# -*- coding: utf-8 -*-
"""novelWriter Spell Check Class Tester
"""

import os
import sys
import pytest

from dummy import causeOSError
from tools import readFile, writeFile

from nw.core.spellcheck import NWSpellCheck, NWSpellEnchant, NWSpellSimple
from nw.constants import nwConst

@pytest.mark.core
def testCoreSpell_Super(monkeypatch, tmpDir, tmpConf):
    """Test the spell checker super class
    """
    wList = os.path.join(tmpDir, "wordlist.txt")
    writeFile(wList, "a_word\nb_word\nc_word\n")

    spChk = NWSpellCheck()
    spChk.mainConf = tmpConf

    # Check that dummy functions return results that reflects that spell
    # checking is effectively disabled
    assert spChk.setLanguage("", "") is None
    assert spChk.checkWord("")
    assert spChk.suggestWords("") == []
    assert spChk.listDictionaries() == []
    assert spChk.describeDict() == ("", "")

    # Check language info
    assert NWSpellCheck.expandLanguage("en") == "English"
    assert NWSpellCheck.expandLanguage("en_GB") == "English (GB)"

    # Add a word to the user's dictionary
    assert spChk._readProjectDictionary("dummy") is False
    monkeypatch.setattr("builtins.open", causeOSError)
    assert spChk._readProjectDictionary(wList) is False
    monkeypatch.undo()
    assert spChk._readProjectDictionary(wList) is True
    assert spChk.projectDict == wList

    # Cannot write to file
    monkeypatch.setattr("builtins.open", causeOSError)
    assert spChk.addWord("d_word") is False
    monkeypatch.undo()
    assert readFile(wList) == "a_word\nb_word\nc_word\n"

    # First time, OK
    assert spChk.addWord("d_word") is True
    assert readFile(wList) == "a_word\nb_word\nc_word\nd_word\n"

    # But not added twice
    assert spChk.addWord("d_word") is False
    assert readFile(wList) == "a_word\nb_word\nc_word\nd_word\n"

# END Test testCoreSpell_Super

@pytest.mark.core
def testCoreSpell_Enchant(monkeypatch, tmpDir, tmpConf):
    """Test the pyenchant spell checker
    """
    wList = os.path.join(tmpDir, "wordlist.txt")
    writeFile(wList, "a_word\nb_word\nc_word\n")

    # Block the enchant package (and trigger the dummy class)
    monkeypatch.setitem(sys.modules, "enchant", None)
    spChk = NWSpellEnchant()

    spChk.setLanguage("en", wList)
    assert spChk.setLanguage("", "") is None
    assert spChk.checkWord("")
    assert spChk.suggestWords("") == []
    assert spChk.listDictionaries() == []
    assert spChk.describeDict() == ("", "")

    monkeypatch.undo()

    # Load the proper enchant package
    spChk = NWSpellEnchant()
    spChk.mainConf = tmpConf
    spChk.setLanguage("en", wList)

    assert spChk.checkWord("a_word")
    assert spChk.checkWord("b_word")
    assert spChk.checkWord("c_word")
    assert not spChk.checkWord("d_word")

    spChk.addWord("d_word")
    assert spChk.checkWord("d_word")

    wSuggest = spChk.suggestWords("wrod")
    assert len(wSuggest) > 0
    assert "word" in wSuggest

    dList = spChk.listDictionaries()
    assert len(dList) > 0

    aTag, aName = spChk.describeDict()
    assert aTag == "en"
    assert aName != ""

# END Test testCoreSpell_Enchant

@pytest.mark.core
def testCoreSpell_Simple(monkeypatch, tmpDir, tmpConf):
    """Test the fallback simple spell checker
    """
    wList = os.path.join(tmpDir, "wordlist.txt")
    wDict = os.path.join(tmpDir, "en.dict")
    writeFile(wList, "a_word\nb_word\nc_word\n")
    writeFile(wDict, "# Comment\ne_word\nf_word\ng_word\n")

    spChk = NWSpellSimple()
    spChk.mainConf = tmpConf
    spChk.mainConf.dictPath = tmpDir

    # Load dictionary, but fail
    monkeypatch.setattr("builtins.open", causeOSError)
    spChk.setLanguage("en", wList)
    assert spChk.spellLanguage is None
    assert spChk.WORDS == spChk.projDict
    monkeypatch.undo()

    # Load dictionary properly
    spChk.setLanguage("en", wList)
    assert spChk.projDict == ["a_word", "b_word", "c_word"]
    assert spChk.WORDS == ["e_word", "f_word", "g_word", "a_word", "b_word", "c_word"]

    # Check words
    assert spChk.checkWord("a_word")
    assert spChk.checkWord("b_word")
    assert spChk.checkWord("c_word")
    assert not spChk.checkWord("d_word")
    assert spChk.checkWord("e_word")
    assert spChk.checkWord("f_word")
    assert spChk.checkWord("g_word")

    # Add word
    spChk.addWord("d_word")
    assert spChk.checkWord("d_word")

    # Check spelling
    assert spChk.suggestWords(" \t") == []

    wSuggest = spChk.suggestWords("d_wrod")
    assert len(wSuggest) > 0
    assert "d_word" in wSuggest

    # Break the matching
    monkeypatch.setattr("difflib.get_close_matches", lambda *args, **kwargs: [""])
    assert spChk.suggestWords("word") == []
    monkeypatch.undo()

    # Capitalisation
    wSuggest = spChk.suggestWords("D_wrod")
    assert len(wSuggest) > 0
    assert "D_word" in wSuggest

    # List dictionaries
    assert spChk.listDictionaries() == [("en", "English [%s]" % nwConst.SP_INTERNAL)]

    # Description
    aTag, aName = spChk.describeDict()
    assert aTag == "en"
    assert aName == nwConst.SP_INTERNAL

# END Test testCoreSpell_Simple