import { Injectable } from "@nestjs/common";
import { PrismaService } from "../prisma/prisma.service.js";
import { BUILD_THRESHOLD_SCENES, BUILD_THRESHOLD_NAMED_LINES, BUILD_THRESHOLD_INTERACTIONS } from "./constants.js";

export interface RosterProgress {
  characterId: string;
  sceneCount: number;
  namedLineCount: number;
  interactionCount: number;
  meetsThreshold: boolean;
}

// M-2 作品名冊與建置門檻：新角色先進候補狀態，資料照常在場景資料庫累積，達門檻才正式建置。
// 累積量一律即時查詢（場景/台詞/互動紀錄本身就是唯一真相），不維護額外的計數快取，避免同步漂移。
@Injectable()
export class WorkRosterService {
  constructor(private readonly prisma: PrismaService) {}

  async getProgress(characterId: string): Promise<RosterProgress> {
    const [sceneCount, namedLineCount, interactionCount] = await Promise.all([
      this.prisma.client.scenePresence.count({ where: { characterId } }),
      this.prisma.client.sceneLine.count({ where: { speakerCharacterId: characterId, status: "CONFIRMED" } }),
      this.prisma.client.characterRelationshipEventLog.count({ where: { characterId } }),
    ]);
    return {
      characterId,
      sceneCount,
      namedLineCount,
      interactionCount,
      meetsThreshold:
        sceneCount >= BUILD_THRESHOLD_SCENES &&
        namedLineCount >= BUILD_THRESHOLD_NAMED_LINES &&
        interactionCount >= BUILD_THRESHOLD_INTERACTIONS,
    };
  }

  // 匯入場景後對每個候補角色呼叫：達門檻就自動升級為正式建置，之後的匯入走「強化路徑」（不需要特別的程式碼分支
  // ——強化與候補累積本來就是同一組寫入邏輯，差別只在 buildStatus 這個查詢結果）。
  async checkAndPromote(characterId: string): Promise<boolean> {
    const character = await this.prisma.client.character.findUnique({ where: { id: characterId } });
    if (!character || character.buildStatus === "BUILT") {
      return false;
    }
    const progress = await this.getProgress(characterId);
    if (!progress.meetsThreshold) {
      return false;
    }
    await this.prisma.client.character.update({ where: { id: characterId }, data: { buildStatus: "BUILT" } });
    return true;
  }
}