"use client";

import { useMemo, useState } from "react";
import { CalendarCheck, Flame, MessageSquarePlus, PenLine, Star } from "lucide-react";
import { AdminSettingsGroup, AdminSettingsRow, AdminStepper } from "@/components/admin";
import ConfirmDialog from "@/components/ConfirmDialog";
import useUnsavedGuard from "@/hooks/useUnsavedGuard";
import { apiUpdateSiteSettings, type PublicSettings } from "@/lib/api";
import { toast } from "@/lib/toast";

/** 积分规则 8 键（0–100，后端按 0–100 裁剪） */
type PointsKeys = Pick<
  PublicSettings,
  | "points_checkin_base"
  | "points_streak_every_days"
  | "points_streak_bonus"
  | "points_post_reward"
  | "points_post_daily_cap"
  | "points_reply_reward"
  | "points_reply_daily_cap"
  | "points_recommend_reward"
>;

const POINTS_KEYS: (keyof PointsKeys)[] = [
  "points_checkin_base",
  "points_streak_every_days",
  "points_streak_bonus",
  "points_post_reward",
  "points_post_daily_cap",
  "points_reply_reward",
  "points_reply_daily_cap",
  "points_recommend_reward",
];

/** 管理员可配置的积分增长规则：签到基础分 / 连续签到加成 / 发帖奖励 / 回复奖励（各带每日上限）/ 推荐奖励 */
export default function EconomySettings({ initial }: { initial: PublicSettings }) {
  const pickInitial = (): PointsKeys =>
    Object.fromEntries(POINTS_KEYS.map((k) => [k, initial[k]])) as PointsKeys;

  const [form, setForm] = useState<PointsKeys>(pickInitial);
  const [saved, setSaved] = useState<PointsKeys>(pickInitial);
  const [saving, setSaving] = useState(false);
  const dirty = useMemo(() => POINTS_KEYS.some((k) => form[k] !== saved[k]), [form, saved]);
  const leave = useUnsavedGuard(dirty);

  const set = (k: keyof PointsKeys, v: number) => setForm((f) => ({ ...f, [k]: v }));

  const save = async () => {
    if (saving || !dirty) return;
    setSaving(true);
    try {
      const payload = Object.fromEntries(POINTS_KEYS.map((k) => [k, form[k]]));
      const res = await apiUpdateSiteSettings(payload);
      const next = Object.fromEntries(POINTS_KEYS.map((k) => [k, res[k]])) as PointsKeys;
      setForm(next);
      setSaved(next);
      toast("积分规则已保存", "ok");
    } catch (e) {
      toast(e instanceof Error ? e.message : "保存失败");
    } finally {
      setSaving(false);
    }
  };

  return (
    <div className="admin-settings-stack">
      <AdminSettingsGroup title="签到">
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <CalendarCheck size={15} /> 签到基础分
            </span>
          }
          hintBelow="每日首次签到固定获得的积分（0=关闭，上限 100）。"
        >
          <AdminStepper
            value={form.points_checkin_base}
            onChange={(v) => set("points_checkin_base", v)}
            min={0}
            max={100}
            unit="分"
            ariaLabel="签到基础分"
            disabled={saving}
          />
        </AdminSettingsRow>
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <Flame size={15} /> 连续签到触发天数
            </span>
          }
          hintBelow="连续签到每满 N 天额外发放一次加成（0=关闭，上限 100）。"
        >
          <AdminStepper
            value={form.points_streak_every_days}
            onChange={(v) => set("points_streak_every_days", v)}
            min={0}
            max={100}
            unit="天"
            ariaLabel="连续签到触发天数"
            disabled={saving}
          />
        </AdminSettingsRow>
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <Flame size={15} /> 连续签到加成
            </span>
          }
          hintBelow="触发加成时额外获得的积分（0=关闭，上限 100）；与触发天数配合使用。"
        >
          <AdminStepper
            value={form.points_streak_bonus}
            onChange={(v) => set("points_streak_bonus", v)}
            min={0}
            max={100}
            unit="分"
            ariaLabel="连续签到加成分值"
            disabled={saving}
          />
        </AdminSettingsRow>
      </AdminSettingsGroup>

      <AdminSettingsGroup title="发帖与回复">
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <PenLine size={15} /> 发帖奖励
            </span>
          }
          hintBelow="帖子发布成功后发放（0=关闭，上限 100）；仅公开可见的帖子计奖，删除不回追。"
        >
          <AdminStepper
            value={form.points_post_reward}
            onChange={(v) => set("points_post_reward", v)}
            min={0}
            max={100}
            unit="分"
            ariaLabel="发帖奖励分值"
            disabled={saving}
          />
        </AdminSettingsRow>
        <AdminSettingsRow
          label={<span className="inline-flex items-center gap-1.5">发帖奖励每日上限</span>}
          hintBelow="每人每天最多计奖的帖子数（0=不限，上限 100），防止刷分。"
        >
          <AdminStepper
            value={form.points_post_daily_cap}
            onChange={(v) => set("points_post_daily_cap", v)}
            min={0}
            max={100}
            unit="帖"
            ariaLabel="发帖奖励每日上限"
            disabled={saving}
          />
        </AdminSettingsRow>
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <MessageSquarePlus size={15} /> 回复奖励
            </span>
          }
          hintBelow="评论发布成功后发放（0=关闭，上限 100）；仅公开可见的评论计奖。"
        >
          <AdminStepper
            value={form.points_reply_reward}
            onChange={(v) => set("points_reply_reward", v)}
            min={0}
            max={100}
            unit="分"
            ariaLabel="回复奖励分值"
            disabled={saving}
          />
        </AdminSettingsRow>
        <AdminSettingsRow
          label={<span className="inline-flex items-center gap-1.5">回复奖励每日上限</span>}
          hintBelow="每人每天最多计奖的评论数（0=不限，上限 100），防止刷分。"
        >
          <AdminStepper
            value={form.points_reply_daily_cap}
            onChange={(v) => set("points_reply_daily_cap", v)}
            min={0}
            max={100}
            unit="条"
            ariaLabel="回复奖励每日上限"
            disabled={saving}
          />
        </AdminSettingsRow>
      </AdminSettingsGroup>

      <AdminSettingsGroup title="帖子推荐">
        <AdminSettingsRow
          label={
            <span className="inline-flex items-center gap-1.5">
              <Star size={15} /> 推荐奖励
            </span>
          }
          hintBelow="帖子被管理员推荐（加精）时，作者一次性获得该积分（0=关闭，上限 100）；推荐人为作者本人时不发放，同一帖子只发放一次。"
        >
          <AdminStepper
            value={form.points_recommend_reward}
            onChange={(v) => set("points_recommend_reward", v)}
            min={0}
            max={100}
            unit="分"
            ariaLabel="推荐奖励分值"
            disabled={saving}
          />
        </AdminSettingsRow>
      </AdminSettingsGroup>

      <div className="flex items-center gap-3">
        <button
          type="button"
          className="btn btn-primary btn-sm"
          disabled={saving || !dirty}
          onClick={() => void save()}
        >
          {saving ? "保存中…" : "保存积分规则"}
        </button>
        <span className="admin-settings-instant">
          {dirty ? "有未保存的修改" : "已保存的规则对后续签到/发帖/回复/推荐生效"}
        </span>
      </div>

      <ConfirmDialog
        open={leave.leaveOpen}
        title="有未保存的修改"
        message="离开后，当前尚未保存的积分规则修改会丢失。确定离开？"
        confirmLabel="离开"
        danger
        onCancel={leave.cancelLeave}
        onConfirm={leave.confirmLeave}
      />
    </div>
  );
}