"use client";

import { useEnvContext } from "@app/hooks/useEnvContext";
import { createApiClient, formatAxiosError } from "@app/lib/api";
import { AxiosResponse } from "axios";
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import {
    Card,
    CardHeader,
    CardTitle,
    CardContent,
    CardDescription
} from "@/components/ui/card";
import { Alert, AlertDescription } from "@/components/ui/alert";
import { Loader2, CheckCircle2, AlertCircle } from "lucide-react";
import { useLicenseStatusContext } from "@app/hooks/useLicenseStatusContext";
import { useTranslations } from "next-intl";
import { validateOidcUrlCallbackProxy } from "@app/actions/server";

type ValidateOidcTokenParams = {
    orgId: string;
    idpId: string;
    code: string | undefined;
    expectedState: string | undefined;
    stateCookie: string | undefined;
    idp: { name: string };
    loginPageId?: number;
    providerError?: {
        error: string;
        description?: string | null;
        uri?: string | null;
    };
};

export default function ValidateOidcToken(props: ValidateOidcTokenParams) {
    const { env } = useEnvContext();
    const api = createApiClient({ env });
    const router = useRouter();

    const [loading, setLoading] = useState(true);
    const [error, setError] = useState<string | null>(null);
    const [isProviderError, setIsProviderError] = useState(false);

    const { licenseStatus, isLicenseViolation } = useLicenseStatusContext();

    const t = useTranslations();

    useEffect(() => {
        let isCancelled = false;

        async function runValidation() {
            setLoading(true);
            setIsProviderError(false);

            if (props.providerError?.error) {
                const providerMessage =
                    props.providerError.description ||
                    t("idpErrorOidcProviderRejected", {
                        error: props.providerError.error,
                        defaultValue:
                            "The identity provider returned an error: {error}."
                    });
                const suffix = props.providerError.uri
                    ? ` (${props.providerError.uri})`
                    : "";
                if (!isCancelled) {
                    setIsProviderError(true);
                    setError(`${providerMessage}${suffix}`);
                    setLoading(false);
                }
                return;
            }

            if (!props.code) {
                if (!isCancelled) {
                    setIsProviderError(false);
                    setError(
                        t("idpErrorOidcMissingCode", {
                            defaultValue:
                                "The identity provider did not return an authorization code."
                        })
                    );
                    setLoading(false);
                }
                return;
            }

            if (!props.expectedState || !props.stateCookie) {
                if (!isCancelled) {
                    setIsProviderError(false);
                    setError(
                        t("idpErrorOidcMissingState", {
                            defaultValue:
                                "The login request is missing state information. Please restart the login process."
                        })
                    );
                    setLoading(false);
                }
                return;
            }

            console.log(t("idpOidcTokenValidating"), {
                code: props.code,
                expectedState: props.expectedState,
                stateCookie: props.stateCookie
            });

            if (isLicenseViolation()) {
                await new Promise((resolve) => setTimeout(resolve, 5000));
            }

            try {
                const response = await validateOidcUrlCallbackProxy(
                    props.idpId,
                    props.code,
                    props.expectedState,
                    props.stateCookie,
                    props.loginPageId
                );

                if (response.error) {
                    if (!isCancelled) {
                        setIsProviderError(false);
                        setError(response.message);
                        setLoading(false);
                    }
                    return;
                }

                const data = response.data;
                if (!data) {
                    if (!isCancelled) {
                        setIsProviderError(false);
                        setError("Unable to validate OIDC token");
                        setLoading(false);
                    }
                    return;
                }

                const redirectUrl = data.redirectUrl;

                if (!redirectUrl) {
                    router.push(env.app.dashboardUrl);
                }

                if (!isCancelled) {
                    setIsProviderError(false);
                    setLoading(false);
                    await new Promise((resolve) => setTimeout(resolve, 100));
                }

                if (redirectUrl.startsWith("http")) {
                    window.location.href = data.redirectUrl; // this is validated by the parent using this component
                } else {
                    router.push(data.redirectUrl);
                }
            } catch (e: any) {
                console.error(e);
                if (!isCancelled) {
                    setIsProviderError(false);
                    setError(
                        t("idpErrorOidcTokenValidating", {
                            defaultValue:
                                "An unexpected error occurred. Please try again."
                        })
                    );
                }
            } finally {
                if (!isCancelled) {
                    setLoading(false);
                }
            }
        }

        runValidation();

        return () => {
            isCancelled = true;
        };
    }, []);

    return (
        <div className="flex items-center justify-center min-h-screen">
            <Card className="w-full max-w-md">
                <CardHeader>
                    <CardTitle>
                        {t("idpConnectingTo", { name: props.idp.name })}
                    </CardTitle>
                    <CardDescription>
                        {t("idpConnectingToDescription")}
                    </CardDescription>
                </CardHeader>
                <CardContent className="flex flex-col items-center space-y-4">
                    {loading && (
                        <div className="flex items-center space-x-2">
                            <Loader2 className="h-5 w-5 animate-spin" />
                            <span>{t("idpConnectingToProcess")}</span>
                        </div>
                    )}
                    {!loading && !error && (
                        <div className="flex items-center space-x-2 text-green-600">
                            <CheckCircle2 className="h-5 w-5" />
                            <span>{t("idpConnectingToFinished")}</span>
                        </div>
                    )}
                    {error && (
                        <Alert variant="destructive" className="w-full">
                            <AlertCircle className="h-5 w-5" />
                            <AlertDescription className="flex flex-col space-y-2">
                                <span className="text-sm font-medium">
                                    {isProviderError
                                        ? error
                                        : t("idpErrorConnectingTo", {
                                              name: props.idp.name
                                          })}
                                </span>
                                {!isProviderError && (
                                    <span className="text-xs">{error}</span>
                                )}
                            </AlertDescription>
                        </Alert>
                    )}
                </CardContent>
            </Card>
        </div>
    );
}