"use client";

import { useState } from 'react';
import { useAuth } from '@/contexts/AuthContext';
import { useApi } from '@/hooks/use-api';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Copy, KeyRound, Server, User, Check } from 'lucide-react';
import {
    AlertDialog,
    AlertDialogAction,
    AlertDialogCancel,
    AlertDialogContent,
    AlertDialogDescription,
    AlertDialogFooter,
    AlertDialogHeader,
    AlertDialogTitle,
    AlertDialogTrigger,
} from "@/components/ui/alert-dialog"
import { Skeleton } from '@/components/ui/skeleton';

function CredentialRow({ icon, label, value, onCopy, isCopied }) {
    return (
        <div className="flex items-center justify-between bg-gray-900 p-3 rounded-lg border border-gray-800">
            <div className="flex items-center gap-3">
                {icon}
                <div>
                    <div className="text-xs text-gray-400">{label}</div>
                    <code className="text-white">{value}</code>
                </div>
            </div>
            <Button variant="ghost" size="icon" onClick={onCopy}>
                {isCopied ? <Check className="h-4 w-4 text-green-500" /> : <Copy className="h-4 w-4" />}
            </Button>
        </div>
    );
}

export function SipCredentialsCard({ details, loading, refetchDetails }) {
    const { token } = useAuth();
    const apiFetch = useApi();
    const [newSecret, setNewSecret] = useState(null);
    const [isResetting, setIsResetting] = useState(false);
    const [copiedState, setCopiedState] = useState({});

    const handleResetSecret = async () => {
        if (!token) return;
        setIsResetting(true);
        try {
            const res = await apiFetch(`${process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3001'}/extensions/me/resetsecret`, {
                method: 'POST',
            });
            const data = await res.json();
            setNewSecret(data.newSecret);
            if (refetchDetails) {
                refetchDetails();
            }
        } catch (error) {
            if (error.message !== 'Unauthorized') {
                console.error("Failed to reset secret", error);
                alert('Failed to reset secret.');
            }
        } finally {
            setIsResetting(false);
        }
    };

    const copyToClipboard = (text, id) => {
        if (!text) return;
        navigator.clipboard.writeText(text).then(() => {
            setCopiedState(prev => ({ ...prev, [id]: true }));
            setTimeout(() => {
                setCopiedState(prev => ({ ...prev, [id]: false }));
            }, 2000);
        });
    };

    if (loading) {
        return (
            <Card className="bg-gray-950/50 border-gray-800">
                <CardHeader>
                    <Skeleton className="h-6 w-48" />
                    <Skeleton className="h-4 w-64 mt-2" />
                </CardHeader>
                <CardContent className="space-y-4 pt-4">
                    <Skeleton className="h-12 w-full" />
                    <Skeleton className="h-12 w-full" />
                    <Skeleton className="h-12 w-full" />
                    <Skeleton className="h-10 w-full" />
                </CardContent>
            </Card>
        );
    }

    return (
        <Card className="bg-gray-950/50 border-gray-800">
            <CardHeader>
                <CardTitle>SIP Credentials</CardTitle>
                <CardDescription>Use these details to connect your SIP client.</CardDescription>
            </CardHeader>
            <CardContent className="space-y-4">
                <CredentialRow icon={<Server className="h-5 w-5 text-gray-400" />} label="SIP Server" value="pbx.litenet.tel" onCopy={() => copyToClipboard('pbx.litenet.tel', 'server')} isCopied={copiedState['server']} />
                <CredentialRow icon={<User className="h-5 w-5 text-gray-400" />} label="SIP Username" value={details?.extensionId} onCopy={() => copyToClipboard(details?.extensionId, 'username')} isCopied={copiedState['username']} />
                <CredentialRow icon={<KeyRound className="h-5 w-5 text-gray-400" />} label="SIP Secret" value="••••••••••••" onCopy={() => copyToClipboard(details?.user?.extPassword, 'secret')} isCopied={copiedState['secret']} />
                
                <Dialog open={!!newSecret} onOpenChange={(open) => { if (!open) { setNewSecret(null); setCopiedState(prev => ({ ...prev, newSecret: false })); } }}>
                    <AlertDialog>
                        <AlertDialogTrigger asChild>
                            <Button variant="destructive" disabled={isResetting} className="w-full">
                                <KeyRound className="h-4 w-4 mr-2" />
                                {isResetting ? 'Resetting...' : 'Reset SIP Secret'}
                            </Button>
                        </AlertDialogTrigger>
                        <AlertDialogContent className="bg-gray-950 border-gray-800 text-white">
                            <AlertDialogHeader>
                                <AlertDialogTitle>Are you absolutely sure?</AlertDialogTitle>
                                <AlertDialogDescription className="text-gray-400">
                                    Resetting your SIP secret will require you to update it on all devices registered to this extension. This action cannot be undone.
                                </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                                <AlertDialogCancel className="border-gray-700 hover:bg-gray-800">Cancel</AlertDialogCancel>
                                <AlertDialogAction
                                    className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
                                    onClick={handleResetSecret}
                                >
                                    Continue
                                </AlertDialogAction>
                            </AlertDialogFooter>
                        </AlertDialogContent>
                    </AlertDialog>
                    <DialogContent className="bg-gray-950 border-gray-800 text-white">
                        <DialogHeader>
                            <DialogTitle>Secret Reset Successfully</DialogTitle>
                            <DialogDescription className="text-gray-400">
                                Your new SIP secret is shown below. Copy it now, as you will not be able to see it again.
                            </DialogDescription>
                        </DialogHeader>
                        <div className="flex items-center space-x-2 bg-black p-3 rounded-md border border-gray-700">
                            <code className="text-lg font-mono flex-grow text-green-400">{newSecret}</code>
                            <Button variant="ghost" size="icon" onClick={() => copyToClipboard(newSecret, 'newSecret')}>
                                {copiedState['newSecret'] ? <Check className="h-4 w-4 text-green-500" /> : <Copy className="h-4 w-4" />}
                            </Button>
                        </div>
                    </DialogContent>
                </Dialog>
            </CardContent>
        </Card>
    );
}