// ForceDestroy destroys an app with force.
//
// Destroying an app is a process composed of four steps:
//
//       1. Destroy the bucket and S3 credentials (if bucket-support is
//       enabled).
//       2. Destroy the app unit using juju
//       3. Unbind all service instances from the app
//       4. Remove the app from the database
func ForceDestroy(app *App) error {
	gUrl := repository.GitServerUri()
	(&gandalf.Client{Endpoint: gUrl}).RemoveRepository(app.Name)
	useS3, _ := config.GetBool("bucket-support")
	if useS3 {
		destroyBucket(app)
	}
	if len(app.Units) > 0 {
		Provisioner.Destroy(app)
		app.unbind()
	}
	token := app.Env["TSURU_APP_TOKEN"].Value
	auth.DeleteToken(token)
	conn, err := db.Conn()
	if err != nil {
		return err
	}
	defer conn.Close()
	return conn.Apps().Remove(bson.M{"name": app.Name})
}

// Delete deletes an app.
//
// Delete an app is a process composed of four steps:
//
//       1. Destroy the bucket and S3 credentials (if bucket-support is
//       enabled).
//       2. Destroy the app unit using juju
//       3. Unbind all service instances from the app
//       4. Remove the app from the database
func Delete(app *App) error {
	gURL := repository.ServerURL()
	(&gandalf.Client{Endpoint: gURL}).RemoveRepository(app.Name)
	useS3, _ := config.GetBool("bucket-support")
	if useS3 {
		destroyBucket(app)
	}
	if len(app.Units) > 0 {
		Provisioner.Destroy(app)
		app.unbind()
	}
	token := app.Env["TSURU_APP_TOKEN"].Value
	auth.DeleteToken(token)
	if owner, err := auth.GetUserByEmail(app.Owner); err == nil {
		auth.ReleaseApp(owner)
	}
	conn, err := db.Conn()
	if err != nil {
		return err
	}
	defer conn.Close()
	return conn.Apps().Remove(bson.M{"name": app.Name})
}

func logout(w http.ResponseWriter, r *http.Request, t *auth.Token) error {
	auth.DeleteToken(t.Token)
	return nil
}

				envVars = append(envVars, bind.EnvVar{
					Name:         fmt.Sprintf("TSURU_S3_%s", name),
					Value:        value,
					InstanceName: s3InstanceName,
				})
			}
		}
		err = app.setEnvsToApp(envVars, false, true)
		if err != nil {
			return nil, err
		}
		return ctx.Previous, nil
	},
	Backward: func(ctx action.BWContext) {
		app := ctx.Params[0].(*App)
		auth.DeleteToken(app.Env["TSURU_APP_TOKEN"].Value)
		if app.Get() == nil {
			s3Env := app.InstanceEnv(s3InstanceName)
			vars := make([]string, len(s3Env)+3)
			i := 0
			for k := range s3Env {
				vars[i] = k
				i++
			}
			vars[i] = "TSURU_HOST"
			vars[i+1] = "TSURU_APPNAME"
			vars[i+2] = "TSURU_APP_TOKEN"
			app.UnsetEnvs(vars, false)
		}
	},
	MinParams: 1,