package blog

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"github.com/go-chi/chi"
	"github.com/go-chi/jwtauth"
	"github.com/go-chi/render"
	"net/http"
	"time"
)

type Comment struct {
	ID            int       `json:"id",db:"id"`
	Parent        string    `json:"post_id",db:"parent"`
	Author        string    `json:"author",db:"author"`
	Content       string    `json:"content",db:"content"`
	TimePublished time.Time `json:"time_published", db:"time_published"`
	Modified      bool      `json:"modified", db:"modified"`
	TimeModified  time.Time `json:"last_modified", db:"last_modified"`
}

type Comments []Comment

func getCommentById(w http.ResponseWriter, r *http.Request) {
	returnMessage := ReturnMessage{}
	returnMessage.Error = false
	id := chi.URLParam(r, "id")
	result := DB.QueryRow("SELECT id, parent, author, content, time_published, modified, last_modified FROM comments WHERE id=$1", id)
	comment := Comment{}
	err := result.Scan(&comment.ID, &comment.Parent, &comment.Author, &comment.Content, &comment.TimePublished, &comment.Modified, &comment.TimeModified)
	if err != nil {
		returnMessage.Message = "comment not found"
		returnMessage.Error = true
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnMessage)
		return
	}
	w.WriteHeader(http.StatusOK)
	render.JSON(w, r, comment)
	return
}

func postComment(w http.ResponseWriter, r *http.Request) {
	returnMessage := ReturnMessage{}
	returnMessage.Error = false
	newComment := &Comment{}
	// basic checks
	_, claims, _ := jwtauth.FromContext(r.Context())

	username := claims["username"].(string)
	post_id := chi.URLParam(r, "id")
	err := json.NewDecoder(r.Body).Decode(newComment)
	if err != nil {
		returnMessage.Message = "unknown error, try again later"
		returnMessage.Error = true
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnMessage)
		return
	}
	if newComment.Parent == "" {
		returnMessage.Message = "title is required"
		returnMessage.Error = true
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnMessage)
		return
	}
	if newComment.Content == "" {
		returnMessage.Message = "content is required"
		returnMessage.Error = true
		w.WriteHeader(http.StatusBadRequest)
		render.JSON(w, r, returnMessage)
		return
	}
	c := `INSERT INTO comments (parent, author, content, time_published, modified, last_modified)
	        VALUES ($1, $2, $3, $4, $5, $6)
	        RETURNING id`
	comment_id := 0
	err = DB.QueryRow(c, post_id, username, newComment.Content, time.Now().UTC(), false, time.Now().UTC()).Scan(&comment_id)
	if err != nil {
		if err == sql.ErrNoRows {
			returnMessage.Message = "something is super broken..."
			returnMessage.Error = true
			w.WriteHeader(http.StatusInternalServerError)
			render.JSON(w, r, returnMessage)
			fmt.Println(err)
			return
		}
		returnMessage.Message = "something is super broken..."
		returnMessage.Error = true
		w.WriteHeader(http.StatusInternalServerError)
		render.JSON(w, r, returnMessage)
		fmt.Println(err)
		return
	}
	returnMessage.Message = "comment added"
	w.WriteHeader(http.StatusCreated)
	render.JSON(w, r, returnMessage)
	return
}

func getCommentsByParentId(w http.ResponseWriter, r *http.Request) {
	returnMessage := ReturnMessage{}
	returnMessage.Error = false
	post_id := chi.URLParam(r, "post_id")
	search := `
    SELECT id, author, content, time_published, modified, last_modified
    FROM comments
    WHERE parent = $1
    ORDER BY id DESC
    `
	rows, err := DB.Query(search, post_id)
	if err != nil {
		returnMessage.Message = "something is super broken..."
		returnMessage.Error = true
		w.WriteHeader(http.StatusInternalServerError)
		render.JSON(w, r, returnMessage)
		fmt.Println(err)
		return
	}
	defer rows.Close()
	comment := Comment{}
	comments := make(Comments, 0)
	for rows.Next() {
		if err := rows.Scan(&comment.ID, &comment.Author, &comment.Content, &comment.TimePublished, &comment.Modified, &comment.TimeModified); err != nil {
		}
		comments = append(comments, comment)
	}
	if err := rows.Err(); err != nil {
		returnMessage.Message = "something is super broken..."
		returnMessage.Error = true
		w.WriteHeader(http.StatusInternalServerError)
		render.JSON(w, r, returnMessage)
		fmt.Println(err)
		return
	}
	w.WriteHeader(http.StatusOK)
	render.JSON(w, r, comments)
	return
}