package quiz

import (
	"context"
	"net/http"

	httpCtx "forge.cadoles.com/wpetit/kouiz/internal/http/context"
	"forge.cadoles.com/wpetit/kouiz/internal/http/handler/webui/common"
	"forge.cadoles.com/wpetit/kouiz/internal/http/handler/webui/quiz/component"
	"forge.cadoles.com/wpetit/kouiz/internal/store"
	"github.com/a-h/templ"
	"github.com/pkg/errors"
	"gorm.io/gorm"
)

func (h *Handler) getResultPage(w http.ResponseWriter, r *http.Request) {
	vmodel, err := h.fillResultPageVModel(r)
	if err != nil {
		h.handleError(w, r, errors.WithStack(err))
		return
	}

	if vmodel.Entry == nil {
		baseURL := httpCtx.BaseURL(r.Context())
		http.Redirect(w, r, baseURL.String(), http.StatusTemporaryRedirect)
		return
	}

	resultPage := component.ResultPage(*vmodel)
	templ.Handler(resultPage).ServeHTTP(w, r)
}

func (h *Handler) fillResultPageVModel(r *http.Request) (*component.ResultPageVModel, error) {
	vmodel := &component.ResultPageVModel{}

	err := common.FillViewModel(
		r.Context(), vmodel, r,
		h.fillResultPagePlayer,
		h.fillResultPageSelectedEntry,
	)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	return vmodel, nil
}

func (h *Handler) fillResultPagePlayer(ctx context.Context, vmodel *component.ResultPageVModel, r *http.Request) error {
	player, err := h.getRequestPlayer(r)
	if err != nil {
		return errors.WithStack(err)
	}

	vmodel.Player = player

	rank, err := h.store.GetPlayerRank(ctx, player.ID)
	if err != nil {
		return errors.WithStack(err)
	}

	vmodel.PlayerRank = rank

	return nil
}

func (h *Handler) fillResultPageSelectedEntry(ctx context.Context, vmodel *component.ResultPageVModel, r *http.Request) error {
	if vmodel.Player == nil || vmodel.Player.SelectedEntry == nil {
		return nil
	}

	var entry *store.QuizEntry
	err := h.store.Do(ctx, func(db *gorm.DB) error {
		err := db.Model(&entry).Preload("Category").First(&entry, "id = ?", vmodel.Player.SelectedEntry).Error
		if err != nil {
			return errors.WithStack(err)
		}
		return nil
	})
	if err != nil {
		return errors.WithStack(err)
	}

	vmodel.Entry = entry

	if vmodel.Player.SelectedAnswer != nil && *vmodel.Player.SelectedAnswer >= 0 && *vmodel.Player.SelectedAnswer < len(entry.Propositions) {
		selectedAnswer := entry.Propositions[*vmodel.Player.SelectedAnswer]
		vmodel.Won = selectedAnswer == entry.Answer
	}

	return nil
}