/**
 * GeneratePage 步骤内容渲染
 * 步骤顺序（6步，Issue #1677 修正）：模板(1) → 素材(2) → 配音(3) → 标题(4) → 确认生成(5) → 封面(6)
 * 步骤4预览（Canvas 网格）与步骤5进度（批量渲染网格）由 GeneratePage 直接渲染在左侧大区域。
 */
import React from "react"
import type { EditingTemplate } from "@/api/editing-planner"
import type { EditPlanClip } from "@/api/template-editor"
import type { CoverConfig } from "../types/cover"
import type { TitleSettings } from "../types"
import Step1TemplateSelect from "../components/Step1TemplateSelect"
import Step2MaterialSelect from "../components/Step2MaterialSelect"
import Step3VoiceWithMode from "./Step3VoiceWithMode"
import Step4TitleSettings from "../components/Step4TitleSettings"
import Step6CoverSettings from "../components/Step6CoverSettings"
import BatchGenerationGrid from "./BatchGenerationGrid"
import type { BatchTaskState } from "../hooks/generate-video/useGenerationPolling"
import type { GeneratedVideo } from "@/api/template-editor"

export interface GenerateStepContentProps {
  currentStep: number
  /* 模板 */
  userTemplates: EditingTemplate[]
  selectedTemplate: string
  onSelectTemplate: (id: string) => void
  /* 素材 */
  materialMode: "manual" | "auto"
  onMaterialModeChange: (mode: "manual" | "auto") => void
  selectedMaterials: string[]
  onSelectedMaterialsChange: (ids: string[]) => void
  smartSelectedIds: string[]
  onSmartSelectedIdsChange: (ids: string[]) => void
  /* 标题 */
  titleSettings: TitleSettings
  onTitleSettingsChange: (settings: TitleSettings) => void
  onUpdatePosition: (position: string) => void
  onUpdateFont: (font: string) => void
  onUpdateSize: (size: number) => void
  onToggleBold: () => void
  onToggleItalic: () => void
  onToggleStroke: () => void
  onToggleShadow: () => void
  onApplyPreset: (presetKey: string) => void
  activePreset: string | null
  titlePresets: { key: string; label: string; previewStyle: React.CSSProperties }[]
  /* 封面 */
  coverSettings: CoverConfig
  onCoverSettingsChange: (settings: CoverConfig) => void
  /* 配音 */
  selectedVoice: string
  onSelectedVoiceChange: (id: string) => void
  onServerClipsChange: (clips: EditPlanClip[]) => void
  /* 生成 */
  generating: boolean
  generated: boolean
  generateError: string | null
  progress: number
  generatedVideos: GeneratedVideo[]
  onRetry: () => void
  onRetryBatchTask: (taskId: string) => void
  onDismissError: () => void
  /** 批量：每个正式生成任务的独立状态（步骤5进度网格） */
  batchTasks: BatchTaskState[]
  /** BGM 开关 */
  bgm: boolean
  /** BGM 配置（来自模板） */
  bgmConfig?: { enabled: boolean; music_id?: string }
  /* ── 批量生成（#1677）── */
  previewCount: number
  previewTitles: string[]
  onPreviewTitlesChange: (titles: string[]) => void
  voiceModePerVideo: boolean
  onVoiceModePerVideoChange: (v: boolean) => void
  voiceLibraryIds: string[]
  onVoiceLibraryIdsChange: (ids: string[]) => void
  previewCovers: string[]
  onPreviewCoversChange: (urls: string[]) => void
  /** 批量模式勾选的变体索引（封面卡片按勾选顺序展示） */
  selectedVariantIds?: number[]
}

export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) => {
  const {
    currentStep,
    userTemplates,
    selectedTemplate,
    onSelectTemplate,
    materialMode,
    onMaterialModeChange,
    selectedMaterials,
    onSelectedMaterialsChange,
    smartSelectedIds,
    onSmartSelectedIdsChange,
    titleSettings,
    onTitleSettingsChange,
    onUpdatePosition,
    onUpdateFont,
    onUpdateSize,
    onToggleBold,
    onToggleItalic,
    onToggleStroke,
    onToggleShadow,
    onApplyPreset,
    activePreset,
    titlePresets,
    coverSettings,
    onCoverSettingsChange,
    selectedVoice,
    onSelectedVoiceChange,
    onServerClipsChange,
    generating,
    generated,
    generateError,
    progress,
    onRetry,
    generatedVideos,
    batchTasks,
    onRetryBatchTask,
    previewCount,
    previewTitles,
    onPreviewTitlesChange,
    voiceModePerVideo,
    onVoiceModePerVideoChange,
    voiceLibraryIds,
    onVoiceLibraryIdsChange,
    previewCovers,
    onPreviewCoversChange,
    selectedVariantIds,
  } = props

  /* 当前模板的 segments，传给 Step2 构建 clips */
  const currentTemplate = userTemplates.find((t) => t.id === selectedTemplate)
  const templateSegments = currentTemplate?.segments

  switch (currentStep) {
    case 1:
      return (
        <Step1TemplateSelect
          templates={userTemplates}
          selectedTemplate={selectedTemplate}
          onSelectTemplate={onSelectTemplate}
        />
      )
    case 2:
      return (
        <Step2MaterialSelect
          materialMode={materialMode}
          onMaterialModeChange={onMaterialModeChange}
          selectedMaterials={selectedMaterials}
          onSelectedMaterialsChange={onSelectedMaterialsChange}
          smartSelectedIds={smartSelectedIds}
          onSmartSelectedIdsChange={onSmartSelectedIdsChange}
          selectedTemplate={selectedTemplate}
          templateSegments={templateSegments}
          onServerClipsChange={onServerClipsChange}
        />
      )
    case 3:
      return (
        <Step3VoiceWithMode
          previewCount={previewCount}
          selectedVoice={selectedVoice}
          onSelectedVoiceChange={onSelectedVoiceChange}
          voiceModePerVideo={voiceModePerVideo}
          onVoiceModePerVideoChange={onVoiceModePerVideoChange}
          voiceLibraryIds={voiceLibraryIds}
          onVoiceLibraryIdsChange={onVoiceLibraryIdsChange}
        />
      )
    case 4:
      return (
        <Step4TitleSettings
          titleSettings={titleSettings}
          onTitleSettingsChange={onTitleSettingsChange}
          selectedTemplate={selectedTemplate}
          onUpdatePosition={onUpdatePosition}
          onUpdateFont={onUpdateFont}
          onUpdateSize={onUpdateSize}
          onToggleBold={onToggleBold}
          onToggleItalic={onToggleItalic}
          onToggleStroke={onToggleStroke}
          onToggleShadow={onToggleShadow}
          onApplyPreset={onApplyPreset}
          activePreset={activePreset}
          titlePresets={titlePresets}
          previewCount={previewCount}
          previewTitles={previewTitles}
          onPreviewTitlesChange={onPreviewTitlesChange}
        />
      )
    case 5:
      /* 确认生成页：批量=逐任务进度网格；单视频=进度状态卡（成片播放器在左侧大区域） */
      if (previewCount > 1) {
        return (
          <BatchGenerationGrid
            tasks={batchTasks}
            titles={previewTitles}
            onRetryTask={onRetryBatchTask}
          />
        )
      }
      /* 单视频：渲染进度 / 失败重试 / 完成提示（成片播放器在右侧栏） */
      return (
        <div className="xx-form-section">
          <h3>🎬 确认生成</h3>
          {generating && (
            <div className="xx-gen-progress-card">
              <div className="xx-gen-progress-header">
                <div className="xx-gen-progress-info">
                  <div className="xx-gen-progress-phase">
                    ⏳ 视频渲染中… {Math.round(progress)}%
                  </div>
                  <div className="xx-gen-progress-sub">
                    生成过程中可以切换到其他页面，完成后可在任务历史查看
                  </div>
                </div>
              </div>
              <div className="xx-gen-progress-bar">
                <div
                  className="xx-gen-progress-bar-fill"
                  style={{ width: `${Math.min(Math.round(progress), 100)}%` }}
                />
              </div>
            </div>
          )}
          {generateError && !generating && (
            <div className="xx-gen-error-card">
              <div className="xx-gen-error-info">
                <div className="xx-gen-error-title">生成失败</div>
                <div className="xx-gen-error-msg">{generateError}</div>
              </div>
              <button type="button" className="xx-btn xx-btn-primary xx-btn-sm" onClick={onRetry}>
                🔄 重试
              </button>
            </div>
          )}
          {generated && !generating && (
            <div className="xx-gen-success-card">
              <div className="xx-gen-success-info">
                <div className="xx-gen-success-title">✅ 视频生成完成！</div>
                <div className="xx-gen-success-sub">右侧可预览成片，点击「下一步」选择封面</div>
              </div>
            </div>
          )}
        </div>
      )
    case 6:
      return (
        <Step6CoverSettings
          coverSettings={coverSettings}
          onCoverSettingsChange={onCoverSettingsChange}
          selectedTemplate={selectedTemplate}
          titleSettings={titleSettings}
          generatedVideos={generatedVideos}
          previewCount={previewCount}
          previewTitles={previewTitles}
          previewCovers={previewCovers}
          onPreviewCoversChange={onPreviewCoversChange}
          selectedVariantIndexes={selectedVariantIds}
        />
      )
    default:
      return null
  }
}

export default GenerateStepContent