import os
import re
import string
import fnmatch

from scriptCommon import catchPath

versionParser = re.compile( r'(\s*static\sVersion\sversion)\s*\(\s*(.*)\s*,\s*(.*)\s*,\s*(.*)\s*,\s*\"(.*)\"\s*,\s*(.*)\s*\).*' )
rootPath = os.path.join( catchPath, 'src/catch2' )
versionPath = os.path.join( rootPath, "catch_version.cpp" )
definePath = os.path.join(rootPath, 'catch_version_macros.hpp')
readmePath = os.path.join( catchPath, "README.md" )
cmakePath = os.path.join(catchPath, 'CMakeLists.txt')
mesonPath = os.path.join(catchPath, 'meson.build')

class Version:
    def __init__(self):
        f = open( versionPath, 'r' )
        for line in f:
            m = versionParser.match( line )
            if m:
                self.variableDecl = m.group(1)
                self.majorVersion = int(m.group(2))
                self.minorVersion = int(m.group(3))
                self.patchNumber = int(m.group(4))
                self.branchName = m.group(5)
                self.buildNumber = int(m.group(6))
        f.close()

    def nonDevelopRelease(self):
        if self.branchName != "":
            self.branchName = ""
            self.buildNumber = 0
    def developBuild(self):
        if self.branchName == "":
            self.branchName = "develop"
            self.buildNumber = 0

    def incrementBuildNumber(self):
        self.developBuild()
        self.buildNumber = self.buildNumber+1

    def incrementPatchNumber(self):
        self.nonDevelopRelease()
        self.patchNumber = self.patchNumber+1

    def incrementMinorVersion(self):
        self.nonDevelopRelease()
        self.patchNumber = 0
        self.minorVersion = self.minorVersion+1

    def incrementMajorVersion(self):
        self.nonDevelopRelease()
        self.patchNumber = 0
        self.minorVersion = 0
        self.majorVersion = self.majorVersion+1

    def getVersionString(self):
        versionString = '{0}.{1}.{2}'.format( self.majorVersion, self.minorVersion, self.patchNumber )
        if self.branchName != "":
            versionString = versionString + '-{0}.{1}'.format( self.branchName, self.buildNumber )
        return versionString

    def updateVersionFile(self):
        f = open( versionPath, 'r' )
        lines = []
        for line in f:
            m = versionParser.match( line )
            if m:
                lines.append( '{0}( {1}, {2}, {3}, "{4}", {5} );'.format( self.variableDecl, self.majorVersion, self.minorVersion, self.patchNumber, self.branchName, self.buildNumber ) )
            else:
                lines.append( line.rstrip() )
        f.close()
        f = open( versionPath, 'w' )
        for line in lines:
            f.write( line + "\n" )


def updateCmakeFile(version):
    with open(cmakePath, 'rb') as file:
        lines = file.readlines()
    replacementRegex = re.compile(b'''VERSION (\\d+.\\d+.\\d+) # CML version placeholder, don't delete''')
    replacement = '''VERSION {0} # CML version placeholder, don't delete'''.format(version.getVersionString()).encode('ascii')
    with open(cmakePath, 'wb') as file:
        for line in lines:
            file.write(replacementRegex.sub(replacement, line))


def updateMesonFile(version):
    with open(mesonPath, 'rb') as file:
        lines = file.readlines()
    replacementRegex = re.compile(b'''version\s*:\s*'(\\d+.\\d+.\\d+)', # CML version placeholder, don't delete''')
    replacement = '''version: '{0}', # CML version placeholder, don't delete'''.format(version.getVersionString()).encode('ascii')
    with open(mesonPath, 'wb') as file:
        for line in lines:
            file.write(replacementRegex.sub(replacement, line))


def updateVersionDefine(version):
    # First member of the tuple is the compiled regex object, the second is replacement if it matches
    replacementRegexes = [(re.compile(b'#define CATCH_VERSION_MAJOR \\d+'),'#define CATCH_VERSION_MAJOR {}'.format(version.majorVersion).encode('ascii')),
                          (re.compile(b'#define CATCH_VERSION_MINOR \\d+'),'#define CATCH_VERSION_MINOR {}'.format(version.minorVersion).encode('ascii')),
                          (re.compile(b'#define CATCH_VERSION_PATCH \\d+'),'#define CATCH_VERSION_PATCH {}'.format(version.patchNumber).encode('ascii')),
                         ]
    with open(definePath, 'rb') as file:
        lines = file.readlines()
    with open(definePath, 'wb') as file:
        for line in lines:
            for replacement in replacementRegexes:
                line = replacement[0].sub(replacement[1], line)
            file.write(line)


def updateVersionPlaceholder(filename, version):
    with open(filename, 'rb') as file:
        lines = file.readlines()
    placeholderRegex = re.compile(b'Catch[0-9]? X.Y.Z')
    replacement = 'Catch2 {}.{}.{}'.format(version.majorVersion, version.minorVersion, version.patchNumber).encode('ascii')
    with open(filename, 'wb') as file:
        for line in lines:
            file.write(placeholderRegex.sub(replacement, line))


def updateDocumentationVersionPlaceholders(version):
    print('Updating version placeholder in documentation')
    docsPath = os.path.join(catchPath, 'docs/')
    for basePath, _, files in os.walk(docsPath):
        for file in files:
            if fnmatch.fnmatch(file, "*.md") and "contributing.md" != file:
                updateVersionPlaceholder(os.path.join(basePath, file), version)


def performUpdates(version):
    version.updateVersionFile()
    updateVersionDefine(version)

    import generateAmalgamatedFiles
    generateAmalgamatedFiles.generate_header()
    generateAmalgamatedFiles.generate_cpp()

    updateCmakeFile(version)
    updateMesonFile(version)
    updateDocumentationVersionPlaceholders(version)
