package handlers

import (
	"context"
	"encoding/json"
	"net/http"
	"time"

	"git.eeqj.de/sneak/gohttpserver/internal/globals"
	"github.com/rs/zerolog"
	"go.uber.org/fx"
	"google.golang.org/genproto/googleapis/spanner/admin/database/v1"
)

type HandlersParams struct {
	fx.In
	Logger   *zerolog.Logger
	Globals  globals.Globals
	Database database.Database
}

type Handlers struct {
	params HandlersParams
	log    *zerolog.Logger
}

func New(lc fx.Lifecycle, params HandlersParams) (*Handlers, error) {
	s := new(Handlers)
	s.params = params
	s.log = params.Logger.Get()
	lc.Append(fx.Hook{
		OnStart: func(ctx context.Context) error {
			// FIXME compile some templates here or something
		},
	})
	return s, nil
}

func (s *Handlers) HandleNow() http.HandlerFunc {
	type response struct {
		Now time.Time `json:"now"`
	}
	return func(w http.ResponseWriter, r *http.Request) {
		s.respondJSON(w, r, &response{Now: time.Now()}, 200)
	}
}

func (s *Handlers) respondJSON(w http.ResponseWriter, r *http.Request, data interface{}, status int) {
	w.WriteHeader(status)
	w.Header().Set("Content-Type", "application/json")
	if data != nil {
		err := json.NewEncoder(w).Encode(data)
		if err != nil {
			s.log.Error().Err(err).Msg("json encode error")
		}
	}
}

func (s *Handlers) decodeJSON(w http.ResponseWriter, r *http.Request, v interface{}) error { // nolint
	return json.NewDecoder(r.Body).Decode(v)
}