import os, os.path, sys
import urllib, zipfile
import shutil, glob, fnmatch
import subprocess, logging, re
import csv, shutil
import pprint

forge_dir = os.path.dirname(os.path.abspath(__file__))
mcp_dir = os.path.abspath('..')
src_dir = os.path.join(mcp_dir, 'src')
sys.path.append(mcp_dir)
        
def reset_logger():
    log = logging.getLogger()
    while len(log.handlers) > 0:
        log.removeHandler(log.handlers[0])
    
version_reg = re.compile(r'(([a-z]+)Version[\s]+=[\s]+)(\d+);')       
def load_version(build=0):
    info = {'major'    : -1,
            'minor'    : -1,
            'revision' : -1,
            'build'    : -1
           }
    hook_file = os.path.join(forge_dir, 'common/net/minecraftforge/common/ForgeVersion.java'.replace('/', os.sep))
    with open(hook_file, 'r') as fh:
        buf = fh.read() 
        
    def proc(match):
        try:
            info[match.group(2)] = int(match.group(3))
        except:
            pass
        return match.group(0)
        
    buf = version_reg.sub(proc, buf)
    info['build'] = build
    return info

def inject_version(src_file, build=0):
    version = load_version(build) 

    tmp_file = src_file + '.tmp'
    with open(src_file, 'r') as fh:
        buf = fh.read()            
    
    def mapname(match):
        try:
            return '%s%s;' % (match.group(1), version[match.group(2)])
        except KeyError:
            pass
        return match.group(0)
        
    buf = version_reg.sub(mapname, buf).replace('\r\n', '\n')
    
    with open(tmp_file, 'wb') as fh:
        fh.write(buf)
    shutil.move(tmp_file, src_file)
    
def zip_folder(path, key, zip):
    files = os.listdir(path)
    for file in files:
        file_path = os.path.join(path, file)
        file_key  = os.path.join(key, file)
        if os.path.isdir(file_path):
            zip_folder(file_path, file_key, zip)
        else:
            print file_key
            zip.write(file_path, file_key)
            
def zip_create(path, key, zip_name):
    zip = zipfile.ZipFile(zip_name, 'w', zipfile.ZIP_DEFLATED)
    if os.path.isdir(path):
        zip_folder(path, key, zip)
    else:
        zip.write(path, key)
    zip.close()

def apply_forge_patches(fml_dir, mcp_dir, forge_dir, src_dir, copy_files=True):
    sys.path.append(fml_dir)
    from fml import copytree, apply_patches
    
    has_client = os.path.isdir(os.path.join(src_dir, 'minecraft'))
    has_server = os.path.isdir(os.path.join(src_dir, 'minecraft_server'))
    
    #patch files
    print 'Applying Minecraft Forge patches'
    sys.stdout.flush()
    if has_client:
        if os.path.isdir(os.path.join(forge_dir, 'patches', 'minecraft')):
            apply_patches(mcp_dir, os.path.join(forge_dir, 'patches', 'minecraft'), src_dir)
        if copy_files and os.path.isdir(os.path.join(forge_dir, 'client')):
            copytree(os.path.join(forge_dir, 'client'), os.path.join(src_dir, 'minecraft'))
        
    if has_server:
        if os.path.isdir(os.path.join(forge_dir, 'patches', 'minecraft_server')):
            apply_patches(mcp_dir, os.path.join(forge_dir, 'patches', 'minecraft_server'), src_dir)
        if copy_files and os.path.isdir(os.path.join(forge_dir, 'server')):
            copytree(os.path.join(forge_dir, 'server'), os.path.join(src_dir, 'minecraft_server'))
            
    if os.path.isdir(os.path.join(forge_dir, 'patches', 'common')):
        apply_patches(mcp_dir, os.path.join(forge_dir, 'patches', 'common'), src_dir)
    if copy_files and os.path.isdir(os.path.join(forge_dir, 'common')):
        copytree(os.path.join(forge_dir, 'common'), os.path.join(src_dir, 'common'))

def get_conf_copy(mcp_dir, forge_dir):
    #Lets grab the files we dont work on
    for file in ['astyle.cfg', 'version.cfg', 'patches/minecraft_ff.patch', 'patches/minecraft_server_ff.patch', 'newids.csv']:
        dst_file = os.path.normpath(os.path.join(forge_dir, 'conf', file))
        src_file = os.path.normpath(os.path.join(mcp_dir, 'conf', file))
        if os.path.exists(dst_file):
            os.remove(dst_file)
        shutil.copy(src_file, dst_file)
        print 'Grabbing: ' + src_file

    common_srg = gen_merged_srg(mcp_dir, forge_dir)
    common_exc = gen_merged_exc(mcp_dir, forge_dir)
    common_map = gen_shared_searge_names(common_srg, common_exc)
    #ToDo use common_map to merge the remaining csvs, client taking precidense, setting the common items to side '2' and editing commands.py in FML to have 'if csv_side == side || csv_side == '2''
    gen_merged_csv(common_map, os.path.join(mcp_dir, 'conf', 'fields.csv'), os.path.join(forge_dir, 'conf', 'fields.csv'))
    gen_merged_csv(common_map, os.path.join(mcp_dir, 'conf', 'methods.csv'), os.path.join(forge_dir, 'conf', 'methods.csv'))
    gen_merged_csv(common_map, os.path.join(mcp_dir, 'conf', 'params.csv'), os.path.join(forge_dir, 'conf', 'params.csv'), main_key='param')
        
def gen_merged_srg(mcp_dir, forge_dir):
    print 'Generating merged Retroguard data'
    srg_client = os.path.join(mcp_dir, 'conf', 'client.srg')
    srg_server = os.path.join(mcp_dir, 'conf', 'server.srg')
    
    if not os.path.isfile(srg_client) or not os.path.isfile(srg_server):
        print 'Could not find client and server srg files in "%s"' % mcp_dir
        return False
        
    client = {'PK:': {}, 'CL:': {}, 'FD:': {}, 'MD:': {}}
    with open(srg_client, 'r') as fh:
        for line in fh:
            pts = line.rstrip('\r\n').split(' ')
            if pts[0] == 'MD:':
                client[pts[0]][pts[1] + ' ' + pts[2]] = pts[3] + ' ' + pts[4]
            else:
                client[pts[0]][pts[1]] = pts[2]
    
    server = {'PK:': {}, 'CL:': {}, 'FD:': {}, 'MD:': {}}
    with open(srg_server, 'r') as fh:
        for line in fh:
            pts = line.rstrip('\r\n').split(' ')
            if pts[0] == 'MD:':
                server[pts[0]][pts[1] + ' ' + pts[2]] = pts[3] + ' ' + pts[4]
            else:
                server[pts[0]][pts[1]] = pts[2]
    
    common = {'PK:': {}, 'CL:': {}, 'FD:': {}, 'MD:': {}}
    for type in common:
        for key, value in client[type].items():
            if key in server[type]:
                if value == server[type][key]:
                    client[type].pop(key)
                    server[type].pop(key)
                    common[type][key] = value

    for type in common:
        for key, value in client[type].items():
            common[type][key] = value #+ ' #C'
            
    for type in common:
        for key, value in server[type].items():
            common[type][key] = value #+ ' #S'
            
    #Print joined retroguard files
    with open(os.path.join(forge_dir, 'conf', 'joined.srg'), 'w') as f:
        for type in ['PK:', 'CL:', 'FD:', 'MD:']:
            for key in sorted(common[type]):
                f.write('%s %s %s\n' % (type, key, common[type][key]))
    
    return common

def gen_merged_exc(mcp_dir, forge_dir):
    print 'Generating merged MCInjector config'
    exc_client = os.path.join(mcp_dir, 'conf', 'client.exc')
    exc_server = os.path.join(mcp_dir, 'conf', 'server.exc')
    
    client = {}
    with open(exc_client, 'r') as fh:
        for line in fh:
            if not line.startswith('#'):
                pts = line.rstrip('\r\n').split('=')
                client[pts[0]] = pts[1]
            
    server = {}
    with open(exc_server, 'r') as fh:
        for line in fh:
            if not line.startswith('#'):
                pts = line.rstrip('\r\n').split('=')
                server[pts[0]] = pts[1]
    
    common = {}
    for key, value in client.items():
        if key in server:
            if value != server[key]:
                print 'Error: Exec for shared function does not match client and server:'
                print 'Function: ' + key
                print 'Client: ' + value
                print 'Server: ' + server[value]
            if value != '|':
                common[key] = value
            client.pop(key)
            server.pop(key)
        else:
            if value != '|':
                common[key] = value
    
    joined = dict(common.items() + server.items())
    
    #Print joined mcinjector files
    with open(os.path.join(forge_dir, 'conf', 'joined.exc'), 'w') as f:
        for key in sorted(joined):
            f.write('%s=%s\n' % (key, joined[key]))
            
    return common
            
def gen_shared_searge_names(common_srg, common_exc):
    field = re.compile(r'field_[0-9]+_[a-zA-Z_]+$')
    method = re.compile(r'func_[0-9]+_[a-zA-Z_]+')
    param = re.compile(r'p_[\w]+_\d+_')
    
    print 'Gathering list of common searge names'
    
    searge = []
    
    for key, value in common_srg['FD:'].items():
        m = field.search(value)
        if not m is None:
            if not m.group(0) in searge:
                searge.append(m.group(0))
                
    for key, value in common_srg['MD:'].items():
        m = method.search(value)
        if not m is None and not '#' in value:
            if not m.group(0) in searge:
                searge.append(m.group(0))
                
    for key, value in common_exc.items():
        m = param.findall(value)
        if not m is None:
            for p in m:
                if not p in searge:
                    searge.append(p)
                    
    return searge
        
def gen_merged_csv(common_map, in_file, out_file, main_key='searge'):
    reader = csv.DictReader(open(in_file, 'r'))
    print 'Generating merged csv for %s' % os.path.basename(in_file)
    sides = {'client': [], 'server': [], 'common': []}
    added = []
    for row in reader:
        side = int(row['side'])
        if row[main_key] in common_map:
            if not row[main_key] in added:
                row['side'] = '2'
                sides['common'].append(row)
                added.append(row[main_key])
        elif side == 0:
            sides['client'].append(row)
        else:
            sides['server'].append(row)
            
    writer = csv.DictWriter(open(out_file, 'wb'), fieldnames=reader.fieldnames)
    writer.writeheader()
    for key in ['client', 'server', 'common']:
        for row in sorted(sides[key], key=lambda row: row[main_key]):
            writer.writerow(row)
    
def setup_forge_mcp(mcp_dir, forge_dir, dont_gen_conf=True):
    mcp_conf = os.path.join(mcp_dir, 'conf')
    mcp_conf_bak = os.path.join(mcp_dir, 'conf.bak')
    forge_conf = os.path.join(forge_dir, 'conf')
    
    if os.path.isdir(mcp_conf_bak):
        print 'Removing old conf backup folder'
        shutil.rmtree(mcp_conf_bak)
    
    if not dont_gen_conf:
        get_conf_copy(mcp_dir, forge_dir)
    
    print 'Backing up MCP Conf'
    os.rename(mcp_conf, mcp_conf_bak)
    
    print 'Copying Forge conf'
    shutil.copytree(forge_conf, mcp_conf)
    
def build_forge_dev(mcp_dir, forge_dir, fml_dir, build_num=0):
    version = load_version(build_num)
    print '=================================== Build %d.%d.%d.%d Start =================================' % (version['major'], version['minor'], version['revision'], version['build'])
    
    src_dir = os.path.join(mcp_dir, 'src')
    if os.path.isdir(src_dir):
        shutil.rmtree(src_dir)
    
    sys.path.append(fml_dir)
    from fml import copytree
        
    print 'src_work -> src'
    copytree(os.path.join(mcp_dir, 'src_work'), src_dir)
    print '\nCopying Client Code'
    copytree(os.path.join(forge_dir, 'client'), os.path.join(src_dir, 'minecraft'), -1)
    print '\nCopying Server Code'
    copytree(os.path.join(forge_dir, 'server'), os.path.join(src_dir, 'minecraft_server'), -1)
    print '\nCopying Common Code'
    copytree(os.path.join(forge_dir, 'common'), os.path.join(src_dir, 'common'), -1)
    print
    inject_version(os.path.join(src_dir, 'common/net/minecraftforge/common/ForgeVersion.java'.replace('/', os.sep)), build_num)
    
    error_level = 0
    try:
        sys.path.append(mcp_dir)
        from runtime.recompile import recompile
        
        os.chdir(mcp_dir)
        reset_logger()
        recompile(None)
        reset_logger()
        os.chdir(forge_dir)
        
    except SystemExit, e:
        print 'Recompile Exception: %d ' % e.code
        error_level = e.code
        
    print '=================================== Build Finished %d =================================' % error_level
    return error_level