import os, subprocess, re, tempfile
from subprocess import Popen, PIPE, STDOUT

import buffer, default, dirutil, lex, regex, util, window
from point import Point
import buffer.colors
from  method.vc import VcBlame, VcRevView

from method import Method, Argument, arg

if os.system('which svn >/dev/null 2>/dev/null') == 0:
    has_svn = True
else:
    has_svn = False

class SvnException(Exception):
    pass

statuses = {
    ' ': 'Unmodified',
    'A': 'Added',
    'C': 'Conflicted',
    'D': 'Deleted',
    'I': 'Ignored',
    'M': 'Modified',
    'R': 'Replaced',
    'X': 'External',
    '?': 'Unknown',
    '!': 'Missing',
    '~': 'Obstructed',
}

def get_status(path, base=None):
    if base is None: base = os.getcwd() + os.path.sep
    if path.startswith(base): path = path[len(base):]

    cmd = "svn status -v %r" % path
    status, data = subprocess.getstatusoutput(cmd)
    status = status >> 8

    if status != 0:
        raise SvnException("Problems with 'svn status': %d" % status)

    c = data[0]
    status = statuses.get(c, 'Error (%s)' % c)
    fields = data[6:].split()

    try:
        rrev, lrev, lauthor, filename = fields
    except:
        raise Exception('%r %r' % (fields, data[6:]))

    return {
        'svn-filename': filename,
        'svn-status':   status,
        'svn-lrev':     lrev,
        'svn-rrev':     rrev,
        'svn-author':   lauthor,
    }

class SvnCommit(Method):
    '''diff the current file with the version in SVN'''
    args = [Argument("msg", type=type(""), prompt="Commit Message: ")]
    regex = re.compile(r'^Committed revision ([0-9]+)\.$')
    def _execute(self, w, **vargs):
        if not hasattr(w.buffer, 'path'):
            w.set_error("Buffer has no corresponding file")
            return

        cwd = os.getcwd() + os.path.sep
        path = w.buffer.path
        if path.startswith(cwd):
            path = path[len(cwd):]

        cmd = "svn ci -m %r %r" % (vargs['msg'], path)
        (status, data) = subprocess.getstatusoutput(cmd)
        status = status >> 8
        lines = data.split('\n')

        if status == 0:
            try:
                for line in lines:
                    m = self.regex.match(line)
                    if m:
                        rev = m.group(1)
                        w.buffer.metadata['svn-lrev'] = rev
                        w.buffer.metadata['svn-rrev'] = rev
                        w.set_error("Committed [%s]" % rev)
                        return
            except:
                pass
        w.set_error("Problems with SVN commit: %d" % status)
        w.application.data_buffer("*Commit*", repr(lines), switch_to=True)
    
class SvnStatus(Method):
    column = {
        ' ': 'Unmodified',
        'A': 'Added',
        'C': 'Conflicted',
        'D': 'Deleted',
        'I': 'Ignored',
        'M': 'Modified',
        'R': 'Replaced',
        'X': 'External',
        '?': 'Unknown',
        '!': 'Missing',
        '~': 'Obstructed',
    }
    def _execute(self, w, **vargs):
        if not hasattr(w.buffer, 'path'):
            w.set_error("Buffer has no corresponding file")
            return

        cwd = os.getcwd() + os.path.sep
        path = w.buffer.path
        if path.startswith(cwd):
            path = path[len(cwd):]
        cmd = "svn status -v %r" % path
        (status, data) = subprocess.getstatusoutput(cmd)
        status = status >> 8

        if status != 0:
            w.set_error("Problems with 'svn status': %d" % status)
            return

        c = data[0]
        status = self.column.get(c, 'Error (%s)' % c)
        fields = data[6:].split()
        if len(fields) == 4:
            rrev, lrev, lauthor, filename = fields
            w.buffer.metadata['svn-filename'] = filename
            w.buffer.metadata['svn-status']   = status
            w.buffer.metadata['svn-lrev']     = lrev
            w.buffer.metadata['svn-rrev']     = rrev
            w.buffer.metadata['svn-author']   = lauthor
            w.buffer.metadata['vc-info']      = '[svn:%s/%s]' % (lrev, rrev)
            w.set_error('%s  %s  %s/%s  [%s]' % (filename, status, rrev, lrev, lauthor))
        else:
            w.buffer.metadata['svn-filename'] = path
            w.buffer.metadata['svn-status']   = status
            w.buffer.metadata['vc-info']      = '[svn:%s]' % status.lower()
            w.set_error('%s  %s' % (path, status))

class SvnLog(Method):
    '''display the SVN log for the current file'''
    sep_re = re.compile('^-+$')
    log_re = re.compile(r'^(.+?) \| (.+?) \| (.{25}) .+? \| (.+)$')
    def _build_entry(self, log_line, mesg_lines):
        log_data = '[c:d:*]%s  [g:d:*]%s  [b:d:*]%s  [c:d:*]%s' % log_line
        mesg_data = '\n'.join(mesg_lines).strip()
        if mesg_data:
            mesg_data += '\n'
        mesg_data = mesg_data.replace('[', '\\[')
        mesg_data = mesg_data.replace(']', '\\]')
        return '[b:d:*]' + log_data + '\n' + mesg_data
    def _execute(self, w, **vargs):
        cmd = "svn log %r" % w.buffer.path
        (status, data) = subprocess.getstatusoutput(cmd)

        entries = []
        log_line, mesg_lines = None, []
        for line in data.split('\n'):
            if self.sep_re.match(line):
                if log_line is not None:
                    entries.append(self._build_entry(log_line, mesg_lines))
                    log_line   = None
            else:
                m = self.log_re.match(line)
                if m:
                    log_line   = m.groups()
                    mesg_lines = []
                else:
                    assert log_line is not None, '%r %r' % (entries, line)
                    mesg_lines.append(line)
        data2 = ''.join(entries)

        if status == 0 and data:
            w.application.color_data_buffer("*Log*", data2, switch_to=True)
            w.set_error("%s: logfile" % self.name)
        elif status == 0:
            w.set_error("%s: There was no data" % self.name)
        else:
            w.set_error("%s: There was an error (%s)" % (self.name, status))
        

class SvnDiff(Method):
    '''diff the current file with the version in SVN'''
    def _execute(self, w, **vargs):
        if not hasattr(w.buffer, 'path'):
            w.set_error("Buffer has no corresponding file")
            return

        cmd = "svn diff %r" % w.buffer.path
        (status, data) = subprocess.getstatusoutput(cmd)

        if status == 0:
            if data:
                w.application.data_buffer("*Diff*", data, switch_to=True, modename='diff')
                w.set_error("Differences were found")
            else:
                w.set_error("No difference found")
        else:
            w.set_error("There was an error (%s)" % (status))
class SvnDiff2(Method):
    '''diff the current file with the version in SVN'''
    rev_regex = re.compile('^[0-9]+$')
    args = [Argument("revision", type=type(""), prompt="Old Revision: ")]
    def _execute(self, w, **vargs):
        if not hasattr(w.buffer, 'path'):
            w.set_error("Buffer has no corresponding file")
            return

        rev = vargs['revision']
        if not self.rev_regex.match(rev):
            w.set_error("Could not parse revision: %r" % rev)
            return

        cwd = os.getcwd() + os.path.sep
        path = w.buffer.path
        if path.startswith(cwd):
            path = path[len(cwd):]

        cmd = "svn diff -r %s %r" % (rev, path)
        (status, data) = subprocess.getstatusoutput(cmd)
        status = status >> 8

        if data:
            w.application.data_buffer("*Diff*", data, switch_to=True, modename='diff')
            w.set_error("Differences were found")
        else:
            w.set_error("No difference found")
class SvnDiff3(Method):
    '''diff the current file with the version in SVN'''
    rev_regex = re.compile('^[0-9]+$')
    args = [Argument("revision1", type=type(""), prompt="Old Revision: "),
            Argument("revision2", type=type(""), prompt="New Revision: ")]
    def _execute(self, w, **vargs):
        if not hasattr(w.buffer, 'path'):
            w.set_error("Buffer has no corresponding file")
            return

        rev1 = vargs['revision1']
        if not self.rev_regex.match(rev1):
            w.set_error("Could not parse revision1: %r" % rev)
            return

        rev2 = vargs['revision2']
        if not self.rev_regex.match(rev2):
            w.set_error("Could not parse revision2: %r" % rev)
            return

        cwd = os.getcwd() + os.path.sep
        path = w.buffer.path
        if path.startswith(cwd):
            path = path[len(cwd):]

        cmd = "svn diff -r %s:%s %r" % (rev1, rev2, path)
        (status, data) = subprocess.getstatusoutput(cmd)
        status = status >> 8

        if data:
            w.application.data_buffer("*Diff*", data, switch_to=True, modename='diff')
            w.set_error("Differences were found")
        else:
            w.set_error("No difference found")

class SvnBlame(VcBlame):
    '''show blame output for the current version in SVN'''
    # rev, user, date, [time], [timezone], [date-str], content
    num_fields = 3
    line_re = re.compile(r'^ *(\d+) *([a-zA-Z0-9_]+) *([-0-9]+) *[:0-9]+ *-\d{4} *\(.+?\) (.*)\n$')
    prefix_fmt = '[g:d:*]%*s [c:d:*]%-*s [b:d:*]%*s[d:d:*]'
    pretest_err_msg = 'Subversion is not installed'
    _is_method = True
    def _pretest(self):
        return has_svn
    def _open_pipe(self, w, **vargs):
        cmd = ("svn", 'blame', '-v', w.buffer.path)
        return Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)

class SvnBlame2(SvnBlame):
    '''show file contents in SVN at revision'''
    args = [arg("revision", t=type(""), p="Revision: ", h="revision number")]
    def _open_pipe(self, w, **vargs):
        cmd = ("svn", 'blame', '-v', '-r', vargs['revision'], w.buffer.path)
        return Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)

class SvnRevView(VcRevView):
    '''show file contents in SVN at date'''
    args       = [arg("revision", t=type(""), p="Revision: ", h="revision number")]
    namebase   = 'SVN'
    _is_method = True
    def _get_cmd(self, w, **vargs):
        path = self._get_path(w, **vargs)
        return ("svn", 'cat', '-r', vargs['revision'], path)