#!/usr/bin/env python
# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from skypy.paths import Paths
from skypy.skyserver import SkyServer
import argparse
import logging
import os
import skypy.configuration as configuration
import subprocess
import urlparse


SUPPORTED_MIME_TYPES = [
    'text/html',
    'text/sky',
    'text/plain',
]


HTTP_PORT = 9999


class SkyDebugger(object):
    def __init__(self):
        self.paths = None

    def _server_root_and_url_from_path_arg(self, url_or_path):
        # This is already a valid url we don't need a local server.
        if urlparse.urlparse(url_or_path).scheme:
            return None, url_or_path

        path = os.path.abspath(url_or_path)
        if os.path.commonprefix([path, self.paths.src_root]) == self.paths.src_root:
            server_root = self.paths.src_root
        else:
            server_root = os.path.dirname(path)
            logging.warn(
                '%s is outside of mojo root, using %s as server root' %
                (path, server_root))
        local_url = SkyServer.url_for_path(HTTP_PORT, server_root, path)
        return server_root, local_url

    def _in_chromoting(self):
        return os.environ.get('CHROME_REMOTE_DESKTOP_SESSION', False)

    def main(self):
        logging.basicConfig(level=logging.INFO)

        parser = argparse.ArgumentParser(description='Sky launcher/debugger')
        parser.add_argument('--gdb', action='store_true')
        parser.add_argument('--use-osmesa', action='store_true',
            default=self._in_chromoting())
        parser.add_argument('url_or_path', nargs='?', type=str)
        configuration.add_arguments(parser)
        args = parser.parse_args()

        self.paths = Paths(os.path.join('out', args.configuration))

        content_handlers = ['%s,%s' % (mime_type, 'mojo:sky_viewer')
            for mime_type in SUPPORTED_MIME_TYPES]
        shell_command = [
            self.paths.mojo_shell_path,
            '--v=1',
            '--content-handlers=%s' % ','.join(content_handlers),
            '--url-mappings=mojo:window_manager=mojo:sky_debugger',
            'mojo:window_manager',
        ]
        if args.use_osmesa:
            shell_command.append('--args-for=mojo:native_viewport_service --use-osmesa')

        server_root = None

        if args.url_or_path:
            # Check if we need a local server for the url/path arg:
            server_root, url = \
                self._server_root_and_url_from_path_arg(args.url_or_path)
            prompt_args = '--args-for=mojo:sky_debugger_prompt %s' % url
            shell_command.append(prompt_args)

        if args.gdb:
            shell_command = ['gdb', '--args'] + shell_command

        if server_root:
            with SkyServer(self.paths, HTTP_PORT, args.configuration,
                    server_root):
                subprocess.check_call(shell_command)
        else:
            subprocess.check_call(shell_command)


if __name__ == '__main__':
    SkyDebugger().main()