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 CB_AddHeadFiles(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)
        Unit = SubElement(elem, 'Unit')
        Unit.set('filename', path.decode(fs_encoding))

def CB_AddCFiles(ProjectFiles, parent, gname, files, project_path):
    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)

        Unit = SubElement(parent, 'Unit')
        Unit.set('filename', path.decode(fs_encoding))
        Option = SubElement(Unit, 'Option')
        Option.set('compilerVar', "CC")

def CBProject(target, script, program):
    project_path = os.path.dirname(os.path.abspath(target))

    if os.path.isfile('template.cbp'):
        tree = etree.parse('template.cbp')
    else:
        tree = etree.parse(os.path.join(os.path.dirname(__file__), 'template.cbp'))
    
    root = tree.getroot()
    
    out = file(target, 'wb')
    out.write('<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>\n')
    
    ProjectFiles = []
    
    # SECTION 1. add "*.c|*.h" files group
    for elem in tree.iter(tag='Project'):
        # print elem.tag, elem.attrib
        break
    # add c files
    for group in script:
        group_xml = CB_AddCFiles(ProjectFiles, elem, group['name'], group['src'], project_path)
    # add h files
    CB_AddHeadFiles(program, elem, project_path)

    # SECTION 2. 
    # 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()
        # write include path, definitions
        for elem in tree.iter(tag='Compiler'):
            break
        for path in paths:
            Add = SubElement(elem, 'Add')
            Add.set('directory', path)

        for macro in building.Env.get('CPPDEFINES', []):
            Add = SubElement(elem, 'Add')
            Add.set('option', "-D"+macro)
        
        # 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()