package server

import (
	"encoding/json"
	"log/slog"
	"net/http"

	"github.com/go-chi/chi/v5"

	mcdslauth "git.wntrmute.dev/mc/mcdsl/auth"
	"git.wntrmute.dev/mc/mcdsl/health"

	"git.wntrmute.dev/mc/mcq/internal/db"
)

// Deps holds dependencies injected into the REST handlers.
type Deps struct {
	DB     *db.DB
	Auth   *mcdslauth.Authenticator
	Logger *slog.Logger
}

// RegisterRoutes adds all MCQ REST endpoints to the given router.
func RegisterRoutes(r chi.Router, deps Deps) {
	// Public endpoints.
	r.Post("/v1/auth/login", loginHandler(deps.Auth))
	r.Get("/v1/health", health.Handler(deps.DB.DB))

	// Authenticated endpoints.
	r.Group(func(r chi.Router) {
		r.Use(requireAuth(deps.Auth))

		r.Post("/v1/auth/logout", logoutHandler(deps.Auth))

		r.Get("/v1/documents", listDocumentsHandler(deps.DB))
		r.Get("/v1/documents/{slug}", getDocumentHandler(deps.DB))
		r.Put("/v1/documents/{slug}", putDocumentHandler(deps.DB))
		r.Delete("/v1/documents/{slug}", deleteDocumentHandler(deps.DB))
		r.Post("/v1/documents/{slug}/read", markReadHandler(deps.DB))
		r.Post("/v1/documents/{slug}/unread", markUnreadHandler(deps.DB))
	})
}

// writeJSON writes a JSON response with the given status code.
func writeJSON(w http.ResponseWriter, status int, v any) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(v)
}

// writeError writes a standard error response.
func writeError(w http.ResponseWriter, status int, message string) {
	writeJSON(w, status, map[string]string{"error": message})
}