# hginit.py - TortoiseHg dialog to initialize a repo
#
# Copyright 2008 Steve Borho <steve@borho.org>
# Copyright 2010 Johan Samyn <johan.samyn@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.

import os

from mercurial import hg, ui, error, util

from tortoisehg.hgqt.i18n import _
from tortoisehg.hgqt import qtlib
from tortoisehg.util import hglib, shlib

from PyQt4.QtCore import *
from PyQt4.QtGui import *

class InitDialog(QDialog):
    """TortoiseHg init dialog"""

    def __init__(self, destdir=[], opts={}, parent=None):
        super(InitDialog, self).__init__(parent)

        # main layout
        self.vbox = QVBoxLayout()
        self.vbox.setSpacing(6)
        self.grid = QGridLayout()
        self.grid.setSpacing(6)
        self.vbox.addLayout(self.grid)

        # dest widgets
        self.dest_lbl = QLabel(_('Destination path:'))
        self.dest_edit = QLineEdit()
        self.dest_edit.setMinimumWidth(300)
        self.dest_btn = QPushButton(_('Browse...'))
        self.dest_btn.setAutoDefault(False)
        self.grid.addWidget(self.dest_lbl, 0, 0)
        self.grid.addWidget(self.dest_edit, 0, 1)
        self.grid.addWidget(self.dest_btn, 0, 2)

        # options checkboxes
        self.add_files_chk = QCheckBox(
                _('Add special files (.hgignore, ...)'))
        self.make_pre_1_7_chk = QCheckBox(
                _('Make repo compatible with Mercurial <1.7'))
        self.run_wb_chk = QCheckBox(
                _('Show in Workbench after init'))
        self.grid.addWidget(self.add_files_chk, 1, 1)
        self.grid.addWidget(self.make_pre_1_7_chk, 2, 1)
        if not self.parent():
            self.grid.addWidget(self.run_wb_chk, 3, 1)

        # buttons
        self.init_btn = QPushButton(_('Create'))
        self.init_btn.setDefault(True)
        self.close_btn = QPushButton(_('&Close'))
        self.close_btn.setAutoDefault(False)
        self.hbox = QHBoxLayout()
        self.hbox.addStretch(0)
        self.hbox.addWidget(self.init_btn)
        self.hbox.addWidget(self.close_btn)
        self.vbox.addLayout(self.hbox)

        # some extras
        self.hgcmd_lbl = QLabel(_('Hg command:'))
        self.hgcmd_lbl.setAlignment(Qt.AlignRight)
        self.hgcmd_txt = QLineEdit()
        self.hgcmd_txt.setReadOnly(True)
        self.grid.addWidget(self.hgcmd_lbl, 4, 0)
        self.grid.addWidget(self.hgcmd_txt, 4, 1)

        # init defaults
        self.cwd = os.getcwd()
        path = os.path.abspath(destdir and destdir[0] or self.cwd)
        if os.path.isfile(path):
            path = os.path.dirname(path)
        self.dest_edit.setText(hglib.tounicode(path))
        self.add_files_chk.setChecked(True)
        self.make_pre_1_7_chk.setChecked(False)
        self.compose_command()

        # dialog settings
        self.setWindowTitle(_('New Repository'))
        self.setWindowIcon(qtlib.geticon('hg-init'))
        self.setWindowFlags(
                self.windowFlags() & ~Qt.WindowContextHelpButtonHint)
        self.setLayout(self.vbox)
        self.layout().setSizeConstraint(QLayout.SetFixedSize)
        self.dest_edit.setFocus()

        # connecting slots
        self.dest_edit.textChanged.connect(self.compose_command)
        self.dest_btn.clicked.connect(self.browse_clicked)
        self.init_btn.clicked.connect(self.init)
        self.close_btn.clicked.connect(self.close)
        self.make_pre_1_7_chk.toggled.connect(self.compose_command)

    def browse_clicked(self):
        """Select the destination directory"""
        dest = hglib.fromunicode(self.dest_edit.text())
        if not os.path.exists(dest):
            dest = os.path.dirname(dest)
        FD = QFileDialog
        caption = _('Select Destination Folder')
        path = FD.getExistingDirectory(parent=self, caption=caption,
                options=FD.ShowDirsOnly | FD.ReadOnly)
        if path:
            self.dest_edit.setText(path)

    def compose_command(self):
        # just a stub for extension with extra options (--mq, --ssh, ...)
        cmd = ['hg', 'init']
        if self.make_pre_1_7_chk.isChecked():
            cmd.append('--config format.dotencode=False')
        cmd.append(self.getPath())
        self.hgcmd_txt.setText(hglib.tounicode(' '.join(cmd)))

    def getPath(self):
        return hglib.fromunicode(self.dest_edit.text()).strip()

    def init(self):
        dest = self.getPath()

        if dest == '':
            qtlib.ErrorMsgBox(_('Error executing init'),
                    _('Destination path is empty'),
                    _('Please enter the directory path'))
            self.dest_edit.setFocus()
            return False

        dest = os.path.normpath(dest)
        self.dest_edit.setText(hglib.tounicode(dest))
        udest = self.dest_edit.text()

        if not os.path.exists(dest):
            p = dest
            l = 0
            while not os.path.exists(p):
                l += 1
                p, t = os.path.split(p)
                if not t:
                    break  # already root path
            if l > 1:
                res = qtlib.QuestionMsgBox(_('Init'),
                        _('Are you sure about adding the new repository '
                          '%d extra levels deep?') % l,
                        _('Path exists up to:\n%s\nand you asked for:\n%s')
                            % (p, udest),
                        defaultbutton=QMessageBox.No)
                if not res:
                    self.dest_edit.setFocus()
                    return
            try:
                # create the folder, just like Hg would
                os.makedirs(dest)
            except:
                qtlib.ErrorMsgBox(_('Error executing init'),
                        _('Cannot create folder %s') % udest)
                return False

        _ui = ui.ui()

        # dotencode is the new default repo format in Mercurial 1.7
        if self.make_pre_1_7_chk.isChecked():
            _ui.setconfig('format', 'dotencode', 'False')

        try:
            # create the new repo
            hg.repository(_ui, dest, create=1)
        except error.RepoError, inst:
            qtlib.ErrorMsgBox(_('Error executing init'),
                    _('Unable to create new repository'),
                    hglib.tounicode(str(inst)))
            return False
        except util.Abort, e:
            if e.hint:
                err = _('%s (hint: %s)') % (hglib.tounicode(str(e)),
                                            hglib.tounicode(e.hint))
            else:
                err = hglib.tounicode(str(e))
            qtlib.ErrorMsgBox(_('Error executing init'),
                    _('Error when creating repository'), err)
            return False
        except:
            import traceback
            qtlib.ErrorMsgBox(_('Error executing init'),
                    _('Error when creating repository'),
                    traceback.format_exc())
            return False

        # Create the .hg* file, mainly to workaround
        # Explorer's problem in creating files with a name
        # beginning with a dot.
        if (self.add_files_chk.isChecked() and
                os.path.exists(os.path.sep.join([dest, '.hg']))):
            hgignore = os.path.join(dest, '.hgignore')
            if not os.path.exists(hgignore):
                try:
                    open(hgignore, 'wb')
                except:
                    pass

        if self.run_wb_chk.isChecked():
            # TODO: implement by using signal-slot if possible
            from tortoisehg.hgqt import run
            run.qtrun.showRepoInWorkbench(udest)
        else:
            if not self.parent():
                qtlib.InfoMsgBox(_('Init'),
                _('<p>Repository successfully created at</p><p>%s</p>') % udest)

        self.accept()

    def reject(self):
        super(InitDialog, self).reject()
