import * as React from "react";
import { Slot } from "@radix-ui/react-slot";
import { cva, type VariantProps } from "class-variance-authority";
import { PanelLeftIcon } from "lucide-react";

import { useIsMobile } from "@/lib/hooks";
import { cn } from "@/lib/utils";
import { Button } from "@/lib/components/ui/button";
import { Input } from "@/lib/components/ui/input";
import { Separator } from "@/lib/components/ui/separator";
import { Sheet, SheetContent, SheetDescription, SheetHeader, SheetTitle } from "@/lib/components/ui/sheet";
import { Skeleton } from "@/lib/components/ui/skeleton";
import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/lib/components/ui/tooltip";

const SIDEBAR_COOKIE_NAME = "sidebar_state";
const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7;
const SIDEBAR_WIDTH = "16rem";
const SIDEBAR_WIDTH_MOBILE = "18rem";
const SIDEBAR_WIDTH_ICON = "3rem";
const SIDEBAR_KEYBOARD_SHORTCUT = "b";

type SidebarContextProps = {
    state: "expanded" | "collapsed";
    open: boolean;
    setOpen: (open: boolean) => void;
    openMobile: boolean;
    setOpenMobile: (open: boolean) => void;
    isMobile: boolean;
    toggleSidebar: () => void;
};

const SidebarContext = React.createContext<SidebarContextProps | null>(null);

function useSidebar() {
    const context = React.useContext(SidebarContext);
    if (!context) {
        throw new Error("useSidebar must be used within a SidebarProvider.");
    }

    return context;
}

function SidebarProvider({
    defaultOpen = true,
    open: openProp,
    onOpenChange: setOpenProp,
    className,
    style,
    children,
    ...props
}: React.ComponentProps<"div"> & {
    defaultOpen?: boolean;
    open?: boolean;
    onOpenChange?: (open: boolean) => void;
}) {
    const isMobile = useIsMobile();
    const [openMobile, setOpenMobile] = React.useState(false);

    // This is the internal state of the sidebar.
    // We use openProp and setOpenProp for control from outside the component.
    const [_open, _setOpen] = React.useState(defaultOpen);
    const open = openProp ?? _open;
    const setOpen = React.useCallback(
        (value: boolean | ((value: boolean) => boolean)) => {
            const openState = typeof value === "function" ? value(open) : value;
            if (setOpenProp) {
                setOpenProp(openState);
            } else {
                _setOpen(openState);
            }

            // This sets the cookie to keep the sidebar state.
            document.cookie = `${SIDEBAR_COOKIE_NAME}=${openState}; path=/; max-age=${SIDEBAR_COOKIE_MAX_AGE}`;
        },
        [setOpenProp, open]
    );

    // Helper to toggle the sidebar.
    const toggleSidebar = React.useCallback(() => {
        return isMobile ? setOpenMobile(open => !open) : setOpen(open => !open);
    }, [isMobile, setOpen, setOpenMobile]);

    // Adds a keyboard shortcut to toggle the sidebar.
    React.useEffect(() => {
        const handleKeyDown = (event: KeyboardEvent) => {
            if (event.key === SIDEBAR_KEYBOARD_SHORTCUT && (event.metaKey || event.ctrlKey)) {
                event.preventDefault();
                toggleSidebar();
            }
        };

        window.addEventListener("keydown", handleKeyDown);
        return () => window.removeEventListener("keydown", handleKeyDown);
    }, [toggleSidebar]);

    // We add a state so that we can do data-state="expanded" or "collapsed".
    // This makes it easier to style the sidebar with Tailwind classes.
    const state = open ? "expanded" : "collapsed";

    const contextValue = React.useMemo<SidebarContextProps>(
        () => ({
            state,
            open,
            setOpen,
            isMobile,
            openMobile,
            setOpenMobile,
            toggleSidebar,
        }),
        [state, open, setOpen, isMobile, openMobile, setOpenMobile, toggleSidebar]
    );

    return (
        <SidebarContext.Provider value={contextValue}>
            <TooltipProvider delayDuration={0}>
                <div
                    data-slot="sidebar-wrapper"
                    style={
                        {
                            "--sidebar-width": SIDEBAR_WIDTH,
                            "--sidebar-width-icon": SIDEBAR_WIDTH_ICON,
                            ...style,
                        } as React.CSSProperties
                    }
                    className={cn("group/sidebar-wrapper has-data-[variant=inset]:bg-sidebar flex min-h-svh w-full", className)}
                    {...props}
                >
                    {children}
                </div>
            </TooltipProvider>
        </SidebarContext.Provider>
    );
}

function Sidebar({
    side = "left",
    variant = "sidebar",
    collapsible = "offcanvas",
    className,
    children,
    ...props
}: React.ComponentProps<"div"> & {
    side?: "left" | "right";
    variant?: "sidebar" | "floating" | "inset";
    collapsible?: "offcanvas" | "icon" | "none";
}) {
    const { isMobile, state, openMobile, setOpenMobile } = useSidebar();

    if (collapsible === "none") {
        return (
            <div data-slot="sidebar" className={cn("bg-sidebar text-sidebar-foreground flex h-full w-(--sidebar-width) flex-col", className)} {...props}>
                {children}
            </div>
        );
    }

    if (isMobile) {
        return (
            <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
                <SheetContent
                    data-sidebar="sidebar"
                    data-slot="sidebar"
                    data-mobile="true"
                    className="bg-sidebar text-sidebar-foreground w-(--sidebar-width) p-0 [&>button]:hidden"
                    style={
                        {
                            "--sidebar-width": SIDEBAR_WIDTH_MOBILE,
                        } as React.CSSProperties
                    }
                    side={side}
                >
                    <SheetHeader className="sr-only">
                        <SheetTitle>Sidebar</SheetTitle>
                        <SheetDescription>Displays the mobile sidebar.</SheetDescription>
                    </SheetHeader>
                    <div className="flex h-full w-full flex-col">{children}</div>
                </SheetContent>
            </Sheet>
        );
    }

    return (
        <div className="group peer text-sidebar-foreground hidden md:block" data-state={state} data-collapsible={state === "collapsed" ? collapsible : ""} data-variant={variant} data-side={side} data-slot="sidebar">
            {/* This is what handles the sidebar gap on desktop */}
            <div
                data-slot="sidebar-gap"
                className={cn(
                    "relative w-(--sidebar-width) bg-transparent transition-[width] duration-200 ease-linear",
                    "group-data-[collapsible=offcanvas]:w-0",
                    "group-data-[side=right]:rotate-180",
                    variant === "floating" || variant === "inset" ? "group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4)))]" : "group-data-[collapsible=icon]:w-(--sidebar-width-icon)"
                )}
            />
            <div
                data-slot="sidebar-container"
                className={cn(
                    "fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear md:flex",
                    side === "left" ? "left-0 group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)]" : "right-0 group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)]",
                    // Adjust the padding for floating and inset variants.
                    variant === "floating" || variant === "inset"
                        ? "p-2 group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4))+2px)]"
                        : "group-data-[collapsible=icon]:w-(--sidebar-width-icon) group-data-[side=left]:border-r group-data-[side=right]:border-l",
                    className
                )}
                {...props}
            >
                <div
                    data-sidebar="sidebar"
                    data-slot="sidebar-inner"
                    className="bg-sidebar group-data-[variant=floating]:border-sidebar-border flex h-full w-full flex-col group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:border group-data-[variant=floating]:shadow-sm"
                >
                    {children}
                </div>
            </div>
        </div>
    );
}

function SidebarTrigger({ className, onClick, ...props }: React.ComponentProps<typeof Button>) {
    const { toggleSidebar } = useSidebar();

    return (
        <Button
            data-sidebar="trigger"
            data-slot="sidebar-trigger"
            variant="ghost"
            size="icon"
            className={cn("size-7", className)}
            onClick={event => {
                onClick?.(event);
                toggleSidebar();
            }}
            {...props}
        >
            <PanelLeftIcon />
            <span className="sr-only">Toggle Sidebar</span>
        </Button>
    );
}

function SidebarRail({ className, ...props }: React.ComponentProps<"button">) {
    const { toggleSidebar } = useSidebar();

    return (
        <button
            data-sidebar="rail"
            data-slot="sidebar-rail"
            aria-label="Toggle Sidebar"
            tabIndex={-1}
            onClick={toggleSidebar}
            title="Toggle Sidebar"
            className={cn(
                "hover:after:bg-sidebar-border absolute inset-y-0 z-20 hidden w-4 -translate-x-1/2 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 after:absolute after:inset-y-0 after:left-1/2 after:w-[2px] sm:flex",
                "in-data-[side=left]:cursor-w-resize in-data-[side=right]:cursor-e-resize",
                "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize",
                "hover:group-data-[collapsible=offcanvas]:bg-sidebar group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full",
                "[[data-side=left][data-collapsible=offcanvas]_&]:-right-2",
                "[[data-side=right][data-collapsible=offcanvas]_&]:-left-2",
                className
            )}
            {...props}
        />
    );
}

function SidebarInset({ className, ...props }: React.ComponentProps<"main">) {
    return (
        <main
            data-slot="sidebar-inset"
            className={cn(
                "bg-background relative flex w-full flex-1 flex-col",
                "md:peer-data-[variant=inset]:m-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow-sm md:peer-data-[variant=inset]:peer-data-[state=collapsed]:ml-2",
                className
            )}
            {...props}
        />
    );
}

function SidebarInput({ className, ...props }: React.ComponentProps<typeof Input>) {
    return <Input data-slot="sidebar-input" data-sidebar="input" className={cn("bg-background h-8 w-full shadow-none", className)} {...props} />;
}

function SidebarHeader({ className, ...props }: React.ComponentProps<"div">) {
    return <div data-slot="sidebar-header" data-sidebar="header" className={cn("flex flex-col gap-2 p-2", className)} {...props} />;
}

function SidebarFooter({ className, ...props }: React.ComponentProps<"div">) {
    return <div data-slot="sidebar-footer" data-sidebar="footer" className={cn("flex flex-col gap-2 p-2", className)} {...props} />;
}

function SidebarSeparator({ className, ...props }: React.ComponentProps<typeof Separator>) {
    return <Separator data-slot="sidebar-separator" data-sidebar="separator" className={cn("bg-sidebar-border mx-2 w-auto", className)} {...props} />;
}

function SidebarContent({ className, ...props }: React.ComponentProps<"div">) {
    return <div data-slot="sidebar-content" data-sidebar="content" className={cn("flex min-h-0 flex-1 flex-col gap-2 overflow-auto group-data-[collapsible=icon]:overflow-hidden", className)} {...props} />;
}

function SidebarGroup({ className, ...props }: React.ComponentProps<"div">) {
    return <div data-slot="sidebar-group" data-sidebar="group" className={cn("relative flex w-full min-w-0 flex-col p-2", className)} {...props} />;
}

function SidebarGroupLabel({ className, asChild = false, ...props }: React.ComponentProps<"div"> & { asChild?: boolean }) {
    const Comp = asChild ? Slot : "div";

    return (
        <Comp
            data-slot="sidebar-group-label"
            data-sidebar="group-label"
            className={cn(
                "text-sidebar-foreground/70 ring-sidebar-ring flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium outline-hidden transition-[margin,opacity] duration-200 ease-linear focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
                "group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0",
                className
            )}
            {...props}
        />
    );
}

function SidebarGroupAction({ className, asChild = false, ...props }: React.ComponentProps<"button"> & { asChild?: boolean }) {
    const Comp = asChild ? Slot : "button";

    return (
        <Comp
            data-slot="sidebar-group-action"
            data-sidebar="group-action"
            className={cn(
                "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground absolute top-3.5 right-3 flex aspect-square w-5 items-center justify-center rounded-md p-0 outline-hidden transition-transform focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
                // Increases the hit area of the button on mobile.
                "after:absolute after:-inset-2 md:after:hidden",
                "group-data-[collapsible=icon]:hidden",
                className
            )}
            {...props}
        />
    );
}

function SidebarGroupContent({ className, ...props }: React.ComponentProps<"div">) {
    return <div data-slot="sidebar-group-content" data-sidebar="group-content" className={cn("w-full text-sm", className)} {...props} />;
}

function SidebarMenu({ className, ...props }: React.ComponentProps<"ul">) {
    return <ul data-slot="sidebar-menu" data-sidebar="menu" className={cn("flex w-full min-w-0 flex-col gap-1", className)} {...props} />;
}

function SidebarMenuItem({ className, ...props }: React.ComponentProps<"li">) {
    return <li data-slot="sidebar-menu-item" data-sidebar="menu-item" className={cn("group/menu-item relative", className)} {...props} />;
}

const sidebarMenuButtonVariants = cva(
    "peer/menu-button flex w-full items-center gap-2 overflow-hidden rounded-md p-2 text-left text-sm outline-hidden ring-sidebar-ring transition-[width,height,padding] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 group-has-data-[sidebar=menu-action]/menu-item:pr-8 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[active=true]:bg-sidebar-accent data-[active=true]:font-medium data-[active=true]:text-sidebar-accent-foreground data-[state=open]:hover:bg-sidebar-accent data-[state=open]:hover:text-sidebar-accent-foreground group-data-[collapsible=icon]:size-8! group-data-[collapsible=icon]:p-2! [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0",
    {
        variants: {
            variant: {
                default: "hover:bg-sidebar-accent hover:text-sidebar-accent-foreground",
                outline: "bg-background shadow-[0_0_0_1px_hsl(var(--sidebar-border))] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground hover:shadow-[0_0_0_1px_hsl(var(--sidebar-accent))]",
            },
            size: {
                default: "h-8 text-sm",
                sm: "h-7 text-xs",
                lg: "h-12 text-sm group-data-[collapsible=icon]:p-0!",
            },
        },
        defaultVariants: {
            variant: "default",
            size: "default",
        },
    }
);

function SidebarMenuButton({
    asChild = false,
    isActive = false,
    variant = "default",
    size = "default",
    tooltip,
    className,
    ...props
}: React.ComponentProps<"button"> & {
    asChild?: boolean;
    isActive?: boolean;
    tooltip?: string | React.ComponentProps<typeof TooltipContent>;
} & VariantProps<typeof sidebarMenuButtonVariants>) {
    const Comp = asChild ? Slot : "button";
    const { isMobile, state } = useSidebar();

    const button = <Comp data-slot="sidebar-menu-button" data-sidebar="menu-button" data-size={size} data-active={isActive} className={cn(sidebarMenuButtonVariants({ variant, size }), className)} {...props} />;

    if (!tooltip) {
        return button;
    }

    if (typeof tooltip === "string") {
        tooltip = {
            children: tooltip,
        };
    }

    return (
        <Tooltip>
            <TooltipTrigger asChild>{button}</TooltipTrigger>
            <TooltipContent side="right" align="center" hidden={state !== "collapsed" || isMobile} {...tooltip} />
        </Tooltip>
    );
}

function SidebarMenuAction({
    className,
    asChild = false,
    showOnHover = false,
    ...props
}: React.ComponentProps<"button"> & {
    asChild?: boolean;
    showOnHover?: boolean;
}) {
    const Comp = asChild ? Slot : "button";

    return (
        <Comp
            data-slot="sidebar-menu-action"
            data-sidebar="menu-action"
            className={cn(
                "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground peer-hover/menu-button:text-sidebar-accent-foreground absolute top-1.5 right-1 flex aspect-square w-5 items-center justify-center rounded-md p-0 outline-hidden transition-transform focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
                // Increases the hit area of the button on mobile.
                "after:absolute after:-inset-2 md:after:hidden",
                "peer-data-[size=sm]/menu-button:top-1",
                "peer-data-[size=default]/menu-button:top-1.5",
                "peer-data-[size=lg]/menu-button:top-2.5",
                "group-data-[collapsible=icon]:hidden",
                showOnHover && "peer-data-[active=true]/menu-button:text-sidebar-accent-foreground group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 data-[state=open]:opacity-100 md:opacity-0",
                className
            )}
            {...props}
        />
    );
}

function SidebarMenuBadge({ className, ...props }: React.ComponentProps<"div">) {
    return (
        <div
            data-slot="sidebar-menu-badge"
            data-sidebar="menu-badge"
            className={cn(
                "text-sidebar-foreground pointer-events-none absolute right-1 flex h-5 min-w-5 items-center justify-center rounded-md px-1 text-xs font-medium tabular-nums select-none",
                "peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[active=true]/menu-button:text-sidebar-accent-foreground",
                "peer-data-[size=sm]/menu-button:top-1",
                "peer-data-[size=default]/menu-button:top-1.5",
                "peer-data-[size=lg]/menu-button:top-2.5",
                "group-data-[collapsible=icon]:hidden",
                className
            )}
            {...props}
        />
    );
}

function SidebarMenuSkeleton({
    className,
    showIcon = false,
    ...props
}: React.ComponentProps<"div"> & {
    showIcon?: boolean;
}) {
    // Random width between 50 to 90%.
    const width = React.useMemo(() => {
        return `${Math.floor(Math.random() * 40) + 50}%`;
    }, []);

    return (
        <div data-slot="sidebar-menu-skeleton" data-sidebar="menu-skeleton" className={cn("flex h-8 items-center gap-2 rounded-md px-2", className)} {...props}>
            {showIcon && <Skeleton className="size-4 rounded-md" data-sidebar="menu-skeleton-icon" />}
            <Skeleton
                className="h-4 max-w-(--skeleton-width) flex-1"
                data-sidebar="menu-skeleton-text"
                style={
                    {
                        "--skeleton-width": width,
                    } as React.CSSProperties
                }
            />
        </div>
    );
}

function SidebarMenuSub({ className, ...props }: React.ComponentProps<"ul">) {
    return <ul data-slot="sidebar-menu-sub" data-sidebar="menu-sub" className={cn("border-sidebar-border mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l px-2.5 py-0.5", "group-data-[collapsible=icon]:hidden", className)} {...props} />;
}

function SidebarMenuSubItem({ className, ...props }: React.ComponentProps<"li">) {
    return <li data-slot="sidebar-menu-sub-item" data-sidebar="menu-sub-item" className={cn("group/menu-sub-item relative", className)} {...props} />;
}

function SidebarMenuSubButton({
    asChild = false,
    size = "md",
    isActive = false,
    className,
    ...props
}: React.ComponentProps<"a"> & {
    asChild?: boolean;
    size?: "sm" | "md";
    isActive?: boolean;
}) {
    const Comp = asChild ? Slot : "a";

    return (
        <Comp
            data-slot="sidebar-menu-sub-button"
            data-sidebar="menu-sub-button"
            data-size={size}
            data-active={isActive}
            className={cn(
                "text-sidebar-foreground ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground active:bg-sidebar-accent active:text-sidebar-accent-foreground [&>svg]:text-sidebar-accent-foreground flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 outline-hidden focus-visible:ring-2 disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0",
                "data-[active=true]:bg-sidebar-accent data-[active=true]:text-sidebar-accent-foreground",
                size === "sm" && "text-xs",
                size === "md" && "text-sm",
                "group-data-[collapsible=icon]:hidden",
                className
            )}
            {...props}
        />
    );
}

export {
    Sidebar,
    SidebarContent,
    SidebarFooter,
    SidebarGroup,
    SidebarGroupAction,
    SidebarGroupContent,
    SidebarGroupLabel,
    SidebarHeader,
    SidebarInput,
    SidebarInset,
    SidebarMenu,
    SidebarMenuAction,
    SidebarMenuBadge,
    SidebarMenuButton,
    SidebarMenuItem,
    SidebarMenuSkeleton,
    SidebarMenuSub,
    SidebarMenuSubButton,
    SidebarMenuSubItem,
    SidebarProvider,
    SidebarRail,
    SidebarSeparator,
    SidebarTrigger,
};
