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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from __future__ import print_function

import os
import sys
import db_utils as dbutils
import fixture_utils as fixutils
import pexpect
import tempfile
import shutil

from steps.wrappers import run_cli, wait_prompt


def before_all(context):
    """
    Set env parameters.
    """
    os.environ['LINES'] = "100"
    os.environ['COLUMNS'] = "100"
    os.environ['PAGER'] = 'cat'
    os.environ['EDITOR'] = 'ex'

    context.package_root = os.path.abspath(
        os.path.dirname(os.path.dirname(os.path.dirname(__file__))))

    os.environ["COVERAGE_PROCESS_START"] = os.path.join(context.package_root,
                                                        '.coveragerc')

    context.exit_sent = False

    vi = '_'.join([str(x) for x in sys.version_info[:3]])
    db_name = context.config.userdata.get('pg_test_db', 'pgcli_behave_tests')
    db_name_full = '{0}_{1}'.format(db_name, vi)

    # Store get params from config.
    context.conf = {
        'host': context.config.userdata.get(
            'pg_test_host',
            os.getenv('PGHOST', 'localhost')
        ),
        'user': context.config.userdata.get(
            'pg_test_user',
            os.getenv('PGUSER', 'postgres')
        ),
        'pass': context.config.userdata.get(
            'pg_test_pass',
            os.getenv('PGPASSWORD', None)
        ),
        'port': context.config.userdata.get(
            'pg_test_port',
            os.getenv('PGPORT', '5432')
        ),
        'cli_command': (
            context.config.userdata.get('pg_cli_command', None) or
            '{python} -c "{startup}"'.format(
                python=sys.executable,
                startup='; '.join([
                    "import coverage",
                    "coverage.process_startup()",
                    "import pgcli.main",
                    "pgcli.main.cli()"]))),
        'dbname': db_name_full,
        'dbname_tmp': db_name_full + '_tmp',
        'vi': vi,
        'pager_boundary': '---boundary---',
    }
    os.environ['PAGER'] = "{0} {1} {2}".format(
        sys.executable,
        os.path.join(context.package_root, "tests/features/wrappager.py"),
        context.conf['pager_boundary'])

    # Store old env vars.
    context.pgenv = {
        'PGDATABASE': os.environ.get('PGDATABASE', None),
        'PGUSER': os.environ.get('PGUSER', None),
        'PGHOST': os.environ.get('PGHOST', None),
        'PGPASSWORD': os.environ.get('PGPASSWORD', None),
        'PGPORT': os.environ.get('PGPORT', None),
        'XDG_CONFIG_HOME': os.environ.get('XDG_CONFIG_HOME', None),
    }

    # Set new env vars.
    os.environ['PGDATABASE'] = context.conf['dbname']
    os.environ['PGUSER'] = context.conf['user']
    os.environ['PGHOST'] = context.conf['host']
    os.environ['PGPORT'] = context.conf['port']

    if context.conf['pass']:
        os.environ['PGPASSWORD'] = context.conf['pass']
    else:
        if 'PGPASSWORD' in os.environ:
            del os.environ['PGPASSWORD']

    context.cn = dbutils.create_db(context.conf['host'], context.conf['user'],
                                   context.conf['pass'], context.conf['dbname'],
                                   context.conf['port'])

    context.fixture_data = fixutils.read_fixture_files()

    # use temporary directory as config home
    context.env_config_home = tempfile.mkdtemp(prefix='pgcli_home_')
    os.environ['XDG_CONFIG_HOME'] = context.env_config_home


def after_all(context):
    """
    Unset env parameters.
    """
    dbutils.close_cn(context.cn)
    dbutils.drop_db(context.conf['host'], context.conf['user'],
                    context.conf['pass'], context.conf['dbname'],
                    context.conf['port'])

    # Remove temp config direcotry
    shutil.rmtree(context.env_config_home)

    # Restore env vars.
    for k, v in context.pgenv.items():
        if k in os.environ and v is None:
            del os.environ[k]
        elif v:
            os.environ[k] = v


def before_step(context, _):
    context.atprompt = False


def before_scenario(context, _):
    run_cli(context)
    wait_prompt(context)


def after_scenario(context, _):
    """Cleans up after each test complete."""

    if hasattr(context, 'cli') and not context.exit_sent:
        # Quit nicely.
        if not context.atprompt:
            dbname = context.currentdb
            context.cli.expect_exact(
                '{0}> '.format(dbname),
                timeout=5
            )
        context.cli.sendcontrol('u')
        context.cli.sendcontrol('d')
        context.cli.expect_exact(pexpect.EOF, timeout=5)

# TODO: uncomment to debug a failure
# def after_step(context, step):
#     if step.status == "failed":
#         import ipdb; ipdb.set_trace()