import React, { useEffect, useState } from 'react';
import { Head, usePage } from '@inertiajs/react';
import { router } from '@inertiajs/react';
import { Form, FormField } from '@admin/components/form';
import { Alert, AlertDescription } from '@admin/components/ui/alert';
import { Button } from '@admin/components/ui/button';
import { AlertTriangle, LoaderCircle } from 'lucide-react';
import LayoutDesign1 from './LoginLayouts/LayoutDesign1';
import LayoutDesign2 from './LoginLayouts/LayoutDesign2';
import LayoutDesign3 from './LoginLayouts/LayoutDesign3';
import type { LoginLayoutProps } from './LoginLayouts/types';

interface Props {
    readonly error?: string;
    readonly message?: string;
}

export default function Login({ error, message }: Props) {
    const page = usePage<any>();
    const [processing, setProcessing] = useState(false);

    const personalizer = (page.props as any).personalizer ?? {};
    const branding = personalizer.branding ?? {};
    const loginSettings = personalizer.login ?? {};
    const companySettings = (page.props as any).company_settings ?? {};

    const bannerUrl: string | null = loginSettings.login_banner || null;
    const iconUrl: string | null = branding.default_icon || loginSettings.login_icon || null;
    const logoUrl: string | null = branding.default_logo || loginSettings.login_logo || null;
    const faviconUrl: string | null = branding.default_favicon || null;
    const primaryColor: string = branding.primary_color ?? '#4f46e5';

    const appName: string = loginSettings.login_app_name || companySettings.app_name || 'Platform';
    const appDescription: string = loginSettings.login_app_description || companySettings.app_description || '';
    const loginTitle: string = loginSettings.login_title || 'Welcome back';
    const loginSubtitle: string = loginSettings.login_subtitle || 'Enter your credentials to sign in';
    const termsContent: string = loginSettings.terms_content || '';
    const privacyContent: string = loginSettings.privacy_content || '';
    const termsUrl: string | null = termsContent ? '/terms' : (loginSettings.terms_url || null);
    const privacyUrl: string | null = privacyContent ? '/privacy' : (loginSettings.privacy_url || null);
    const socialLoginEnabled: boolean = loginSettings.social_login_enabled ?? true;

    useEffect(() => {
        if (primaryColor) {
            document.documentElement.style.setProperty('--primary', primaryColor);
            document.documentElement.style.setProperty('--color-primary', primaryColor);
            document.documentElement.style.setProperty('--success', primaryColor);
            document.documentElement.style.setProperty('--color-success', primaryColor);
        }
        if (branding.secondary_color) {
            document.documentElement.style.setProperty('--secondary', branding.secondary_color);
            document.documentElement.style.setProperty('--color-secondary', branding.secondary_color);
        }
    }, [primaryColor, branding.secondary_color]);

    const formErrors = (page.props as any).errors ?? {};
    const hasAlert = error || message;

    const submitHandler = (values: any) => {
        setProcessing(true);
        router.post('/admin/login', values, {
            preserveScroll: true,
            onFinish: () => setProcessing(false),
        });
    };

    const alertNode = hasAlert ? (
        <Alert variant={error ? 'destructive' : 'default'}>
            {error && <AlertTriangle className="h-4 w-4" />}
            <AlertDescription>
                {error ?? message}
            </AlertDescription>
        </Alert>
    ) : null;

    const formNode = (
        <Form
            submitHandler={submitHandler}
            externalErrors={(page.props as any).errors}
            formClassNames="space-y-4"
        >
            <>
                <FormField
                    name="email"
                    label="Email address"
                    type="email"
                    placeholder="admin@example.com"
                    required
                />
                <FormField
                    name="password"
                    label="Password"
                    type="password"
                    placeholder="Enter your password"
                    required
                />
                <div className="flex items-center justify-between">
                    <FormField type="checkbox" name="remember" checkboxLabel="Remember me" />
                </div>
                <Button
                    type="submit"
                    disabled={processing}
                    className="w-full h-10 font-semibold"
                >
                    {processing ? (
                        <>
                            <LoaderCircle className="mr-2 h-4 w-4 animate-spin" />
                            Signing in...
                        </>
                    ) : (
                        'Sign in'
                    )}
                </Button>

                {socialLoginEnabled && (
                    <>
                        <div className="relative my-2">
                            <div className="absolute inset-0 flex items-center">
                                <div className="w-full border-t border-gray-200" />
                            </div>
                            <div className="relative flex justify-center text-xs">
                                <span className="bg-white px-3 text-gray-400 uppercase tracking-wider">or continue with</span>
                            </div>
                        </div>
                        <div className="grid grid-cols-2 gap-3">
                            <Button type="button" variant="outline" className="h-9 text-sm font-medium">
                                <svg className="mr-2 h-4 w-4" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
                                    <path d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z" fill="#4285F4" />
                                    <path d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z" fill="#34A853" />
                                    <path d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l3.66-2.84z" fill="#FBBC05" />
                                    <path d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z" fill="#EA4335" />
                                </svg>
                                Google
                            </Button>
                            <Button type="button" variant="outline" className="h-9 text-sm font-medium">
                                <svg className="mr-2 h-4 w-4" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" fill="currentColor">
                                    <path d="M12 0C5.374 0 0 5.373 0 12c0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23A11.509 11.509 0 0 1 12 5.803c1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576C20.566 21.797 24 17.3 24 12c0-6.627-5.373-12-12-12z" />
                                </svg>
                                GitHub
                            </Button>
                        </div>
                    </>
                )}

                {(termsUrl || privacyUrl || termsContent || privacyContent) && (
                    <p className="text-center text-xs text-gray-400 pt-1">
                        By signing in you agree to our{' '}
                        {termsUrl && (
                            <a href={termsUrl} target="_blank" rel="noopener noreferrer" className="underline hover:text-gray-600">
                                Terms of Service
                            </a>
                        )}
                        {termsUrl && privacyUrl && ' and '}
                        {privacyUrl && (
                            <a href={privacyUrl} target="_blank" rel="noopener noreferrer" className="underline hover:text-gray-600">
                                Privacy Policy
                            </a>
                        )}
                    </p>
                )}
            </>
        </Form>
    );

    const layoutProps: LoginLayoutProps = {
        bannerUrl,
        iconUrl,
        logoUrl,
        primaryColor,
        appName,
        appDescription,
        loginTitle,
        loginSubtitle,
        termsUrl,
        privacyUrl,
        socialLoginEnabled,
        alertNode,
        formNode,
    };

    const layout = loginSettings.admin_login_layout ?? 'layout1';

    return (
        <>
            <Head title="Admin Login">
                {faviconUrl && <link rel="icon" href={faviconUrl} />}
            </Head>
            {layout === 'layout2' && <LayoutDesign2 {...layoutProps} />}
            {layout === 'layout3' && <LayoutDesign3 {...layoutProps} />}
            {layout !== 'layout2' && layout !== 'layout3' && <LayoutDesign1 {...layoutProps} />}
        </>
    );
}