import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import InputError from '@/components/InputError';
import { useForm } from '@inertiajs/react';
import { todayISO } from '@/lib/utils';
import { LoaderCircle } from 'lucide-react';
import { FormEventHandler, useEffect, useState } from 'react';
import ComponentTitle from '@/components/ui/ComponentTitle';

interface EntryFormData {
    date: string;
    quantity: string;
    unit_price: string;
    total_cost: string;
    [key: string]: string;
}

interface AddEntryFormProps {
    unit?: string;
    priceTrackingEnabled?: boolean;
    onSuccess?: () => void;
    onCancel?: () => void;
}

interface EntrySummary {
    total_quantity: number;
    total_cost: number;
    average_cost_per_unit: number;
}

export default function AddEntryForm({ unit = 'units', priceTrackingEnabled = false, onSuccess, onCancel }: AddEntryFormProps) {
    const { data, setData, post, processing, errors, reset } = useForm<EntryFormData>({
        date: todayISO(),
        quantity: '',
        unit_price: '',
        total_cost: '',
    });

    const [currentHoldings, setCurrentHoldings] = useState<EntrySummary | null>(null);

    useEffect(() => {
        const fetchSummary = async () => {
            try {
                const response = await fetch('/entries/summary');
                if (response.ok) {
                    const summary = await response.json();
                    setCurrentHoldings(summary);
                }
            } catch (error) {
                console.error('Failed to fetch entry summary:', error);
            }
        };

        fetchSummary();
    }, []);

    // Auto-calculate total cost when quantity or unit_price changes
    useEffect(() => {
        if (data.quantity && data.unit_price) {
            const quantity = parseFloat(data.quantity);
            const unitPrice = parseFloat(data.unit_price);

            if (!isNaN(quantity) && !isNaN(unitPrice)) {
                setData('total_cost', (quantity * unitPrice).toFixed(2));
            }
        }
    }, [data.quantity, data.unit_price, setData]);

    const submit: FormEventHandler = (e) => {
        e.preventDefault();

        post(route('entries.store'), {
            onSuccess: () => {
                reset();
                setData('date', todayISO());
                if (onSuccess) onSuccess();
            },
        });
    };

    return (
        <div className="w-full">
            <div className="space-y-4">
                <ComponentTitle>ADD ENTRY</ComponentTitle>
                {currentHoldings && currentHoldings.total_quantity > 0 && (
                    <p className="text-sm text-red-400/60 font-mono">
                        [CURRENT] {currentHoldings.total_quantity.toFixed(6)} {unit}
                        {priceTrackingEnabled && ` • €${currentHoldings.total_cost.toFixed(2)} spent`}
                    </p>
                )}
                <form onSubmit={submit} className="space-y-4">
                    <div>
                        <Label htmlFor="date" className="text-red-400 font-mono text-xs uppercase tracking-wider">&gt; Date</Label>
                        <Input
                            id="date"
                            type="date"
                            value={data.date}
                            onChange={(e) => setData('date', e.target.value)}
                            max={todayISO()}
                            className="bg-black border-red-500 text-red-400 focus:border-red-300 font-mono text-sm rounded-none border-2 focus:ring-0 focus:outline-none transition-all glow-red"
                        />
                        <InputError message={errors.date} />
                    </div>

                    <div>
                        <Label htmlFor="quantity" className="text-red-400 font-mono text-xs uppercase tracking-wider">
                            &gt; Quantity ({unit})
                        </Label>
                        <Input
                            id="quantity"
                            type="number"
                            step="0.000001"
                            min="0"
                            placeholder="1.234567"
                            value={data.quantity}
                            onChange={(e) => setData('quantity', e.target.value)}
                            className="bg-black border-red-500 text-red-400 focus:border-red-300 font-mono text-sm rounded-none border-2 focus:ring-0 focus:outline-none placeholder:text-red-400/40 transition-all glow-red"
                        />
                        <InputError message={errors.quantity} />
                    </div>

                    {priceTrackingEnabled && (
                        <>
                            <div>
                                <Label htmlFor="unit_price" className="text-red-400 font-mono text-xs uppercase tracking-wider">&gt; Price per {unit} (€)</Label>
                                <Input
                                    id="unit_price"
                                    type="number"
                                    step="0.01"
                                    min="0"
                                    placeholder="123.45"
                                    value={data.unit_price}
                                    onChange={(e) => setData('unit_price', e.target.value)}
                                    className="bg-black border-red-500 text-red-400 focus:border-red-300 font-mono text-sm rounded-none border-2 focus:ring-0 focus:outline-none placeholder:text-red-400/40 transition-all glow-red"
                                />
                                <InputError message={errors.unit_price} />
                            </div>

                            <div>
                                <Label htmlFor="total_cost" className="text-red-400 font-mono text-xs uppercase tracking-wider">&gt; Total Cost (€)</Label>
                                <Input
                                    id="total_cost"
                                    type="number"
                                    step="0.01"
                                    min="0"
                                    placeholder="1234.56"
                                    value={data.total_cost}
                                    onChange={(e) => setData('total_cost', e.target.value)}
                                    className="bg-black border-red-500 text-red-400 focus:border-red-300 font-mono text-sm rounded-none border-2 focus:ring-0 focus:outline-none placeholder:text-red-400/40 transition-all glow-red"
                                />
                                <p className="text-xs text-red-400/60 mt-1 font-mono">[AUTO-CALC] quantity × price</p>
                                <InputError message={errors.total_cost} />
                            </div>
                        </>
                    )}

                    <div className="flex gap-3 pt-2">
                        <Button
                            type="submit"
                            disabled={processing}
                            className="flex-1 bg-red-500 hover:bg-red-500 text-black font-mono text-sm font-bold border-red-500 rounded-none border-2 uppercase tracking-wider transition-all glow-red"
                        >
                            {processing && <LoaderCircle className="mr-2 h-4 w-4 animate-spin" />}
                            [EXECUTE]
                        </Button>
                        {onCancel && (
                            <Button
                                type="button"
                                variant="outline"
                                onClick={onCancel}
                                className="flex-1 bg-black border-red-500 text-red-400 hover:bg-red-950 hover:text-red-300 font-mono text-sm font-bold rounded-none border-2 uppercase tracking-wider transition-all glow-red"
                            >
                                [ABORT]
                            </Button>
                        )}
                    </div>
                </form>
            </div>
        </div>
    );
}