package http

import (
	"log"
	"math"
	"net/http"
	"strconv"
	"strings"
	"time"

	"git.arav.su/Arav/dwelling-home/pkg/mindflow"
	"git.arav.su/Arav/dwelling-home/pkg/servicestat"
	"git.arav.su/Arav/dwelling-home/pkg/util"
	"git.arav.su/Arav/dwelling-home/web"
	"git.arav.su/Arav/justcaptcha/v2/dwcaptcha"
	"git.arav.su/Arav/justcaptcha/v2/inmemdb"
	"git.arav.su/Arav/justguestbook"
)

type Handlers struct {
	guestbookDB       justguestbook.Guestbook
	mindflowDB        mindflow.Mindflow
	captchaExpire     time.Duration
	guestbookOwner    string
	guestbookPageSize int64
}

func NewHandlers(captchaExpire time.Duration, gbOwner string, gbPageSize int64,
	gdb justguestbook.Guestbook, mdb mindflow.Mindflow) *Handlers {
	return &Handlers{
		guestbookDB:       gdb,
		mindflowDB:        mdb,
		captchaExpire:     captchaExpire,
		guestbookOwner:    gbOwner,
		guestbookPageSize: gbPageSize}
}

func (h *Handlers) Index(w http.ResponseWriter, r *http.Request) {
	web.Index("", w)
}

func (h *Handlers) Privacy(w http.ResponseWriter, r *http.Request) {

	web.Privacy("/ Privacy statements",
		util.GetServiceByHost(r.Host, "radio"),
		util.GetServiceByHost(r.Host, "files"),
		util.GetServiceByHost(r.Host, "upload"), w)
}

func (h *Handlers) Stuff(w http.ResponseWriter, r *http.Request) {
	web.Stuff("/ Stuff", util.GetServiceByHost(r.Host, util.ServiceGit),
		util.GetServiceByHost(r.Host, util.ServiceFiles), web.GetArticleMetadata(), w)
}

func (h *Handlers) Mindflow(w http.ResponseWriter, r *http.Request) {
	posts, err := h.mindflowDB.Posts()
	if err != nil {
		return
	}

	categories, err := h.mindflowDB.Categories()
	if err != nil {
		log.Println(err)
		return
	}

	web.Mindflow("/ Mindflow", posts, categories, r, w)
}

func (h *Handlers) MindflowAdmin(w http.ResponseWriter, r *http.Request) {
	posts, err := h.mindflowDB.Posts()
	if err != nil {
		Error(w, http.StatusInternalServerError, err.Error(), "failed to load posts", r.Referer())
		return
	}

	categories, err := h.mindflowDB.Categories()
	if err != nil {
		Error(w, http.StatusInternalServerError, err.Error(), "failed to load categories", r.Referer())
		return
	}

	web.MindflowAdmin("/ Mindflow Administration", posts, categories, r, w)
}

func (h *Handlers) About(w http.ResponseWriter, r *http.Request) {
	var lst servicestat.ServiceList = make(servicestat.ServiceList)
	reimu, err := servicestat.GatherStatus("http://reimu.arav.home.arpa:14882/processes")
	if err == nil {
		for k, v := range reimu {
			lst[k] = v
		}
	}
	sakuya, err := servicestat.GatherStatus("http://sakuya.arav.home.arpa:14882/processes")
	if err == nil {
		for k, v := range sakuya {
			lst[k] = v
		}
	}

	web.About("/ About", util.GetServiceByHost(r.Host, util.ServiceFiles), lst, w)
}

func (h *Handlers) Article(w http.ResponseWriter, r *http.Request) {
	name := r.URL.Path[strings.LastIndex(r.URL.Path, "/")+1:]
	artcl := web.GetArticle(name)
	if artcl == nil {
		http.Error(w, "an article doesn't exist", http.StatusNotFound)
		return
	}

	web.Article(artcl.Title, artcl.Description, string(artcl.Body), artcl.Date, r.Host, name, r, w)
}

func (h *Handlers) Guestbook(w http.ResponseWriter, r *http.Request) {
	var page int64
	var pageSize int64

	pageStr := r.URL.Query().Get("p")
	if pageStr != "" {
		page, _ = strconv.ParseInt(pageStr, 10, 64)
	} else {
		page = 1
	}

	pageSzStr := r.URL.Query().Get("ps")
	if pageSzStr != "" {
		pageSize, _ = strconv.ParseInt(pageSzStr, 10, 64)
	} else {
		pageSize = h.guestbookPageSize
	}

	entries, err := h.guestbookDB.Entries(page, pageSize)
	if err != nil {
		log.Println("failed to load gb entries:", err)
		return
	}

	for _, entry := range entries {
		entry.Message = strings.ReplaceAll(entry.Message, "\\n", "\n")
	}

	entriesCount, _ := h.guestbookDB.Count()
	pageCount := int64(math.Ceil(float64(entriesCount) / float64(h.guestbookPageSize)))

	dwc := dwcaptcha.NewDwellingCaptcha(h.captchaExpire)
	_, id := inmemdb.New(r.RemoteAddr, dwc)

	web.Guestbook("/ Guestbook", h.guestbookOwner, string(id), pageCount, entries, r, w)
}

func (h *Handlers) GuestbookAdmin(w http.ResponseWriter, r *http.Request) {
	entriesCount, _ := h.guestbookDB.Count()
	entries, err := h.guestbookDB.Entries(1, entriesCount)
	if err != nil {
		Error(w, http.StatusInternalServerError, err.Error(), "cannot load gb", r.Referer())
		return
	}
	for _, entry := range entries {
		entry.Message = strings.ReplaceAll(entry.Message, "\\n", "\n")
	}

	web.GuestbookAdmin("/ Guestbook Administration", h.guestbookOwner, entries, r, w)
}

func (h *Handlers) RSS(w http.ResponseWriter, r *http.Request) {
	posts, err := h.mindflowDB.Posts()
	if err != nil {
		return
	}
	var scheme string
	if r.Header.Get("Scheme") != "" {
		scheme = r.Header.Get("Scheme")
	} else {
		scheme = "http"
	}

	web.RSS(scheme+"://"+r.Host, "Arav", posts, r, w)
}

func FaviconIco(w http.ResponseWriter, r *http.Request) {
	data, _ := web.AssetsGetFile("img/favicon.ico")
	w.Write(data)
}

func RobotsTxt(w http.ResponseWriter, r *http.Request) {
	data, _ := web.AssetsGetFile("robots.txt")
	w.Write(data)
}

func SitemapXml(w http.ResponseWriter, r *http.Request) {
	data, _ := web.AssetsGetFile("sitemap.xml")
	w.Write(data)
}

func Error(w http.ResponseWriter, code int, reason, message, referer string) {
	w.WriteHeader(code)
	web.ErrorXXX("/ "+http.StatusText(code), reason, message, referer, code, w)
}

func cleanupNewlines(text string) (out string) {
	out = strings.ReplaceAll(text, "\r\n", "\n")
	out = strings.ReplaceAll(out, "\n\r", "\n")
	return strings.ReplaceAll(out, "\r", "\n")
}