from shutil import copyfile
from subprocess import check_output, CalledProcessError
import sys
import os
import platform
import subprocess

Import("env")

def is_tool(name):
    cmd = "where" if platform.system() == "Windows" else "which"
    try:
        check_output([cmd, name])
        return True
    except:
        return False;

def build_web():
    if is_tool("npm"):
        os.chdir("web")
        print("Attempting to build webpage...")
        try:
            if platform.system() == "Windows":
                print check_output(["npm.cmd", "install", "--only=dev"])
                print check_output(["node_modules\\.bin\\gulp.cmd"])
            else:
                print check_output(["npm", "install"])
                print check_output(["node_modules/.bin/gulp"])
            copyfile("build/index.html.gz.h", "../dist/index.html.gz.h")
        except OSError as e:
            print "Encountered error OSError building webpage:", e
            if e.filename:
                print "Filename is", e.filename
            print "WARNING: Failed to build web package. Using pre-built page."
        except CalledProcessError as e:
            print e.output
            print "Encountered error CalledProcessError building webpage:", e
            print "WARNING: Failed to build web package. Using pre-built page."
        except Exception as e:
            print "Encountered error", type(e).__name__, "building webpage:", e
            print "WARNING: Failed to build web package. Using pre-built page."
        finally:
            os.chdir("..");

build_web()