package handlers

import (
	"apjournal/config"
	"apjournal/internal/database/repos"
	"apjournal/internal/models"
	"apjournal/pkg/cache"
	"html/template"
	"log/slog"
	"net/http"
	"os"
	"strconv"
	"time"
)

var defUS = models.UserScore{}

// Handlers structure
type Handlers struct {
	cfg  config.Config
	log  *slog.Logger
	repo repos.FullRepo
	mc   cache.Cache
}

// NewHandlers constructor
func NewHandlers(
	cfg config.Config, l *slog.Logger, repo repos.FullRepo,
) *Handlers {
	if l == nil {
		l = slog.New(slog.NewJSONHandler(os.Stdout, nil))
	}
	h := &Handlers{
		cfg:  cfg,
		log:  l,
		repo: repo,
		mc:   cache.MemCache,
	}
	return h
}

func (h *Handlers) Ping(w http.ResponseWriter, r *http.Request) {
	h.log.Info("got ping request")
	w.Write([]byte("pong"))
}

func (h *Handlers) MainPage(w http.ResponseWriter, r *http.Request) {
	tmpl, err := template.ParseGlob("components/*.html")
	if err != nil {
		abortWithError(w, err.Error())
		return
	}
	// get recommendations
	defUS.Recommendations, err = h.fetchRecommendations("", 5)
	if err != nil {
		panic(err)
	}
	usernameRaw := r.Context().Value("username")
	h.log.Info("got mainpage request", "username", usernameRaw)
	if usernameRaw == nil {
		tmpl.ExecuteTemplate(w, "main", defUS)
		return
	}
	username := usernameRaw.(string)
	if username == "" {
		tmpl.ExecuteTemplate(w, "main", defUS)
		return
	}
	userScore, err := h.repo.DBUserScoreGet(username)
	if err != nil {
		h.log.Warn("got db err", "err", err)
		tmpl.ExecuteTemplate(w, "main", defUS)
		return
	}
	userScore.Actions, err = h.repo.DBActionList(username)
	if err != nil {
		abortWithError(w, err.Error())
		return
	}
	userScore.Recommendations, err = h.fetchRecommendations(username, 5)
	if err != nil {
		abortWithError(w, err.Error())
		return
	}
	tmpl.ExecuteTemplate(w, "main", userScore)
}

func (h *Handlers) HandleForm(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	h.log.Info("got postform request", "payload", r.PostForm)
	magnitude := uint8(1)
	mS := r.PostFormValue("magnitude")
	if mS != "1" {
		u64, err := strconv.ParseUint(mS, 10, 64)
		magnitude = uint8(u64)
		if err != nil {
			h.log.Warn("failed to parse magnitude", "error", err,
				"payload", r.PostForm)
			magnitude = uint8(1)
		}
	}
	repeat := false
	var at models.ActionType
	switch r.PostFormValue("act_type") {
	case "plus":
		at = models.ActionTypePlus
	case "minus":
		at = models.ActionTypeMinus
		repeat = true
	default:
		h.log.Warn("uknown actiontype", "type", r.PostFormValue("act_type"))
	}
	// if r.PostFormValue("repeatable") == "on" {
	// 	repeat = true
	// }
	// convert map to action object
	act := models.Action{
		Name:       r.PostFormValue("name"),
		Magnitude:  magnitude,
		Type:       at,
		Repeatable: repeat,
		CreatedAt:  time.Now(),
	}
	// get username from ctx
	username := r.Context().Value("username").(string)
	h.log.Info("got username from ctx", "username", username)
	userScore, err := h.repo.DBUserScoreGet(username)
	if err != nil {
		abortWithError(w, err.Error())
		return
	}
	act.Username = userScore.Username
	if err := h.repo.DBActionCreate(&act); err != nil {
		abortWithError(w, err.Error())
		return
	}
	http.Redirect(w, r, "/", 302)
}

func (h *Handlers) UserScoreWithActionsByUsername(
	username string,
) (*models.UserScore, error) {
	userScore, err := h.repo.DBUserScoreGet(username)
	if err != nil {
		return nil, err
	}
	list, err := h.repo.DBActionList(username)
	if err != nil {
		return nil, err
	}
	userScore.Actions = list
	return userScore, nil
}

func (h *Handlers) HandleDoneAction(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	actionName := r.PostFormValue("name")
	username := r.Context().Value("username").(string)
	h.log.Info("got postform request", "name", actionName,
		"username", username)
	userScore, err := h.UserScoreWithActionsByUsername(username)
	if err != nil {
		abortWithError(w, err.Error())
		return
	}
	// get action by name
	action, err := h.repo.DBActionGetByName(actionName)
	magnitude := int8(action.Magnitude)
	if action.Type == models.ActionTypeMinus {
		magnitude *= -1
	}
	// change counter of user score
	userScore.Score += magnitude
	// disable action if repetable
	if err := h.repo.DBActionDone(actionName); err != nil {
		abortWithError(w, err.Error())
		return
	}
	// update score in db
	if err := h.repo.DBUserScoreUpdate(userScore); err != nil {
		abortWithError(w, err.Error())
		return
	}
	tmpl := template.Must(template.ParseGlob("components/*.html"))
	tmpl.ExecuteTemplate(w, "main", userScore)
}