import React from "react";
import { SidebarSection } from "@components/UI/Sidebar/SidebarSection.tsx";
import { Subtle } from "@components/UI/Typography/Subtle.tsx";
import { useDevice } from "@core/stores/deviceStore.ts";
import type { Page } from "@core/stores/deviceStore.ts";
import { Spinner } from "@components/UI/Spinner.tsx";
import { Avatar } from "@components/UI/Avatar.tsx";

import {
  CircleChevronLeft,
  CpuIcon,
  LayersIcon,
  type LucideIcon,
  MapIcon,
  MessageSquareIcon,
  PenLine,
  SearchIcon,
  SettingsIcon,
  UsersIcon,
  ZapIcon,
} from "lucide-react";
import { cn } from "@core/utils/cn.ts";
import { useSidebar } from "@core/stores/sidebarStore.tsx";
import ThemeSwitcher from "@components/ThemeSwitcher.tsx";
import { useAppStore } from "@core/stores/appStore.ts";
import BatteryStatus from "@components/BatteryStatus.tsx";
import { SidebarButton } from "@components/UI/Sidebar/SidebarButton.tsx";

export interface SidebarProps {
  children?: React.ReactNode;
}

interface NavLink {
  name: string;
  icon: LucideIcon;
  page: Page;
}

const CollapseToggleButton = () => {
  const { isCollapsed, toggleSidebar } = useSidebar();
  const buttonLabel = isCollapsed ? "Open sidebar" : "Close sidebar";

  return (
    <button
      type="button"
      aria-label={buttonLabel}
      onClick={toggleSidebar}
      className={cn(
        'absolute top-20 right-0 z-10 p-0.5 rounded-full transform translate-x-1/2',
        'transition-colors duration-300 ease-in-out',
        'border border-slate-300 dark:border-slate-200',
        'text-slate-500 dark:text-slate-200 hover:text-slate-400 dark:hover:text-slate-400',
        'focus:outline-none focus:ring-2 focus:ring-accent transition-transform'
      )}
    >
      <CircleChevronLeft
        size={24}
        className={cn(
          'transition-transform duration-300 ease-in-out',
          isCollapsed && 'rotate-180'
        )}
      />
    </button>
  );
}

export const Sidebar = ({ children }: SidebarProps) => {
  const { hardware, getNode, getNodesLength, metadata, activePage, setActivePage, setDialogOpen } = useDevice();
  const { setCommandPaletteOpen } = useAppStore();
  const myNode = getNode(hardware.myNodeNum);
  const { isCollapsed } = useSidebar();
  const myMetadata = metadata.get(0);

  const pages: NavLink[] = [
    { name: "Messages", icon: MessageSquareIcon, page: "messages" },
    { name: "Map", icon: MapIcon, page: "map" },
    { name: "Config", icon: SettingsIcon, page: "config" },
    { name: "Channels", icon: LayersIcon, page: "channels" },
    {
      name: `Nodes (${Math.max(getNodesLength() - 1, 0)})`,
      icon: UsersIcon,
      page: "nodes",
    },
  ];

  return (
    <div
      className={cn(
        'relative border-slate-300 dark:border-slate-700',
        'transition-all duration-300 ease-in-out flex-shrink-0',
        isCollapsed ? 'w-24' : 'w-46 lg:w-64'
      )}
    >
      <CollapseToggleButton />

      <div
        className={cn(
          'h-14 flex mt-2 gap-2 items-center flex-shrink-0 transition-all duration-300 ease-in-out',
          'border-b-[0.5px] border-slate-300 dark:border-slate-700',
          isCollapsed && 'justify-center px-0'

        )}
      >
        <img
          src="Logo.svg"
          alt="Meshtastic Logo"
          className="size-10 flex-shrink-0 rounded-xl"
        />
        <h2
          className={cn(
            'text-xl font-semibold text-gray-800 dark:text-gray-100 whitespace-nowrap',
            'transition-all duration-300 ease-in-out',
            isCollapsed
              ? 'opacity-0 max-w-0 invisible ml-0'
              : 'opacity-100 max-w-xs visible ml-2'
          )}
        >
          Meshtastic
        </h2>
      </div>

      <SidebarSection label="Navigation" className="mt-4 px-0">
        {pages.map((link) => (
          <SidebarButton
            key={link.name}
            label={link.name}
            Icon={link.icon}
            onClick={() => {
              if (myNode !== undefined) {
                setActivePage(link.page);
              }
            }}
            active={link.page === activePage}
            disabled={myNode === undefined}
          />
        ))}
      </SidebarSection>

      <div className={cn(
        'flex-1 min-h-0',
        isCollapsed && 'overflow-hidden'
      )}
      >
        {children}
      </div>

      <div className="pt-4 border-t-[0.5px] bg-background-primary border-slate-300 dark:border-slate-700 flex-shrink-0">
        {myNode === undefined ? (
          <div className="flex flex-col items-center justify-center py-6">
            <Spinner />
            <Subtle
              className={cn(
                'mt-4 transition-opacity duration-300',
                isCollapsed ? 'opacity-0 invisible' : 'opacity-100 visible'
              )}
            >
              Loading...
            </Subtle>
          </div>
        ) : (
          <>
            <div
              className={cn(
                'flex place-items-center gap-2',
                isCollapsed && 'justify-center'
              )}
            >
              <Avatar
                text={myNode.user?.shortName ?? myNode.num.toString()}
                className={cn("flex-shrink-0 ml-2",
                  isCollapsed && "ml-0",
                )}
                size="sm"
              />
              <p
                className={cn(
                  'max-w-[20ch] text-wrap text-sm font-medium',
                  'transition-all duration-300 ease-in-out overflow-hidden',
                  isCollapsed
                    ? 'opacity-0 max-w-0 invisible'
                    : 'opacity-100 max-w-full visible'
                )}
              >
                {myNode.user?.longName}
              </p>
            </div>

            <div
              className={cn(
                'flex flex-col gap-0.5 ml-2 mt-2',
                'transition-all duration-300 ease-in-out',
                isCollapsed
                  ? 'opacity-0 max-w-0 h-0 invisible'
                  : 'opacity-100 max-w-xs h-auto visible'
              )}
            >
              <div className="inline-flex gap-2">
                <BatteryStatus deviceMetrics={myNode.deviceMetrics} />
              </div>
              <div className="inline-flex gap-2">
                <ZapIcon size={18} className="text-gray-500 dark:text-gray-400 w-4 flex-shrink-0" />
                <Subtle>{myNode.deviceMetrics?.voltage?.toPrecision(3) ?? "UNK"} volts</Subtle>
              </div>
              <div className="inline-flex gap-2">
                <CpuIcon size={18} className="text-gray-500 dark:text-gray-400 w-4 flex-shrink-0" />
                <Subtle>v{myMetadata?.firmwareVersion ?? "UNK"}</Subtle>
              </div>
            </div>
            <div
              className={cn(
                'flex items-center flex-shrink-0 ml-2',
                'transition-all duration-300 ease-in-out',
                isCollapsed
                  ? 'opacity-0 max-w-0 invisible pointer-events-none'
                  : 'opacity-100 max-w-xs visible'
              )}
            >
              <button
                type="button"
                aria-label="Edit device name"
                className="p-1 rounded transition-colors hover:text-accent"
                onClick={() => setDialogOpen("deviceName", true)}
              >
                <PenLine size={22} />
              </button>
              <ThemeSwitcher />
              <button
                type="button"
                className="transition-all hover:text-accent"
                onClick={() => setCommandPaletteOpen(true)}
              >
                <SearchIcon />
              </button>
            </div>

          </>
        )}
      </div>
    </div>
  );
};