"use client";

import { motion, useReducedMotion } from "motion/react";
import { AGENT_FEATURE_CARDS, AGENT_WELCOME } from "./playground-content";
import { AgentSphere } from "./agent-sphere";
import {
  agentCardVariant,
  agentEase,
  agentFadeUp,
  agentStaggerContainer,
} from "./agent-motion";
import { FeatureCardIcon } from "./agent-thread";
import { cn } from "@/lib/utils";
import { type } from "@/lib/typography";

interface ChatEmptyStateProps {
  onSelectStarter: (id: string, prompt: string) => void;
  disabled?: boolean;
  className?: string;
}

export function ChatEmptyState({
  onSelectStarter,
  disabled = false,
  className,
}: ChatEmptyStateProps) {
  const reduceMotion = useReducedMotion();

  return (
    <motion.div
      className={cn(
        "flex flex-1 flex-col items-center overflow-y-auto px-4 py-6 sm:px-6 sm:py-8",
        className
      )}
      variants={agentStaggerContainer}
      initial="hidden"
      animate="visible"
      exit="exit"
    >
      <AgentSphere />

      <motion.h2
        className={cn(type.h3, "mt-5 text-center")}
        variants={agentFadeUp}
      >
        {AGENT_WELCOME.greeting}
      </motion.h2>
      <motion.p
        className={cn(type["body-sm"], "mt-1.5 max-w-md text-center text-muted-foreground")}
        variants={agentFadeUp}
      >
        {AGENT_WELCOME.subtitle}
      </motion.p>

      <motion.div
        className="mt-8 grid w-full max-w-2xl gap-3 sm:grid-cols-2 lg:max-w-3xl"
        variants={agentStaggerContainer}
      >
        {AGENT_FEATURE_CARDS.map((card) => (
          <motion.button
            key={card.id}
            type="button"
            disabled={disabled}
            variants={agentCardVariant}
            onClick={() => onSelectStarter(card.id, card.prompt)}
            whileHover={
              reduceMotion
                ? undefined
                : { y: -3, scale: 1.015, transition: { duration: 0.22, ease: agentEase } }
            }
            whileTap={
              reduceMotion
                ? undefined
                : { scale: 0.97, transition: { duration: 0.14 } }
            }
            className={cn(
              "group rounded-2xl border bg-card p-4 text-start shadow-sm",
              "hover:border-primary/30 hover:shadow-md disabled:opacity-50",
              "focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
            )}
          >
            <motion.div
              className="flex size-8 items-center justify-center rounded-lg bg-muted text-foreground"
              whileHover={reduceMotion ? undefined : { scale: 1.08 }}
              transition={{ type: "spring", stiffness: 400, damping: 22 }}
            >
              <FeatureCardIcon icon={card.icon} />
            </motion.div>
            <h3 className={cn(type["card-title"], "mt-3")}>{card.title}</h3>
            <p className={cn(type["card-desc"], "mt-1")}>{card.description}</p>
          </motion.button>
        ))}
      </motion.div>
    </motion.div>
  );
}