package main

import (
	"database/sql"
	"flag"
	"io/ioutil"
	"net/http"
	"os"
	"os/user"
	"path/filepath"
	"runtime"
	"strings"

	"github.com/drone/drone/server/database"
	"github.com/drone/drone/server/database/schema"
	"github.com/drone/drone/server/handler"
	"github.com/drone/drone/server/pubsub"
	"github.com/drone/drone/server/session"
	"github.com/drone/drone/server/worker"
	"github.com/drone/drone/shared/build/log"
	"github.com/drone/drone/shared/model"

	"github.com/gorilla/pat"
	//"github.com/justinas/nosurf"
	"github.com/GeertJohan/go.rice"
	_ "github.com/mattn/go-sqlite3"
	"github.com/russross/meddler"
)

var (
	// home directory for the application.
	home string

	// port the server will run on
	port string

	// database driver used to connect to the database
	driver string

	// driver specific connection information. In this
	// case, it should be the location of the SQLite file
	datasource string

	// optional flags for tls listener
	sslcert string
	sslkey  string

	// commit sha for the current build.
	version  string = "0.2-dev"
	revision string

	// Number of concurrent build workers to run
	// default to number of CPUs on machine
	workers int
)

func main() {

	log.SetPriority(log.LOG_NOTICE)

	// parse command line flags
	flag.StringVar(&port, "port", ":8080", "")
	flag.StringVar(&driver, "driver", "sqlite3", "")
	flag.StringVar(&datasource, "datasource", "drone.sqlite", "")
	flag.StringVar(&sslcert, "sslcert", "", "")
	flag.StringVar(&sslkey, "sslkey", "", "")
	flag.IntVar(&workers, "workers", runtime.NumCPU(), "")
	flag.Parse()

	// setup the database
	meddler.Default = meddler.SQLite
	db, _ := sql.Open(driver, datasource)
	schema.Load(db)

	// setup the database managers
	repos := database.NewRepoManager(db)
	users := database.NewUserManager(db)
	perms := database.NewPermManager(db)
	commits := database.NewCommitManager(db)
	servers := database.NewServerManager(db)
	remotes := database.NewRemoteManager(db)
	configs := database.NewConfigManager(filepath.Join(home, "config.toml"))

	// message broker
	pubsub := pubsub.NewPubSub()

	// cancel all previously running builds
	go commits.CancelAll()

	queue := make(chan *worker.Request)
	workers := make(chan chan *worker.Request)
	worker.NewDispatch(queue, workers).Start()
	worker.NewWorker(workers, users, repos, commits, configs, pubsub, &model.Server{}).Start()

	// setup the session managers
	sess := session.NewSession(users)

	// setup the router and register routes
	router := pat.New()
	handler.NewUsersHandler(users, sess).Register(router)
	handler.NewUserHandler(users, repos, commits, sess).Register(router)
	handler.NewHookHandler(users, repos, commits, configs, queue).Register(router)
	handler.NewLoginHandler(users, repos, perms, sess, configs).Register(router)
	handler.NewCommitHandler(repos, commits, perms, sess, queue).Register(router)
	handler.NewBranchHandler(repos, commits, perms, sess).Register(router)
	handler.NewRepoHandler(repos, commits, perms, sess, configs).Register(router)
	handler.NewBadgeHandler(repos, commits).Register(router)
	handler.NewConfigHandler(configs, sess).Register(router)
	handler.NewServerHandler(servers, sess).Register(router)
	handler.NewRemoteHandler(users, remotes, sess).Register(router)
	handler.NewWsHandler(repos, commits, perms, sess, pubsub).Register(router)
	//handler.NewSiteHandler(users, repos, commits, perms, sess, templ.ExecuteTemplate).Register(router)

	box := rice.MustFindBox("app/")
	fserver := http.FileServer(box.HTTPBox())
	index, _ := box.Bytes("index.html")
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		switch {
		case strings.HasPrefix(r.URL.Path, "/favicon.ico"),
			strings.HasPrefix(r.URL.Path, "/scripts/"),
			strings.HasPrefix(r.URL.Path, "/styles/"),
			strings.HasPrefix(r.URL.Path, "/views/"):
			fserver.ServeHTTP(w, r)
		case strings.HasPrefix(r.URL.Path, "/logout"),
			strings.HasPrefix(r.URL.Path, "/login/"),
			strings.HasPrefix(r.URL.Path, "/v1/"),
			strings.HasPrefix(r.URL.Path, "/ws/"):
			router.ServeHTTP(w, r)
		default:
			w.Write(index)
		}
	})

	// start webserver using HTTPS or HTTP
	if len(sslcert) != 0 {
		panic(http.ListenAndServeTLS(port, sslcert, sslkey, nil))
	} else {
		panic(http.ListenAndServe(port, nil))
	}
}

func setupDatabase() {

}

func setupQueue() {

}

func setupHandlers() {

}

// initialize the .drone directory and create a skeleton config
// file if one does not already exist.
func init() {
	// load the current user
	u, err := user.Current()
	if err != nil {
		panic(err)
	}

	// set .drone home dir
	home = filepath.Join(u.HomeDir, ".drone")

	// create the .drone home directory
	os.MkdirAll(home, 0777)

	// check for the config file
	filename := filepath.Join(u.HomeDir, ".drone", "config.toml")
	if _, err := os.Stat(filename); err != nil {
		// if not exists, create
		ioutil.WriteFile(filename, []byte(defaultConfig), 0777)
	}
}

var defaultConfig = `
# Enables user self-registration. If false, the system administrator
# will need to manually add users to the system.
registration = true

[smtp]
host = ""
port = ""
from = ""
username = ""
password = ""

[bitbucket]
url = "https://bitbucket.org"
api = "https://bitbucket.org"
client = ""
secret = ""
enabled = false

[github]
url = "https://github.com"
api = "https://api.github.com"
client = ""
secret = ""
enabled = false

[githubenterprise]
url = ""
api = ""
client = ""
secret = ""
enabled = false

[gitlab]
url = ""
api = ""
client = ""
secret = ""
enabled = false

[stash]
url = ""
api = ""
client = ""
secret = ""
enabled = false
`