"use client";

import api from "@app/api";
import { Button, buttonVariants } from "@app/components/ui/button";
import {
    Form,
    FormControl,
    FormDescription,
    FormField,
    FormItem,
    FormLabel,
    FormMessage,
} from "@app/components/ui/form";
import { Input } from "@app/components/ui/input";
import { useToast } from "@app/hooks/useToast";
import { zodResolver } from "@hookform/resolvers/zod";
import { useEffect, useState } from "react";
import { useForm } from "react-hook-form";
import { z } from "zod";
import {
    Credenza,
    CredenzaBody,
    CredenzaClose,
    CredenzaContent,
    CredenzaDescription,
    CredenzaFooter,
    CredenzaHeader,
    CredenzaTitle,
} from "@app/components/Credenza";
import { useOrgContext } from "@app/hooks/useOrgContext";
import { useParams, useRouter } from "next/navigation";
import { PickSiteDefaultsResponse } from "@server/routers/site";
import { generateKeypair } from "../[niceId]/components/wireguardConfig";
import CopyTextBox from "@app/components/CopyTextBox";
import { Checkbox } from "@app/components/ui/checkbox";
import {
    Select,
    SelectContent,
    SelectItem,
    SelectTrigger,
    SelectValue,
} from "@app/components/ui/select";

const method = [
    { label: "Wireguard", value: "wg" },
    { label: "Newt", value: "newt" },
] as const;

const accountFormSchema = z.object({
    name: z
        .string()
        .min(2, {
            message: "Name must be at least 2 characters.",
        })
        .max(30, {
            message: "Name must not be longer than 30 characters.",
        }),
    method: z.enum(["wg", "newt"]),
});

type AccountFormValues = z.infer<typeof accountFormSchema>;

const defaultValues: Partial<AccountFormValues> = {
    name: "",
    method: "wg",
};

type CreateSiteFormProps = {
    open: boolean;
    setOpen: (open: boolean) => void;
};

export default function CreateSiteForm({ open, setOpen }: CreateSiteFormProps) {
    const { toast } = useToast();

    const [loading, setLoading] = useState(false);

    const params = useParams();
    const orgId = params.orgId;
    const router = useRouter();

    const [keypair, setKeypair] = useState<{
        publicKey: string;
        privateKey: string;
    } | null>(null);
    const [isLoading, setIsLoading] = useState(true);
    const [isChecked, setIsChecked] = useState(false);
    const [siteDefaults, setSiteDefaults] =
        useState<PickSiteDefaultsResponse | null>(null);

    const handleCheckboxChange = (checked: boolean) => {
        setIsChecked(checked);
    };

    const form = useForm<AccountFormValues>({
        resolver: zodResolver(accountFormSchema),
        defaultValues,
    });

    useEffect(() => {
        if (!open) return;

        if (typeof window !== "undefined") {
            const generatedKeypair = generateKeypair();
            setKeypair(generatedKeypair);
            setIsLoading(false);

            api.get(`/org/${orgId}/pick-site-defaults`)
                .catch((e) => {
                    toast({
                        title: "Error picking site defaults",
                    });
                })
                .then((res) => {
                    if (res && res.status === 200) {
                        setSiteDefaults(res.data.data);
                    }
                });
        }
    }, [open]);

    async function onSubmit(data: AccountFormValues) {
        setLoading(true);
        const res = await api
            .put(`/org/${orgId}/site/`, {
                name: data.name,
                subnet: siteDefaults?.subnet,
                exitNodeId: siteDefaults?.exitNodeId,
                pubKey: keypair?.publicKey,
            })
            .catch((e) => {
                toast({
                    title: "Error creating site",
                });
            });

        if (res && res.status === 201) {
            const niceId = res.data.data.niceId;
            // navigate to the site page
            router.push(`/${orgId}/settings/sites/${niceId}`);

            // close the modal
            setOpen(false);
        }

        setLoading(false);
    }

    const wgConfig =
        keypair && siteDefaults
            ? `[Interface]
Address = ${siteDefaults.subnet}
ListenPort = 51820
PrivateKey = ${keypair.privateKey}

[Peer]
PublicKey = ${siteDefaults.publicKey}
AllowedIPs = ${siteDefaults.address.split("/")[0]}/32
Endpoint = ${siteDefaults.endpoint}:${siteDefaults.listenPort}
PersistentKeepalive = 5`
            : "";

    const newtConfig = `curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh`;

    return (
        <>
            <Credenza
                open={open}
                onOpenChange={(val) => {
                    setOpen(val);
                    setLoading(false);

                    // reset all values
                    form.reset();
                    setIsChecked(false);
                    setKeypair(null);
                    setSiteDefaults(null);
                }}
            >
                <CredenzaContent>
                    <CredenzaHeader>
                        <CredenzaTitle>Create Site</CredenzaTitle>
                        <CredenzaDescription>
                            Create a new site to start connecting your resources
                        </CredenzaDescription>
                    </CredenzaHeader>
                    <CredenzaBody>
                        <Form {...form}>
                            <form
                                onSubmit={form.handleSubmit(onSubmit)}
                                className="space-y-4"
                                id="create-site-form"
                            >
                                <FormField
                                    control={form.control}
                                    name="name"
                                    render={({ field }) => (
                                        <FormItem>
                                            <FormLabel>Name</FormLabel>
                                            <FormControl>
                                                <Input
                                                    placeholder="Your name"
                                                    {...field}
                                                />
                                            </FormControl>
                                            <FormDescription>
                                                This is the name that will be
                                                displayed for this site.
                                            </FormDescription>
                                            <FormMessage />
                                        </FormItem>
                                    )}
                                />
                                <FormField
                                    control={form.control}
                                    name="method"
                                    render={({ field }) => (
                                        <FormItem>
                                            <FormLabel>Method</FormLabel>
                                            <FormControl>
                                                <Select
                                                    value={field.value}
                                                    onValueChange={
                                                        field.onChange
                                                    }
                                                >
                                                    <SelectTrigger>
                                                        <SelectValue placeholder="Select method" />
                                                    </SelectTrigger>
                                                    <SelectContent>
                                                        <SelectItem value="wg">
                                                            WireGuard
                                                        </SelectItem>
                                                        <SelectItem value="newt">
                                                            Newt
                                                        </SelectItem>
                                                    </SelectContent>
                                                </Select>
                                            </FormControl>
                                            <FormDescription>
                                                This is how you will connect
                                                your site to Fossorial.
                                            </FormDescription>
                                            <FormMessage />
                                        </FormItem>
                                    )}
                                />

                                <div className="max-w-md">
                                    {form.watch("method") === "wg" &&
                                    !isLoading ? (
                                        <CopyTextBox text={wgConfig} />
                                    ) : form.watch("method") === "wg" &&
                                      isLoading ? (
                                        <p>
                                            Loading WireGuard configuration...
                                        </p>
                                    ) : (
                                        <CopyTextBox
                                            text={newtConfig}
                                            wrapText={false}
                                        />
                                    )}
                                </div>

                                <span className="text-sm text-muted-foreground mt-2">
                                    You will only be able to see the
                                    configuration once.
                                </span>

                                <div className="flex items-center space-x-2">
                                    <Checkbox
                                        id="terms"
                                        checked={isChecked}
                                        onCheckedChange={handleCheckboxChange}
                                    />
                                    <label
                                        htmlFor="terms"
                                        className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70"
                                    >
                                        I have copied the config
                                    </label>
                                </div>
                            </form>
                        </Form>
                    </CredenzaBody>
                    <CredenzaFooter>
                        <Button
                            type="submit"
                            form="create-site-form"
                            loading={loading}
                            disabled={loading || !isChecked}
                        >
                            Create Site
                        </Button>
                        <CredenzaClose asChild>
                            <Button variant="outline">Close</Button>
                        </CredenzaClose>
                    </CredenzaFooter>
                </CredenzaContent>
            </Credenza>
        </>
    );
}