import os
import sys
import string
import building

import xml.etree.ElementTree as etree
from xml.etree.ElementTree import SubElement
from utils import _make_path_relative
from utils import xml_indent
fs_encoding = sys.getfilesystemencoding()

def VS_AddGroup(ProjectFiles, parent, name, files, project_path):
    Filter = SubElement(parent, 'Filter')
    Filter.set('Name', name) #set group name to group

    for f in files:
        fn = f.rfile()
        name = fn.name
        path = os.path.dirname(fn.abspath)

        path = _make_path_relative(project_path, path)
        path = os.path.join(path, name)

        File = SubElement(Filter, 'File')
        File.set('RelativePath', path.decode(fs_encoding))

def VS_AddHeadFilesGroup(program, elem, project_path):
    building.source_ext = []
    building.source_ext = ["h"]
    for item in program:
        building.walk_children(item)    
    building.source_list.sort()
    # print building.source_list
    
    for f in building.source_list:
        path = _make_path_relative(project_path, f)
        File = SubElement(elem, 'File')
        File.set('RelativePath', path.decode(fs_encoding))

def VSProject(target, script, program):
    project_path = os.path.dirname(os.path.abspath(target))
    
    tree = etree.parse('template.vcproj')
    root = tree.getroot()
    
    out = file(target, 'wb')
    out.write('<?xml version="1.0" encoding="UTF-8"?>\r\n')
    
    ProjectFiles = []
    
    # add "*.c" files group
    for elem in tree.iter(tag='Filter'):
        if elem.attrib['Name'] == 'Source Files':
            #print elem.tag, elem.attrib
            break

    for group in script:
        group_xml = VS_AddGroup(ProjectFiles, elem, group['name'], group['src'], project_path)

    # add "*.h" files group
    for elem in tree.iter(tag='Filter'):
        if elem.attrib['Name'] == 'Header Files':
            break
    VS_AddHeadFilesGroup(program, elem, project_path)
    
    # write head include path
    if building.Env.has_key('CPPPATH'):
        cpp_path = building.Env['CPPPATH']
        paths  = set()
        for path in cpp_path:
            inc = _make_path_relative(project_path, os.path.normpath(path))
            paths.add(inc) #.replace('\\', '/')
    
        paths = [i for i in paths]
        paths.sort()
        cpp_path = ';'.join(paths)

        # write include path, definitions
        for elem in tree.iter(tag='Tool'):
            if elem.attrib['Name'] == 'VCCLCompilerTool':
                #print elem.tag, elem.attrib
                break
        elem.set('AdditionalIncludeDirectories', cpp_path)

    # write cppdefinitons flags
    if building.Env.has_key('CPPDEFINES'):
        definitions = ';'.join(building.Env['CPPDEFINES'])
        elem.set('PreprocessorDefinitions', definitions)
    # write link flags

    # write lib dependence 
    if building.Env.has_key('LIBS'):
        for elem in tree.iter(tag='Tool'):
            if elem.attrib['Name'] == 'VCLinkerTool':
                break
        libs_with_extention = [i+'.lib' for i in building.Env['LIBS']]
        libs = ' '.join(libs_with_extention)
        elem.set('AdditionalDependencies', libs)

    # write lib include path
    if building.Env.has_key('LIBPATH'):
        lib_path = building.Env['LIBPATH']
        paths  = set()
        for path in lib_path:
            inc = _make_path_relative(project_path, os.path.normpath(path))
            paths.add(inc) #.replace('\\', '/')
    
        paths = [i for i in paths]
        paths.sort()
        lib_paths = ';'.join(paths)
        elem.set('AdditionalLibraryDirectories', lib_paths)

    xml_indent(root)
    out.write(etree.tostring(root, encoding='utf-8'))
    out.close()