package http

import (
	"fmt"
	"image/jpeg"
	"net/http"
	"strconv"
	"strings"
	"time"

	"git.arav.su/Arav/dwelling-home/pkg/mindflow"
	"git.arav.su/Arav/justcaptcha/pkg/captcha"
	"git.arav.su/Arav/justcaptcha/pkg/captcha/inmemdb"
	"git.arav.su/Arav/justcaptcha/pkg/dwcaptcha"
	"git.arav.su/Arav/justguestbook/guestbook"
)

// Guestbook API ///////////////////////////////////////////////////////////////

type GuestbookApiHandlers struct {
	Owner    string
	PageSize int64
	db       guestbook.Guestbook
}

func NewGuestbookApiHandlers(owner string, pageSz int64, db guestbook.Guestbook) *GuestbookApiHandlers {
	return &GuestbookApiHandlers{Owner: owner, PageSize: pageSz, db: db}
}

func (h *GuestbookApiHandlers) New(w http.ResponseWriter, r *http.Request) {
	var entry *guestbook.Entry
	var err error

	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
		r.ParseForm()

		if !inmemdb.Solve(captcha.ID(r.FormValue("captcha_id")), captcha.Answer(r.FormValue("captcha_answer"))) {
			ForbiddenError("Wrong answer given.", "Here's your message:"+r.FormValue("message"), w)
			return
		}

		if r.FormValue("name") == "" {
			r.Form.Set("name", "Anonymous")
		}

		message := strings.ReplaceAll(r.FormValue("message"), "\r\n", "\n")
		message = strings.ReplaceAll(message, "\n\r", "\n")
		message = strings.ReplaceAll(message, "\r", "\n")

		entry, err = guestbook.NewEntry(r.FormValue("name"), message,
			r.FormValue("website"), r.FormValue("hide_website") != "")
		if err != nil {
			InternalError(err.Error(), "Here's your message:"+r.FormValue("message"), w)
			return
		}
	}

	if err = h.db.NewEntry(entry); err != nil {
		InternalError(err.Error(), "Here's your message:"+r.FormValue("message"), w)
		return
	}

	http.Redirect(w, r, "/guestbook", http.StatusMovedPermanently)
}

func (h *GuestbookApiHandlers) Edit(w http.ResponseWriter, r *http.Request) {
	var entry *guestbook.Entry
	var err error

	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
		r.ParseForm()

		if r.FormValue("name") == "" {
			r.Form.Set("name", "Anonymous")
		}

		message := strings.ReplaceAll(r.FormValue("message"), "\r\n", "\n")
		message = strings.ReplaceAll(message, "\n\r", "\n")
		message = strings.ReplaceAll(message, "\r", "\n")

		entry, err = guestbook.NewEntry(r.FormValue("name"), message,
			r.FormValue("website"), r.FormValue("hide_website") != "")
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		entry.ID, _ = strconv.ParseInt(GetURLParam(r, "id"), 10, 64)
	}

	if err = h.db.EditEntry(entry); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

}

func (h *GuestbookApiHandlers) Delete(w http.ResponseWriter, r *http.Request) {
	id, _ := strconv.ParseInt(GetURLParam(r, "id"), 10, 64)
	if err := h.db.DeleteEntry(id); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
}

func (h *GuestbookApiHandlers) Reply(w http.ResponseWriter, r *http.Request) {
	var reply *guestbook.Reply
	var err error

	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
		r.ParseForm()

		id, _ := strconv.ParseInt(GetURLParam(r, "id"), 10, 64)

		message := strings.ReplaceAll(r.FormValue("message"), "\r\n", "\n")
		message = strings.ReplaceAll(message, "\n\r", "\n")
		message = strings.ReplaceAll(message, "\r", "\n")

		reply, err = guestbook.NewReply(id, message)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}

	if err := h.db.NewReply(reply); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
}

func (h *GuestbookApiHandlers) EditReply(w http.ResponseWriter, r *http.Request) {
	var reply *guestbook.Reply
	var err error

	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
		r.ParseForm()

		id, _ := strconv.ParseInt(GetURLParam(r, "id"), 10, 64)

		message := strings.ReplaceAll(r.FormValue("message"), "\r\n", "\n")
		message = strings.ReplaceAll(message, "\n\r", "\n")
		message = strings.ReplaceAll(message, "\r", "\n")

		reply, err = guestbook.NewReply(id, message)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}

	if err := h.db.EditReply(reply); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
	}
}

func (h *GuestbookApiHandlers) DeleteReply(w http.ResponseWriter, r *http.Request) {
	id, _ := strconv.ParseInt(GetURLParam(r, "id"), 10, 64)
	if err := h.db.DeleteReply(id); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
	}
}

// CAPTCHA API /////////////////////////////////////////////////////////////////

type CaptchaApiHandlers struct {
	Expiry time.Duration
}

func NewCaptchaApiHandlers(expiry time.Duration) *CaptchaApiHandlers {
	inmemdb.SetExpiry(expiry)
	return &CaptchaApiHandlers{Expiry: expiry}
}

func (h *CaptchaApiHandlers) New(w http.ResponseWriter, r *http.Request) {
	dwc := dwcaptcha.NewDwellingCaptcha(h.Expiry)
	_, id := inmemdb.New(r.RemoteAddr, dwc)
	w.WriteHeader(http.StatusCreated)
	fmt.Fprint(w, id)
}

func (h *CaptchaApiHandlers) Solve(w http.ResponseWriter, r *http.Request) {
	captchaID := captcha.ID(GetURLParam(r, "id"))

	if r.URL.Query().Has("remove") {
		inmemdb.Remove(captchaID)
		w.WriteHeader(http.StatusNoContent)
		return
	}

	if solved := inmemdb.IsSolved(captchaID); !solved {
		http.Error(w, "wrong answer", http.StatusForbidden)
		return
	}

	w.WriteHeader(http.StatusNoContent)
}

func (h *CaptchaApiHandlers) Image(w http.ResponseWriter, r *http.Request) {
	id := captcha.ID(GetURLParam(r, "id"))

	image := inmemdb.Image(id, r.URL.Query().Get("style"))
	if image == nil {
		http.Error(w, "image not found", http.StatusNotFound)
		return
	}

	w.Header().Add("Content-Disposition", "inline; filename=\""+string(id)+"\"")

	jpeg.Encode(w, *image, &jpeg.Options{Quality: 20})
}

// Mindflow API ////////////////////////////////////////////////////////////////

type MindflowApiHandlers struct {
	db mindflow.Mindflow
}

func NewMindflowApiHandlers(db mindflow.Mindflow) *MindflowApiHandlers {
	return &MindflowApiHandlers{db: db}
}

func (h *MindflowApiHandlers) New(w http.ResponseWriter, r *http.Request) {
	var post *mindflow.Post
	var err error

	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
		r.ParseForm()

		category_id, _ := strconv.ParseInt(r.FormValue("category"), 10, 64)

		if category_id == 0 {
			category_id, err = h.db.NewCategory(r.FormValue("new-category"))
			if err != nil {
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}
		}

		post, err = mindflow.NewPost(mindflow.Category{ID: category_id}, r.FormValue("title"), r.FormValue("body"))
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}

	if err = h.db.New(post); err != nil {
		InternalError(err.Error(), "Title: "+r.FormValue("title")+" | Body: "+r.FormValue("body"), w)
		return
	}

	http.Redirect(w, r, "/mindflow/admin", http.StatusMovedPermanently)
}

func (h *MindflowApiHandlers) Edit(w http.ResponseWriter, r *http.Request) {
}

func (h *MindflowApiHandlers) Delete(w http.ResponseWriter, r *http.Request) {
}