import path from "path";
import { Page, PostMetadata } from "../metadata";
import * as util from "../util";

const baseURL = process.env.BASE_URL || "shadowfacts.net";

export default async function activitypub(posts: Page[]) {
	for (const post of posts) {
		const object = postObject(post);
		const dir = path.dirname(post.metadata.permalink);
		const base = path.basename(post.metadata.permalink);
		const dest = path.format({
			dir,
			name: base,
			ext: ".json"
		});
		util.write(dest, JSON.stringify(object));
	}

	util.write("ap/actor", JSON.stringify(actorObject()))

	util.write(".well-known/webfinger", JSON.stringify(webfingerObject()));
}

function postObject(post: Page): object {
	const postMeta = <PostMetadata>post.metadata;
	return {
		"@context": [
			"https://www.w3.org/ns/activitystreams"
		],
		"type": "Article",
		"id": `https://${baseURL}${path.format({
			dir: path.dirname(post.metadata.permalink),
			name: path.basename(post.metadata.permalink),
			ext: ".json"
		})}`,
		"published": (<Date>postMeta.date).toISOString(),
		"inReplyTo": null,
		"url": `https://${baseURL}${postMeta.permalink}`,
		"attributedTo": `https://${baseURL}/ap/actor`,
		"to": [
			"https://www.w3.org/ns/activitystreams#Public"
		],
		"cc": [],
		"name": postMeta.title,
		"content": post.text
	};
}

function actorObject() {
	return {
		"@context": [
			"https://www.w3.org/ns/activitystreams",
			"https://w3id.org/security/v1"
		],
		"type": "Person",
		"id": `https://${baseURL}/ap/actor`,
		"preferredUsername": "shadowfacts",
		"name": "shadowfacts' blog",
		"icon": {
			"type": "Image",
			"mediaType": "image/png",
			"url": `https://${baseURL}/shadowfacts.png`
		},
		"inbox": `https://${baseURL}/ap/inbox`,
		"publicKey": {
			"id": `https://${baseURL}/ap/actor#main-key`,
			"owner": `https://${baseURL}/ap/actor`,
			"publicKeyPem":
`
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxsePhOEq6EqqgGe+5vKa
ti8cnvLoP3eJDTHENxX4M9epMIeo48cI214wkAERoNufZLtYeGOHO6YJcVydVSYN
Ud4lQxgaPwAlh0DB0BUrXR1yfcSAhHS86XBSUq86O3fY5V+vEdZiN5PfUCG5rg5t
5V/TrcbVQngXqDmwVZ/OcJ+5vUo+B62Mul7EmiNkZHKzp1VZGVtZ6nZ/4TxsdeSN
XT8Vb0f/GJQOQLzW6dV0CBupts6x7o+9oRiYiAH+cXLFyQdTQ+1TrqMSMscdfX9I
Kos5Ih7oKdj6wQt0pDEOGx090c9JzQC25RzxRk7jc1Jt1UzDi/a1U/BbucxIvPr3
PQIDAQAB
-----END PUBLIC KEY-----
`
		}
	};
}

function webfingerObject() {
	return {
		"subject": `acct:shadowfacts@${baseURL}`,
		"links": [
			{
				"rel": "self",
				"type": "application/activity+json",
				"href": `https://${baseURL}/ap/actor`
			}
		]
	};
}