import { Router } from 'express'
// import { Movie } from '../models/Post'
import { File } from '../lib/models/File'
import { Post } from '../lib/models/Post';
import jwt, { UserJwtRequest } from '../lib/middleware/jwt';
import * as crypto from "crypto";
import { User } from '../lib/models/User';
import secretKey from '../lib/middleware/secret-key';
import markdown from '../lib/render-markdown';

export const posts = Router()

posts.post('/create', jwt, async (req, res, next) => {
    try {
        if (!req.body.files) {
            throw new Error("Please provide files.")
        }

        if (!req.body.title) {
            throw new Error("Please provide a title.")
        }

        if (!req.body.userId) {
            throw new Error("No user id provided.")
        }

        if (!req.body.visibility) {
            throw new Error("Please provide a visibility.")
        }

        if (req.body.visibility === 'protected' && !req.body.password) {
            throw new Error("Please provide a password.")
        }

        let hashedPassword: string = ''
        if (req.body.visibility === 'protected') {
            hashedPassword = crypto.createHash('sha256').update(req.body.password).digest('hex');
        }

        const newPost = new Post({
            title: req.body.title,
            visibility: req.body.visibility,
            password: hashedPassword,
        })

        await newPost.save()
        await newPost.$add('users', req.body.userId);
        const newFiles = await Promise.all(req.body.files.map(async (file) => {
            const renderAsMarkdown = ['markdown', 'md', 'mdown', 'mkdn', 'mkd', 'mdwn', 'mdtxt', 'mdtext', 'text', '']
            const fileType = () => {
                const pathParts = file.title.split(".")
                const language = pathParts.length > 1 ? pathParts[pathParts.length - 1] : ""
                return language
            }
            const type = fileType()
            let contentToRender: string = (file.content || '');

            if (!renderAsMarkdown.includes(type)) {
                contentToRender =
                    `~~~${type}
${file.content}
~~~`
            } else {
                contentToRender = '\n' + file.content;
            }
            const html = markdown(contentToRender)
            const newFile = new File({
                title: file.title,
                content: file.content,
                sha: crypto.createHash('sha256').update(file.content).digest('hex').toString(),
                html
            })

            await newFile.$set("user", req.body.userId);
            await newFile.$set("post", newPost.id);
            await newFile.save();
            return newFile;
        }))

        await Promise.all(newFiles.map((file) => {
            newPost.$add("files", file.id);
            newPost.save();
        }))

        res.json(newPost);
    } catch (e) {
        next(e);
    }
});

posts.get("/", secretKey, async (req, res, next) => {
    try {
        const posts = await Post.findAll({
            attributes: ["id", "title", "visibility", "createdAt"],
        })
        res.json(posts);
    } catch (e) {
        next(e);
    }
});

posts.get("/mine", jwt, secretKey, async (req: UserJwtRequest, res, next) => {
    if (!req.user) {
        return res.status(401).json({ error: "Unauthorized" })
    }

    try {
        const user = await User.findByPk(req.user.id, {
            include: [
                {
                    model: Post,
                    as: "posts",
                    include: [
                        {
                            model: File,
                            as: "files"
                        }
                    ]
                },
            ],
        })
        if (!user) {
            return res.status(404).json({ error: "User not found" })
        }
        return res.json(user.posts?.sort((a, b) => b.createdAt.getTime() - a.createdAt.getTime()))
    } catch (error) {
        next(error)
    }
})

posts.get("/:id", async (req, res, next) => {
    try {
        const post = await Post.findOne({
            where: {
                id: req.params.id
            },
            include: [
                {
                    model: File,
                    as: "files",
                    attributes: ["id", "title", "content", "sha", "createdAt", "updatedAt", "html"],
                },
                {
                    model: User,
                    as: "users",
                    attributes: ["id", "username"],
                },
            ]
        })

        if (!post) {
            throw new Error("Post not found.")
        }


        if (post.visibility === 'public' || post?.visibility === 'unlisted') {
            secretKey(req, res, () => {
                res.json(post);
            })
        } else if (post.visibility === 'private') {
            jwt(req as UserJwtRequest, res, () => {
                res.json(post);
            })
        } else if (post.visibility === 'protected') {
            const { password } = req.query
            if (!password || typeof password !== 'string') {
                return jwt(req as UserJwtRequest, res, () => {
                    res.json(post);
                })
            }
            const hash = crypto.createHash('sha256').update(password).digest('hex').toString()
            if (hash !== post.password) {
                return res.status(400).json({ error: "Incorrect password." })
            }

            res.json(post);
        }
    }
    catch (e) {
        next(e);
    }
});