# -*- coding: utf-8 -*-

"""
***************************************************************************
    ScriptEdit.py
    ---------------------
    Date                 : April 2013
    Copyright            : (C) 2013 by Alexander Bruy
    Email                : alexander dot bruy at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Alexander Bruy'
__date__ = 'April 2013'
__copyright__ = '(C) 2013, Alexander Bruy'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os

from PyQt4.QtCore import Qt, QSettings
from PyQt4.QtGui import QFont, QColor, QShortcut, QKeySequence
from qgis.core import QgsApplication

from PyQt4.Qsci import QsciScintilla, QsciLexerPython, QsciAPIs

from processing.gui.LexerR import LexerR


class ScriptEdit(QsciScintilla):

    LEXER_PYTHON = 0
    LEXER_R = 1

    def __init__(self, parent=None):
        QsciScintilla.__init__(self, parent)

        self.lexer = None
        self.api = None
        self.lexerType = -1

        self.setCommonOptions()
        self.initShortcuts()

    def setCommonOptions(self):
        # Enable non-ASCII characters
        self.setUtf8(True)

        # Default font
        font = QFont()
        font.setFamily('Courier')
        font.setFixedPitch(True)
        font.setPointSize(20)
        self.setFont(font)
        self.setMarginsFont(font)

        self.initLexer()

        self.setBraceMatching(QsciScintilla.SloppyBraceMatch)

        self.setWrapMode(QsciScintilla.WrapWord)
        self.setWrapVisualFlags(QsciScintilla.WrapFlagByText,
                                QsciScintilla.WrapFlagNone, 4)

        self.setSelectionForegroundColor(QColor('#2e3436'))
        self.setSelectionBackgroundColor(QColor('#babdb6'))

        # Show line numbers
        self.setMarginWidth(1, '000')
        self.setMarginLineNumbers(1, True)
        self.setMarginsForegroundColor(QColor('#2e3436'))
        self.setMarginsBackgroundColor(QColor('#babdb6'))

        # Highlight current line
        self.setCaretLineVisible(True)
        self.setCaretLineBackgroundColor(QColor('#d3d7cf'))

        # Folding
        self.setFolding(QsciScintilla.BoxedTreeFoldStyle)
        self.setFoldMarginColors(QColor('#d3d7cf'), QColor('#d3d7cf'))

        # Mark column 80 with vertical line
        self.setEdgeMode(QsciScintilla.EdgeLine)
        self.setEdgeColumn(80)
        self.setEdgeColor(QColor('#eeeeec'))

        # Indentation
        self.setAutoIndent(True)
        self.setIndentationsUseTabs(False)
        self.setIndentationWidth(4)
        self.setTabIndents(True)
        self.setBackspaceUnindents(True)
        self.setTabWidth(4)

        # Autocomletion
        self.setAutoCompletionThreshold(2)
        self.setAutoCompletionSource(QsciScintilla.AcsAPIs)

        self.setFonts(10)

    def setFonts(self, size):

        # Load font from Python console settings
        settings = QSettings()
        fontName = settings.value('pythonConsole/fontfamilytext', 'Monospace')
        fontSize = int(settings.value('pythonConsole/fontsize', size))

        self.defaultFont = QFont(fontName)
        self.defaultFont.setFixedPitch(True)
        self.defaultFont.setPointSize(fontSize)
        self.defaultFont.setStyleHint(QFont.TypeWriter)
        self.defaultFont.setStretch(QFont.SemiCondensed)
        self.defaultFont.setLetterSpacing(QFont.PercentageSpacing, 87.0)
        self.defaultFont.setBold(False)

        self.boldFont = QFont(self.defaultFont)
        self.boldFont.setBold(True)

        self.italicFont = QFont(self.defaultFont)
        self.italicFont.setItalic(True)

        self.setFont(self.defaultFont)
        self.setMarginsFont(self.defaultFont)

    def initShortcuts(self):
        (ctrl, shift) = (self.SCMOD_CTRL << 16, self.SCMOD_SHIFT << 16)

        # Disable some shortcuts
        self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord('D') + ctrl)
        self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord('L') + ctrl)
        self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord('L') + ctrl
                           + shift)
        self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord('T') + ctrl)

        #self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord("Z") + ctrl)
        #self.SendScintilla(QsciScintilla.SCI_CLEARCMDKEY, ord("Y") + ctrl)

        # Use Ctrl+Space for autocompletion
        self.shortcutAutocomplete = QShortcut(QKeySequence(Qt.CTRL
                                                           + Qt.Key_Space), self)
        self.shortcutAutocomplete.setContext(Qt.WidgetShortcut)
        self.shortcutAutocomplete.activated.connect(self.autoComplete)

    def autoComplete(self):
        self.autoCompleteFromAll()

    def setLexerType(self, lexerType):
        self.lexerType = lexerType
        self.initLexer()

    def initLexer(self):
        if self.lexerType == self.LEXER_PYTHON:
            self.lexer = QsciLexerPython()

            colorDefault = QColor('#2e3436')
            colorComment = QColor('#c00')
            colorCommentBlock = QColor('#3465a4')
            colorNumber = QColor('#4e9a06')
            colorType = QColor('#4e9a06')
            colorKeyword = QColor('#204a87')
            colorString = QColor('#ce5c00')

            self.lexer.setDefaultFont(self.defaultFont)
            self.lexer.setDefaultColor(colorDefault)

            self.lexer.setColor(colorComment, 1)
            self.lexer.setColor(colorNumber, 2)
            self.lexer.setColor(colorString, 3)
            self.lexer.setColor(colorString, 4)
            self.lexer.setColor(colorKeyword, 5)
            self.lexer.setColor(colorString, 6)
            self.lexer.setColor(colorString, 7)
            self.lexer.setColor(colorType, 8)
            self.lexer.setColor(colorCommentBlock, 12)
            self.lexer.setColor(colorString, 15)

            self.lexer.setFont(self.italicFont, 1)
            self.lexer.setFont(self.boldFont, 5)
            self.lexer.setFont(self.boldFont, 8)
            self.lexer.setFont(self.italicFont, 12)

            self.api = QsciAPIs(self.lexer)

            settings = QSettings()
            useDefaultAPI = bool(settings.value('pythonConsole/preloadAPI',
                                 True))
            if useDefaultAPI:
                # Load QGIS API shipped with Python console
                self.api.loadPrepared(
                    os.path.join(QgsApplication.pkgDataPath(),
                                 'python', 'qsci_apis', 'pyqgis.pap'))
            else:
                # Load user-defined API files
                apiPaths = settings.value('pythonConsole/userAPI', [])
                for path in apiPaths:
                    self.api.load(path)
                self.api.prepare()
                self.lexer.setAPIs(self.api)
        elif self.lexerType == self.LEXER_R:
            # R lexer
            self.lexer = LexerR()

        self.setLexer(self.lexer)
