from fabric.api import task, run, local, env, cd, put, prefix, sudo

from fabric.colors import green

from fabric.contrib.project import rsync_project

from fabric.contrib.files import exists, upload_template

from fabric.context_managers import settings 

from mercurial import commands, ui, hg, cmdutil

import imp

import os, os.path

import shutil

import sys

import config

def get_export_path(version):

    base_path = os.path.join(env.base_export_path,env.export_prefix).rstrip("/")

    return os.path.expanduser(base_path) + "_%s" % (str(version))

def clean_export_folder(path):

    print("Removing %s" % path)

    if os.path.isdir(path):

        shutil.rmtree(path, ignore_errors=True)

def do_export_version(path, version):

    print("Export version %s"%str(version))

    local("hg archive -r \'%s\' \"%s\"" % (str(version),path))

    print("Export version %s done"%str(version))

def get_remote_env(remotepath, remotevirtualenvpath, platform_web_module, settings_key):

    activate_path = os.path.join(remotevirtualenvpath, "bin/activate")

    res = ""

    with prefix("source \"%s\"" % activate_path), prefix("export PYTHONPATH=\"%s\"" % remotepath), cd(remotepath):

        tempfilepath = run("mktemp -t ldtplatform.XXXXXX")

        with settings(warn_only=True):

            run("echo \"import os\" > %s" % (tempfilepath))

            map(lambda str: run("echo \"%s\" >> %s" % (str, tempfilepath)),

                ["os.environ.setdefault('DJANGO_SETTINGS_MODULE', '%s.settings')" % (platform_web_module),

                 "from django.conf import settings",

                 "print settings.%s" % (settings_key)])

            res = run("python < %s" % (tempfilepath))

        run("rm -f \"%s\"" % (tempfilepath))

    return res

def rsync_export(path, remotepath, filters):

    print("Rsync %s to %s",(path,remotepath))

    filter_option_str = "--progress --stats"

    if filters:

        filter_option_str += " " + " ".join(["--filter \"%s\"" % (f) for f in filters])

    run("mkdir -p \"%s\"" % remotepath)

    rsync_project(remotepath, local_dir=path, extra_opts=filter_option_str, delete=True)

    print("Rsync %s to %s done",(path,remotepath))

def clean_rsync_folder(remotepath):

    print("clean rsync folder %s" % remotepath)

    run("rm -fr \"%s\"" % remotepath)

def collectstatic(remotepath, remotevirtualenvpath, platform_web_module):

    print("Collect static in %s with %s" % (remotepath, remotevirtualenvpath))

    remotestaticsitepath = get_remote_env(remotepath, remotevirtualenvpath, platform_web_module, "STATIC_ROOT")

    activate_path = os.path.join(remotevirtualenvpath, "bin/activate")

    with prefix("source \"%s\"" % activate_path), prefix("export PYTHONPATH=\"%s\"" % remotepath), cd(remotepath):

        #remocve old files optio -c of collect static fail !

        run("rm -fr \"%s\"" % (remotestaticsitepath))

        run("python manage.py collectstatic --noinput")

def migrate(remotepath, remotevirtualenvpath, platform_web_module):

    print("migrate in %s with %s" % (remotepath, remotevirtualenvpath))

    activate_path = os.path.join(remotevirtualenvpath, "bin/activate")

    with prefix("source \"%s\"" % activate_path), prefix("export PYTHONPATH=\"%s\"" % remotepath), cd(remotepath):

        #remocve old files optio -c of collect static fail !

        run("python manage.py migrate --noinput")

def create_config(export_path):    

    print("Create config from %s" % (export_path,))

    remotepath = env.remote_web_path

    remote_config_path = os.path.join(remotepath, env.platform_web_module, "config.py")

    template_path = os.path.join(export_path, env.local_folders.get("web","web"), env.platform_web_module, "config.py.tmpl")

    context = {

     'base_dir': os.path.join(remotepath, env.platform_web_module).rstrip("/")+"/",

     'base_url': env.base_url,

     'web_url': env.web_url,

     'stream_url': env.stream_url,

     'stream_src_prefix': env.stream_src_prefix,

     'ffmpeg_path': env.ffmpeg_path,

     'db_engine': env.db_engine,

     'db_name': env.db_name,

     'db_user': env.db_user,

     'db_password': env.db_password,

     'db_host': env.db_host,

     'db_port': env.db_port,

     'log_file': env.log_file,

     'google_analytics_code': env.google_analytics_code,

     'email_use_tls': env.email_use_tls,

     'email_host': env.email_host,

     'email_host_user': env.email_host_user,

     'email_host_user': env.email_host_user,

     'email_port': env.email_port,

     'forbidden_stream_url': env.forbidden_stream_url,

    }

    if not exists(remote_config_path, verbose=True):

        upload_template(template_path, remote_config_path, context=context)

def export_version(version):

    print("export version %s" % str(version))

    export_path = get_export_path(version)

    clean_export_folder(export_path)

    do_export_version(export_path,version)

    return export_path

def do_create_virtualenv(remote_venv_export_path, remotevirtualenvpath):

    print("Create virtualenv export_path : %s - remote venvpath : %s" % (remote_venv_export_path, remotevirtualenvpath))

    activate_path = os.path.join(remotevirtualenvpath, "bin/activate")

    if "remote_baseline_venv" in env and env.remote_baseline_venv:

        prefix_str = "source \"%s\"" % os.path.join(env.remote_baseline_venv, "bin/activate")

    else:

        prefix_str = "echo"

    with settings(warn_only=True):

        run("rm -fr \"%s\"" % remotevirtualenvpath)

    run("mkdir -p \"%s\"" % remotevirtualenvpath)

    with prefix(prefix_str), cd(os.path.join(remote_venv_export_path,"virtualenv","web")):

        run("python create_python_env.py")

        run("python project-boot.py \"%s\"" % remotevirtualenvpath)

    with prefix("source \"%s\"" % activate_path):

        run("pip install -r \"%s\"" % os.path.join(remote_venv_export_path,"virtualenv","web","res","srvr_requirements.txt"))

def do_sync_web(version, export_path):

    print("do_sync_web with version %s and path %s" % (version,export_path))

    web_path = os.path.join(export_path,env.local_folders.get("web","web").rstrip("/")+"/") 

    rsync_export(web_path, env.remote_web_path, env.web_rsync_filters)

def remove_lib(path):

    print("remove build build %s" % path)

    run("rm \"%s\"" % path)

def install_lib(remotepath, remotevirtualenvpath):

    print("Install lib %s in %s" % (remotepath, remotevirtualenvpath))

    activate_path = os.path.join(remotevirtualenvpath, "bin/activate")

    with prefix("source %s" % activate_path):

        run("pip install \"%s\"" % remotepath)

def sync_lib(path):

    print("Sync build %s" % path)

    run("mkdir -p \"%s\"" % env.remote_venv_export_path)

    with cd(env.remote_venv_export_path):

        filename = os.path.basename(path)

        dest_path = os.path.join(env.remote_venv_export_path, filename)

        res_trans = put(path, dest_path)

        print("Sync build %s to %s" % (path,repr(res_trans)))

        return res_trans

def sync_install_lib(lib_path):

    res_trans = None

    try:

        res_trans = sync_lib(lib_path)

        install_lib(res_trans[0], env.remote_virtualenv_path)        

    finally:

        if res_trans:

            remove_lib(res_trans[0])

def check_folder_access():

    print("Check folder access")

    # get remote user

    for folder_path in env.folders:

        if not os.path.isabs(folder_path):

            folder_path = env.remote_web_path.rstrip("/")+ "/" + folder_path

            with settings(warn_only=True):

                if not exists(folder_path):

                    run("mkdir -p \"%s\"" % folder_path)

                run("chown -R -c :%s \"%s\"" % (env.web_group, folder_path))

                run("chmod -R -c g+w \"%s\"" % folder_path)

@task

def relaunch_server(do_collectstatic=True, do_migrate=True):

    print("Relaunch server")

    check_folder_access()

    if do_collectstatic:

        collectstatic(env.remote_web_path, env.remote_virtualenv_path, env.platform_web_module)

    if do_migrate:

        migrate(env.remote_web_path, env.remote_virtualenv_path, env.platform_web_module)

    sudo(env.web_relaunch_cmd, shell=False)

@task

def sync_web(version):

    print(green("sync web with version %s" % version))

    export_path = export_version(version)

    do_sync_web(version, export_path)

    create_config(export_path)

    clean_export_folder(export_path)

    relaunch_server()

@task

def update_lib(version, package):

    print(green("update ldt with version %s" % version))

    export_path = export_version(version)

    lib_path = os.path.join(export_path, env.local_folders.get("virtualenv","virtualenv"), "res", "lib")

    f, pathname, description = imp.find_module("patch", [lib_path])

    patch = imp.load_module("patch", f, pathname, description)

    f, pathname, description = imp.find_module("lib_create_env", [lib_path])

    lib_create_env = imp.load_module("lib_create_env", f, pathname, description)

    package_path = os.path.join(export_path, env.local_folders.get("virtualenv","virtualenv"), "res", "src", lib_create_env.URLS[package]['local'])

    sync_install_lib(package_path)

    clean_export_folder(export_path)

    relaunch_server()

@task

def create_virtualenv(version):

    print(green("create virtualenv with version %s" % version))

    export_path = export_version(version)

    venv_remote_export_path = ""

    try:

        virtualenv_path = os.path.join(export_path, env.local_folders.get("virtualenv","virtualenv"))

        venv_remote_export_path = os.path.join(env.remote_venv_export_path, env.export_prefix, version,"virtualenv")

        rsync_export(virtualenv_path, venv_remote_export_path, env.venv_rsync_filters)

        do_create_virtualenv(venv_remote_export_path, env.remote_virtualenv_path)

    finally:

        clean_export_folder(export_path)

        if venv_remote_export_path:

            clean_rsync_folder(venv_remote_export_path)