import { raise } from "@reacord/helpers/raise.js"
import type { HostConfig } from "react-reconciler"
import ReactReconciler from "react-reconciler"
import { DefaultEventPriority } from "react-reconciler/constants.js"
import { Node } from "./node.js"
import type { Renderer } from "./renderers/renderer"
import { TextNode } from "./text-node.js"

const config: HostConfig<
	string, // Type,
	Record<string, unknown>, // Props,
	Renderer, // Container,
	Node<unknown>, // Instance,
	TextNode, // TextInstance,
	never, // SuspenseInstance,
	never, // HydratableInstance,
	never, // PublicInstance,
	never, // HostContext,
	true, // UpdatePayload,
	never, // ChildSet,
	number, // TimeoutHandle,
	number // NoTimeout,
> = {
	supportsMutation: true,
	supportsPersistence: false,
	supportsHydration: false,
	isPrimaryRenderer: true,
	scheduleTimeout: global.setTimeout,
	cancelTimeout: global.clearTimeout,
	noTimeout: -1,

	getRootHostContext: () => null,
	getChildHostContext: (parentContext) => parentContext,

	createInstance: (type, props) => {
		if (type !== "reacord-element") {
			raise(`Unknown element type: ${type}`)
		}

		if (typeof props.createNode !== "function") {
			raise(`Missing createNode function`)
		}

		const node: unknown = props.createNode(props.props)
		if (!(node instanceof Node)) {
			raise(`createNode function did not return a Node`)
		}

		return node
	},
	createTextInstance: (text) => new TextNode(text),
	shouldSetTextContent: () => false,
	detachDeletedInstance: (_instance) => {},
	beforeActiveInstanceBlur: () => {},
	afterActiveInstanceBlur: () => {},
	getInstanceFromNode: (_node: unknown) => null,
	getInstanceFromScope: (_scopeInstance: unknown) => null,

	clearContainer: (renderer) => {
		renderer.nodes.clear()
	},
	appendChildToContainer: (renderer, child) => {
		renderer.nodes.add(child)
	},
	removeChildFromContainer: (renderer, child) => {
		renderer.nodes.remove(child)
	},
	insertInContainerBefore: (renderer, child, before) => {
		renderer.nodes.addBefore(child, before)
	},

	appendInitialChild: (parent, child) => {
		parent.children.add(child)
	},
	appendChild: (parent, child) => {
		parent.children.add(child)
	},
	removeChild: (parent, child) => {
		parent.children.remove(child)
	},
	insertBefore: (parent, child, before) => {
		parent.children.addBefore(child, before)
	},

	prepareUpdate: () => true,
	commitUpdate: (node, payload, type, oldProps, newProps) => {
		node.props = newProps.props
	},
	commitTextUpdate: (node, oldText, newText) => {
		node.props = newText
	},

	prepareForCommit: () => null,
	resetAfterCommit: (renderer) => {
		renderer.render()
	},
	prepareScopeUpdate: (_scopeInstance: unknown, _instance: unknown) => {},

	preparePortalMount: () => raise("Portals are not supported"),
	getPublicInstance: () => raise("Refs are currently not supported"),

	finalizeInitialChildren: () => false,

	getCurrentEventPriority: () => DefaultEventPriority,
}

export const reconciler = ReactReconciler(config)