"use client";

import {
  AtSign,
  CheckSquare,
  Mic,
  Paperclip,
  Play,
  Shield,
} from "lucide-react";
import { motion, useReducedMotion } from "motion/react";
import { Button } from "@/components/ui/button";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { Textarea } from "@/components/ui/textarea";
import { agentEase, agentPanelTransition } from "./agent-motion";
import { cn } from "@/lib/utils";
import { type } from "@/lib/typography";

interface ChatComposerProps {
  value: string;
  onChange: (value: string) => void;
  onSubmit: () => void;
  disabled?: boolean;
  isSending?: boolean;
  className?: string;
}

export function ChatComposer({
  value,
  onChange,
  onSubmit,
  disabled = false,
  isSending = false,
  className,
}: ChatComposerProps) {
  const canSubmit = value.trim().length > 0 && !disabled && !isSending;
  const reduceMotion = useReducedMotion();

  function handleKeyDown(event: React.KeyboardEvent<HTMLTextAreaElement>) {
    if (event.key === "Enter" && !event.shiftKey) {
      event.preventDefault();
      if (canSubmit) onSubmit();
    }
  }

  return (
    <motion.div
      className={cn("shrink-0 p-3 sm:p-4", className)}
      initial={{ opacity: 0, y: 12 }}
      animate={{ opacity: 1, y: 0 }}
      transition={agentPanelTransition}
    >
      <motion.div
        className="rounded-2xl border bg-card p-3 shadow-md sm:p-4"
        layout
        transition={agentPanelTransition}
        whileHover={
          reduceMotion ? undefined : { boxShadow: "0 8px 30px -8px rgba(1, 121, 111, 0.12)" }
        }
      >
        <Textarea
          value={value}
          onChange={(event) => onChange(event.target.value)}
          onKeyDown={handleKeyDown}
          placeholder="امتحان کنید: «یک سناریو پاسخ‌گویی خودکار برای مشتریان طراحی کن»..."
          disabled={disabled || isSending}
          rows={2}
          className={cn(
            "min-h-[4.5rem] resize-none border-0 bg-transparent px-1 py-1 text-start shadow-none transition-[min-height] duration-300 ease-out focus-visible:ring-0",
            type["body-sm"]
          )}
          aria-label="دستور عامل"
        />

        <div className="mt-2 flex items-center justify-between gap-2 border-t pt-2">
          <div className="flex items-center gap-0.5 sm:gap-1">
            <Button
              type="button"
              variant="ghost"
              size="icon-sm"
              className="text-muted-foreground"
              aria-label="پیوست"
            >
              <Paperclip className="size-4" aria-hidden />
            </Button>
            <Button
              type="button"
              variant="ghost"
              size="icon-sm"
              className="text-muted-foreground"
              aria-label="اشاره"
            >
              <AtSign className="size-4" aria-hidden />
            </Button>
            <Button
              type="button"
              variant="ghost"
              size="icon-sm"
              className="text-muted-foreground"
              aria-label="وظایف"
            >
              <CheckSquare className="size-4" aria-hidden />
            </Button>
            <Select defaultValue="overall">
              <SelectTrigger
                size="sm"
                className="h-8 gap-1 border-0 bg-transparent px-2 shadow-none"
              >
                <Shield className="size-3.5 text-muted-foreground" aria-hidden />
                <SelectValue />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="overall">کلی</SelectItem>
                <SelectItem value="focused">متمرکز</SelectItem>
                <SelectItem value="creative">خلاقانه</SelectItem>
              </SelectContent>
            </Select>
          </div>

          <div className="flex items-center gap-1.5">
            <Button
              type="button"
              variant="ghost"
              size="icon-sm"
              className="text-muted-foreground"
              aria-label="ضبط صدا"
            >
              <Mic className="size-4" aria-hidden />
            </Button>
            <motion.div
              whileHover={reduceMotion ? undefined : { scale: 1.04 }}
              whileTap={reduceMotion ? undefined : { scale: 0.96 }}
              transition={{ duration: 0.18, ease: agentEase }}
            >
              <Button
                type="button"
                onClick={onSubmit}
                disabled={!canSubmit}
                className="h-8 gap-1.5 rounded-full px-4"
              >
                <Play className="size-3.5 fill-current" aria-hidden />
                <span className={type.caption}>اجرا</span>
              </Button>
            </motion.div>
          </div>
        </div>
      </motion.div>
    </motion.div>
  );
}