import { Loading, Page, Text } from "@geist-ui/core";
import { useRouter } from "next/router";
import { useCallback, useEffect, useState } from "react";
import Document from '../../components/document'
import Header from "../../components/header";
import UnauthenticatedHeader from "../../components/unauthenticated-header";
import VisibilityBadge from "../../components/visibility-badge";
import { ThemeProps } from "../_app";

const Post = ({ theme, changeTheme }: ThemeProps) => {
    const [post, setPost] = useState<any>()
    const [isLoading, setIsLoading] = useState(true)
    const [error, setError] = useState<string>()
    const router = useRouter();

    useEffect(() => {
        async function fetchPost() {
            setIsLoading(true);
            if (router.query.id) {
                const post = await fetch(`/api/posts/${router.query.id}`, {
                    method: "GET",
                    headers: {
                        "Content-Type": "application/json",
                        "Authorization": `Bearer ${localStorage.getItem("drift-token")}`
                    }
                })

                if (post.ok) {
                    const res = await post.json()
                    if (res)
                        setPost(res)
                    else
                        setError("Post not found")
                } else {
                    if (post.status.toString().startsWith("4")) {
                        router.push("/signin")
                    } else {
                        setError(post.statusText)
                    }
                }
                setIsLoading(false)
            }
        }
        fetchPost()
    }, [router, router.query.id])

    const token = useCallback(() => {
        if (typeof window !== "undefined") {
            return localStorage.getItem("drift-token")
        } else {
            return ""
        }
    }, [])
    return (
        <Page>
            <Page.Header>
                {token() && <Header theme={theme} changeTheme={changeTheme} />}
                {!token() && <UnauthenticatedHeader theme={theme} changeTheme={changeTheme} />}
            </Page.Header>
            <Page.Content width={"var(--main-content-width)"} margin="auto">
                {error && <Text type="error">{error}</Text>}
                {!error && (isLoading || !post?.files) && <Loading />}
                {!isLoading && post && <><Text h2>{post.title} <VisibilityBadge visibility={post.visibility} /></Text>
                    {post.files.map(({ id, content, title }: { id: any, content: string, title: string }) => (
                        <Document
                            key={id}
                            content={content}
                            title={title}
                            editable={false}
                            initialTab={'preview'}
                        />
                    ))}
                </>
                }
            </Page.Content>

        </Page >
    )
}

export default Post