import {
Globe,
Terminal as TerminalIcon,
Wifi
} from 'lucide-react';
import React,{ useMemo,useState } from 'react';
import { useI18n } from '../application/i18n/I18nProvider';
import { cn } from '../lib/utils';
import { Host,HostProtocol } from '../types';
import { DistroAvatar } from './DistroAvatar';
import { Button } from './ui/button';
import { Input } from './ui/input';

interface ProtocolOption {
    protocol: HostProtocol;
    port: number;
    label: string;
    icon: React.ReactNode;
    description: string;
    enabled: boolean;
}

interface ProtocolSelectDialogProps {
    host: Host;
    onSelect: (protocol: HostProtocol, port: number) => void;
    onCancel: () => void;
}

const ProtocolSelectDialog: React.FC<ProtocolSelectDialogProps> = ({
    host,
    onSelect,
    onCancel,
}) => {
    const { t } = useI18n();
    // Build protocol options from host configuration
    const protocolOptions = useMemo<ProtocolOption[]>(() => {
        const options: ProtocolOption[] = [];

        // SSH (always available if not explicitly disabled)
        const sshEnabled = host.protocol === 'ssh' || !host.protocol || host.protocols?.some(p => p.protocol === 'ssh' && p.enabled);
        if (sshEnabled !== false) {
            const sshConfig = host.protocols?.find(p => p.protocol === 'ssh');
            options.push({
                protocol: 'ssh',
                port: sshConfig?.port || host.port || 22,
                label: 'SSH',
                icon: <TerminalIcon size={18} />,
                description: `ssh ${host.hostname}`,
                enabled: true,
            });
        }

        // Mosh (if enabled)
        if (host.moshEnabled || host.protocols?.some(p => p.protocol === 'mosh' && p.enabled)) {
            const moshConfig = host.protocols?.find(p => p.protocol === 'mosh');
            options.push({
                protocol: 'mosh',
                port: moshConfig?.port || host.port || 22,
                label: 'Mosh',
                icon: <Wifi size={18} />,
                description: `mosh ${host.hostname}`,
                enabled: true,
            });
        }

        // Telnet (if enabled)
        if (host.telnetEnabled || host.protocol === 'telnet' || host.protocols?.some(p => p.protocol === 'telnet' && p.enabled)) {
            const telnetConfig = host.protocols?.find(p => p.protocol === 'telnet');
            options.push({
                protocol: 'telnet',
                port: telnetConfig?.port || host.telnetPort || 23,
                label: 'Telnet',
                icon: <Globe size={18} />,
                description: `telnet ${host.hostname}`,
                enabled: true,
            });
        }

        return options;
    }, [host]);

    // State for custom ports (allow editing inline)
    const [ports, setPorts] = useState<Record<HostProtocol, number>>(() => {
        const initial: Record<string, number> = {};
        protocolOptions.forEach(opt => {
            initial[opt.protocol] = opt.port;
        });
        return initial as Record<HostProtocol, number>;
    });

    const [selectedProtocol, setSelectedProtocol] = useState<HostProtocol>(
        protocolOptions[0]?.protocol || 'ssh'
    );

    const handlePortChange = (protocol: HostProtocol, value: string) => {
        const port = parseInt(value, 10);
        if (!isNaN(port) && port > 0 && port <= 65535) {
            setPorts(prev => ({ ...prev, [protocol]: port }));
        }
    };

    const handleContinue = () => {
        onSelect(selectedProtocol, ports[selectedProtocol] || 22);
    };

    // If only one protocol, auto-select and proceed
    React.useEffect(() => {
        if (protocolOptions.length === 1) {
            // Don't auto-proceed, let user confirm
        }
    }, [protocolOptions]);

    return (
        <div className="fixed inset-0 z-50 flex items-center justify-center" onClick={onCancel}>
            <div className="w-[560px] max-w-[90vw] bg-background border border-border rounded-2xl animate-in fade-in-0 zoom-in-95 duration-200" style={{ boxShadow: '0 25px 50px -12px rgba(0, 0, 0, 0.25), 0 12px 24px -8px rgba(0, 0, 0, 0.15)' }} onClick={(e) => e.stopPropagation()}>
                {/* Header */}
                <div className="px-6 py-5 border-b border-border/50">
                    <div className="flex items-center gap-3">
                        <DistroAvatar
                            host={host}
                            fallback={host.label.slice(0, 2).toUpperCase()}
                            className="h-12 w-12"
                        />
                        <div>
                            <h2 className="text-base font-semibold">{host.label}</h2>
                            <p className="text-xs text-muted-foreground font-mono">
                                {host.hostname}
                            </p>
                        </div>
                    </div>
                </div>

                {/* Progress indicator */}
                <div className="px-6 py-4">
                    <div className="flex items-center gap-3">
                        <div className="h-8 w-8 rounded-full bg-primary/20 text-primary flex items-center justify-center">
                            <TerminalIcon size={14} />
                        </div>
                        <div className="flex-1 h-0.5 bg-muted" />
                        <div className="h-8 w-8 rounded-full bg-muted text-muted-foreground flex items-center justify-center text-xs font-mono">
                            {'>_'}
                        </div>
                    </div>
                </div>

                {/* Protocol selection */}
                <div className="px-6 py-4 space-y-4">
                    <h3 className="text-base font-semibold">{t("protocolSelect.chooseProtocol")}</h3>
                    <div className="space-y-3">
                        {protocolOptions.map((option) => (
                            <button
                                key={option.protocol}
                                className={cn(
                                    "w-full flex items-center justify-between px-4 py-3 rounded-xl border-2 transition-all text-left",
                                    selectedProtocol === option.protocol
                                        ? "border-primary bg-primary/5"
                                        : "border-border/60 hover:border-border hover:bg-secondary/50"
                                )}
                                onClick={() => setSelectedProtocol(option.protocol)}
                            >
                                <div className="flex items-center gap-3">
                                    <div className={cn(
                                        "h-10 w-10 rounded-lg flex items-center justify-center",
                                        selectedProtocol === option.protocol
                                            ? "bg-primary/20 text-primary"
                                            : "bg-muted text-muted-foreground"
                                    )}>
                                        {option.icon}
                                    </div>
                                    <div>
                                        <div className="font-medium">{option.label}</div>
                                        <div className="text-xs text-muted-foreground font-mono">
                                            {option.description}
                                        </div>
                                    </div>
                                </div>
                                <div className="flex items-center gap-2">
                                    <span className="text-xs text-muted-foreground">{t("protocolSelect.port")}</span>
                                    <Input
                                        type="number"
                                        value={ports[option.protocol] || option.port}
                                        onChange={(e) => handlePortChange(option.protocol, e.target.value)}
                                        onClick={(e) => {
                                            e.stopPropagation();
                                            setSelectedProtocol(option.protocol);
                                        }}
                                        className="w-16 h-7 text-xs text-center"
                                        min={1}
                                        max={65535}
                                    />
                                </div>
                            </button>
                        ))}
                    </div>
                </div>

                {/* Footer */}
                <div className="px-6 py-4 border-t border-border/50 flex items-center justify-between">
                    <Button variant="secondary" onClick={onCancel}>
                        {t("common.close")}
                    </Button>
                    <Button onClick={handleContinue}>
                        {t("common.continue")}
                    </Button>
                </div>
            </div>
        </div>
    );
};

export default ProtocolSelectDialog;