package player

import (
	"context"
	"crypto/tls"
	"fmt"
	"os"

	"forge.cadoles.com/arcad/arcast"
	"forge.cadoles.com/arcad/arcast/pkg/browser"
	"forge.cadoles.com/arcad/arcast/pkg/browser/dummy"
	"forge.cadoles.com/arcad/arcast/pkg/browser/lorca"
	"forge.cadoles.com/arcad/arcast/pkg/config"
	"forge.cadoles.com/arcad/arcast/pkg/server"
	"github.com/pkg/errors"
	"github.com/urfave/cli/v2"
	"gitlab.com/wpetit/goweb/logger"
)

func Run() *cli.Command {
	defaults := lorca.NewOptions()

	return &cli.Command{
		Name: "run",
		Flags: []cli.Flag{
			&cli.StringFlag{
				Name:    "config",
				EnvVars: []string{"ARCAST_DESKTOP_CONFIG"},
				Value:   config.DefaultConfigFile(context.Background()),
			},
			&cli.StringSliceFlag{
				Name:    "additional-chrome-arg",
				EnvVars: []string{"ARCAST_DESKTOP_ADDITIONAL_CHROME_ARGS"},
				Value:   cli.NewStringSlice("incognito"),
			},
			&cli.StringFlag{
				Name:    "instance-id",
				EnvVars: []string{"ARCAST_DESKTOP_INSTANCE_ID"},
				Value:   "",
			},
			&cli.StringFlag{
				Name:    "address",
				EnvVars: []string{"ARCAST_DESKTOP_ADDRESS"},
				Value:   ":",
			},
			&cli.StringFlag{
				Name:    "https-address",
				EnvVars: []string{"ARCAST_DESKTOP_HTTPS_ADDRESS"},
				Value:   ":",
			},
			&cli.IntFlag{
				Name:    "window-height",
				EnvVars: []string{"ARCAST_DESKTOP_WINDOW_HEIGHT"},
				Value:   defaults.Height,
			},
			&cli.BoolFlag{
				Name:    "apps",
				EnvVars: []string{"ARCAST_DESKTOP_APPS"},
				Value:   false,
			},
			&cli.IntFlag{
				Name:    "window-width",
				EnvVars: []string{"ARCAST_DESKTOP_WINDOW_WIDTH"},
				Value:   defaults.Width,
			},
			&cli.StringSliceFlag{
				Name:    "allowed-origins",
				EnvVars: []string{"ARCAST_DESKTOP_ALLOWED_ORIGINS"},
				Value:   cli.NewStringSlice(),
			},
			&cli.BoolFlag{
				Name:    "dummy-browser",
				EnvVars: []string{"ARCAST_DESKTOP_DUMMY_BROWSER"},
				Value:   false,
			},
		},
		Action: func(ctx *cli.Context) error {
			configFile := ctx.String("config")
			windowHeight := ctx.Int("window-height")
			windowWidth := ctx.Int("window-width")
			chromeArgs := addFlagsPrefix(ctx.StringSlice("additional-chrome-arg")...)
			dummyBrowser := ctx.Bool("dummy-browser")

			var browser browser.Browser

			if dummyBrowser {
				logger.Info(ctx.Context, "using dummy browser")
				browser = dummy.NewBrowser()
			} else {
				lorcaBrowser := lorca.NewBrowser(
					lorca.WithAdditionalChromeArgs(chromeArgs...),
					lorca.WithWindowSize(windowWidth, windowHeight),
				)

				if err := lorcaBrowser.Start(); err != nil {
					return errors.Wrap(err, "could not start browser")
				}

				go func() {
					lorcaBrowser.Wait()
					logger.Warn(ctx.Context, "browser was closed")
					os.Exit(1)
				}()

				defer func() {
					logger.Info(ctx.Context, "stopping browser")
					if err := lorcaBrowser.Stop(); err != nil {
						logger.Error(ctx.Context, "could not stop browser", logger.CapturedE(errors.WithStack(err)))
					}
				}()

				browser = lorcaBrowser
			}

			conf := config.DefaultConfig()

			logger.Info(ctx.Context, "loading or creating configuration file", logger.F("filename", configFile))
			if err := config.LoadOrCreate(ctx.Context, configFile, conf, config.DefaultTransforms...); err != nil {
				logger.Error(ctx.Context, "could not load configuration file", logger.CapturedE(errors.WithStack(err)))
			}

			instanceID := ctx.String("instance-id")
			if instanceID != "" {
				conf.InstanceID = instanceID
			}

			cert, err := tls.X509KeyPair(conf.HTTPS.Cert, conf.HTTPS.Key)
			if err != nil {
				return errors.Wrap(err, "could not parse tls cert/key pair")
			}

			if ctx.IsSet("apps") {
				conf.Apps.Enabled = ctx.Bool("apps")
			}

			if ctx.IsSet("address") {
				conf.HTTP.Address = ctx.String("address")
			}

			if ctx.IsSet("https-address") {
				conf.HTTPS.Address = ctx.String("tls-address")
			}

			if ctx.IsSet("allowed-origins") {
				conf.AllowedOrigins = ctx.StringSlice("allowed-origins")
			}

			server := server.New(browser,
				server.WithInstanceID(conf.InstanceID),
				server.WithAppsEnabled(conf.Apps.Enabled),
				server.WithDefaultApp(conf.Apps.DefaultApp),
				server.WithApps(arcast.DefaultApps...),
				server.WithAddress(conf.HTTP.Address),
				server.WithTLSAddress(conf.HTTPS.Address),
				server.WithTLSCertificate(&cert),
				server.WithAllowedOrigins(conf.AllowedOrigins...),
			)

			if err := server.Start(); err != nil {
				return errors.Wrap(err, "could not start server")
			}

			defer func() {
				if err := server.Stop(); err != nil {
					logger.Error(ctx.Context, "could not stop server", logger.CapturedE(errors.WithStack(err)))
				}
			}()

			if err := server.Wait(); err != nil {
				return errors.Wrap(err, "could not wait for server")
			}

			return nil
		},
	}
}

func addFlagsPrefix(stripped ...string) []string {
	flags := make([]string, len(stripped))
	for i, s := range stripped {
		flags[i] = fmt.Sprintf("--%s", s)
	}
	return flags
}