import { useEffect, useState } from "react";
import { toast } from "sonner";

import { useAuth } from "~/context/AuthContext";
import { Button } from "~/components/ui/button";
import { Input } from "~/components/ui/input";
import {
  formFieldClass,
  formHintClass,
  formInputClass,
  modalFormClass,
} from "~/features/platform/modalUi";
import { cn } from "~/lib/utils";

import {
  AppFormDialog,
  dialogPrimaryButtonClass,
  dialogSecondaryButtonClass,
} from "./AppFormDialog";

type AccountSettingsDialogProps = {
  open: boolean;
  onOpenChange: (open: boolean) => void;
};

type SettingsTab = "profile" | "password";

const TAB_ITEMS: Array<{ id: SettingsTab; label: string }> = [
  { id: "profile", label: "基本信息" },
  { id: "password", label: "修改密码" },
];

export function AccountSettingsDialog({
  open,
  onOpenChange,
}: AccountSettingsDialogProps) {
  const { user, updateProfile, changePassword, logout } = useAuth();
  const [tab, setTab] = useState<SettingsTab>("profile");
  const [displayName, setDisplayName] = useState("");
  const [email, setEmail] = useState("");
  const [savingProfile, setSavingProfile] = useState(false);
  const [currentPassword, setCurrentPassword] = useState("");
  const [newPassword, setNewPassword] = useState("");
  const [confirmPassword, setConfirmPassword] = useState("");
  const [savingPassword, setSavingPassword] = useState(false);

  useEffect(() => {
    if (!open || !user) return;
    setTab("profile");
    setDisplayName(user.display_name);
    setEmail(user.email ?? "");
    setCurrentPassword("");
    setNewPassword("");
    setConfirmPassword("");
  }, [open, user]);

  const handleSaveProfile = async (event: React.FormEvent) => {
    event.preventDefault();
    const trimmedName = displayName.trim();
    if (!trimmedName) {
      toast.error("显示名称不能为空");
      return;
    }
    setSavingProfile(true);
    try {
      await updateProfile({
        display_name: trimmedName,
        email: email.trim(),
      });
      toast.success("资料已更新");
      onOpenChange(false);
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "资料更新失败");
    } finally {
      setSavingProfile(false);
    }
  };

  const handleChangePassword = async (event: React.FormEvent) => {
    event.preventDefault();
    if (!currentPassword) {
      toast.error("请输入当前密码");
      return;
    }
    if (newPassword.length < 8 || newPassword.length > 72) {
      toast.error("新密码长度需为 8~72 字符");
      return;
    }
    if (newPassword !== confirmPassword) {
      toast.error("两次输入的新密码不一致");
      return;
    }
    if (newPassword === currentPassword) {
      toast.error("新密码不能与当前密码相同");
      return;
    }
    setSavingPassword(true);
    try {
      await changePassword({
        current_password: currentPassword,
        new_password: newPassword,
      });
      toast.success("密码已修改，请重新登录");
      onOpenChange(false);
      await logout();
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "密码修改失败");
    } finally {
      setSavingPassword(false);
    }
  };

  const formId =
    tab === "profile" ? "account-profile-form" : "account-password-form";
  const saving = tab === "profile" ? savingProfile : savingPassword;
  const primaryLabel =
    tab === "profile"
      ? savingProfile
        ? "保存中…"
        : "保存资料"
      : savingPassword
        ? "修改中…"
        : "修改密码";

  return (
    <AppFormDialog
      open={open}
      onOpenChange={onOpenChange}
      eyebrow="ACCOUNT"
      title="账号设置"
      size="panel"
      showCloseButton
      footer={
        <>
          <Button
            type="button"
            variant="outline"
            className={dialogSecondaryButtonClass}
            onClick={() => onOpenChange(false)}
            disabled={saving}
          >
            取消
          </Button>
          <Button
            type="submit"
            form={formId}
            disabled={saving}
            className={dialogPrimaryButtonClass}
          >
            {primaryLabel}
          </Button>
        </>
      }
    >
      <div className="border-b border-line px-[22px]">
        <div className="flex gap-1" role="tablist" aria-label="账号设置分区">
          {TAB_ITEMS.map((item) => {
            const active = tab === item.id;
            return (
              <button
                key={item.id}
                type="button"
                role="tab"
                aria-selected={active}
                className={cn(
                  "relative -mb-px cursor-pointer border-0 border-b-2 bg-transparent px-3 py-2.5 text-[12px] font-[650] outline-none transition-colors",
                  active
                    ? "border-[#2d82d4] text-[#1c5fa8]"
                    : "border-transparent text-[#6b7c8f] hover:text-[#3c4e62]",
                )}
                onClick={() => setTab(item.id)}
              >
                {item.label}
              </button>
            );
          })}
        </div>
      </div>

      <div className={`${modalFormClass} pb-5`}>
        {tab === "profile" ? (
          <form
            id={formId}
            onSubmit={(event) => void handleSaveProfile(event)}
          >
            <label className={formFieldClass}>
              <span>登录账号</span>
              <Input
                className={formInputClass}
                value={user?.username ?? ""}
                disabled
                readOnly
              />
              <span className={formHintClass}>登录账号创建后不可修改</span>
            </label>
            <label className={formFieldClass}>
              <span>
                显示名称<span className="text-danger">*</span>
              </span>
              <Input
                className={formInputClass}
                value={displayName}
                onChange={(event) => setDisplayName(event.target.value)}
                placeholder="请输入显示名称"
                autoComplete="name"
                autoFocus
              />
            </label>
            <label className={formFieldClass}>
              <span>邮箱</span>
              <Input
                className={formInputClass}
                type="email"
                value={email}
                onChange={(event) => setEmail(event.target.value)}
                placeholder="可选"
                autoComplete="email"
              />
            </label>
          </form>
        ) : (
          <form
            id={formId}
            onSubmit={(event) => void handleChangePassword(event)}
          >
            <label className={formFieldClass}>
              <span>
                当前密码<span className="text-danger">*</span>
              </span>
              <Input
                className={formInputClass}
                type="password"
                value={currentPassword}
                onChange={(event) => setCurrentPassword(event.target.value)}
                autoComplete="current-password"
                autoFocus
              />
            </label>
            <label className={formFieldClass}>
              <span>
                新密码<span className="text-danger">*</span>
              </span>
              <Input
                className={formInputClass}
                type="password"
                value={newPassword}
                onChange={(event) => setNewPassword(event.target.value)}
                autoComplete="new-password"
                placeholder="8~72 字符"
              />
            </label>
            <label className={formFieldClass}>
              <span>
                确认新密码<span className="text-danger">*</span>
              </span>
              <Input
                className={formInputClass}
                type="password"
                value={confirmPassword}
                onChange={(event) => setConfirmPassword(event.target.value)}
                autoComplete="new-password"
              />
            </label>
          </form>
        )}
      </div>
    </AppFormDialog>
  );
}