import React, { useState } from 'react';
import { Head, router } from '@inertiajs/react';
import AdminLayout from '@/Layouts/AdminLayout';
import { 
    Plus, 
    Search, 
    GripVertical, 
    Edit2, 
    Trash2, 
    Info,
    Wrench
} from 'lucide-react';
import {
    Table,
    TableBody,
    TableCell,
    TableHead,
    TableHeader,
    TableRow,
} from '@/components/ui/table';
import {
    Dialog,
    DialogContent,
    DialogHeader,
    DialogTitle,
    DialogFooter,
} from "@/components/ui/dialog";

export default function WorkerSkills({ skills }) {
    const [searchTerm, setSearchTerm] = useState('');
    const [isDialogOpen, setIsDialogOpen] = useState(false);
    const [editingSkill, setEditingSkill] = useState(null);
    const [skillName, setSkillName] = useState('');
    const [imageFile, setImageFile] = useState(null);
    const [error, setError] = useState('');

    const handleOpenAdd = () => {
        setEditingSkill(null);
        setSkillName('');
        setImageFile(null);
        setError('');
        setIsDialogOpen(true);
    };

    const handleOpenEdit = (skill) => {
        setEditingSkill(skill);
        setSkillName(skill.name);
        setImageFile(null);
        setError('');
        setIsDialogOpen(true);
    };

    const handleSubmit = (e) => {
        e.preventDefault();
        if (!skillName.trim()) {
            setError('Skill name is required.');
            return;
        }

        const formData = {
            name: skillName.trim()
        };
        if (imageFile) {
            formData.image = imageFile;
        }

        if (editingSkill) {
            router.post(`/admin/master-data/skills/${editingSkill.id}/update`, formData, {
                onSuccess: () => {
                    setIsDialogOpen(false);
                    setImageFile(null);
                },
                onError: (err) => {
                    setError(err.name || 'Failed to update skill.');
                }
            });
        } else {
            router.post('/admin/master-data/skills', formData, {
                onSuccess: () => {
                    setIsDialogOpen(false);
                    setImageFile(null);
                },
                onError: (err) => {
                    setError(err.name || 'Failed to add skill.');
                }
            });
        }
    };

    const handleDelete = (id) => {
        if (confirm('Are you sure you want to delete this skill? It will be removed from all associated worker profiles.')) {
            router.delete(`/admin/master-data/skills/${id}`);
        }
    };

    const filteredSkills = skills.filter(skill => 
        skill.name.toLowerCase().includes(searchTerm.toLowerCase())
    );

    return (
        <AdminLayout title="Worker Skills">
            <Head title="Master Data - Skills" />

            <div className="max-w-4xl mx-auto space-y-6">
                {/* Header Actions */}
                <div className="flex flex-col sm:flex-row sm:items-center justify-between gap-4">
                    <div className="relative flex-1 max-w-sm">
                        <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-slate-400" />
                        <input 
                            type="text" 
                            placeholder="Find skill..." 
                            value={searchTerm}
                            onChange={e => setSearchTerm(e.target.value)}
                            className="w-full pl-10 pr-4 py-2.5 bg-white border border-slate-200 rounded-xl text-sm font-medium focus:ring-4 focus:ring-teal-500/10 outline-none transition-all"
                        />
                    </div>
                    <button 
                        onClick={handleOpenAdd}
                        className="bg-[#0F6E56] text-white px-6 py-2.5 rounded-xl text-sm font-bold flex items-center justify-center space-x-2 hover:bg-[#085041] transition-all shadow-lg shadow-teal-500/10 cursor-pointer"
                    >
                        <Plus className="w-4 h-4" />
                        <span>Add Skill</span>
                    </button>
                </div>

                {/* Skills Card */}
                <div className="bg-white rounded-[24px] border border-slate-200 shadow-sm overflow-hidden">
                    <div className="p-6 border-b border-slate-50 bg-slate-50/30">
                        <div className="flex items-center space-x-3">
                            <div className="p-2 bg-teal-50 rounded-lg">
                                <Wrench className="w-5 h-5 text-[#0F6E56]" />
                            </div>
                            <div>
                                <h2 className="text-sm font-black text-slate-900 uppercase tracking-tight">Worker Skills</h2>
                                <p className="text-[10px] text-slate-400 font-bold uppercase tracking-widest mt-0.5">Manage skills workers can choose for their profiles</p>
                            </div>
                        </div>
                    </div>

                    <Table>
                        <TableHeader>
                            <TableRow className="bg-white hover:bg-white">
                                <TableHead className="w-12"></TableHead>
                                <TableHead className="font-bold text-slate-400 text-[10px] uppercase tracking-widest h-12">Skill Name</TableHead>
                                <TableHead className="font-bold text-slate-400 text-[10px] uppercase tracking-widest h-12">Worker Count</TableHead>
                                <TableHead className="font-bold text-slate-400 text-[10px] uppercase tracking-widest h-12">Status</TableHead>
                                <TableHead className="font-bold text-slate-400 text-[10px] uppercase tracking-widest h-12 text-right pr-6">Action</TableHead>
                            </TableRow>
                        </TableHeader>
                        <TableBody>
                            {filteredSkills.length > 0 ? (
                                filteredSkills.map((skill) => (
                                    <TableRow key={skill.id} className="hover:bg-slate-50/50 transition-colors group">
                                        <TableCell className="pl-4">
                                            <GripVertical className="w-4 h-4 text-slate-300 cursor-grab active:cursor-grabbing" />
                                        </TableCell>
                                        <TableCell className="py-4 font-bold text-slate-900 text-sm capitalize">
                                            <div className="flex items-center space-x-3">
                                                {skill.image_url ? (
                                                    <img src={skill.image_url} alt={skill.name} className="w-10 h-10 object-cover rounded-xl border border-slate-100 shadow-xs" />
                                                ) : (
                                                    <div className="w-10 h-10 bg-slate-50 border border-slate-100 rounded-xl flex items-center justify-center text-slate-400 text-xs font-bold uppercase">
                                                        {skill.name.charAt(0)}
                                                    </div>
                                                )}
                                                <span>{skill.name}</span>
                                            </div>
                                        </TableCell>
                                        <TableCell>
                                            <div className="flex items-center space-x-2">
                                                <span className="text-sm font-black text-slate-600">{skill.worker_count}</span>
                                                <span className="text-[10px] font-bold text-slate-400 uppercase">Workers</span>
                                            </div>
                                        </TableCell>
                                        <TableCell>
                                            <span className="inline-flex items-center px-2 py-0.5 bg-emerald-50 text-emerald-600 rounded text-[10px] font-black uppercase tracking-tight">
                                                {skill.status}
                                            </span>
                                        </TableCell>
                                        <TableCell className="text-right pr-6">
                                            <div className="flex items-center justify-end space-x-1 opacity-0 group-hover:opacity-100 transition-opacity">
                                                <button 
                                                    onClick={() => handleOpenEdit(skill)}
                                                    className="p-2 text-slate-400 hover:text-[#0F6E56] hover:bg-teal-50 rounded-lg transition-all cursor-pointer"
                                                >
                                                    <Edit2 className="w-4 h-4" />
                                                </button>
                                                <button 
                                                    onClick={() => handleDelete(skill.id)}
                                                    className="p-2 text-slate-400 hover:text-rose-500 hover:bg-rose-50 rounded-lg transition-all cursor-pointer"
                                                >
                                                    <Trash2 className="w-4 h-4" />
                                                </button>
                                            </div>
                                        </TableCell>
                                    </TableRow>
                                ))
                            ) : (
                                <TableRow>
                                    <TableCell colSpan={5} className="py-8 text-center text-slate-400 font-bold text-xs">
                                        No skills match your search.
                                    </TableCell>
                                </TableRow>
                            )}
                        </TableBody>
                    </Table>

                    <div className="p-6 bg-slate-50/50 border-t border-slate-100">
                        <div className="flex items-start space-x-3 text-slate-400">
                            <Info className="w-4 h-4 shrink-0 mt-0.5" />
                            <p className="text-[10px] font-bold uppercase tracking-wide leading-relaxed">
                                Tip: These skills are populated in the mobile application configuration so workers can select their specific expertise when setting up or updating their profiles.
                            </p>
                        </div>
                    </div>
                </div>
            </div>

            {/* Skill Modal */}
            <Dialog open={isDialogOpen} onOpenChange={setIsDialogOpen}>
                <DialogContent className="sm:max-w-[400px] rounded-[24px] bg-white">
                    <DialogHeader>
                        <DialogTitle className="text-xl font-black text-slate-900 tracking-tight">
                            {editingSkill ? 'Edit Skill' : 'New Skill'}
                        </DialogTitle>
                    </DialogHeader>
                    
                    <form onSubmit={handleSubmit} className="space-y-4">
                        <div className="py-4 space-y-4">
                            <div className="space-y-2">
                                <label className="text-[10px] font-black text-slate-400 uppercase tracking-widest ml-1">Skill Name</label>
                                <input 
                                    className="w-full px-4 py-3 bg-slate-50 border border-slate-100 rounded-xl text-sm font-bold focus:ring-4 focus:ring-teal-500/10 outline-none" 
                                    placeholder="e.g. cooking" 
                                    value={skillName}
                                    onChange={e => setSkillName(e.target.value)}
                                />
                                {error && (
                                    <p className="text-xs text-rose-600 font-bold ml-1">{error}</p>
                                )}
                            </div>

                            <div className="space-y-2">
                                <label className="text-[10px] font-black text-slate-400 uppercase tracking-widest ml-1">Skill Image</label>
                                {editingSkill && editingSkill.image_url && !imageFile && (
                                    <div className="flex items-center space-x-3 mb-2 p-2 bg-slate-50 rounded-xl border border-slate-100">
                                        <img src={editingSkill.image_url} alt="Current" className="w-12 h-12 object-cover rounded-xl" />
                                        <span className="text-xs font-bold text-slate-500">Current Image</span>
                                    </div>
                                )}
                                <input 
                                    type="file"
                                    accept="image/*"
                                    onChange={e => setImageFile(e.target.files[0])}
                                    className="w-full text-xs text-slate-500 file:mr-4 file:py-2.5 file:px-4 file:rounded-xl file:border-0 file:text-xs file:font-black file:uppercase file:bg-teal-50 file:text-[#0F6E56] hover:file:bg-teal-100 cursor-pointer"
                                />
                            </div>
                        </div>

                        <DialogFooter className="sm:justify-end gap-3 pt-4 border-t border-slate-100">
                            <button 
                                type="button"
                                onClick={() => setIsDialogOpen(false)}
                                className="px-6 py-2.5 rounded-xl text-sm font-bold text-slate-400 uppercase tracking-widest hover:bg-slate-50 transition-colors"
                            >
                                Cancel
                            </button>
                            <button 
                                type="submit"
                                className="bg-[#0F6E56] text-white px-8 py-2.5 rounded-xl text-sm font-bold uppercase tracking-widest shadow-lg shadow-teal-500/20 active:scale-95 transition-all cursor-pointer"
                            >
                                {editingSkill ? 'Update' : 'Add Skill'}
                            </button>
                        </DialogFooter>
                    </form>
                </DialogContent>
            </Dialog>
        </AdminLayout>
    );
}
