"use client";

import { usePathname, useRouter } from "next/navigation";
import { Building2, Check, ChevronUp, Ellipsis, Link2, LogOut, Settings } from "lucide-react";
import { FormEvent, useEffect, useRef, useState } from "react";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Dialog } from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import type { ApiResult } from "@/modules/core/server/api";
import type { AccountOrganizationOption, Organization, PublicAccount } from "@/modules/core/types";
import { UserAvatar } from "@/modules/shared/components/UserAvatar";
import { getWorkspaceHref, getWorkspacePathFromPathname } from "@/modules/shared/lib/workspace-routing";
import { cn } from "@/lib/utils";

type AccountMenuProps = {
  account: PublicAccount;
  organization?: Organization;
  organizations: AccountOrganizationOption[];
};

export function AccountMenu({
  account,
  organization,
  organizations,
}: AccountMenuProps): React.ReactElement {
  const router = useRouter();
  const pathname = usePathname();
  const menuRef = useRef<HTMLDivElement>(null);
  const [isOpen, setIsOpen] = useState(false);
  const [isOrganizationOpen, setIsOrganizationOpen] = useState(false);
  const [isSettingsOpen, setIsSettingsOpen] = useState(false);
  const [isSignOutConfirmOpen, setIsSignOutConfirmOpen] = useState(false);
  const [isPending, setIsPending] = useState(false);
  const [message, setMessage] = useState("");
  const currentOrganization = organizations.find((item) => item.isActive) ?? organizations[0];

  useEffect(() => {
    if (!isOpen && !isOrganizationOpen) {
      return;
    }

    function handlePointerDown(event: PointerEvent): void {
      const target = event.target;
      if (target instanceof Node && !menuRef.current?.contains(target)) {
        setIsOpen(false);
        setIsOrganizationOpen(false);
      }
    }

    function handleKeyDown(event: KeyboardEvent): void {
      if (event.key === "Escape") {
        setIsOpen(false);
        setIsOrganizationOpen(false);
      }
    }

    document.addEventListener("pointerdown", handlePointerDown);
    document.addEventListener("keydown", handleKeyDown);

    return () => {
      document.removeEventListener("pointerdown", handlePointerDown);
      document.removeEventListener("keydown", handleKeyDown);
    };
  }, [isOpen, isOrganizationOpen]);

  async function handleOrganizationSwitch(organizationId: string): Promise<void> {
    setMessage("");
    setIsPending(true);
    const response = await fetch("/api/auth/organization", {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ organizationId }),
    });
    const result = (await response.json()) as ApiResult<{
      organization: Organization | null;
      organizations: AccountOrganizationOption[];
    }>;
    setIsPending(false);

    if (!result.success) {
      setMessage(result.reason);
      return;
    }

    setIsOrganizationOpen(false);
    const activeOrganization = result.organization ?? result.organizations.find((item) => item.isActive);
    const workspacePath = getWorkspacePathFromPathname(pathname);
    router.replace(getWorkspaceHref(activeOrganization?.slug, workspacePath));
    router.refresh();
  }

  async function handleSignOut(): Promise<void> {
    setIsPending(true);
    await fetch("/api/auth/logout", { method: "POST" });
    router.refresh();
    router.replace("/login");
  }

  async function handleProfileSubmit(event: FormEvent<HTMLFormElement>): Promise<void> {
    event.preventDefault();
    setMessage("");
    setIsPending(true);
    const formData = new FormData(event.currentTarget);
    const response = await fetch("/api/account/profile", {
      method: "PATCH",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({
        name: String(formData.get("name") ?? ""),
        avatarUrl: String(formData.get("avatarUrl") ?? ""),
      }),
    });
    const result = (await response.json()) as ApiResult<{ account: PublicAccount }>;
    setIsPending(false);

    if (!result.success) {
      setMessage(result.reason);
      return;
    }

    setMessage(result.reason);
    router.refresh();
  }

  return (
    <div className="relative grid gap-2" ref={menuRef}>
      <button
        aria-expanded={isOrganizationOpen}
        aria-haspopup="menu"
        className="flex min-h-10 w-full min-w-0 items-center gap-2 rounded-md border bg-card px-3 text-left text-sm transition-colors hover:bg-secondary"
        disabled={isPending || organizations.length === 0}
        onClick={() => {
          setMessage("");
          setIsOrganizationOpen((current) => !current);
          setIsOpen(false);
        }}
        type="button"
      >
        <Building2 className="size-4 shrink-0 text-primary" aria-hidden="true" />
        <span className="min-w-0 flex-1">
          <span className="block truncate font-medium">{currentOrganization?.name ?? organization?.name ?? "未选择机构"}</span>
          <span className="block truncate text-xs text-muted-foreground">
            {currentOrganization?.slug ? `/${currentOrganization.slug}` : "机构标识未配置"}
          </span>
        </span>
        <ChevronUp className={cn("size-4 shrink-0 text-muted-foreground transition-transform", isOrganizationOpen && "rotate-180")} />
      </button>

      {isOrganizationOpen ? (
        <div
          className="absolute bottom-full left-0 right-0 z-30 mb-2 max-h-80 overflow-y-auto rounded-md border bg-popover p-1 text-popover-foreground shadow-lg"
          role="menu"
        >
          {organizations.map((item) => (
            <button
              className="flex min-h-11 w-full min-w-0 items-center gap-2 rounded-sm px-3 text-left text-sm hover:bg-secondary disabled:opacity-55"
              disabled={isPending || item.isActive}
              key={item.id}
              onClick={() => void handleOrganizationSwitch(item.id)}
              role="menuitem"
              type="button"
            >
              <Building2 className="size-4 shrink-0 text-muted-foreground" aria-hidden="true" />
              <span className="min-w-0 flex-1">
                <span className="block truncate font-medium">{item.name}</span>
                <span className="block truncate text-xs text-muted-foreground">
                  /{item.slug} · {item.roleLabel}
                </span>
              </span>
              {item.isActive ? <Check className="size-4 shrink-0 text-primary" aria-hidden="true" /> : null}
            </button>
          ))}
          {message ? <p className="px-3 py-2 text-xs text-destructive">{message}</p> : null}
        </div>
      ) : null}

      <div className="flex min-w-0 items-center gap-3 rounded-md bg-secondary/55 p-2">
        <UserAvatar avatarUrl={account.avatarUrl} name={account.name} size="sm" />
        <div className="min-w-0 flex-1">
          <p className="truncate text-sm font-medium leading-tight">{account.name}</p>
          <p className="truncate text-xs leading-tight text-muted-foreground">{account.email}</p>
        </div>
        <Button
          aria-expanded={isOpen}
          aria-haspopup="menu"
          aria-label="打开账号菜单"
          onClick={() => {
            setMessage("");
            setIsOpen((current) => !current);
            setIsOrganizationOpen(false);
          }}
          size="icon"
          type="button"
          variant="ghost"
          className="size-9 shrink-0"
        >
          <Ellipsis className="size-4" aria-hidden="true" />
        </Button>
      </div>

      {isOpen ? (
        <div
          className="absolute bottom-full right-0 z-30 mb-2 w-52 rounded-md border bg-popover p-1 text-popover-foreground shadow-lg"
          role="menu"
        >
          <button
            className="flex min-h-10 w-full items-center gap-2 rounded-sm px-3 text-left text-sm font-medium hover:bg-secondary"
            onClick={() => {
              setIsOpen(false);
              setIsSettingsOpen(true);
              setMessage("");
            }}
            role="menuitem"
            type="button"
          >
            <Settings className="size-4 text-muted-foreground" aria-hidden="true" />
            用户设置
          </button>
          <button
            className="flex min-h-10 w-full items-center gap-2 rounded-sm px-3 text-left text-sm font-medium text-destructive hover:bg-destructive/10 disabled:opacity-55"
            disabled={isPending}
            onClick={() => {
              setIsOpen(false);
              setIsSignOutConfirmOpen(true);
            }}
            role="menuitem"
            type="button"
          >
            <LogOut className="size-4 text-destructive" aria-hidden="true" />
            退出登录
          </button>
        </div>
      ) : null}

      <Dialog
        className="max-w-2xl"
        description="管理你的个人资料和第三方登录绑定状态。"
        onClose={() => {
          if (!isPending) {
            setIsSettingsOpen(false);
            setMessage("");
          }
        }}
        open={isSettingsOpen}
        title="用户设置"
      >
        <form className="grid gap-5" onSubmit={handleProfileSubmit}>
          <div className="grid gap-4 md:grid-cols-[auto_1fr]">
            <UserAvatar avatarUrl={account.avatarUrl} name={account.name} size="lg" />
            <div className="grid gap-3">
              <Input defaultValue={account.name} label="用户名称" name="name" required />
              <Input defaultValue={account.avatarUrl} label="头像 URL" name="avatarUrl" placeholder="https://..." />
            </div>
          </div>

          <section className="rounded-md border p-4">
            <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
              <div className="min-w-0">
                <div className="flex items-center gap-2">
                  <Link2 className="size-4 text-primary" aria-hidden="true" />
                  <h3 className="text-sm font-semibold">第三方 OIDC 绑定</h3>
                </div>
                <p className="mt-1 text-sm text-muted-foreground">
                  {organization?.oidcEnabled ? "当前机构已配置 OIDC 登录入口。" : "当前机构暂未启用 OIDC 登录入口。"}
                </p>
              </div>
              <Badge variant={organization?.oidcEnabled ? "success" : "secondary"}>
                {organization?.oidcEnabled ? "可接入" : "未启用"}
              </Badge>
            </div>
            <div className="mt-4 rounded-md bg-secondary/55 px-3 py-2 text-sm text-muted-foreground">
              绑定、解绑和重新授权需要接入 OIDC 回调与绑定记录后启用；当前不会展示虚假的绑定账号。
            </div>
          </section>

          {message ? (
            <p className="rounded-md bg-secondary px-3 py-2 text-sm text-secondary-foreground" role="status">
              {message}
            </p>
          ) : null}

          <div className="flex justify-end gap-2">
            <Button disabled={isPending} onClick={() => setIsSettingsOpen(false)} type="button" variant="outline">
              取消
            </Button>
            <Button disabled={isPending} type="submit">
              保存资料
            </Button>
          </div>
        </form>
      </Dialog>

      <Dialog
        className="max-w-md"
        description="退出后需要重新登录才能继续访问工作台。"
        onClose={() => {
          if (!isPending) {
            setIsSignOutConfirmOpen(false);
          }
        }}
        open={isSignOutConfirmOpen}
        title="确认退出登录"
      >
        <div className="grid gap-4">
          <p className="text-sm text-muted-foreground">确定要退出当前账号吗？</p>
          <div className="flex justify-end gap-2">
            <Button disabled={isPending} onClick={() => setIsSignOutConfirmOpen(false)} type="button" variant="outline">
              取消
            </Button>
            <Button disabled={isPending} onClick={() => void handleSignOut()} type="button" variant="destructive">
              <LogOut className="size-4" aria-hidden="true" />
              退出登录
            </Button>
          </div>
        </div>
      </Dialog>
    </div>
  );
}