package pullrequest

import (
	"net/http"

	"forge.cadoles.com/wpetit/clearcase/internal/core/service"
	httpCtx "forge.cadoles.com/wpetit/clearcase/internal/http/context"
	"forge.cadoles.com/wpetit/clearcase/internal/http/handler/webui/common"
	"forge.cadoles.com/wpetit/clearcase/internal/http/url"
	"github.com/pkg/errors"
)

type Handler struct {
	mux   *http.ServeMux
	forge *service.ForgeManager
}

// ServeHTTP implements http.Handler.
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	h.mux.ServeHTTP(w, r)
}

func NewHandler(forge *service.ForgeManager) *Handler {
	h := &Handler{
		mux:   http.NewServeMux(),
		forge: forge,
	}

	h.mux.HandleFunc("GET /", h.getPullRequestPage)
	h.mux.HandleFunc("PUT /", h.handlePullRequestSummaryForm)
	h.mux.HandleFunc("POST /", h.handlePullRequestForm)

	return h
}

func (h *Handler) handleError(w http.ResponseWriter, r *http.Request, err error) {
	if errors.Is(err, service.ErrForgeNotAvailable) {
		baseURL := url.Mutate(httpCtx.BaseURL(r.Context()), url.WithPath("/auth/logout"))
		http.Redirect(w, r, baseURL.String(), http.StatusSeeOther)
		return
	}

	common.HandleError(w, r, errors.WithStack(err))
}

var _ http.Handler = &Handler{}