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

# Copyright (c) 2014 - 2020 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the largefiles extension interface.
"""


import os

from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import QDialog

from E5Gui.E5Application import e5App

from ..HgExtension import HgExtension
from ..HgDialog import HgDialog


class Largefiles(HgExtension):
    """
    Class implementing the largefiles extension interface.
    """
    def __init__(self, vcs):
        """
        Constructor
        
        @param vcs reference to the Mercurial vcs object
        """
        super(Largefiles, self).__init__(vcs)
    
    def hgLfconvert(self, direction, projectFile):
        """
        Public slot to convert the repository format of the current project.
        
        @param direction direction of the conversion (string, one of
            'largefiles' or 'normal')
        @param projectFile file name of the current project file (string)
        """
        assert direction in ["largefiles", "normal"]
        
        projectDir = os.path.dirname(projectFile)
        
        # find the root of the repo
        repodir = projectDir
        while not os.path.isdir(os.path.join(repodir, self.vcs.adminDir)):
            repodir = os.path.dirname(repodir)
            if os.path.splitdrive(repodir)[1] == os.sep:
                return
        
        from .LfConvertDataDialog import LfConvertDataDialog
        dlg = LfConvertDataDialog(projectDir, direction)
        if dlg.exec_() == QDialog.Accepted:
            newName, minSize, patterns = dlg.getData()
            newProjectFile = os.path.join(
                newName, os.path.basename(projectFile))
            
            # step 1: convert the current project to new project
            args = self.vcs.initCommand("lfconvert")
            if direction == 'normal':
                args.append('--to-normal')
            else:
                args.append("--size")
                args.append(str(minSize))
            args.append(projectDir)
            args.append(newName)
            if direction == 'largefiles' and patterns:
                args.extend(patterns)
            
            dia = HgDialog(self.tr('Convert Project - Converting'), self.vcs)
            res = dia.startProcess(args, repodir)
            if res:
                dia.exec_()
                res = dia.normalExit() and os.path.isdir(
                    os.path.join(newName, self.vcs.adminDir))
            
            # step 2: create working directory contents
            if res:
                args = self.vcs.initCommand("update")
                args.append("--verbose")
                dia = HgDialog(self.tr('Convert Project - Extracting'),
                               self.vcs, useClient=False)
                res = dia.startProcess(args, newName)
                if res:
                    dia.exec_()
                    res = dia.normalExit() and os.path.isfile(newProjectFile)
            
            # step 3: close current project and open new one
            if res:
                if direction == 'largefiles':
                    self.vcs.hgEditConfig(newName, largefilesData={
                        "minsize": minSize, "pattern": patterns})
                else:
                    self.vcs.hgEditConfig(newName, withLargefiles=False)
                QTimer.singleShot(
                    0, lambda: e5App().getObject("Project").openProject(
                        newProjectFile))
    
    def hgAdd(self, names, mode):
        """
        Public method used to add a file to the Mercurial repository.
        
        @param names file name(s) to be added (string or list of string)
        @param mode add mode (string one of 'normal' or 'large')
        """
        args = self.vcs.initCommand("add")
        args.append("-v")
        if mode == "large":
            args.append("--large")
        else:
            args.append("--normal")
        
        if isinstance(names, list):
            dname = self.vcs.splitPathList(names)[0]
        else:
            dname = self.vcs.splitPath(names)[0]
        
        # find the root of the repo
        repodir = dname
        while not os.path.isdir(os.path.join(repodir, self.vcs.adminDir)):
            repodir = os.path.dirname(repodir)
            if os.path.splitdrive(repodir)[1] == os.sep:
                return
        
        if isinstance(names, list):
            self.vcs.addArguments(args, names)
        else:
            args.append(names)
        
        dia = HgDialog(
            self.tr('Adding files to the Mercurial repository'),
            self.vcs)
        res = dia.startProcess(args, repodir)
        if res:
            dia.exec_()
    
    def hgLfPull(self, projectDir, revisions=None):
        """
        Public method to pull missing large files into the local repository.
        
        @param projectDir directory name of the project (string)
        @param revisions list of revisions to pull (list of string)
        """
        # find the root of the repo
        repodir = projectDir
        while not os.path.isdir(os.path.join(repodir, self.vcs.adminDir)):
            repodir = os.path.dirname(repodir)
            if os.path.splitdrive(repodir)[1] == os.sep:
                return
        
        revs = []
        if revisions:
            revs = revisions
        else:
            from .LfRevisionsInputDialog import LfRevisionsInputDialog
            dlg = LfRevisionsInputDialog()
            if dlg.exec_() == QDialog.Accepted:
                revs = dlg.getRevisions()
        
        if revs:
            args = self.vcs.initCommand("lfpull")
            args.append("-v")
            for rev in revs:
                args.append("--rev")
                args.append(rev)
            
            dia = HgDialog(self.tr("Pulling large files"), self.vcs)
            res = dia.startProcess(args, repodir)
            if res:
                dia.exec_()
    
    def hgLfVerify(self, projectDir, mode):
        """
        Public method to verify large files integrity.
        
        @param projectDir directory name of the project (string)
        @param mode verify mode (string; one of 'large', 'lfa' or 'lfc')
        """
        # find the root of the repo
        repodir = projectDir
        while not os.path.isdir(os.path.join(repodir, self.vcs.adminDir)):
            repodir = os.path.dirname(repodir)
            if os.path.splitdrive(repodir)[1] == os.sep:
                return
        
        args = self.vcs.initCommand("verify")
        if mode == "large":
            args.append("--large")
        elif mode == "lfa":
            args.append("--lfa")
        elif mode == "lfc":
            args.append("--lfc")
        else:
            return
        
        dia = HgDialog(
            self.tr('Verifying the integrity of large files'),
            self.vcs)
        res = dia.startProcess(args, repodir)
        if res:
            dia.exec_()
