package guestbook

import (
	"log"
	"net/http"
	"strings"

	"git.hatecomputers.club/hatecomputers/hatecomputers.club/api/types"
	"git.hatecomputers.club/hatecomputers/hatecomputers.club/database"
	"git.hatecomputers.club/hatecomputers/hatecomputers.club/utils"
)

func SignGuestbookContinuation(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
	return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
		name := req.FormValue("name")
		message := req.FormValue("message")

		formErrors := types.BannerMessages{
			Messages: []string{},
		}

		entry := &database.GuestbookEntry{
			ID:      utils.RandomId(),
			Name:    name,
			Message: message,
		}
		formErrors.Messages = append(formErrors.Messages, validateGuestbookEntry(entry)...)

		if len(formErrors.Messages) == 0 {
			_, err := database.SaveGuestbookEntry(context.DBConn, entry)
			if err != nil {
				log.Println(err)
				formErrors.Messages = append(formErrors.Messages, "failed to save entry")
			}
		}

		if len(formErrors.Messages) > 0 {
			(*context.TemplateData)["Error"] = formErrors
			(*context.TemplateData)["EntryForm"] = entry
			resp.WriteHeader(http.StatusBadRequest)

			return failure(context, req, resp)
		}

		formSuccess := types.BannerMessages{
			Messages: []string{"entry added."},
		}
		(*context.TemplateData)["Success"] = formSuccess
		return success(context, req, resp)
	}
}

func ListGuestbookContinuation(context *types.RequestContext, req *http.Request, resp http.ResponseWriter) types.ContinuationChain {
	return func(success types.Continuation, failure types.Continuation) types.ContinuationChain {
		entries, err := database.GetGuestbookEntries(context.DBConn)
		if err != nil {
			log.Println(err)
			resp.WriteHeader(http.StatusInternalServerError)
			return failure(context, req, resp)
		}

		(*context.TemplateData)["GuestbookEntries"] = entries
		return success(context, req, resp)
	}
}

func validateGuestbookEntry(entry *database.GuestbookEntry) []string {
	errors := []string{}

	if entry.Name == "" {
		errors = append(errors, "name is required")
	}

	if entry.Message == "" {
		errors = append(errors, "message is required")
	}

	messageLength := len(entry.Message)
	if messageLength > 500 {
		errors = append(errors, "message cannot be longer than 500 characters")
	}

	newLines := strings.Count(entry.Message, "\n")
	if newLines > 10 {
		errors = append(errors, "message cannot contain more than 10 new lines")
	}

	return errors
}