-height: 180px; }
    }
  `]
})
export class PortraitPrepareComponent implements OnDestroy {
  /** 用户上传的自拍/形象图 File（必填） */
  @Input() selfieFile: File | null = null;
  /** 自拍预览 URL（用于对比展示） */
  @Input() selfiePreviewUrl: string = '';

  /** 当模式或生成结果变化时通知父组件 */
  @Output() prepared = new EventEmitter<PortraitPrepareOutput>();

  mode: PortraitPrepareMode = 'raw';

  benchmarkFile: File | null = null;
  benchmarkFileName: string = '';
  benchmarkPreviewUrl: string = '';

  running: boolean = false;
  statusText: string = '';
  progress: number = 0;
  errorText: string = '';

  generatedPortraitUrl: string = '';
  generatedFullBodyUrl: string = '';
  generatedSummary: string = '';

  // 已上传过的 selfie/benchmark URL，避免重复上传
  private cachedSelfieUrl: string = '';
  private cachedBenchmarkUrl: string = '';
  private cachedSelfieFile: File | null = null;
  private cachedBenchmarkFile: File | null = null;

  constructor(
    private jimeng: JimengService,
    private portraitPipeline: PortraitPipelineService
  ) {}

  ngOnDestroy(): void {
    this.revokeBenchmarkPreview();
  }

  setMode(mode: PortraitPrepareMode): void {
    if (this.running) return;
    this.mode = mode;
    this.generatedPortraitUrl = '';
    this.generatedFullBodyUrl = '';
    this.generatedSummary = '';
    this.statusText = '';
    this.progress = 0;
    this.errorText = '';
    if (mode !== 'benchmark') {
      this.clearBenchmark();
    }
    this.emitState();
  }

  onBenchmarkSelected(event: Event): void {
    const input = event.target as HTMLInputElement;
    if (!input.files || input.files.length === 0) return;

    const file = input.files[0];
    const allowedTypes = ['image/jpeg', 'image/png', 'image/jpg', 'image/gif', 'image/webp'];
    const ext = file.name.substring(file.name.lastIndexOf('.')).toLowerCase();
    const allowedExts = ['.jpg', '.jpeg', '.png', '.gif', '.webp'];

    if ((!allowedTypes.includes(file.type) && !allowedExts.includes(ext)) || file.size <= 0) {
      this.errorText = '对标场景图仅支持 jpg/jpeg/png/gif/webp 格式';
      input.value = '';
      return;
    }
    if (file.size > 20 * 1024 * 1024) {
      this.errorText = '对标场景图大小不能超过 20MB';
      input.value = '';
      return;
    }

    this.revokeBenchmarkPreview();
    this.benchmarkFile = file;
    this.benchmarkFileName = file.name;
    this.benchmarkPreviewUrl = URL.createObjectURL(file);
    this.errorText = '';
    this.generatedPortraitUrl = '';
    this.cachedBenchmarkUrl = '';
    this.cachedBenchmarkFile = null;
    input.value = '';
    this.emitState();
  }

  clearBenchmark(): void {
    this.revokeBenchmarkPreview();
    this.benchmarkFile = null;
    this.benchmarkFileName = '';
    this.cachedBenchmarkUrl = '';
    this.cachedBenchmarkFile = null;
  }

  reset(): void {
    if (this.running) return;
    this.generatedPortraitUrl = '';
    this.generatedFullBodyUrl = '';
    this.generatedSummary = '';
    this.statusText = '';
    this.progress = 0;
    this.errorText = '';
    this.emitState();
  }

  run(): void {
    if (this.running) return;
    if (!this.selfieFile) {
      this.errorText = '请先上传人物自拍/形象图';
      return;
    }
    if (this.mode === 'benchmark' && !this.benchmarkFile) {
      this.errorText = '请上传一张对标账号的场景图';
      return;
    }

    this.running = true;
    this.errorText = '';
    this.progress = 1;
    this.statusText = '正在上传形象图...';

    // Step 1：上传自拍（带缓存）
    this.ensureUrl(this.selfieFile, this.cachedSelfieFile, this.cachedSelfieUrl, 'portrait-selfie').then((selfieUrl) => {
      this.cachedSelfieFile = this.selfieFile;
      this.cachedSelfieUrl = selfieUrl;
      this.progress = 2;
      this.statusText = this.benchmarkFile ? '正在上传参考图...' : '形象图上传完成';

      // Step 2：上传对标图（带缓存，benchmark 模式才需要）
      const benchmarkPromise: Promise<string | null> = this.benchmarkFile
        ? this.ensureUrl(this.benchmarkFile, this.cachedBenchmarkFile, this.cachedBenchmarkUrl, 'portrait-benchmark').then((url) => {
            this.cachedBenchmarkFile = this.benchmarkFile;
            this.cachedBenchmarkUrl = url;
            this.progress = 4;
            this.statusText = '素材上传完成，准备分析...';
            return url;
          })
        : Promise.resolve(null);

      return benchmarkPromise.then((benchmarkUrl) => ({ selfieUrl, benchmarkUrl }));
    }).then(({ selfieUrl, benchmarkUrl }) => {
      // Step 3：执行 pipeline
      this.portraitPipeline.buildBenchmarkedPortrait(selfieUrl, benchmarkUrl, (status, progress) => {
        this.statusText = status;
        this.progress = Math.round(progress);
      }).subscribe({
        next: (result: PortraitPipelineResult) => {
          this.generatedFullBodyUrl = result.fullBodyUrl;
          this.generatedPortraitUrl = result.finalPortraitUrl;
          this.generatedSummary = result.benchmarkPrompt?.merged || '';
          this.running = false;
          this.statusText = '形象图生成完成';
          this.progress = 100;
          this.emitState();
        },
        error: (err) => {
          this.running = false;
          this.errorText = this.getErrorText(err, '形象图生成失败');
          this.emitState();
        }
      });
    }).catch((err) => {
      this.running = false;
      this.errorText = this.getErrorText(err, '素材上传失败');
      this.emitState();
    });
  }

  private ensureUrl(file: File, cachedFile: File | null, cachedUrl: string, prefix: string): Promise<string> {
    if (cachedUrl && cachedFile === file) {
      return Promise.resolve(cachedUrl);
    }
    return new Promise<string>((resolve, reject) => {
      this.jimeng.uploadFileToParse(
        file,
        `${prefix}-${Date.now()}-${file.name}`,
        file.type || 'image/jpeg'
      ).subscribe({
        next: (url: string) => resolve(url),
        error: (err) => reject(err)
      });
    });
  }

  private emitState(): void {
    this.prepared.emit({
      portraitUrl: this.generatedPortraitUrl,
      fullBodyUrl: this.generatedFullBodyUrl,
      benchmarkSummary: this.generatedSummary,
      mode: this.mode
    });
  }

  private revokeBenchmarkPreview(): void {
    if (this.benchmarkPreviewUrl) {
      URL.revokeObjectURL(this.benchmarkPreviewUrl);
      this.benchmarkPreviewUrl = '';
    }
  }

  private getErrorText(err: any, fallback: string): string {
    return err?.error?.message || err?.error?.error || err?.message || fallback;
  }
}