'use client';

import { useState } from 'react';
import { X, ArrowDownCircle, ArrowUpCircle } from 'lucide-react';
import { cn } from '@/lib/utils';

interface AuditLog {
  id: string;
  action: string;
  username?: string;
  timestamp: string;
  resolved_name: string;
  quantity_change?: number;
  target_snapshot?: string;
  details?: string;
}

interface LogsTableProps {
  logs: AuditLog[];
  loading: boolean;
}

export default function LogsTable({ logs, loading }: LogsTableProps) {
  const [selectedLog, setSelectedLog] = useState<AuditLog | null>(null);

  if (loading) {
    return (
      <div className="flex flex-col items-center justify-center py-32 text-secondary gap-4 animate-pulse">
        <div className="w-10 h-10 border-4 border-primary/20 border-t-primary rounded-full animate-spin" />
        <p className="text-xs font-normal tracking-widest italic">Securing Audit Stream...</p>
      </div>
    );
  }

  if (logs.length === 0) {
    return (
      <div className="bg-surface/20 border border-slate-800/50 border-dashed rounded-[2.5rem] py-20 flex flex-col items-center justify-center text-center gap-6">
        <div className="w-16 h-16 bg-surface rounded-2xl flex items-center justify-center text-slate-700 border border-slate-800">
          <ArrowDownCircle size={32} />
        </div>
        <div>
          <p className="text-xl font-normal text-secondary tracking-tight">No events found</p>
          <p className="text-xs text-secondary font-normal mt-1">Refine your strategic filters</p>
        </div>
      </div>
    );
  }

  return (
    <>
      <div className="grid gap-2.5">
        {logs.map((log) => (
          <button
            key={log.id}
            onClick={() => setSelectedLog(log)}
            className="w-full text-left bg-surface/50 border border-slate-800/30 p-3 px-4 rounded-2xl flex items-center justify-between gap-4 hover:bg-slate-800/40 hover:border-primary/30 transition-all group active:scale-[0.99] relative overflow-hidden shadow-sm"
          >
            <div className="flex-1 min-w-0 z-10 flex items-center gap-4">
              {/* Compact Action Badge */}
              <div className={cn(
                "text-[10px] font-normal px-3 py-1.5 rounded-lg border min-w-[85px] text-center tracking-tight",
                log.action.includes('CHECK_IN') ? "bg-green-500/10 text-green-500 border-green-500/20" :
                (log.action.includes('TRASH') ? "bg-rose-500/10 text-rose-500 border-rose-500/20" :
                 (log.action.includes('DB') ? "bg-sky-500/10 text-sky-400 border-sky-500/20" :
                  (log.action.includes('DELETE') ? "bg-red-500/10 text-red-500 border-red-500/30" :
                   (log.action.includes('CREATE') ? "bg-indigo-500/10 text-indigo-400 border-indigo-500/20" : "bg-primary/10 text-primary border-primary/20"))))
              )}>
                {log.action.replace('_', ' ')}
              </div>

              <div className="flex-1 min-w-0">
                <h3 className="card-title group-hover:text-primary transition-colors truncate">
                  {log.resolved_name}
                </h3>
                <div className="flex items-center gap-2">
                  <span className="card-subtitle mt-0 shrink-0">{log.username || 'System'}</span>
                  <span className="w-1 h-1 rounded-full bg-slate-800 shrink-0 mt-1" />
                  <span className="card-subtitle mt-0 lowercase opacity-80 truncate">
                    {new Date(log.timestamp).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })} · {new Date(log.timestamp).toLocaleDateString()}
                  </span>
                </div>
              </div>
            </div>

            <div className="shrink-0 flex items-center gap-3 z-10">
              <div className={cn(
                "text-lg font-normal tabular-nums min-w-[35px] text-right",
                (log.quantity_change || 0) > 0 ? "text-green-500" : ((log.quantity_change || 0) < 0 ? "text-rose-500" : "text-primary/50")
              )}>
                {log.quantity_change ? (log.quantity_change > 0 ? `+${log.quantity_change}` : log.quantity_change) : (log.action.includes('DB') ? 'SYS' : '±')}
              </div>
            </div>
          </button>
        ))}
      </div>

      {/* Selected Log Modal */}
      {selectedLog && (
        <div className="fixed inset-0 z-[100] flex items-end sm:items-center justify-center p-0 sm:p-4 bg-background/90 animate-in fade-in duration-300">
          <div className="bg-surface border-t sm:border border-slate-800 rounded-t-[2.5rem] sm:rounded-[3rem] p-6 sm:p-10 max-w-lg w-full shadow-2xl space-y-8 animate-in slide-in-from-bottom-10 duration-300 overflow-hidden">
            <div className="flex justify-between items-start">
              <div className="space-y-1 pr-4">
                <div className={cn(
                  "text-xs font-normal px-4 py-1.5 rounded-full border inline-block tracking-widest",
                  selectedLog.action.includes('CHECK_IN') ? "bg-green-500/10 text-green-500 border-green-500/30" :
                  (selectedLog.action.includes('TRASH') ? "bg-rose-500/10 text-rose-500 border-rose-500/30" : "bg-primary/10 text-primary border-primary/30")
                )}>
                  {selectedLog.action}
                </div>
                <h2 className="text-2xl font-normal text-white tracking-tight pt-2 leading-tight">
                  {selectedLog.resolved_name}
                </h2>
              </div>
              <button onClick={() => setSelectedLog(null)} className="p-3 bg-slate-800/50 hover:bg-slate-800 rounded-2xl text-muted transition-colors border border-slate-800 shrink-0 shadow-lg">
                <X size={20} />
              </button>
            </div>

            <div className="grid grid-cols-2 gap-4">
              <div className="space-y-1 bg-background/50 p-4 rounded-2xl border border-slate-800/50">
                <p className="text-[11px] font-normal text-muted tracking-widest">Protocol Operator</p>
                <p className="text-sm font-normal text-secondary">{selectedLog.username || 'Automated Process'}</p>
              </div>
              <div className="space-y-1 bg-background/50 p-4 rounded-2xl border border-slate-800/50">
                <p className="text-[11px] font-normal text-muted tracking-widest">Quantity Delta</p>
                <p className={cn(
                  "text-xl font-normal tabular-nums",
                  (selectedLog.quantity_change || 0) > 0 ? "text-green-500" : "text-rose-500"
                )}>
                  {selectedLog.quantity_change
                    ? `${selectedLog.quantity_change > 0 ? '+' : ''}${selectedLog.quantity_change}`
                    : (selectedLog.action.includes('DB') ? 'SYS' : '±')}
                </p>
              </div>
            </div>

            <div className="space-y-5">
              <div className="space-y-1">
                <p className="text-[11px] font-normal text-muted tracking-widest ml-1">Universal Timestamp</p>
                <p className="text-xs font-normal text-secondary bg-background/30 p-4 rounded-2xl border border-slate-800/30 tabular-nums">
                  {new Date(selectedLog.timestamp).toLocaleString(undefined, { dateStyle: 'full', timeStyle: 'medium' })}
                </p>
              </div>

              {selectedLog.target_snapshot && (() => {
                try {
                  const snap = JSON.parse(selectedLog.target_snapshot) as Record<string, any>;
                  return (
                    <div className="space-y-4 pt-2">
                      <div className="flex items-center gap-3">
                        <div className="h-px flex-1 bg-slate-800/50" />
                        <p className="text-[8px] font-normal text-slate-700 tracking-[0.2em]">Snapshot Record</p>
                        <div className="h-px flex-1 bg-slate-800/50" />
                      </div>
                      <div className="grid grid-cols-2 gap-2.5">
                        {Object.entries(snap).map(([key, val]) => (
                          (val && key !== 'image_url' && key !== 'id') ? (
                            <div key={key} className="bg-background/20 p-3 rounded-xl border border-slate-800/20">
                              <p className="text-[10px] font-normal text-muted mb-1 tracking-tight opacity-70">{key.replace('_', ' ')}</p>
                              <p className="text-xs font-normal text-secondary truncate" title={String(val)}>{String(val)}</p>
                            </div>
                          ) : null
                        ))}
                      </div>
                    </div>
                  );
                } catch (e) { return null; }
              })()}

              {selectedLog.details && (
                <div className="space-y-1.5">
                  <p className="text-[11px] font-normal text-muted tracking-widest ml-1">Intervention Details</p>
                  <div className="bg-primary/5 text-primary/80 p-5 rounded-3xl border border-primary/10 text-sm font-medium leading-relaxed italic shadow-inner">
                    "{selectedLog.details}"
                  </div>
                </div>
              )}
            </div>

            <button
              onClick={() => setSelectedLog(null)}
              className="w-full bg-slate-800 hover:bg-slate-700 text-white font-normal py-4.5 rounded-2xl transition-all active:scale-95 border border-slate-700 shadow-xl"
            >
              Close Audit Insight
            </button>
          </div>
        </div>
      )}
    </>
  );
}
