"use client";

import { usePathname, useRouter } from "next/navigation";
import { signOut } from "next-auth/react";
import {
  Activity,
  AppWindow,
  Calendar,
  CheckSquare,
  ChevronDown,
  FileText,
  LayoutGrid,
  LayoutTemplate,
  LogOut,
  Pencil,
  Plus,
  Presentation,
  ScrollText,
  Search,
  Settings,
  User,
  Users,
  Zap,
} from "lucide-react";

import { Avatar, AvatarFallback } from "@/components/ui/avatar";
import { Button } from "@/components/ui/button";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuLabel,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
import { useWorkspaceStore } from "@/lib/stores/workspace-store";
import { cn } from "@/lib/utils";

export interface TopHeaderProps {
  onOpenSearch?: () => void;
  onQuickAction?: (type: string) => void;
}

export function TopHeader({ onOpenSearch, onQuickAction }: TopHeaderProps) {
  const pathname = usePathname();
  const router = useRouter();
  const workspace = useWorkspaceStore((s) => s.currentWorkspace);
  const workspaceName = workspace?.name ?? "Workspace";
  const workspaceId = workspace?.id;
  const initials = workspaceName.trim().slice(0, 2).toUpperCase() || "WS";

  return (
    <header
      className={cn(
        "sticky top-0 z-10 flex h-12 w-full shrink-0 items-center gap-4 border-b border-border bg-background px-4",
      )}
    >
      {/* Workspace dropdown */}
      <DropdownMenu>
        <DropdownMenuTrigger asChild>
          <button
            type="button"
            className="flex shrink-0 items-center gap-2 rounded-md px-2 py-1.5 text-sm font-medium text-foreground transition-colors hover:bg-muted focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
          >
            <div className="flex h-7 w-7 items-center justify-center rounded-md bg-primary/15 text-[10px] font-bold text-primary">
              {initials}
            </div>
            <span className="max-w-[180px] truncate">{workspaceName}</span>
            <ChevronDown className="size-3.5 opacity-50" />
          </button>
        </DropdownMenuTrigger>
        <DropdownMenuContent align="start" className="w-64 p-0">
          {/* Header */}
          <div className="flex items-start gap-3 px-4 py-3">
            <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-lg bg-primary/15 text-sm font-bold text-primary">
              {initials}
            </div>
            <div className="min-w-0 flex-1">
              <p className="truncate text-sm font-semibold">{workspaceName}</p>
              <p className="text-xs text-muted-foreground">1 member</p>
            </div>
          </div>
          {/* Settings + People row */}
          <div className="flex gap-2 px-4 pb-3">
            <Button
              variant="outline"
              size="sm"
              className="flex-1 gap-1.5 text-xs"
              onClick={() => workspaceId && router.push(`/${workspaceId}/settings`)}
            >
              <Settings className="size-3.5" />
              Settings
            </Button>
            <Button
              variant="outline"
              size="sm"
              className="flex-1 gap-1.5 text-xs"
            >
              <Users className="size-3.5" />
              People
            </Button>
          </div>
          <DropdownMenuSeparator className="my-0" />
          {/* Manage section */}
          <DropdownMenuLabel className="px-4 pb-1 pt-3 text-xs font-medium text-muted-foreground">
            Manage
          </DropdownMenuLabel>
          <DropdownMenuItem className="gap-2.5 px-4">
            <AppWindow className="size-4 text-muted-foreground" />
            Apps
          </DropdownMenuItem>
          <DropdownMenuItem
            className="gap-2.5 px-4"
            onSelect={() =>
              workspaceId && router.push(`/${workspaceId}/settings/templates`)
            }
          >
            <LayoutTemplate className="size-4 text-muted-foreground" />
            Templates
          </DropdownMenuItem>
          <DropdownMenuItem
            className="gap-2.5 px-4"
            onSelect={() =>
              workspaceId && router.push(`/${workspaceId}/settings/types`)
            }
          >
            <Pencil className="size-4 text-muted-foreground" />
            Custom Fields
          </DropdownMenuItem>
          <DropdownMenuItem className="gap-2.5 px-4">
            <Zap className="size-4 text-muted-foreground" />
            Automations
          </DropdownMenuItem>
          <DropdownMenuItem
            className="gap-2.5 px-4"
            onSelect={() =>
              workspaceId && router.push(`/${workspaceId}/settings/audit`)
            }
          >
            <ScrollText className="size-4 text-muted-foreground" />
            Audit log
          </DropdownMenuItem>
          <DropdownMenuItem
            className="gap-2.5 px-4"
            onSelect={() =>
              workspaceId && router.push(`/${workspaceId}/settings/runs`)
            }
          >
            <Activity className="size-4 text-muted-foreground" />
            Agent runs
          </DropdownMenuItem>
          <DropdownMenuSeparator />
          {/* Create Workspace */}
          <div className="px-3 py-2">
            <Button
              variant="outline"
              size="sm"
              className="w-full gap-1.5 text-xs"
              onClick={() => window.alert("Create workspace (placeholder)")}
            >
              <Plus className="size-3.5" />
              Create Workspace
            </Button>
          </div>
        </DropdownMenuContent>
      </DropdownMenu>

      {/* Center search bar */}
      <div className="flex flex-1 justify-center px-2">
        <div
          role="button"
          tabIndex={0}
          className={cn(
            "flex h-9 w-full max-w-[400px] cursor-pointer items-center gap-2 rounded-lg border border-border bg-muted/50 px-3 text-sm text-muted-foreground transition-colors hover:bg-muted/70 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background",
          )}
          onClick={() => onOpenSearch?.()}
          onKeyDown={(e) => {
            if (e.key === "Enter" || e.key === " ") {
              e.preventDefault();
              onOpenSearch?.();
            }
          }}
        >
          <Search className="size-4 shrink-0 opacity-70" aria-hidden />
          <span className="min-w-0 flex-1 truncate text-left">Search...</span>
          <kbd className="pointer-events-none shrink-0 rounded border border-border bg-muted px-1.5 py-0.5 font-mono text-[10px] font-medium">
            Cmd+/
          </kbd>
        </div>
      </div>

      {/* Right actions */}
      <div className="flex shrink-0 items-center gap-1.5">
        <Tooltip>
          <TooltipTrigger asChild>
            <Button
              type="button"
              variant="ghost"
              size="icon"
              className="h-8 w-8"
              aria-label="Calendar"
            >
              <Calendar className="size-4" />
            </Button>
          </TooltipTrigger>
          <TooltipContent>Calendar</TooltipContent>
        </Tooltip>

        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button
              type="button"
              variant="outline"
              size="icon"
              className="h-8 w-8"
              aria-label="Quick actions"
            >
              <Plus className="size-4" />
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end" className="w-52">
            <DropdownMenuItem onClick={() => onQuickAction?.("task")}>
              <CheckSquare className="size-4" />
              New Task
            </DropdownMenuItem>
            <DropdownMenuItem onClick={() => onQuickAction?.("doc")}>
              <FileText className="size-4" />
              New Doc
            </DropdownMenuItem>
            <DropdownMenuItem onClick={() => onQuickAction?.("whiteboard")}>
              <Presentation className="size-4" />
              New Whiteboard
            </DropdownMenuItem>
            <DropdownMenuItem onClick={() => onQuickAction?.("space")}>
              <LayoutGrid className="size-4" />
              New Space
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>

        <DropdownMenu>
          <DropdownMenuTrigger asChild>
            <Button
              type="button"
              variant="ghost"
              className="relative h-8 w-8 rounded-full p-0"
              aria-label="Account menu"
            >
              <Avatar className="h-8 w-8">
                <AvatarFallback className="text-xs">U</AvatarFallback>
              </Avatar>
            </Button>
          </DropdownMenuTrigger>
          <DropdownMenuContent align="end" className="w-48">
            <DropdownMenuItem onSelect={() => {}}>
              <User className="size-4" />
              Account
            </DropdownMenuItem>
            <DropdownMenuItem
              onSelect={() =>
                workspaceId && router.push(`/${workspaceId}/settings`)
              }
            >
              <Settings className="size-4" />
              Settings
            </DropdownMenuItem>
            <DropdownMenuSeparator />
            <DropdownMenuItem
              onSelect={() => signOut({ callbackUrl: "/sign-in" })}
            >
              <LogOut className="size-4" />
              Sign Out
            </DropdownMenuItem>
          </DropdownMenuContent>
        </DropdownMenu>
      </div>
    </header>
  );
}