package routes

import (
	"encoding/json"
	"errors"
	"html/template"
	"os"
	"path"

	"github.com/gofiber/fiber/v2"
	"github.com/russross/blackfriday/v2"
)

type Content struct {
  ID      string        `json:"id"`
  Name    string        `json:"name"`
  Date    string        `json:"date"`
  Author  string        `json:"author"`
  Content template.HTML `json:"content"`
}

func GetContent(pth string, name string) (Content, error) {
  var res Content
  jsonfile := path.Join(pth, name+".json")
  mdfile := path.Join(pth, name+".md")

  jsoncontent, err := os.ReadFile(jsonfile)
  if err != nil {
    return res, errors.New("Cannot read JSON file: "+jsonfile)
  }

  mdcontent, err := os.ReadFile(mdfile)
  if err != nil {
    return res, errors.New("Cannot read markdown file: "+mdfile)
  }

  if(json.Unmarshal(jsoncontent, &res)!= nil) {
    return res, errors.New("Cannot parse JSON: "+jsonfile)
  }

  md := string(blackfriday.Run(mdcontent, blackfriday.WithExtensions(blackfriday.BackslashLineBreak)))
  res.Content = template.HTML(md) 
  return res, nil
}

func RenderError(c *fiber.Ctx, code int) error{
  var msg string = "Server Error"
  c.Status(code)

  switch code {
  case 404:
    msg = "Not Found"
  }

  return c.Render("error", fiber.Map{
    "msg": msg,
  })
}