/*
Copyright 2017 The Perkeep Authors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

// The scanning cabinet program is a server application to store scanned
// documents in Perkeep, and to manage them. It is a port of the
// application originally created by Brad Fitzpatrick:
// https://github.com/bradfitz/scanningcabinet.
//
// The data schema is roughly as follows:
//
// A scan is a permanode, with the node type: "scanningcabinet:scan". A scan's
// camliContent attribute is set to the actual image file. A scan also holds the
// "dateCreated" attribute, as well as the "document" attribute, which references
// the document this scan is a part of (if any).
//
// A document is a permanode, with the node type: "scanningcabinet:doc".
// A document page, is modeled by the "camliPath:sha1-xxx" = "pageNumber" relation,
// where sha1-xxx is the blobRef of a scan. A document can also hold the following
// attributes: "dateCreated", "tag", "locationText", "title", "startDate", and
// "paymentDueDate".
package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"runtime"

	"perkeep.org/pkg/app"
	"perkeep.org/pkg/buildinfo"
	"perkeep.org/pkg/webserver"
)

var (
	flagVersion = flag.Bool("version", false, "show version")
)

var (
	logger = log.New(os.Stderr, "SCANNING CABINET: ", log.LstdFlags)
	logf   = logger.Printf
)

func main() {
	flag.Parse()

	if *flagVersion {
		fmt.Fprintf(os.Stderr, "WARNING: THIS APP IS STILL EXPERIMENTAL, AND EVEN ITS DATA SCHEMA MIGHT CHANGE. DO NOT USE IN PRODUCTION.")
		fmt.Fprintf(os.Stderr, "scanningcabinet version: %s\nGo version: %s (%s/%s)\n",
			buildinfo.Summary(), runtime.Version(), runtime.GOOS, runtime.GOARCH)
		return
	}

	logf("WARNING: THIS APP IS STILL EXPERIMENTAL, AND EVEN ITS DATA SCHEMA MIGHT CHANGE. DO NOT USE IN PRODUCTION.")
	logf("Starting scanning cabinet version %s; Go %s (%s/%s)", buildinfo.Summary(), runtime.Version(),
		runtime.GOOS, runtime.GOARCH)

	listenAddr, err := app.ListenAddress()
	if err != nil {
		logger.Fatalf("Listen address: %v", err)
	}

	h, err := newHandler()
	if err != nil {
		logger.Fatalf("newHandler: %v", err)
	}

	ws := webserver.New()
	ws.Logger = logger
	ws.Handle("/", h)
	if h.httpsCert != "" {
		ws.SetTLS(webserver.TLSSetup{
			CertFile: h.httpsCert,
			KeyFile:  h.httpsKey,
		})
	}
	if err := ws.Listen(listenAddr); err != nil {
		logger.Fatalf("Listen: %v", err)
	}
	ws.Serve()
}