package main

import (
	"errors"
	"io"
)

var ApiImagesRouting = map[string]struct {
	AuthFunction
	DispatchFunction
}{
	"GET":    {PublicPage, listImages},
	"POST":   {PublicPage, addImage},
	"DELETE": {PrivatePage, hideImage},
}

var ApiNextImagesRouting = map[string]struct {
	AuthFunction
	DispatchFunction
}{
	"GET":    {PrivatePage, listNextImages},
	"POST":   {PublicPage, addImage},
	"DELETE": {PrivatePage, deleteImage},
}

func listImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
	if len(args) < 1 {
		return GetPublishedImages()
	} else if args[0] == "last" {
		return GetLastImage()
	} else {
		return GetPublishedImage(args[0])
	}
}

func listNextImages(u *User, args []string, body io.ReadCloser) (interface{}, error) {
	if len(args) < 1 {
		return GetNextImages()
	} else if len(args) >= 2 && args[1] == "publish" {
		if pict, err := GetNextImage(args[0]); err != nil {
			return nil, err
		} else if err := pict.Publish(); err != nil {
			return nil, err
		} else {
			return true, nil
		}
	} else {
		return GetNextImage(args[0])
	}
}

func addImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
	if len(args) < 1 {
		return nil, errors.New("Need an image identifier to create")
	} else if err := AddImage(args[0], body); err != nil {
		return nil, err
	} else {
		return true, nil
	}
}

func hideImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
	if len(args) < 1 {
		return nil, errors.New("Need an image identifier to delete")
	} else if pict, err := GetPublishedImage(args[0]); err != nil {
		return nil, errors.New("No matching image")
	} else if err := pict.Unpublish(); err != nil {
		return nil, err
	} else {
		return true, nil
	}
}

func deleteImage(u *User, args []string, body io.ReadCloser) (interface{}, error) {
	if len(args) < 1 {
		return nil, errors.New("Need an image identifier to delete")
	} else if pict, err := GetNextImage(args[0]); err != nil {
		return nil, errors.New("No matching image")
	} else if err := pict.Remove(); err != nil {
		return nil, err
	} else {
		return true, nil
	}
}