# Copyright (c) 2010 Google Inc. All rights reserved.
# Copyright (c) 2009 Apple Inc. All rights reserved.
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"""blink_tool.py is a tool with multiple sub-commands with different purposes.

It has commands for printing expectations, fetching new test baselines, etc.
These commands don't necessarily have anything to do with each other.
"""

import logging
import optparse
import sys

from blinkpy.common.host import Host
from blinkpy.tool.commands.analyze_baselines import AnalyzeBaselines
from blinkpy.tool.commands.command import HelpPrintingOptionParser
from blinkpy.tool.commands.copy_existing_baselines import CopyExistingBaselines
from blinkpy.tool.commands.flaky_tests import FlakyTests
from blinkpy.tool.commands.help_command import HelpCommand
from blinkpy.tool.commands.optimize_baselines import OptimizeBaselines
from blinkpy.tool.commands.pretty_diff import PrettyDiff
from blinkpy.tool.commands.queries import CrashLog
from blinkpy.tool.commands.queries import PrintBaselines
from blinkpy.tool.commands.queries import PrintExpectations
from blinkpy.tool.commands.rebaseline import Rebaseline
from blinkpy.tool.commands.rebaseline_cl import RebaselineCL
from blinkpy.tool.commands.rebaseline_test import RebaselineTest

_log = logging.getLogger(__name__)


class BlinkTool(Host):
    # FIXME: It might make more sense if this class had a Host attribute
    # instead of being a Host subclass.

    global_options = [
        optparse.make_option(
            '-v',
            '--verbose',
            action='store_true',
            dest='verbose',
            default=False,
            help='enable all logging'),
        optparse.make_option(
            '-d',
            '--directory',
            action='append',
            default=[],
            help='Directory to look at for changed files'),
    ]

    def __init__(self, path):
        super(BlinkTool, self).__init__()
        self._path = path
        self.commands = [
            AnalyzeBaselines(),
            CopyExistingBaselines(),
            CrashLog(),
            FlakyTests(),
            OptimizeBaselines(),
            PrettyDiff(),
            PrintBaselines(),
            PrintExpectations(),
            Rebaseline(),
            RebaselineCL(),
            RebaselineTest(),
        ]
        self.help_command = HelpCommand(tool=self)
        self.commands.append(self.help_command)

    def main(self, argv=None):
        argv = argv or sys.argv
        (command_name, args) = self._split_command_name_from_args(argv[1:])

        option_parser = self._create_option_parser()
        self._add_global_options(option_parser)

        command = self.command_by_name(command_name) or self.help_command
        if not command:
            option_parser.error('%s is not a recognized command', command_name)

        command.set_option_parser(option_parser)
        (options, args) = command.parse_args(args)

        result = command.check_arguments_and_execute(options, args, self)
        return result

    def path(self):
        return self._path

    @staticmethod
    def _split_command_name_from_args(args):
        # Assume the first argument which doesn't start with "-" is the command name.
        command_index = 0
        for arg in args:
            if arg[0] != '-':
                break
            command_index += 1
        else:
            return (None, args[:])

        command = args[command_index]
        return (command, args[:command_index] + args[command_index + 1:])

    def _create_option_parser(self):
        usage = 'Usage: %prog [options] COMMAND [ARGS]'
        name = optparse.OptionParser().get_prog_name()
        return HelpPrintingOptionParser(
            epilog_method=self.help_command.help_epilog,
            prog=name,
            usage=usage)

    def _add_global_options(self, option_parser):
        global_options = self.global_options or []
        for option in global_options:
            option_parser.add_option(option)

    def name(self):
        return optparse.OptionParser().get_prog_name()

    def should_show_in_main_help(self, command):
        return command.show_in_main_help

    def command_by_name(self, command_name):
        for command in self.commands:
            if command_name == command.name:
                return command
        return None