# -*- coding: utf-8 -*-
"""Tests the xonsh history."""
# pylint: disable=protected-access
import os
import shlex

from xonsh.history.sqlite import SqliteHistory
from xonsh.history.main import history_main

import pytest


@pytest.yield_fixture
def hist():
    h = SqliteHistory(filename='xonsh-HISTORY-TEST.sqlite',
                      sessionid='SESSIONID', gc=False)
    yield h
    os.remove(h.filename)


def test_hist_append(hist, xonsh_builtins):
    """Verify appending to the history works."""
    xonsh_builtins.__xonsh_env__['HISTCONTROL'] = set()
    hf = hist.append({'inp': 'still alive', 'rtn': 1})
    assert hf is None
    items = list(hist.items())
    assert len(items) == 1
    assert 'still alive' == items[0]['inp']
    assert 1 == items[0]['rtn']
    hist.append({'inp': 'still alive', 'rtn': 0})
    items = list(hist.items())
    assert len(items) == 2
    assert 'still alive' == items[1]['inp']
    assert 0 == items[1]['rtn']
    assert list(hist.all_items()) == items


def test_hist_attrs(hist, xonsh_builtins):
    xonsh_builtins.__xonsh_env__['HISTCONTROL'] = set()
    hf = hist.append({'inp': 'ls foo', 'rtn': 1})
    assert hf is None
    assert 'ls foo' == hist.inps[0]
    assert 'ls foo' == hist.inps[-1]
    assert 1 == hist.rtns[0]
    assert 1 == hist.rtns[-1]
    assert None is hist.outs[-1]
    assert [1] == hist.rtns[:]
    hist.append({'inp': 'ls bar', 'rtn': 0})
    assert 'ls bar' == hist.inps[1]
    assert 'ls bar' == hist.inps[-1]
    assert 0 == hist.rtns[1]
    assert 0 == hist.rtns[-1]
    assert None is hist.outs[-1]
    assert [1, 0] == hist.rtns[:]
    assert len(hist.tss) == 2
    assert len(hist.tss[0]) == 2


CMDS = ['ls', 'cat hello kitty', 'abc', 'def', 'touch me', 'grep from me']


@pytest.mark.parametrize('inp, commands, offset', [
    ('', CMDS, (0, 1)),
    ('-r', list(reversed(CMDS)), (len(CMDS) - 1, -1)),
    ('0', CMDS[0:1], (0, 1)),
    ('1', CMDS[1:2], (1, 1)),
    ('-2', CMDS[-2:-1], (len(CMDS) - 2, 1)),
    ('1:3', CMDS[1:3], (1, 1)),
    ('1::2', CMDS[1::2], (1, 2)),
    ('-4:-2', CMDS[-4:-2], (len(CMDS) - 4, 1))
    ])
def test_show_cmd_numerate(inp, commands, offset, hist, xonsh_builtins, capsys):
    """Verify that CLI history commands work."""
    base_idx, step = offset
    xonsh_builtins.__xonsh_history__ = hist
    xonsh_builtins.__xonsh_env__['HISTCONTROL'] = set()
    for ts, cmd in enumerate(CMDS):  # populate the shell history
        hist.append({'inp': cmd, 'rtn': 0, 'ts': (ts + 1, ts + 1.5)})

    exp = ('{}: {}'.format(base_idx + idx * step, cmd)
           for idx, cmd in enumerate(list(commands)))
    exp = '\n'.join(exp)

    history_main(['show', '-n'] + shlex.split(inp))
    out, err = capsys.readouterr()
    assert out.rstrip() == exp


def test_histcontrol(hist, xonsh_builtins):
    """Test HISTCONTROL=ignoredups,ignoreerr"""

    xonsh_builtins.__xonsh_env__['HISTCONTROL'] = 'ignoredups,ignoreerr'
    assert len(hist) == 0

    # An error, items() remains empty
    hist.append({'inp': 'ls foo', 'rtn': 2})
    assert len(hist) == 0
    assert len(hist.inps) == 1
    assert len(hist.rtns) == 1
    assert 2 == hist.rtns[-1]

    # Success
    hist.append({'inp': 'ls foobazz', 'rtn': 0})
    assert len(hist) == 1
    assert len(hist.inps) == 2
    assert len(hist.rtns) == 2
    items = list(hist.items())
    assert 'ls foobazz' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 0 == hist.rtns[-1]

    # Error
    hist.append({'inp': 'ls foo', 'rtn': 2})
    assert len(hist) == 1
    items = list(hist.items())
    assert 'ls foobazz' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 2 == hist.rtns[-1]

    # File now exists, success
    hist.append({'inp': 'ls foo', 'rtn': 0})
    assert len(hist) == 2
    items = list(hist.items())
    assert 'ls foo' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 0 == hist.rtns[-1]

    # Success
    hist.append({'inp': 'ls', 'rtn': 0})
    assert len(hist) == 3
    items = list(hist.items())
    assert 'ls' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 0 == hist.rtns[-1]

    # Dup
    hist.append({'inp': 'ls', 'rtn': 0})
    assert len(hist) == 3

    # Success
    hist.append({'inp': '/bin/ls', 'rtn': 0})
    assert len(hist) == 4
    items = list(hist.items())
    assert '/bin/ls' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 0 == hist.rtns[-1]

    # Error
    hist.append({'inp': 'ls bazz', 'rtn': 1})
    assert len(hist) == 4
    items = list(hist.items())
    assert '/bin/ls' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert 'ls bazz' == hist.inps[-1]
    assert 1 == hist.rtns[-1]

    # Error
    hist.append({'inp': 'ls bazz', 'rtn': -1})
    assert len(hist) == 4
    items = list(hist.items())
    assert '/bin/ls' == items[-1]['inp']
    assert 0 == items[-1]['rtn']
    assert -1 == hist.rtns[-1]


@pytest.mark.parametrize('index, exp', [
    (-1, 'grep from me'),
    ('hello', 'cat hello kitty'),
    ((-1, -1), 'me'),
    (('hello', 0), 'cat'),
    ((-1, slice(0, 2)), 'grep from'),
    (('kitty', slice(1, 3)), 'hello kitty')
])
def test_history_getitem(index, exp, hist, xonsh_builtins):
    xonsh_builtins.__xonsh_env__['HISTCONTROL'] = set()
    for ts, cmd in enumerate(CMDS):  # populate the shell history
        hist.append({'inp': cmd, 'rtn': 0, 'ts': (ts + 1, ts + 1.5)})
    assert hist[index] == exp