package com.checkoutreactnativecomponents.components.managers

import com.checkoutreactnativecomponents.utils.Constants
import com.checkoutreactnativecomponents.utils.ReadableMapUtils
import com.facebook.react.bridge.ReadableMap
import com.facebook.react.uimanager.SimpleViewManager
import com.facebook.react.uimanager.ThemedReactContext
import com.facebook.react.uimanager.ViewManagerDelegate
import com.facebook.react.uimanager.annotations.ReactProp

/**
 * Abstract base class for React Native view managers that handle checkout components.
 *
 * Provides common functionality for:
 * - Configuration prop handling
 * - View creation lifecycle
 * - Event type constants
 *
 * @param T The view type this manager handles
 */
public abstract class BaseCheckoutManager<T : android.view.View> : SimpleViewManager<T>() {

    /**
     * Returns the name of this view manager for React Native registration.
     */
    abstract override fun getName(): String

    /**
     * Creates a new instance of the view this manager handles.
     */
    abstract override fun createViewInstance(context: ThemedReactContext): T

    /**
     * Handles the config prop that is common to all checkout components.
     * Converts ReadableMap to HashMap and delegates to the view's setConfig method.
     */
    @ReactProp(name = "config")
    public open fun setConfig(view: T?, value: ReadableMap?) {
        val config = ReadableMapUtils.readableMapToHashMap(value)
        setConfigOnView(view, config)
    }

    /**
     * Abstract method to set the configuration on the specific view type.
     * Implementations should cast the view to their specific type and call setConfig.
     */
    protected abstract fun setConfigOnView(view: T?, config: HashMap<String, Any>)

    /**
     * Returns the exported custom direct event type constants.
     * Override this to add component-specific events.
     */
    override fun getExportedCustomDirectEventTypeConstants(): MutableMap<String, Any>? = getDefaultEventConstants()

    /**
     * Returns the default event constants that most checkout components need.
     * Components can override getExportedCustomDirectEventTypeConstants to add more events.
     */
    protected open fun getDefaultEventConstants(): MutableMap<String, Any> = mutableMapOf(
        Constants.ON_DIMENSIONS_CHANGED to mapOf("registrationName" to Constants.ON_DIMENSIONS_CHANGED)
    )
}