import os
import re

from django.shortcuts import render
from django.http import HttpResponse, HttpResponseRedirect, Http404
from django.urls import reverse, resolve
from django.template import Context, loader
import django.forms as forms

from troggle.helper import login_required_if_public
from troggle.flatpages.models import Redirect, EntranceRedirect
from troggle.core.models_caves import Cave
import troggle.core.views_caves
import troggle.settings as settings

def flatpage(request, path):
    try:
        r = Redirect.objects.get(originalURL = path)
        return HttpResponseRedirect(r.newURL) # Redirect after POST
    except Redirect.DoesNotExist:
        pass

    try:
        r = Cave.objects.get(url = path)
        return troggle.core.views_caves.caveSlug(request, r.slug())
    except Cave.DoesNotExist:
        pass
    except:
        print(" ! FAILED to get only one cave per slug for: "+path)
        caves = Cave.objects.all().filter(url = path)
        for c in caves:
            print(path, c.slug())
            if c.slug() != None:
                return troggle.core.views_caves.caveSlug(request, c.slug())
        pass

    try:
        r = EntranceRedirect.objects.get(originalURL = path)
        return troggle.core.views_caves.entranceSlug(request, r.entrance.slug())
    except EntranceRedirect.DoesNotExist:
        pass


    if path.startswith("noinfo") and settings.PUBLIC_SITE and not request.user.is_authenticated():
        print(("flat path noinfo", path))
        return HttpResponseRedirect(reverse("auth_login") + '?next=%s' % request.path)

    if path.endswith("/") or path == "":
        try:
            o = open(os.path.normpath(settings.EXPOWEB + path + "index.html"), "rb")
            path = path + "index.html"
        except IOError:
            try:
                o = open(os.path.normpath(settings.EXPOWEB + path + "index.htm"), "rb")
                path = path + "index.htm"
            except IOError:
                return render(request, 'pagenotfound.html', {'path': path})
    else:        
        try:
            filetobeopened = os.path.normpath(settings.EXPOWEB + path)
            o = open(filetobeopened, "rb")
        except IOError:
            return render(request, 'pagenotfound.html', {'path': path})
    if path.endswith(".htm") or path.endswith(".html"):
        html = o.read()
        
        m = re.search(rb'(.*)<\s*head([^>]*)>(.*)<\s*/head\s*>(.*)<\s*body([^>]*)>(.*)<\s*/body\s*>(.*)', html, re.DOTALL + re.IGNORECASE)
        if m:
            preheader, headerattrs, head, postheader, bodyattrs, body, postbody = m.groups()
        else:
            return HttpResponse(html + "Page could not be split into header and body: parsing failed in flatpages.views.py")
        m = re.search(rb"<title>(.*)</title>", head, re.DOTALL + re.IGNORECASE)
        if m:
            title, = m.groups()
        else:
            title = ""
        m = re.search(rb"<meta([^>]*)noedit", head, re.DOTALL + re.IGNORECASE)
        if m:
            editable = False
        else:
            editable = True
        
        has_menu = False
        menumatch = re.match(rb'(.*)<div id="menu">', body, re.DOTALL + re.IGNORECASE)
        if menumatch:
            has_menu = True
        menumatch = re.match(rb'(.*)<ul id="links">', body, re.DOTALL + re.IGNORECASE)
        if menumatch:
            has_menu = True
            #body, = menumatch.groups()
#        if re.search(rb"iso-8859-1", html):
#            body = str(body, "iso-8859-1")
#            body.strip
        return render(request, 'flatpage.html', {'editable': editable, 'path': path, 'title': title, 
                    'body': body, 'homepage': (path == "index.htm"), 'has_menu': has_menu})
    else:
        return HttpResponse(o.read(), content_type=getmimetype(path))

def getmimetype(path):
    if path.lower().endswith(".png"): return "image/png"
    if path.lower().endswith(".tif"): return "image/tif"
    if path.lower().endswith(".gif"): return "image/gif"
    if path.lower().endswith(".jpeg"): return "image/jpeg"
    if path.lower().endswith(".jpg"): return "image/jpeg"
    if path.lower().endswith("svg"): return "image/svg+xml"
    if path.lower().endswith(".pdf"): return "application/pdf"
    if path.lower().endswith(".ps"): return "application/postscript"
    if path.lower().endswith(".svx"): return "application/x-survex-svx"
    if path.lower().endswith(".3d"): return "application/x-survex-3d"
    if path.lower().endswith(".pos"): return "application/x-survex-pos"
    if path.lower().endswith(".err"): return "application/x-survex-err"
    if path.lower().endswith(".odt"): return "application/vnd.oasis.opendocument.text"
    if path.lower().endswith(".ods"): return "application/vnd.oasis.opendocument.spreadsheet"
    return ""

@login_required_if_public
def editflatpage(request, path):
    try:
        r = Cave.objects.get(url = path)
        return troggle.core.views_caves.editCave(request, r.cave.slug)
    except Cave.DoesNotExist:
        pass


    try:
        filepath = os.path.normpath(settings.EXPOWEB + path)
        o = open(filepath, "r")
        html = o.read()
        autogeneratedmatch = re.search(r"\<\!--\s*(.*?(Do not edit|auto-generated).*?)\s*--\>", html, re.DOTALL + re.IGNORECASE)
        if autogeneratedmatch:
            return HttpResponse(autogeneratedmatch.group(1))
        m = re.search(r"(.*)<head([^>]*)>(.*)</head>(.*)<body([^>]*)>(.*)</body>(.*)", html, re.DOTALL + re.IGNORECASE)
        if m:
            filefound = True
            preheader, headerargs, head, postheader, bodyargs, body, postbody = m.groups()
            linksmatch = re.match(r'(.*)(<ul\s+id="links">.*)', body, re.DOTALL + re.IGNORECASE)
            if linksmatch:
                body, links = linksmatch.groups()
#            if re.search(r"iso-8859-1", html):
#                body = str(body, "iso-8859-1")
        else:
            return HttpResponse("Page could not be split into header and body")
    except IOError:
        filefound = False
        

    if request.method == 'POST': # If the form has been submitted...
        flatpageForm = FlatPageForm(request.POST) # A form bound to the POST data
        if flatpageForm.is_valid():# Form valid therefore write file
            if filefound:
                headmatch =  re.match(r"(.*)<title>.*</title>(.*)", head, re.DOTALL + re.IGNORECASE)
                if headmatch:
                    head = headmatch.group(1) + "<title>" + flatpageForm.cleaned_data["title"] + "</title>" + headmatch.group(2)
                else:
                    head = "<title>" + flatpageForm.cleaned_data["title"] + "</title>"
            else:
                head = "<title>" + flatpageForm.cleaned_data["title"] + "</title>"
                preheader = "<html>"
                headerargs = ""
                postheader = ""
                bodyargs = ""
                postbody = "</html>" 
            body = flatpageForm.cleaned_data["html"]
            body = body.replace("\r", "")
            result = "%s<head%s>%s</head>%s<body%s>\n%s</body>%s" % (preheader, headerargs, head, postheader, bodyargs, body, postbody)
            f = open(filepath, "w")
            f.write(result)
            f.close()
            return HttpResponseRedirect(reverse('flatpage', args=[path])) # Redirect after POST
    else:
        if filefound:
            m = re.search(r"<title>(.*)</title>", head, re.DOTALL + re.IGNORECASE)
            if m: 
                title, = m.groups()
            else:
                title = ""
            flatpageForm = FlatPageForm({"html": body, "title": title})
        else:
            flatpageForm = FlatPageForm()
    return render(request, 'editflatpage.html', {'path': path, 'form': flatpageForm, })

class FlatPageForm(forms.Form):
    title = forms.CharField(widget=forms.TextInput(attrs={'size':'60'}))

    #html = forms.CharField(widget=TinyMCE(attrs={'cols': 80, 'rows': 20}))
    html = forms.CharField(widget=forms.Textarea(attrs={"cols":80, "rows":20}))