package api

import (
	"encoding/json"
	"errors"
	"strconv"

	"git.nemunai.re/checkhome/struct"

	"github.com/julienschmidt/httprouter"
)

func init() {
	router.GET("/api/rooms", apiHandler(func (_ httprouter.Params, _ []byte) (interface{}, error) {
		return ckh.GetRooms()
	}))
	router.POST("/api/rooms", apiHandler(newRoom))
	router.DELETE("/api/rooms", apiHandler(func (_ httprouter.Params, _ []byte) (interface{}, error) {
		return ckh.ClearRooms()
	}))

	router.GET("/api/rooms/:rid", apiHandler(roomHandler(func (room ckh.Room, _ []byte) (interface{}, error) {
		return room, nil
	})))
	router.PUT("/api/rooms/:rid", apiHandler(roomHandler(updateRoom)))
	router.DELETE("/api/rooms/:rid", apiHandler(roomHandler(func (room ckh.Room, _ []byte) (interface{}, error) {
		return room.Delete()
	})))
}

func roomHandler(f func(ckh.Room, []byte) (interface{}, error)) func(httprouter.Params, []byte) (interface{}, error) {
	return func(ps httprouter.Params, body []byte) (interface{}, error) {
		if rid, err := strconv.ParseInt(string(ps.ByName("rid")), 10, 64); err != nil {
			return nil, err
		} else if room, err := ckh.GetRoom(rid); err != nil {
			return nil, err
		} else {
			return f(room, body)
		}
	}
}

func newRoom(_ httprouter.Params, body []byte) (interface{}, error) {
	var ur ckh.Room
	if err := json.Unmarshal(body, &ur); err != nil {
		return nil, err
	}

	if len(ur.Label) == 0 {
		return nil, errors.New("Room's label cannot be empty")
	}

	return ckh.NewRoom(ur.Label)
}

func updateRoom(room ckh.Room, body []byte) (interface{}, error) {
	var ur ckh.Room
	if err := json.Unmarshal(body, &ur); err != nil {
		return nil, err
	}

	if len(ur.Label) == 0 {
		return nil, errors.New("Room's label cannot be empty")
	}

	ur.Id = room.Id

	if _, err := ur.Update(); err != nil {
		return nil, err
	} else {
		return ur, nil
	}
}