import React, { useState } from "react";
import {
  ShieldCheck,
  Key,
  FileCode,
  CheckCircle2,
  Plus,
  Clock,
  GitCommit,
  Save,
  Lock,
  Code,
} from "lucide-react";
import { CredentialRef, AuditLogEntry, SiteConfig } from "../types";

interface ConfigAndAuditTabProps {
  credentials: CredentialRef[];
  auditLogs: AuditLogEntry[];
  siteConfig: SiteConfig;
  onAddCredential: (
    name: string,
    type: CredentialRef["type"],
    val: string,
  ) => Promise<void>;
  onSaveSiteConfig: (rawYaml: string) => Promise<void>;
}

export const ConfigAndAuditTab: React.FC<ConfigAndAuditTabProps> = ({
  credentials,
  auditLogs,
  siteConfig,
  onAddCredential,
  onSaveSiteConfig,
}) => {
  const [activeSubTab, setActiveSubTab] = useState<
    "credentials" | "audit" | "yaml"
  >("yaml");
  const [yamlContent, setYamlContent] = useState(siteConfig.rawYaml);
  const [yamlSavedMsg, setYamlSavedMsg] = useState<string | null>(null);

  // New Credential Form
  const [showAddCredModal, setShowAddCredModal] = useState(false);
  const [credName, setCredName] = useState("");
  const [credType, setCredType] = useState<CredentialRef["type"]>("ssh_key");
  const [credVal, setCredVal] = useState("");

  const handleSaveYaml = async () => {
    try {
      await onSaveSiteConfig(yamlContent);
      setYamlSavedMsg(
        "Updated site.yaml successfully! Created Git commit on site-definition repository.",
      );
      setTimeout(() => setYamlSavedMsg(null), 4000);
    } catch (err: any) {
      alert(`YAML Save Error: ${err.message}`);
    }
  };

  const handleCreateCred = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!credName || !credVal) return;
    await onAddCredential(credName, credType, credVal);
    setShowAddCredModal(false);
    setCredName("");
    setCredVal("");
  };

  return (
    <div className="space-y-6">
      {/* HEADER */}
      <div className="bg-[#111111] rounded-sm border border-[#1F1F1F] p-6 shadow-xs flex flex-col md:flex-row md:items-center justify-between gap-4">
        <div>
          <div className="flex items-center space-x-2">
            <h1 className="text-xl font-serif italic text-white">
              System Settings & Audit
            </h1>
            <span className="px-2.5 py-0.5 rounded-xs text-[10px] uppercase font-bold tracking-widest bg-emerald-950/40 text-emerald-400 border border-emerald-500/20">
              Control Plane Configuration
            </span>
          </div>
          <p className="text-xs text-neutral-400 mt-1">
            Manage global site.yaml settings, secret credential references, and
            view system audit logs.
          </p>
        </div>
      </div>

      {/* SUB-TAB NAV */}
      <div className="flex border-b border-[#1F1F1F] space-x-6 text-xs font-semibold uppercase tracking-wider">
        <button
          onClick={() => setActiveSubTab("yaml")}
          className={`pb-3 transition-colors flex items-center space-x-2 border-b-2 ${
            activeSubTab === "yaml"
              ? "border-[#C5A059] text-[#C5A059]"
              : "border-transparent text-neutral-500 hover:text-neutral-300"
          }`}
        >
          <FileCode className="w-4 h-4" />
          <span>Declarative site.yaml (Git Commits)</span>
        </button>

        <button
          onClick={() => setActiveSubTab("credentials")}
          className={`pb-3 transition-colors flex items-center space-x-2 border-b-2 ${
            activeSubTab === "credentials"
              ? "border-[#C5A059] text-[#C5A059]"
              : "border-transparent text-neutral-500 hover:text-neutral-300"
          }`}
        >
          <Key className="w-4 h-4" />
          <span>Secret Credential References ({credentials.length})</span>
        </button>

        <button
          onClick={() => setActiveSubTab("audit")}
          className={`pb-3 transition-colors flex items-center space-x-2 border-b-2 ${
            activeSubTab === "audit"
              ? "border-[#C5A059] text-[#C5A059]"
              : "border-transparent text-neutral-500 hover:text-neutral-300"
          }`}
        >
          <Clock className="w-4 h-4" />
          <span>Audit Trail Log ({auditLogs.length})</span>
        </button>
      </div>

      {activeSubTab === "yaml" ? (
        <div className="space-y-4">
          {yamlSavedMsg && (
            <div className="p-4 bg-emerald-950/40 border border-emerald-500/20 text-emerald-300 text-xs rounded-sm flex items-center space-x-2">
              <CheckCircle2 className="w-4 h-4 text-emerald-400" />
              <span>{yamlSavedMsg}</span>
            </div>
          )}

          <div className="bg-[#111111] rounded-sm p-6 border border-[#1F1F1F] space-y-4">
            <div className="flex items-center justify-between text-white border-b border-[#1F1F1F] pb-3">
              <div className="flex items-center space-x-2">
                <Code className="w-5 h-5 text-[#C5A059]" />
                <span className="font-mono font-bold text-sm">/site.yaml</span>
                <span className="text-xs text-neutral-400">
                  Canonical Protocol Model
                </span>
              </div>

              <button
                onClick={handleSaveYaml}
                className="px-4 py-2 bg-[#C5A059] hover:bg-[#b38f4a] text-black rounded-sm text-xs font-semibold shadow-sm transition-all flex items-center space-x-1.5 uppercase tracking-wider"
              >
                <GitCommit className="w-3.5 h-3.5" />
                <span>Save & Commit to Git</span>
              </button>
            </div>

            <textarea
              rows={16}
              value={yamlContent}
              onChange={(e) => setYamlContent(e.target.value)}
              className="w-full bg-[#0A0A0A] text-[#C5A059] font-mono text-xs p-4 rounded-sm border border-[#1F1F1F] focus:outline-none focus:border-[#C5A059]"
            />
          </div>
        </div>
      ) : activeSubTab === "credentials" ? (
        <div className="space-y-4">
          <div className="flex justify-between items-center">
            <span className="text-[10px] font-bold text-neutral-500 uppercase tracking-widest">
              Secret Reference Vault
            </span>
            <button
              onClick={() => setShowAddCredModal(true)}
              className="px-3.5 py-1.5 bg-[#C5A059] hover:bg-[#b38f4a] text-black rounded-sm text-xs font-semibold flex items-center space-x-1 uppercase tracking-wider"
            >
              <Plus className="w-3.5 h-3.5" />
              <span>Store Secret Reference</span>
            </button>
          </div>

          <div className="grid grid-cols-1 md:grid-cols-3 gap-4 text-xs font-mono">
            {credentials.map((c) => (
              <div
                key={c.id}
                className="p-4 bg-[#111111] rounded-sm border border-[#1F1F1F] shadow-xs space-y-2"
              >
                <div className="flex items-center justify-between">
                  <span className="font-bold text-white text-sm truncate">
                    {c.name}
                  </span>
                  <Key className="w-4 h-4 text-[#C5A059] shrink-0" />
                </div>
                <div className="text-[11px] text-neutral-400 space-y-1">
                  <div>
                    Reference ID:{" "}
                    <code className="text-[#C5A059] font-bold">{c.id}</code>
                  </div>
                  <div>
                    Type:{" "}
                    <span className="uppercase text-neutral-500">{c.type}</span>
                  </div>
                  <div className="p-2 bg-[#0A0A0A] rounded-sm border border-[#1F1F1F] text-neutral-300 truncate font-mono text-[10px]">
                    {c.maskedValue}
                  </div>
                  <div className="pt-2 text-neutral-500 text-[10px] flex items-center justify-between">
                    <span>Used {c.usageCount} times</span>
                    <span>
                      Created: {new Date(c.createdAt).toLocaleDateString()}
                    </span>
                  </div>
                </div>
              </div>
            ))}
          </div>
        </div>
      ) : (
        /* AUDIT LOG TRAIL */
        <div className="bg-[#111111] rounded-sm border border-[#1F1F1F] p-6 shadow-xs space-y-4">
          <h2 className="text-base font-bold text-white">
            System Audit Trail Log
          </h2>

          <div className="bg-[#0A0A0A] text-neutral-200 font-mono text-xs rounded-sm p-4 border border-[#1F1F1F] space-y-2 max-h-[500px] overflow-y-auto">
            {auditLogs.map((log) => (
              <div
                key={log.id}
                className="py-2 border-b border-[#141414] last:border-0 flex items-start justify-between"
              >
                <div>
                  <div className="flex items-center space-x-2">
                    <span className="text-[#C5A059] font-bold">
                      [{log.category.toUpperCase()}]
                    </span>
                    <span className="text-white font-semibold">
                      {log.action}
                    </span>
                    <span className="text-[10px] text-emerald-400 bg-emerald-950/40 border border-emerald-500/20 px-1.5 py-0.5 rounded-xs font-mono uppercase font-bold">
                      {log.result}
                    </span>
                  </div>
                  <p className="text-neutral-400 text-[11px] mt-1">
                    {log.details}
                  </p>
                </div>
                <span className="text-neutral-500 text-[10px]">
                  {new Date(log.timestamp).toLocaleTimeString()}
                </span>
              </div>
            ))}
          </div>
        </div>
      )}

      {/* ADD CREDENTIAL MODAL */}
      {showAddCredModal && (
        <div className="fixed inset-0 bg-black/80 backdrop-blur-xs z-50 flex items-center justify-center p-4">
          <div className="bg-[#111111] rounded-sm border border-[#1F1F1F] max-w-md w-full p-6 shadow-2xl space-y-4">
            <div className="flex items-center justify-between border-b border-[#1F1F1F] pb-3">
              <h3 className="text-base font-bold text-white">
                Store New Secret Reference
              </h3>
              <button
                onClick={() => setShowAddCredModal(false)}
                className="text-neutral-500 hover:text-white text-xl leading-none"
              >
                &times;
              </button>
            </div>

            <form onSubmit={handleCreateCred} className="space-y-4 text-xs">
              <div>
                <label className="block font-semibold text-neutral-300 mb-1">
                  Secret Name
                </label>
                <input
                  type="text"
                  required
                  placeholder="e.g. Gitea Internal Deploy Key"
                  value={credName}
                  onChange={(e) => setCredName(e.target.value)}
                  className="w-full px-3 py-2 bg-[#0A0A0A] border border-[#1F1F1F] rounded-sm text-white placeholder-neutral-600 focus:outline-none focus:border-[#C5A059]"
                />
              </div>

              <div>
                <label className="block font-semibold text-neutral-300 mb-1">
                  Type
                </label>
                <select
                  value={credType}
                  onChange={(e) => setCredType(e.target.value as any)}
                  className="w-full px-3 py-2 bg-[#0A0A0A] border border-[#1F1F1F] rounded-sm text-white font-mono focus:outline-none focus:border-[#C5A059]"
                >
                  <option value="ssh_key">SSH Private Key</option>
                  <option value="token">OAuth / Deploy Token</option>
                  <option value="password">Password</option>
                </select>
              </div>

              <div>
                <label className="block font-semibold text-neutral-300 mb-1">
                  Secret Value (Encrypted at rest, never written to Git)
                </label>
                <textarea
                  rows={4}
                  required
                  placeholder="-----BEGIN OPENSSH PRIVATE KEY----- ..."
                  value={credVal}
                  onChange={(e) => setCredVal(e.target.value)}
                  className="w-full px-3 py-2 bg-[#0A0A0A] border border-[#1F1F1F] rounded-sm text-white font-mono focus:outline-none focus:border-[#C5A059]"
                />
              </div>

              <div className="flex items-center justify-end space-x-3 pt-3 border-t border-[#1F1F1F]">
                <button
                  type="button"
                  onClick={() => setShowAddCredModal(false)}
                  className="px-4 py-2 border border-[#222222] text-neutral-300 rounded-sm hover:bg-[#1A1A1A]"
                >
                  Cancel
                </button>
                <button
                  type="submit"
                  className="px-4 py-2 bg-[#C5A059] text-black font-semibold rounded-sm hover:bg-[#b38f4a] uppercase tracking-wider"
                >
                  Save Secret Reference
                </button>
              </div>
            </form>
          </div>
        </div>
      )}
    </div>
  );
};