package handlers

import (
	"court/database"
	"court/models"
	"fmt"
	"html/template"
	"net/http"
)

var (
	DB      *database.DB
	BaseURL string
)

func SetupDB() error {
	var err error
	err, DB = database.ConnectDB()
	if err != nil {
		return err
	}
	return nil
}

func Redirect(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	err, url := DB.GetUrlByID(id)
	if err != nil {
		w.WriteHeader(http.StatusInternalServerError)
		w.Write([]byte("Internal server error"))
		return
	}
	if url == "" {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("Not Found"))
		return
	}
	http.Redirect(w, r, url, http.StatusSeeOther)
}

func Delete(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	_, status := DB.DeleteByID(id)
	if status == 500 {
		w.WriteHeader(http.StatusInternalServerError)
		w.Write([]byte("Internal server error"))
	} else if status == 404 {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("Not Found"))
	} else {
		fmt.Fprint(w, "")
	}

}

func Post(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()

	id := r.FormValue("id")
	url := r.FormValue("url")

	tmpl := template.Must(template.ParseFiles("templates/fragments/link.html"))
	if url == "" {
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte("Bad Request"))
		return
	}
	if id == "" {
		err, randid := DB.CreateRandUrl(url)
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			w.Write([]byte("Internal server error"))
			return
		}
		tmpl.Execute(w, &models.Link{BaseUrl: BaseURL, ID: randid})

	} else {
		err, getid := DB.CreateChosenUrl(id, url)
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			w.Write([]byte("Internal server error"))
			return
		}
		tmpl.Execute(w, &models.Link{BaseUrl: BaseURL, ID: getid})

	}
}