import React, { useState } from 'react'
import axios from 'axios'
import { toast } from 'react-hot-toast'
import { StockPosition, StockSection } from '@/types'

interface Props {
    onClose: () => void
    fromPosition?: StockPosition | null
    fromSection?: StockSection | null
    toPosition?: StockPosition | null
    toSection?: StockSection | null
}

const MoveSectionModal: React.FC<Props> = ({
                                               onClose,
                                               fromSection,
                                               toSection,
                                           }) => {
    const [loading, setLoading] = useState(false)

    const handleMove = async () => {
        if (!fromSection || !toSection) return
        setLoading(true)
        const toastId = toast.loading('Moving…')

        try {
            const { data } = await axios.post(
                '/api/pdaView/moveStockSection',
                {
                    entry_id:       fromSection.entries[0].id,
                    section_id:     fromSection.section_id,
                    new_section_id: toSection.section_id,
                    count:          fromSection.entries[0].pivot.count,
                },
                { withCredentials: true }
            )

            if (!data.success) {
                toast.dismiss(toastId)
                switch (data.error) {
                    case 'validation_failed':
                        toast.error('Validation failed. Check inputs.')
                        break
                    case 'not_found':
                        toast.error('Entry or section not found.')
                        break
                    case 'section_occupied':
                        toast.error('Target section is already occupied.')
                        break
                    case 'insufficient_capacity':
                        toast.error('Not enough capacity in target section.')
                        break
                    default:
                        toast.error(data.message ?? 'Server error during moving.')
                        break
                }
                setLoading(false)
                return
            }

            toast.dismiss(toastId)
            toast.success('Moved successfully.')
            onClose()
        } catch (err: any) {
            toast.dismiss()
            if (err.response && err.response.data) {
                const payload = err.response.data
                if (payload.error === 'validation_failed') {
                    toast.error('Validation failed. Check inputs.')
                } else if (payload.error === 'not_found') {
                    toast.error('Entry or section not found.')
                } else if (payload.error === 'section_occupied') {
                    toast.error('Target section is already occupied.')
                } else if (payload.error === 'insufficient_capacity') {
                    toast.error('Not enough capacity in target section.')
                } else {
                    toast.error(payload.message || 'Unknown error occurred.')
                }
            } else {
                if(fromSection.entries?.length <= 0) {
                    toast.error('No items in the FROM section.');
                }
                else {
                    toast.error('Network error. Please try again.');
                }
            }
            console.error('MoveSectionModal error:', err)
            setLoading(false)
        }
    }

    return (
        <div className="space-y-4">
            <h3 className="font-bold text-lg">Move Stock Item</h3>

            {!fromSection && (
                <div className="alert alert-info">
                    Please scan the <strong>TO</strong> section…
                </div>
            )}

            {fromSection && !toSection && (
                <div className="alert alert-info">
                    Scanned <strong>FROM:</strong> {fromSection.section_id}. Now scan the <strong>TO</strong> section…
                </div>
            )}

            {fromSection && toSection && (
                <div className="alert alert-success">
                    Ready to move from {fromSection.section_id} → {toSection.section_id}
                </div>
            )}

            <div className="flex space-x-2">
                <button
                    type="button"
                    className="btn btn-primary"
                    onClick={handleMove}
                    disabled={!fromSection || !toSection || loading}
                >
                    {loading ? 'Moving…' : 'Confirm Move'}
                </button>
                <button
                    type="button"
                    className="btn"
                    onClick={onClose}
                    disabled={loading}
                >
                    Cancel
                </button>
            </div>
        </div>
    )
}

export default MoveSectionModal