import * as React from "react";

const { useEffect, useRef, useState } = React;

interface ChatInputProps {
	loading: boolean;
	queuedMessages: { id: string; text: string }[];
	onSubmit: (message: string) => void;
	onCancel: () => void;
	onRemoveQueuedMessage: (id: string) => void;
}

export function ChatInput({
	loading,
	queuedMessages,
	onSubmit,
	onCancel,
	onRemoveQueuedMessage,
}: ChatInputProps) {
	const [input, setInput] = useState("");
	const inputRef = useRef<HTMLTextAreaElement>(null);

	useEffect(() => {
		inputRef.current?.focus();
	}, []);

	const handleSubmit = () => {
		if (!input.trim()) return;
		onSubmit(input);
		setInput("");
	};

	return (
		<div
			style={{
				padding: "24px",
				background: "#171717",
				display: "flex",
				justifyContent: "center",
			}}
		>
			<div
				style={{
					maxWidth: "768px",
					width: "100%",
					display: "flex",
					flexDirection: "column",
					gap: "8px",
				}}
			>
				{/* Queued message indicators */}
				{queuedMessages.map(({ id, text }) => (
					<div
						key={id}
						data-testid="queued-message-indicator"
						style={{
							display: "flex",
							alignItems: "center",
							gap: "8px",
							padding: "8px 12px",
							background: "#1e1e1e",
							border: "1px solid #3a3a3a",
							borderRadius: "12px",
							fontSize: "0.875rem",
						}}
					>
						<span
							style={{
								color: "#666",
								flexShrink: 0,
								fontSize: "0.7rem",
								fontWeight: 700,
								letterSpacing: "0.05em",
								textTransform: "uppercase",
							}}
						>
							Queued
						</span>
						<span
							style={{
								color: "#888",
								flex: 1,
								overflow: "hidden",
								textOverflow: "ellipsis",
								whiteSpace: "nowrap",
							}}
						>
							{text}
						</span>
						<button
							type="button"
							title="Edit queued message"
							onClick={() => {
								setInput(text);
								onRemoveQueuedMessage(id);
								inputRef.current?.focus();
							}}
							style={{
								background: "none",
								border: "none",
								color: "#666",
								cursor: "pointer",
								padding: "2px 6px",
								fontSize: "0.8rem",
								flexShrink: 0,
								borderRadius: "4px",
							}}
						>
							Edit
						</button>
						<button
							type="button"
							title="Cancel queued message"
							onClick={() => onRemoveQueuedMessage(id)}
							style={{
								background: "none",
								border: "none",
								color: "#666",
								cursor: "pointer",
								padding: "2px 4px",
								fontSize: "0.875rem",
								flexShrink: 0,
								borderRadius: "4px",
							}}
						>
							✕
						</button>
					</div>
				))}
				{/* Input row */}
				<div
					style={{
						display: "flex",
						gap: "8px",
						alignItems: "center",
					}}
				>
					<textarea
						ref={inputRef}
						value={input}
						onChange={(e) => setInput(e.target.value)}
						onKeyDown={(e) => {
							if (e.key === "Enter" && !e.shiftKey) {
								e.preventDefault();
								handleSubmit();
							}
						}}
						placeholder="Send a message..."
						rows={1}
						style={{
							flex: 1,
							padding: "14px 20px",
							borderRadius: "24px",
							border: "1px solid #333",
							outline: "none",
							fontSize: "1rem",
							fontWeight: "500",
							background: "#2f2f2f",
							color: "#ececec",
							boxShadow: "0 2px 6px rgba(0,0,0,0.02)",
							resize: "none",
							overflowY: "auto",
							fontFamily: "inherit",
						}}
					/>
					<button
						type="button"
						onClick={loading && !input.trim() ? onCancel : handleSubmit}
						disabled={!loading && !input.trim()}
						style={{
							background: "#ececec",
							color: "black",
							border: "none",
							borderRadius: "50%",
							width: "32px",
							height: "32px",
							display: "flex",
							alignItems: "center",
							justifyContent: "center",
							cursor: "pointer",
							opacity: !loading && !input.trim() ? 0.5 : 1,
							flexShrink: 0,
						}}
					>
						{loading && !input.trim() ? "■" : "↑"}
					</button>
				</div>
			</div>
		</div>
	);
}