// Copyright (c) 2020, Andreas Schneider
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the <organization> nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package main

import (
	crand "crypto/rand"
	"math"
	"math/big"
	"math/rand"

	"github.com/alecthomas/kong"
)

type app struct {
	config
	CmdUser  CmdUser  `cmd:"" name:"user" help:"Manage users."`
	CmdShare CmdShare `cmd:"" name:"share" help:"Manage shares."`

	userStore  UserStore
	shareStore ShareStore
}

func main() {
	// When we need simple randomization (not cryptographically secure one), we should at least start
	// with some non-default-seed.
	seed, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64))
	if err != nil {
		panic("cannot initialize rand: " + err.Error())
	}
	rand.Seed(seed.Int64())

	var app app
	ctx := kong.Parse(&app)

	store, err := NewDBStore(app.config.Db)
	ctx.FatalIfErrorf(err)
	defer store.Close()

	app.userStore = store
	app.shareStore = store

	ctx.FatalIfErrorf(ctx.Run(&app))

	//c := LoadConfig(*configFile)
	//
	//h := &webdav.Handler{}
	//h.Prefix = "/share/"
	//h.LockSystem = webdav.NewMemLS()
	//h.FileSystem = BaseDir(c.BaseDirectory)
	//
	//authenticatedWebdavHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
	//	username, password, ok := r.BasicAuth()
	//	directory := ""
	//	if ok {
	//		ok, directory = c.ValidateDAVUser(username, password)
	//	}
	//	if !ok {
	//		w.Header().Set("WWW-Authenticate", `Basic realm="ShareDAV"`)
	//		http.Error(w, "unauthorized", http.StatusUnauthorized)
	//		return
	//	}
	//
	//	shareName := chi.URLParam(r, "share")
	//	directoryMapping := DirectoryMapping{
	//		VirtualName: shareName,
	//		RealName:    directory,
	//	}
	//
	//	// Use the WebDAV handler to actually serve the request. Also enhance the context
	//	// to contain the subdirectory (of the base directory) which contains the data for
	//	// the authenticated user.
	//	h.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), "mapping", &directoryMapping)))
	//})
	//
	//r := chi.NewRouter()
	//r.Handle("/share/{share}/*", authenticatedWebdavHandler)
	//
	//http.ListenAndServe(c.ListenAddress, r)
}