package blog

import (
	"database/sql"
	"fmt"
	"github.com/go-chi/chi"
	"github.com/go-chi/jwtauth"
	_ "github.com/go-chi/render"
	"github.com/gosimple/slug"
	"net/http"
	"strings"
	"time"
)

var (
	DB        *sql.DB
	TokenAuth *jwtauth.JWTAuth
)

type BlogPost struct {
	Title         string    `json:"title",db:"title"`
	Slug          string    `json:"slug",db:"slug"`
	Author        string    `json:"author",db:"author"`
	Content       string    `json:"content",db:"content"`
	DatePublished time.Time `json:"date", db:"date"`
}

type Tag struct {
	Tag string `json:"tag",db:"tag"`
}

func Init() {
	createPostsTable := `
	CREATE TABLE IF NOT EXISTS posts
	(id SERIAL PRIMARY KEY,
    title text,
    slug text,
	author text REFERENCES users (username),
    content text
	date timestamp)`
	DB.Exec(createPostsTable)

	createTagsTable := `
	CREATE TABLE IF NOT EXISTS tags
	(id SERIAL PRIMARY KEY,
    tag string,
	article_id REFERENCES posts (id))`
	DB.Exec(createTagsTable)
}

func Routes() *chi.Mux {
	r := chi.NewRouter()
	r.Group(func(r chi.Router) {
		r.Use(jwtauth.Verifier(TokenAuth))
		r.Use(jwtauth.Authenticator)
		r.Post("/", createBlogPost)
		r.Patch("/{slug}", updateBlogPostBySlug)
		r.Patch("/id/{id}", updateBlogPostById)
	})
	r.Get("/", getBlogPosts)
	r.Get("/{slug}", getBlogPostBySlug)
	r.Get("/tag/{slug}", getBlogPostByTag)
	r.Get("/id/{id}", getBlogPostById)
	return r
}

func createBlogPost(w http.ResponseWriter, r *http.Request) {
	blogPost := &BlogPost{}
	tags := &Tag{}
	_, claims, _ := jwtauth.FromContext(r.Context())
	username := claims["username"].(string)
	err := json.NewDecoder(r.Body).Decode(blogPost)
	if err != nil {
		w.WriteHeader(http.StatusBadRequest)
		fmt.Println(err)
		return
	}
	err := json.NewDecoder(r.Body).Decode(tags)
	if err != nil {
		w.WriteHeader(http.StatusBadRequest)
		fmt.Println(err)
		return
	}
	if blogPost.Title == "" {
		returnError.Message = "title is required"
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnError)
		return
	}
	if blogPost.Content == "" {
		returnError.Message = "content is required"
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnError)
		return
	}
	slug := slug.Make(blogPost.Content)
	s := `INSERT INTO posts (title, slug, author, content, date)
            VALUES ($1, $2, $3, $4, $5)`
    db.Exec(s, blogPost.Title, slug, username, blogPost.Content, time.UTC())
	if tags.Tag != "" {
        t : = `INSERT INTO tags (tag, article_id)
                VALUES ($1, $2)`
		for i := range strings.Split(tags.Tag, ",") {
            db.Exec(t, i, article_id)
		}

	}
	w.WriteHeader(http.StatusCreated)
	return
}

func updateBlogPostBySlug(w http.ResponseWriter, r *http.Request) {
	return
}

func updateBlogPostById(w http.ResponseWriter, r *http.Request) {
	return
}

func getBlogPosts(w http.ResponseWriter, r *http.Request) {
	return
}

func getBlogPostById(w http.ResponseWriter, r *http.Request) {
	return
}

func getBlogPostBySlug(w http.ResponseWriter, r *http.Request) {
	return
}

func getBlogPostBySlug(w http.ResponseWriter, r *http.Request) {
	return
}

func getRssFeed(w http.ResponseWriter, r *http.Request) {
	return
}