import type {
  CreatorIntentReadiness,
  CustomWorldAgentStage,
  CustomWorldAssetCoverageSummary,
  CustomWorldDraftCardSummary,
  CustomWorldPendingClarification,
  EightAnchorContent,
} from '../../../packages/shared/src/contracts/customWorldAgent.js';
import {
  buildDraftSummaryFromIntent,
  buildDraftTitleFromIntent,
  type CustomWorldCreatorIntentRecord,
} from './customWorldAgentIntentExtractionService.js';
import { CustomWorldAgentQualityGateService } from './customWorldAgentQualityGateService.js';
import { rebuildRoleAssetCoverage } from './customWorldAgentRoleAssetStateService.js';
import type { CustomWorldAgentSessionRecord } from './customWorldAgentSessionStore.js';
import { CustomWorldAgentSuggestedActionService } from './customWorldAgentSuggestedActionService.js';
import { buildAnchorPackFromEightAnchorContent } from './eightAnchorCompatibilityService.js';
import { CustomWorldAgentDraftCompiler } from './customWorldAgentDraftCompiler.js';

export type CustomWorldAgentDerivedStatePatch = Partial<
  Pick<
    CustomWorldAgentSessionRecord,
    | 'currentTurn'
    | 'anchorContent'
    | 'progressPercent'
    | 'lastAssistantReply'
    | 'stage'
    | 'focusCardId'
    | 'creatorIntent'
    | 'creatorIntentReadiness'
    | 'anchorPack'
    | 'draftProfile'
    | 'pendingClarifications'
    | 'suggestedActions'
    | 'recommendedReplies'
    | 'draftCards'
    | 'qualityFindings'
    | 'assetCoverage'
  >
>;

export class CustomWorldAgentSnapshotBuilder {
  constructor(
    private readonly draftCompiler: CustomWorldAgentDraftCompiler,
    private readonly suggestedActionService: CustomWorldAgentSuggestedActionService,
    private readonly qualityGateService: CustomWorldAgentQualityGateService,
  ) {}

  // 把“草稿改动后需要重算哪些派生字段”统一封装成一个入口，避免每个 action 都重复拼 patch。
  buildRefiningState(params: {
    previousStage: CustomWorldAgentStage;
    draftProfile: Record<string, unknown>;
    draftCards?: CustomWorldDraftCardSummary[];
    assetCoverage?: CustomWorldAssetCoverageSummary;
    nextStage?: Extract<
      CustomWorldAgentStage,
      | 'object_refining'
      | 'visual_refining'
      | 'long_tail_review'
      | 'ready_to_publish'
    >;
    focusCardId?: string | null;
  }): CustomWorldAgentDerivedStatePatch {
    const nextDraftCards =
      params.draftCards ?? this.draftCompiler.compileDraftCards(params.draftProfile);
    const assetCoverage =
      params.assetCoverage ?? rebuildRoleAssetCoverage(params.draftProfile);
    const nextStage =
      params.nextStage ??
      (params.previousStage === 'visual_refining'
        ? 'visual_refining'
        : params.previousStage === 'long_tail_review'
          ? 'long_tail_review'
          : params.previousStage === 'ready_to_publish'
            ? 'ready_to_publish'
        : 'object_refining');

    return {
      stage: nextStage,
      draftProfile: params.draftProfile,
      draftCards: nextDraftCards,
      assetCoverage,
      qualityFindings: this.qualityGateService.buildQualityFindings({
        draftProfile: params.draftProfile,
        assetCoverage,
        stage: nextStage,
      }),
      focusCardId: params.focusCardId,
      suggestedActions: this.suggestedActionService.buildSuggestedActions({
        stage: nextStage,
        isReady: true,
        draftProfile: params.draftProfile,
        draftCards: nextDraftCards,
      }),
      recommendedReplies: [],
    };
  }

  buildFoundationDraftState(params: {
    creatorIntent: Record<string, unknown> | null;
    anchorPack: Record<string, unknown> | null;
    draftProfile: Record<string, unknown>;
    assetCoverage?: CustomWorldAssetCoverageSummary;
  }): CustomWorldAgentDerivedStatePatch {
    return {
      ...this.buildRefiningState({
        previousStage: 'object_refining',
        nextStage: 'object_refining',
        draftProfile: params.draftProfile,
        assetCoverage: params.assetCoverage,
      }),
      creatorIntent: params.creatorIntent,
      anchorPack: params.anchorPack,
      pendingClarifications: [],
    };
  }

  buildMessageTurnState(params: {
    latestSession: CustomWorldAgentSessionRecord;
    nextAnchorContent: EightAnchorContent;
    progressPercent: number;
    replyText: string;
    nextCreatorIntent: CustomWorldCreatorIntentRecord;
    creatorIntentReadiness: CreatorIntentReadiness;
    derivedDraftProfile: {
      title: string;
      summary: string;
    };
    derivedPendingClarifications: CustomWorldPendingClarification[];
    derivedStage: CustomWorldAgentStage;
    shouldStayInDraftStage: boolean;
  }): CustomWorldAgentDerivedStatePatch {
    const preservedStage =
      params.latestSession.stage === 'visual_refining'
        ? ('visual_refining' as const)
        : ('object_refining' as const);
    const nextDraftProfile = params.shouldStayInDraftStage
      ? ((params.latestSession.draftProfile ?? {}) as Record<string, unknown>)
      : params.progressPercent >= 100
        ? {
            title: buildDraftTitleFromIntent(params.nextCreatorIntent),
            summary: buildDraftSummaryFromIntent(params.nextCreatorIntent),
          }
        : params.derivedDraftProfile;
    const nextStage = params.shouldStayInDraftStage
      ? preservedStage
      : params.derivedStage;
    const assetCoverage = params.shouldStayInDraftStage
      ? params.latestSession.assetCoverage
      : rebuildRoleAssetCoverage(nextDraftProfile);

    return {
      currentTurn: params.latestSession.currentTurn + 1,
      anchorContent: params.nextAnchorContent,
      progressPercent: params.progressPercent,
      lastAssistantReply: params.replyText,
      stage: nextStage,
      focusCardId: params.shouldStayInDraftStage
        ? params.latestSession.focusCardId
        : null,
      creatorIntent: params.nextCreatorIntent,
      creatorIntentReadiness: params.creatorIntentReadiness,
      anchorPack: buildAnchorPackFromEightAnchorContent(
        params.nextAnchorContent,
        params.progressPercent,
      ),
      draftProfile: nextDraftProfile,
      draftCards: params.shouldStayInDraftStage
        ? params.latestSession.draftCards
        : [],
      assetCoverage,
      qualityFindings: this.qualityGateService.buildQualityFindings({
        draftProfile: nextDraftProfile,
        assetCoverage,
        stage: nextStage,
      }),
      pendingClarifications:
        params.progressPercent >= 100 ? [] : params.derivedPendingClarifications,
      suggestedActions: params.shouldStayInDraftStage
        ? this.suggestedActionService.buildSuggestedActions({
            stage: preservedStage,
            isReady: true,
            draftProfile: params.latestSession.draftProfile,
            draftCards: params.latestSession.draftCards,
          })
        : params.progressPercent >= 100
          ? [
              {
                id: 'draft_foundation',
                type: 'draft_foundation',
                label: '生成游戏设定草稿',
              },
            ]
          : [],
      recommendedReplies: [],
    };
  }
}