'use client'

import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import Link from 'next/link'
import api from '@app/api'
import { toast } from '@app/hooks/use-toast'
import { useCallback, useEffect, useState } from 'react';

type Step = 'org' | 'site' | 'resources'

export default function StepperForm() {
    const [currentStep, setCurrentStep] = useState<Step>('org')
    const [orgName, setOrgName] = useState('')
    const [orgId, setOrgId] = useState('')
    const [siteName, setSiteName] = useState('')
    const [resourceName, setResourceName] = useState('')
    const [orgCreated, setOrgCreated] = useState(false)
    const [orgIdTaken, setOrgIdTaken] = useState(false)

    const checkOrgIdAvailability = useCallback(async (value: string) => {
        try {
            const res = await api.get(`/org/checkId`, {
                params: {
                    orgId: value
                }
            })
            setOrgIdTaken(res.status !== 404)
        } catch (error) {
            console.error('Error checking org ID availability:', error)
            setOrgIdTaken(false)
        }
    }, [])

    const debouncedCheckOrgIdAvailability = useCallback(
        debounce(checkOrgIdAvailability, 300),
        [checkOrgIdAvailability]
    )

    useEffect(() => {
        if (orgId) {
            debouncedCheckOrgIdAvailability(orgId)
        }
    }, [orgId, debouncedCheckOrgIdAvailability])

    const showOrgIdError = () => {
        if (orgIdTaken) {
            return (
                <p className="text-sm text-red-500">
                    This ID is already taken. Please choose another.
                </p>
            );
        }
        return null;
    };

    const generateId = (name: string) => {
        return name.toLowerCase().replace(/\s+/g, '-')
    }

    const handleNext = async () => {
        if (currentStep === 'org') {

            const res = await api
                .put(`/org`, {
                    orgId: orgId,
                    name: orgName,
                })
                .catch((e) => {
                    toast({
                        title: "Error creating org..."
                    });
                });

            if (res && res.status === 201) {
                setCurrentStep('site')
                setOrgCreated(true)
            }

        }
        else if (currentStep === 'site') setCurrentStep('resources')
    }

    const handlePrevious = () => {
        if (currentStep === 'site') setCurrentStep('org')
        else if (currentStep === 'resources') setCurrentStep('site')
    }


    return (
        <div className="w-full max-w-2xl mx-auto p-6">
            <h2 className="text-2xl font-bold mb-6">Setup Your Environment</h2>
            <div className="mb-8">
                <div className="flex justify-between mb-2">
                    <div className="flex flex-col items-center">
                        <div className={`w-8 h-8 rounded-full flex items-center justify-center mb-2 ${currentStep === 'org' ? 'bg-primary text-primary-foreground' : 'bg-muted text-muted-foreground'}`}>
                            1
                        </div>
                        <span className={`text-sm font-medium ${currentStep === 'org' ? 'text-primary' : 'text-muted-foreground'}`}>Create Org</span>
                    </div>
                    <div className="flex flex-col items-center">
                        <div className={`w-8 h-8 rounded-full flex items-center justify-center mb-2 ${currentStep === 'site' ? 'bg-primary text-primary-foreground' : 'bg-muted text-muted-foreground'}`}>
                            2
                        </div>
                        <span className={`text-sm font-medium ${currentStep === 'site' ? 'text-primary' : 'text-muted-foreground'}`}>Create Site</span>
                    </div>
                    <div className="flex flex-col items-center">
                        <div className={`w-8 h-8 rounded-full flex items-center justify-center mb-2 ${currentStep === 'resources' ? 'bg-primary text-primary-foreground' : 'bg-muted text-muted-foreground'}`}>
                            3
                        </div>
                        <span className={`text-sm font-medium ${currentStep === 'resources' ? 'text-primary' : 'text-muted-foreground'}`}>Create Resources</span>
                    </div>
                </div>
                <div className="flex items-center">
                    <div className="flex-1 h-px bg-border"></div>
                    <div className="flex-1 h-px bg-border"></div>
                </div>
            </div>
            {currentStep === 'org' && (
                <div className="space-y-4">
                    <div className="space-y-2">
                        <Label htmlFor="orgName">Organization Name</Label>
                        <Input
                            id="orgName"
                            value={orgName}
                            onChange={(e) => { setOrgName(e.target.value); setOrgId(generateId(e.target.value)) }}
                            placeholder="Enter organization name"
                            required
                        />
                    </div>
                    <div className="space-y-2">
                        <Label htmlFor="orgId">Organization ID</Label>
                        <Input
                            id="orgId"
                            value={orgId}
                            onChange={(e) => setOrgId(e.target.value)}
                        />
                        {showOrgIdError()}
                        <p className="text-sm text-muted-foreground">
                            This ID is automatically generated from the organization name and must be unique.
                        </p>
                    </div>
                </div>
            )}
            {currentStep === 'site' && (
                <div className="space-y-6">
                    <div className="space-y-2">
                        <Label htmlFor="siteName">Site Name</Label>
                        <Input
                            id="siteName"
                            value={siteName}
                            onChange={(e) => setSiteName(e.target.value)}
                            placeholder="Enter site name"
                            required
                        />
                    </div>
                </div>
            )}
            {currentStep === 'resources' && (
                <div className="space-y-6">
                    <div className="space-y-2">
                        <Label htmlFor="resourceName">Resource Name</Label>
                        <Input
                            id="resourceName"
                            value={resourceName}
                            onChange={(e) => setResourceName(e.target.value)}
                            placeholder="Enter resource name"
                            required
                        />
                    </div>
                </div>
            )}
            <div className="flex justify-between pt-4">
                <Button
                    type="button"
                    variant="outline"
                    onClick={handlePrevious}
                    disabled={currentStep === 'org' || (currentStep === 'site' && orgCreated)}
                >
                    Previous
                </Button>
                <div className="flex items-center space-x-2">
                    {currentStep !== 'org' ? (
                        <Link
                            href={`/${orgId}/sites`}
                            className="text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70"
                        >
                            Skip for now
                        </Link>
                    ) : null}

                    <Button type="button" id="button" onClick={handleNext}>Create</Button>

                </div>

            </div>
        </div>
    )
}

function debounce<T extends (...args: any[]) => any>(
    func: T,
    wait: number
): (...args: Parameters<T>) => void {
    let timeout: NodeJS.Timeout | null = null

    return (...args: Parameters<T>) => {
        if (timeout) clearTimeout(timeout)

        timeout = setTimeout(() => {
            func(...args)
        }, wait)
    }
}