import {
    useState,
    type ChangeEvent,
    type Dispatch,
    type SetStateAction,
} from "react";
import type { ErrorResponse } from "../types/error";
import type { CreateRobotResponse, Robot } from "../types/robot";

type Props = {
    apiUrl: string;
    errorMessage: string;
    robots: Robot[];
    token: string | null;
    setErrorMessage: Dispatch<SetStateAction<string>>;
    setIsAddingRobot: Dispatch<SetStateAction<boolean>>;
    setRobots: Dispatch<SetStateAction<Robot[]>>;
};

function AddRobotForm({
    apiUrl,
    errorMessage,
    robots,
    token,
    setErrorMessage,
    setIsAddingRobot,
    setRobots,
}: Props) {
    const [isSubmitting, setIsSubmitting] = useState<boolean>(false);
    const [newRobotName, setNewRobotName] = useState<string>("");

    // Cancel robot creation
    function handleCancel() {
        setIsAddingRobot(false);
        setNewRobotName("");
        setErrorMessage("");
    }

    function handleInputChange(event: ChangeEvent<HTMLInputElement>) {
        if (errorMessage) {
            setErrorMessage("");
        }

        setNewRobotName(event.target.value);
    }

    // Create new robot
    async function handleSubmit() {
        if (!newRobotName.trim()) {
            setErrorMessage("Please enter a name for the robot.");
            return;
        }

        setIsSubmitting(true);
        setErrorMessage("");

        try {
            const response = await fetch(`${apiUrl}/robots`, {
                method: "POST",
                headers: {
                    Authorization: `Bearer ${token}`,
                    "Content-Type": "application/json",
                },
                body: JSON.stringify({ name: newRobotName.trim() }),
            });

            if (!response.ok) {
                const errorData: ErrorResponse = await response.json();
                throw new Error(
                    errorData.message ||
                        `Error creating the new robot: ${response.status}`
                );
            }

            const data: CreateRobotResponse = await response.json();
            console.log(data.message, data.robot);

            const newRobotList = [...robots, data.robot];
            setRobots(newRobotList);

            // Reset form and close input field
            setNewRobotName("");
            setIsAddingRobot(false);
        } catch (error) {
            console.error("Error creating the new robot:", error);

            if (error instanceof Error) {
                setErrorMessage(error.message);
            } else {
                setErrorMessage("Error creating the new robot.");
            }
        } finally {
            setIsSubmitting(false);
        }
    }

    return (
        <div className="add-robot-form">
            <input
                type="text"
                placeholder="Robot name..."
                value={newRobotName}
                onChange={handleInputChange}
                disabled={isSubmitting}
                autoFocus
            />
            <div className="add-robot-actions">
                <button
                    className="btn btn-start"
                    onClick={handleSubmit}
                    disabled={isSubmitting}
                >
                    {isSubmitting ? "Creating..." : "Create"}
                </button>
                <button
                    className="btn btn-stop"
                    onClick={handleCancel}
                    disabled={isSubmitting}
                >
                    Cancel
                </button>
            </div>
        </div>
    );
}

export default AddRobotForm;

