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

from conda.common.io import attach_stderr_handler, captured, CaptureTarget
from io import StringIO
from logging import DEBUG, NOTSET, WARN, getLogger
import sys


def test_captured():
    stdout_text = "stdout text"
    stderr_text = "stderr text"

    def print_captured(*args, **kwargs):
        with captured(*args, **kwargs) as c:
            print(stdout_text, end="")
            print(stderr_text, end="", file=sys.stderr)
        return c

    c = print_captured()
    assert c.stdout == stdout_text
    assert c.stderr == stderr_text

    c = print_captured(CaptureTarget.STRING, CaptureTarget.STRING)
    assert c.stdout == stdout_text
    assert c.stderr == stderr_text

    c = print_captured(stderr=CaptureTarget.STDOUT)
    assert c.stdout == stdout_text + stderr_text
    assert c.stderr is None

    caller_stdout = StringIO()
    caller_stderr = StringIO()
    c = print_captured(caller_stdout, caller_stderr)
    assert c.stdout is caller_stdout
    assert c.stderr is caller_stderr
    assert caller_stdout.getvalue() == stdout_text
    assert caller_stderr.getvalue() == stderr_text

    with captured() as outer_c:
        inner_c = print_captured(None, None)
    assert inner_c.stdout is None
    assert inner_c.stderr is None
    assert outer_c.stdout == stdout_text
    assert outer_c.stderr == stderr_text


def test_attach_stderr_handler():
    name = 'abbacadabba'
    logr = getLogger(name)
    assert len(logr.handlers) == 0
    assert logr.level is NOTSET

    debug_message = "debug message 1329-485"

    with captured() as c:
        attach_stderr_handler(WARN, name)
        logr.warn('test message')
        logr.debug(debug_message)

    assert len(logr.handlers) == 1
    assert logr.handlers[0].name == 'stderr'
    assert logr.handlers[0].level is NOTSET
    assert logr.level is WARN
    assert c.stdout == ''
    assert 'test message' in c.stderr
    assert debug_message not in c.stderr

    # round two, with debug
    with captured() as c:
        attach_stderr_handler(DEBUG, name)
        logr.warn('test message')
        logr.debug(debug_message)
        logr.info('info message')

    assert len(logr.handlers) == 1
    assert logr.handlers[0].name == 'stderr'
    assert logr.handlers[0].level is NOTSET
    assert logr.level is DEBUG
    assert c.stdout == ''
    assert 'test message' in c.stderr
    assert debug_message in c.stderr


