"use client";

import React from "react";
import { Bot, Cpu, Zap, ShieldCheck } from "lucide-react";
import { Card, CardBody, CardHeader, CardTitle } from "@/components/ui/Card";
import { Badge, JobStatusBadge } from "@/components/ui/Badge";
import { EmptyState } from "@/components/ui/EmptyState";
import { MetricCard } from "@/components/ui/MetricCard";

export default function AiAgentsPage() {
  return (
    <div className="p-6 lg:p-8 max-w-[1400px] mx-auto">
      <header className="mb-6 flex flex-wrap items-start justify-between gap-3">
        <div>
          <div className="flex items-center gap-2">
            <h1 className="text-2xl font-semibold tracking-tight text-slate-900 flex items-center gap-2">
              <Bot className="w-6 h-6 text-accent" />
              AI Agents
            </h1>
            <Badge tone="violet">α · Alpha</Badge>
          </div>
          <p className="mt-1 text-sm text-slate-500">
            ASF AI Gateway — provider-agnostic inference, policy routing and usage metering. Interfaces are ready, runtime behaviors are stabilizing.
          </p>
        </div>
        <div className="flex items-center gap-2">
          <Badge tone="brand"><Cpu className="w-3 h-3" /> Gateway abstraction OK</Badge>
          <Badge tone="green"><ShieldCheck className="w-3 h-3" /> No provider lock-in</Badge>
        </div>
      </header>

      <section className="grid grid-cols-2 md:grid-cols-4 gap-4 mb-6">
        <MetricCard label="Models routable" value={6} tone="violet" icon={<Bot className="w-5 h-5" />} subtitle="NVIDIA DGX · OpenAI compat · local" />
        <MetricCard label="Active AI jobs" value={5} tone="brand" icon={<Zap className="w-5 h-5" />} delta={2.1} />
        <MetricCard label="Tenant policies" value={2} tone="green" icon={<ShieldCheck className="w-5 h-5" />} subtitle="Cost ceilings, model allowlists" />
        <MetricCard label="Queued prompts" value={12} tone="amber" icon={<Cpu className="w-5 h-5" />} />
      </section>

      <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
        <Card className="lg:col-span-2">
          <CardHeader>
            <CardTitle>Agent registry</CardTitle>
            <Badge tone="neutral">0 active · 5 templates</Badge>
          </CardHeader>
          <CardBody>
            <EmptyState
              title="No custom agents yet"
              description="Create a reusable AI agent by selecting a model, system prompt, tools and a cost policy. Templates below are ready to enable."
              icon={Bot}
              actionLabel="New AI agent"
            />
            <div className="mt-6 divide-y divide-slate-100 border border-slate-100 rounded-lg overflow-hidden">
              {[
                { name: "Traceability Analyst", desc: "Recommends missing links across the artifact graph.", model: "routing default", status: "queued" },
                { name: "Test Generator", desc: "Generates unit tests for a selected Task artifact.", model: "code-model", status: "running" },
                { name: "Incident Responder", desc: "Traces an incident backwards to its offending commit/PR.", model: "reasoning-model", status: "queued" },
                { name: "Requirement Cleric", desc: "Refines ambiguous requirements and proposes acceptance criteria.", model: "reasoning-model", status: "completed" },
                { name: "Impact Predictor", desc: "Estimates blast radius for a proposed requirement change.", model: "routing default", status: "queued" },
              ].map((a) => (
                <div key={a.name} className="flex items-center gap-3 px-4 py-3 hover:bg-slate-50">
                  <div className="w-9 h-9 rounded-lg bg-violet-50 border border-violet-100 grid place-items-center text-violet-600 shrink-0">
                    <Bot className="w-4 h-4" />
                  </div>
                  <div className="min-w-0 flex-1">
                    <div className="text-sm font-medium text-slate-800">{a.name}</div>
                    <div className="text-xs text-slate-500">{a.desc}</div>
                  </div>
                  <Badge tone="neutral" className="hidden sm:inline-flex asf-monospace">{a.model}</Badge>
                  <JobStatusBadge status={a.status} />
                </div>
              ))}
            </div>
          </CardBody>
        </Card>

        <Card>
          <CardHeader>
            <CardTitle>AI Gateway</CardTitle>
            <Badge tone="violet">Interfaces</Badge>
          </CardHeader>
          <CardBody className="space-y-3 text-sm">
            <div className="p-3 rounded-lg border border-violet-100 bg-violet-50/60">
              <div className="font-semibold text-violet-900 flex items-center gap-1.5">
                <Zap className="w-4 h-4" /> Provider adapter pattern
              </div>
              <p className="text-xs text-violet-800/80 mt-1 leading-relaxed">
                Business logic depends on <code className="bg-white/70 px-1 rounded">asf-ai</code> interfaces only. Real providers plug in without touching domain code.
              </p>
            </div>
            <ul className="space-y-2 text-xs">
              {[
                "Model routing by task + tenant policy",
                "Usage metering (tokens, GPU-s, $)",
                "Priority queues + cost ceilings",
                "Audit log of every inference",
              ].map((t) => (
                <li key={t} className="flex items-start gap-2 text-slate-600">
                  <ShieldCheck className="w-3.5 h-3.5 text-emerald-600 mt-0.5 shrink-0" />
                  {t}
                </li>
              ))}
            </ul>
            <div className="pt-3 border-t border-slate-100 text-xs text-slate-500">
              Hint: use <span className="asf-chip font-mono">⌘ K</span> → Ask ASF to try the interactive query interface.
            </div>
          </CardBody>
        </Card>
      </div>
    </div>
  );
}