import os
import re
from pathlib import Path

from django.shortcuts import render, redirect
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 expofiles_redirect(request, path):
    '''This is used only when running as a test system without a local copy of /expofiles/
    '''
    return redirect('http://expo.survex.com/expofiles/' + path)

def flatpage(request, path):
    #print(" - FLATPAGES delivering the file: {} as MIME type: {}".format(path,getmimetype(path)))
    # try:
        # r = Redirect.objects.get(originalURL = path)
        # #print(" - FLATPAGES REDIRECT the file: {} as: {}".format(path,r))
        # 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)

    expowebpath = Path(settings.EXPOWEB)
    if path.endswith("/") or path == "":
        #print(" - FLATPAGES the file: {} ENDSWITH ...".format(path))

        try:
            o = open(os.path.normpath(expowebpath / path / "index.html"), "rb")
            path = path + "index.html"
        except IOError:
            try:
                o = open(os.path.normpath(expowebpath / path / "index.htm"), "rb")
                path = path + "index.htm"
            except IOError:
                return render(request, 'pagenotfound.html', {'path': path})
    else:
        try:
            #print(" - FLATPAGES the file: '{}'  ...".format(path))
            #print(" - FLATPAGES MEDIA_ROOT: '{}'  ...".format(settings.MEDIA_ROOT))
            if path.startswith('site_media'):
                #print(" - MEDIA_ROOT: {}  ...".format(settings.MEDIA_ROOT))
                path = path.replace("site_media", settings.MEDIA_ROOT)
                filetobeopened = os.path.normpath(path)
            elif path.startswith("static"):
                #print(" - STATIC_ROOT: {}  ...".format(settings.MEDIA_ROOT))
                path = path.replace("static", settings.MEDIA_ROOT)
                filetobeopened = os.path.normpath(path)
            else:
                #print(" - NO    _ROOT: {}  ...".format(expowebpath))
                filetobeopened = os.path.normpath(expowebpath / path)
            
            #print(" - FLATPAGES full path : {}  ...".format(filetobeopened))
            o = open(filetobeopened, "rb")
            #print(" - FLATPAGES full path no error: {}  ...".format(filetobeopened))
        except IOError:
            #print(" - FLATPAGES ERROR: {}  ...".format(filetobeopened))
            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 + "HTML Parsing failure: Page could not be split into header and body: 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:
        #print(" - FLATPAGES delivering the file: {} as MIME type: {}".format(path,getmimetype(path)))
        return HttpResponse(o.read(), content_type=getmimetype(path))

def getmimetype(path):
    if path.lower().endswith(".css"): return "text/css"
    if path.lower().endswith(".txt"): return "text/css"
    if path.lower().endswith(".js"): return "application/javascript"
    if path.lower().endswith(".json"): return "application/javascript"
    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("xml"): return "image/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}))