"use server";

// xuchao: 数学每周检测判分(同英语 takeWeekly,打卡联动数学)
import { revalidatePath } from "next/cache";
import { and, eq, sql } from "drizzle-orm";
import { getSessionUser } from "@/lib/auth";
import { gradeAnswers, type AnswerValue } from "@/lib/grammar";
import { buildMathWeeklyQuestions, currentMathWeekKey, getMathWeeklyRecord } from "@/lib/math-weekly";
import { recordWrong } from "@/lib/wrongbook";
import { db } from "@/db";
import { taskInstances, mathWeeklyTest } from "@/db/schema";
import { todayStr } from "@/lib/dates";
import { awardRulePoints } from "@/lib/points";

export type MathWeeklyResult =
  | { score: number; passed: boolean; correct: number; total: number; detail: boolean[]; pointsEarned: number }
  | { error: string };

// 提交数学每周检测:判分、记录、错题入库、达标关联当日数学打卡
export async function takeMathWeekly(answers: AnswerValue[]): Promise<MathWeeklyResult> {
  const user = await getSessionUser();
  if (!user || user.role !== "child") return { error: "会话无效,请重新激活设备" };
  const wk = currentMathWeekKey();
  const existing = await getMathWeeklyRecord(user.id, wk);
  if (existing) return { error: "本周已完成数学检测,下周再来。" };

  const questions = await buildMathWeeklyQuestions(user.id, wk);
  if (questions.length === 0) return { error: "暂无可组卷的题目,先学几课吧。" };

  const g = gradeAnswers(questions, answers);
  questions.forEach((q, i) => {
    if (!g.detail[i]) void recordWrong(user.id, "mweekly", wk, `数学周检测 ${wk}`, q, answers[i]);
  });

  await db
    .insert(mathWeeklyTest)
    .values({
      childUserId: user.id,
      weekKey: wk,
      score: g.score,
      correct: g.correct,
      total: g.total,
      passed: g.passed,
      questions: JSON.stringify(questions),
    })
    .onDuplicateKeyUpdate({ set: { score: g.score, correct: g.correct, total: g.total, passed: g.passed } });

  // 达标关联当日数学打卡,并发积分(首次达标才发)
  let pointsEarned = 0;
  if (g.passed) {
    pointsEarned = await awardRulePoints(user.id, "math_weekly", `week-${wk}`, `数学周检测 ${wk}`);
    const today = todayStr();
    const title = `数学周检测 · ${wk}`;
    const [ex] = await db
      .select({ id: taskInstances.id, status: taskInstances.status })
      .from(taskInstances)
      .where(and(eq(taskInstances.childUserId, user.id), eq(taskInstances.date, today), eq(taskInstances.title, title)))
      .limit(1);
    if (ex) {
      if (ex.status !== "done")
        await db.update(taskInstances).set({ status: "done", doneAt: sql`CURRENT_TIMESTAMP` }).where(eq(taskInstances.id, ex.id));
    } else {
      await db.insert(taskInstances).values({
        childUserId: user.id,
        date: today,
        title,
        subject: "math",
        status: "done",
        doneAt: new Date(),
        sortOrder: 95,
      });
    }
  }

  revalidatePath("/math/weekly");
  revalidatePath("/kid");
  revalidatePath("/parent");
  revalidatePath("/wrongbook");
  revalidatePath("/points");
  return { ...g, pointsEarned };
}