import { Injectable, NotFoundException } from "@nestjs/common";
import { PrismaService } from "../prisma/prisma.service.js";
import { SentimentLedgerService } from "../relationship/sentiment-ledger.service.js";
import { EmotionService } from "../emotion/emotion.service.js";
import { TASK_LEDGER_EVENT, TASK_LEDGER_WEIGHT } from "./constants.js";

// J-5 任務與記憶、關係的迴路：完成／失敗誠實回報（引擎層），但角色演出可以是遺憾／得意的語氣。
@Injectable()
export class TaskFeedbackService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly sentimentLedger: SentimentLedgerService,
    private readonly emotion: EmotionService,
  ) {}

  async complete(taskId: string, now: Date = new Date()) {
    const task = await this.prisma.client.task.findUnique({ where: { id: taskId } });
    if (!task) {
      throw new NotFoundException(`任務不存在：${taskId}`);
    }
    await this.prisma.client.task.update({
      where: { id: taskId },
      data: { status: "COMPLETED", completedAt: now },
    });
    await this.sentimentLedger.recordEvent(
      task.characterId,
      task.userId,
      TASK_LEDGER_EVENT.COMPLETED,
      TASK_LEDGER_WEIGHT.COMPLETED,
      { now },
    );
    return this.prisma.client.task.findUnique({ where: { id: taskId } });
  }

  async fail(taskId: string, now: Date = new Date()) {
    const task = await this.prisma.client.task.findUnique({ where: { id: taskId } });
    if (!task) {
      throw new NotFoundException(`任務不存在：${taskId}`);
    }
    await this.prisma.client.task.update({ where: { id: taskId }, data: { status: "FAILED" } });
    // 誠實回報失敗（引擎層行為固定），負向偏誤已由 E-2 機制放大，不需要在這裡重複加權。
    await this.sentimentLedger.recordEvent(
      task.characterId,
      task.userId,
      TASK_LEDGER_EVENT.FAILED,
      TASK_LEDGER_WEIGHT.FAILED,
      { now },
    );
    return this.prisma.client.task.findUnique({ where: { id: taskId } });
  }

  // 觸發後被忽視（追擊次數已達門檻仍無回應）：輕微失落，且如實記錄一筆負向事件。
  async markIgnored(taskId: string, now: Date = new Date()) {
    const task = await this.prisma.client.task.findUnique({ where: { id: taskId } });
    if (!task) {
      throw new NotFoundException(`任務不存在：${taskId}`);
    }
    await this.sentimentLedger.recordEvent(
      task.characterId,
      task.userId,
      TASK_LEDGER_EVENT.IGNORED,
      TASK_LEDGER_WEIGHT.IGNORED,
      { now },
    );
    await this.emotion.processInput(task.characterId, "", {
      now,
      baselineSignal: { tag: "SAD", intensity: 0.3 },
    });
  }
}