from django.db import models
from settings import *
from django.conf import settings

try:
    ADMIN_URL = settings.ADMIN_URL
except AttributeError:
    ADMIN_URL='/admin'
if ADMIN_URL[-1] == '/':
    ADMIN_URL=ADMIN_URL[:-1]

class Tree(models.Model):
    mode = models.CharField("file mode/permissions", blank=False,maxlength=4)
    path = models.CharField("relative path from repo base", maxlength=512)
    id = models.CharField("hash", maxlength=40,blank=False,primary_key=True)
    name = models.CharField("name of dir", maxlength=128,blank=False)
    type = 'tree'
    def slug(self):
        #TODO: secure this
        return ''.join(self.path.strip().lower().split())

    class Admin: 
        ordering = ['path','name']

    def __str__(self):
        return self.name
    def get_absolute_url(self):
        return "/k/%s/" % self.slug()
    def get_admin_url(self):
        return "%s/k/%s/" % (ADMIN_URL, self.id)

    def update(self):
        import commands
        if (not self.id): return
        
        self.id = self.id.strip()
        tree_ls = commands.getoutput(GITPREFIX + ' ls-tree --full-name ' \
                + self.id)
        tree_objs = list()
        blob_objs = list()
        for line in tree_ls.splitlines():
            l = line.split()
            if len(l) < 4:
                continue
            if l[1] == 'tree':
                t = Tree(id=l[2])
                t.path = ' '.join(l[3:])
                if self.path and self.path != '/':
                    t.path = self.path + '/' + t.path
                t.name = t.path
                tree_objs.append(t)
            if l[1] == 'blob':
                i = Item(id=l[2])
                i.path = ' '.join(l[3:])
                if self.path and self.path != '/':
                    i.path = self.path + '/' + i.path
                i.name=i.path
                blob_objs.append(i)
        self.tree_objs = tree_objs
        self.blob_objs = blob_objs
        self.all_objs = tree_objs + blob_objs
        self.save()


class Item(models.Model):
    mode = models.CharField("file mode/permissions", blank=False,maxlength=4)
    path = models.CharField("relative path from repo base", maxlength=512)
    id = models.CharField("hash", maxlength=40,blank=False,primary_key=True)
    name = models.CharField("name of dir", maxlength=128,blank=False)
    size = models.IntegerField("filesize in byte", maxlength=128,blank=False)
    contents = models.TextField("ASCII contents of the file")
    type='blob'
    def slug(self):
        #TODO: secure this
        return ''.join(self.name.strip().lower().split())

    class Admin: 
        ordering = ['path','name']
    def __str__(self):
        return self.name
    def get_absolute_url(self):
        return "/k/%s/" % self.slug()
    def get_admin_url(self):
        return "%s/k/%s/" % (ADMIN_URL, self.id)
    
    def update(self):
        import commands
        if (not self.id): return
        
        self.id = self.id.strip()
        self.contents = commands.getoutput(GITPREFIX + ' cat-file -p  ' \
                + self.id) 
        self.size = commands.getoutput(GITPREFIX + ' cat-file -s  ' + self.id)
        self.save()

class Commit(models.Model):
    id = models.CharField("hash", maxlength=40,blank=False,primary_key=True)
    rawdiff = models.TextField("ASCII contents of full commit diff")
    commit_date = models.DateField("Date of commit to repository")
    author_date = models.DateField("Date commit was writen/created")
    author = models.CharField("Name of commit author", maxlength=96)
    author_email = models.CharField("Email address of commit author",\
        maxlength=196)
    committer = models.CharField("Name of committer", maxlength=96)
    committer_email = models.CharField("Email address of committer", \
        maxlength=196)
    comment = models.TextField("Notes on the commit")
    parenthash = models.CharField("parent's hash", maxlength=40)
    #TODO: parent = models.ForeignKey()
    treehash = models.CharField("tree object's hash", maxlength=40)
    tree = models.ForeignKey(Tree)
    type='commit'

    class Admin: 
        ordering = ['commit_date','author_date','author']
    def __str__(self):
        return self.id
    def get_absolute_url(self):
        return "/k/commit/%s/" % (self.id)
    def get_admin_url(self):
        return "%s/k/commit/%s/" % (ADMIN_URL, self.id)
    
    def update(self):
        import commands,time
        if (not self.id): return
        
        self.id = self.id.strip()
        raw = commands.getoutput(GITPREFIX + ' cat-file -p  ' + self.id)
        self.rawdiff = commands.getoutput(GITPREFIX + ' diff ' + self.id \
                +' | cat')
        
        raw = raw.splitlines()
        if len(raw) < 3: return 
        self.treehash = raw[0].split()[-1].strip()
        if raw[1].startswith('parent'):
            self.parenthash = raw[1][6:].strip()
            raw.pop(1)
        self.author = raw[1].split()[1]
        self.author_date = time.ctime(int(raw[1].split()[-2]))
        self.committer = raw[2].split()[1]
        self.committer_date = time.ctime(int(raw[2].split()[-2]))
        if len(raw) > 3:
            for l in raw[3:]:
                self.comment += str(l) + '\n'
        else:
            self.comment = '(none)'

def fromslug(reqslug):
    import commands
    
    if reqslug == '' or reqslug == '/':
        f = open(GITWIKI_DIR + '/HEAD','r')
        head = f.readline().strip().split()[1]
        f.close()
        f = open(GITWIKI_DIR + '/'+head,'r')
        hash = f.readline().strip()
        f.close()
        ret = Tree(id=hash)
        ret.path='/'
        ret.name='/'
        ret.reqslug = '/'
        return ret

    reqslug = ''.join(reqslug.strip().lower().split())
    if reqslug[-1] == '/':
        reqslug=reqslug[:-1]
    itemtxt = commands.getoutput(GITPREFIX \
            + ' ls-tree -t -r HEAD')
    if not itemtxt:
        return None
    hash, path, type = None, None, None
    for l in itemtxt.splitlines():
        words = l.split()
        if len(words) < 4:
            continue
        ftype = words[1]
        fhash = words[2]
        fpath = ' '.join(words[3:])
        if fpath[-1] == '/':
            fpath=fpath[:-1]
        if ''.join(fpath.strip().lower().split()) == reqslug:
            hash = fhash
            path = fpath
            type = ftype
            break;
    if (not hash) or (not type) or (not path):
        return None
    if type == 'blob':
        ret = Item(id=hash)
    elif type == 'tree':
        ret = Tree(id=hash)
    ret.path=path
    ret.name=path
    ret.reqslug = reqslug
    return ret

def reposcan():
    import os
    heads = dict()
    for h in os.listdir(GITWIKI_DIR + '/refs/heads/'):
        f = open(GITWIKI_DIR + '/refs/heads/' + h,'r')
        heads[h.strip()] = f.readline().strip()
        f.close()
    tags = dict()
    for t in os.listdir(GITWIKI_DIR + '/refs/tags/'):
        f = open(GITWIKI_DIR + '/refs/tags/' + t,'r')
        tags[t.strip()] = f.readline().strip()
        f.close()
    return (heads, tags)

def shortlog(hash=None,tree=None):
    import commands

    if tree: 
        hash=tree.id
    logtxt = commands.getoutput(GITPREFIX \
            + ' log --relative-date --max-count=6 | cat')
    log_items = logtxt.split('\ncommit ')
    if (log_items[0] == ''):
        log_items.pop(0)
    if (log_items[0].startswith('commit ')):
        log_items[0] = log_items[0][7:]
    shortlog = list()
    for li in log_items:
        logobj = dict()
        lines = li.splitlines()
        if len(lines) < 3: continue
        logobj['hash'] = lines[0].strip()
        logobj['shorthash'] = lines[0].strip()[:5]
        logobj['author'] = lines[1][8:]
        logobj['date'] = lines[2][8:]
        if len(lines) > 4:
            logobj['description'] = lines[4][4:]
        else:
            logobj['description'] = '(none)'
        # here we truncate commit comments for shortlogs
        logobj['shortdescription'] = logobj['description'][:128]
        shortlog.append(logobj)
    return shortlog