package handlers

import (
	"encoding/json"
	"errors"
	"net/http"

	"gogs.fxtmmsk.ru/foxtime/photoplaces/backend/internal/repository"
	"gogs.fxtmmsk.ru/foxtime/photoplaces/backend/internal/services"
	"gogs.fxtmmsk.ru/foxtime/photoplaces/backend/internal/validator"
)

type SetupHandler struct {
	userRepo *repository.UserRepo
	authSvc  *services.AuthService
	isProd   bool
}

func NewSetupHandler(userRepo *repository.UserRepo, authSvc *services.AuthService, appEnv string) *SetupHandler {
	return &SetupHandler{
		userRepo: userRepo,
		authSvc:  authSvc,
		isProd:   appEnv == "production",
	}
}

func (h *SetupHandler) Status(w http.ResponseWriter, r *http.Request) {
	hasSuperadmin, err := h.userRepo.HasSuperadmin(r.Context())
	if err != nil {
		writeError(w, http.StatusInternalServerError, "failed to check setup status", err)
		return
	}
	writeJSON(w, http.StatusOK, map[string]bool{"has_superadmin": hasSuperadmin})
}

type setupRequest struct {
	Email    string `json:"email" validate:"required,email,max=255"`
	Password string `json:"password" validate:"required,min=8,max=72"`
	Name     string `json:"name" validate:"omitempty,max=255"`
}

func (h *SetupHandler) Setup(w http.ResponseWriter, r *http.Request) {
	hasSuperadmin, err := h.userRepo.HasSuperadmin(r.Context())
	if err != nil {
		writeError(w, http.StatusInternalServerError, "failed to check setup status", err)
		return
	}
	if hasSuperadmin {
		writeError(w, http.StatusConflict, "superadmin already exists", nil)
		return
	}

	r.Body = http.MaxBytesReader(w, r.Body, maxRequestBodySize)
	var req setupRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		writeError(w, http.StatusBadRequest, "invalid request body", err)
		return
	}

	if err := validator.Validate(req); err != nil {
		writeValidationError(w, err)
		return
	}

	result, refreshToken, err := h.authSvc.Register(r.Context(), services.RegisterInput{
		Email:    req.Email,
		Password: req.Password,
		Role:     "superadmin",
		Name:     req.Name,
	})
	if err != nil {
		if errors.Is(err, services.ErrEmailExists) {
			writeError(w, http.StatusConflict, "email already exists", err)
			return
		}
		writeError(w, http.StatusInternalServerError, "setup failed", err)
		return
	}

	setRefreshTokenCookie(w, refreshToken, h.isProd)
	writeJSON(w, http.StatusCreated, result)
}