import json
from pathlib import Path

import django.forms as forms
from django.contrib.auth.models import User
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import redirect, render
from django.urls import reverse

import troggle.settings as settings
from troggle.core.models.troggle import DataIssue, Person, PersonExpedition
from troggle.core.models.logbooks import Expedition
from troggle.core.views.editor_helpers import HTMLarea
from troggle.core.utils import (
    WriteAndCommitError,
    add_commit,
    current_expo,
    get_cookie,
    get_git_string,  
    git_string,
    is_identified_user,
    write_and_commit,
)
from troggle.parsers.users import get_encryptor, ENCRYPTED_DIR, how_many_previous_expos
from .auth import login_required_if_public

"""The new user signup form and expo user management system in 2025.
"""
SIGNUPS_FILE = "signups.json"
SIGNEDUP = "SIGNEDUP"
BIERBOOK = "documents/bierbook"
BIERFILE = "names.txt"

SIGNUP_YEAR = "2025"
SIGNUP_DATES = "30th June - 3rd August"

def signupok(request):
    signup_user = request.user
    if signup_user.username in ["expo", "expoadmin"]:
        signup_user = None  
        
    signedup_people = []
    signups_clear = read_signups()
    for su in signups_clear:
        signedup_people.append(su)

    return render(
        request, "login/signupok.html",
        {"year": SIGNUP_YEAR, "dates": SIGNUP_DATES, "signup_user": signup_user, "signedup_people":  signedup_people},
    )

@login_required_if_public        
def signup(request):
    """Displays and processes the applicant signup form for the forthcoming expo
    The user must be logged-on as a personal login and that is
    who is being signed up. You can't signup someone else.
    """
    form_read_only = True # default
    signup_user = request.user
    identified_login = is_identified_user(signup_user)
        
    if identified_login:
        editor = get_git_string(signup_user)    
        form_read_only = False
    else:
        get_cookie(request) # might be blank
         # No, just make the form read-only.
        # return HttpResponseRedirect("/accounts/login/") 

    if signup_user.is_anonymous:
        experience = 0
    else:
        people = Person.objects.filter(user=signup_user)
        if len(people) == 1:
            signup_person = people[0]
            form_read_only = False
            experience = how_many_previous_expos(signup_person)
        else:
            experience = 0
            # No, just make the form read-only.
            # return HttpResponseRedirect("/accounts/login")
 
    
    if request.method == "POST":  # If the form has been submitted...
        pageform = ExpoSignupForm(request.POST)  # A form bound to the POST data
        if pageform.is_valid(): 
            clean = pageform.cleaned_data
            print(f" # Signup form OK {clean['name']}")
            register_on_expo(signup_person)
            save_signups(editor, signup_person.slug, clean)
            return HttpResponseRedirect("/signupok")

        else:
            print(f" # Signup form INVALID\n{pageform.errors} ") 
        return render(
            request, "login/signup.html",      
            {"form": pageform, "identified_login": identified_login,
            "year": SIGNUP_YEAR, "dates": SIGNUP_DATES,
            }
        )
    else:
        signups_clear = read_signups()
        if signup_user.username in signups_clear:
            # pre-load form with previously saved data
            initial_context = signups_clear[signup_user.username]
        else:
            initial_context = {"allergies":"None", 
                "medication":"None",
                "medic_info":"None", 
                "veggie": "mostly",
                "student": "no",
                "top_tent_cap": 2,
                "base_tent_cap": 3,
               }
        if identified_login:
            initial_context["name"] = signup_person.fullname
            initial_context["email"] = signup_user.email
            initial_context["experience"] = experience
            
        pageform = ExpoSignupForm(initial=initial_context)
        return render(
            request, "login/signup.html",
            {"form": pageform, "identified_login": identified_login,
            "year": SIGNUP_YEAR, "dates": SIGNUP_DATES,
            },
        )

def register_on_expo(signup_person):
    signup = PersonExpedition(person=signup_person, expedition=Expedition.objects.get(year=SIGNUP_YEAR))
    signup.save()

def read_signups():
    # print(f" + READ signups")
    # This has a big BUG. when it works, it returns a dict with keys such as "philip-sargent"
    # but the error conditions are returning a dict of dicts
    f = get_encryptor()
    signups_dir = settings.EXPOWEB / ENCRYPTED_DIR / current_expo()
    if not signups_dir.is_dir():
        signups_dir.mkdir(parents=True, exist_ok=True)
        
    signupsfile = signups_dir / SIGNUPS_FILE
    if not signupsfile.is_file():
        return { "SIGNEDUP": {} } # dict where e.g. {"philip-sargent": encrypted_form_data, more users etc.}
        
    with open(signupsfile, 'r', encoding='utf-8') as json_f:
        message = ""
        try:
            signups_single_dict = json.load(json_f)
        except FileNotFoundError:
            message = f"File {signupsfile} not found!"
        except json.JSONDecodeError:
            message = f"Invalid JSON format! - JSONDecodeError for  {signupsfile}"
        except Exception as e:
            message = f"! Troggle USERs.  Failed to load {signupsfile} JSON file. Exception <{e}>"
        if message:
            print(message)
            DataIssue.objects.update_or_create(parser="_signups", message=message, url="") ###########################
            return { "SIGNEDUP": {} }
    signups_dict = signups_single_dict[SIGNEDUP]
    # print("ALL:",signups_dict)
    signups_clear ={}
    for su, content in signups_dict.items():
        clear_text = f.decrypt(content).decode()
        # print(f"\n - {su} -  {clear_text}")
        signups_clear[su] = json.loads(clear_text)

    return signups_clear
    
# def is_signedup(person):
    # signups_clear = read_signups()
    # print(signups_clear)
    # if person.slug in signups_clear:
        # return True
    # return False
    

def save_signups(editor, person_slug, clean):
    # print(f" + SAVE: Saving all signups")
    f = get_encryptor()
    signups_clear = read_signups()
    # print(f"   SAVE: {len(signups_clear)} signups read")
    
    signups_clear[person_slug] = clean
    
    signups_crypt = {}
    for su in signups_clear:
        # re-encrypt everything
        signups_crypt[su] = f.encrypt(json.dumps(signups_clear[su]).encode("utf8")).decode() 
        
    print(f"   SAVE after adding: {len(signups_crypt)} signups")
    encryptedfile = settings.EXPOWEB / ENCRYPTED_DIR / current_expo() / SIGNUPS_FILE
    try:
        print(f"- Rewriting the entire encrypted set of signups to disc ")
        write_signups(signups_crypt, encryptedfile, editor)
    except:
        message = f'! - Users encrypted data saving failed - \n!! Permissions failure ?! on attempting to save file "{encryptedfile}"'
        print(message)
        raise
        return render(request, "errors/generic.html", {"message": message})
 
    print(f"- Exporting bierbook ")
    write_bierbook(signups_clear, editor)

def write_signups(signups, encryptedfile, editor):       
    jsondict = { SIGNEDUP: signups }
    try:
        with open(encryptedfile, 'w', encoding='utf-8') as json_f:
            json.dump(jsondict, json_f, indent=1)
    except Exception as e:
         print(f" ! Exception dumping json <{e}>")
         raise
       
    commit_msg = f"Online signup to next expo"
    try:
        add_commit(encryptedfile, commit_msg, editor)
    except Exception as e:
         print(f" ! Exception doing git add/commit <{e}>")
         raise
    return True
    
def write_bierbook(signups_clear, editor):
    bieryeardir = settings.EXPOWEB / BIERBOOK / current_expo()
    bierfile =  bieryeardir / BIERFILE
    print(bierfile)
    
    names = ""
    for id in signups_clear:
        names += f"{signups_clear[id]['name']}\n"
        
    for i in range(0,3):
        names += "\\ldots\\ldots\\ldots\n"
          
    print(names)
    if not bieryeardir.is_dir():
        bieryeardir.mkdir(parents=True, exist_ok=True)
    
    write_and_commit( [(bierfile, names, "utf8")], f"(re)writing bierbook names", editor)
   
class ExpoSignupForm(forms.Form):
    name = forms.CharField(label='Full name', max_length=100, widget=forms.TextInput(attrs={'tabindex': 1, 'placeholder': 'Anathema Device'}))
    address = forms.CharField(widget=forms.Textarea(attrs={'rows': 7, 'cols': 20, 'tabindex': 2, 'placeholder': 'The Airfield,\nTadfield'}))
    phone = forms.CharField(max_length=15, widget=forms.TextInput(attrs={'tabindex': 3, 'placeholder': '+44.1234567890'}))
    email = forms.EmailField(widget=forms.TextInput(attrs={'tabindex': 4, 'placeholder': 'a.device@potatohut.expo'}))

    kin_name = forms.CharField(label='Next of Kin name', max_length=100, widget=forms.TextInput(attrs={'tabindex': 5, 'placeholder': 'Newton Pulsifer'}))
    kin_address = forms.CharField(widget=forms.Textarea(attrs={'rows': 7, 'cols': 20, 'tabindex': 6, 'placeholder': 'c/o The Old Ship Inn,\nLower Tadfield'}))
    kin_phone = forms.CharField(max_length=15, widget=forms.TextInput(attrs={'tabindex': 7, 'placeholder': '+44.0987654321'}))
    kin_email = forms.EmailField(widget=forms.TextInput(attrs={'tabindex': 8, 'placeholder': 'n.pulsifer@basecamp.expo'}))
    relation = forms.CharField(label='Relation to you', max_length=100, widget=forms.TextInput(attrs={'tabindex': 9, 'placeholder': 'Beau'}))

    VEGGIE_CHOICES = [
        ('vegan', 'Vegan'),
        ('yes', 'Vegetarian'),
        ('mostly', 'Mostly Vegetarian'),
        ('no', 'No'),
    ]

    STUDENT_CHOICES = [
        ('yes', 'Yes, I am an impecunious starvelling'),
        ('no', 'No, I have pots of dosh'),
    ]

    veggie = forms.ChoiceField(choices=VEGGIE_CHOICES, widget=forms.RadioSelect(attrs={'tabindex': 10}))
    student = forms.ChoiceField(choices=STUDENT_CHOICES, widget=forms.RadioSelect(attrs={'tabindex': 11}))

    transport_ok = forms.ChoiceField(choices=[('yes', 'Yes, I have arranged transport and it is shown on that page'), ('no', 'No, I need to arrange or confirm transport')],
                                     widget=forms.RadioSelect(attrs={'tabindex': 12}), initial='no')
    insurance_info = forms.CharField(widget=forms.Textarea(attrs={'rows': 3, 'cols': 80, 'tabindex': 13, "placeholder":"I do not have any insurance and I don't know what I need."}),
                                     required=False)
    transport_info = forms.CharField(widget=forms.Textarea(attrs={'rows': 3, 'cols': 80, 'tabindex': 13, "placeholder":"I am a numpty and have no clue how I will get there (or back)."}),
                                     required=False)

    bivvy = forms.BooleanField(required=False, widget=forms.CheckboxInput(attrs={'tabindex': 14, }))
    tent = forms.BooleanField(required=False, widget=forms.CheckboxInput(attrs={'tabindex': 15}))
    top_tent_cap = forms.IntegerField(required=False, widget=forms.TextInput(attrs={'size': 1, 'tabindex': 16, "placeholder":2}))
    btent = forms.BooleanField(required=False, widget=forms.CheckboxInput(attrs={'tabindex': 17}))
    base_tent_cap = forms.IntegerField(required=False, widget=forms.TextInput(attrs={'size': 1, 'tabindex': 18, "size":1, "placeholder":3}))

    allergies = forms.CharField(widget=forms.Textarea(attrs={'rows': 2, 'cols': 80, 'tabindex': 19}), required=False)
    medication = forms.CharField(widget=forms.Textarea(attrs={'rows': 2, 'cols': 80, 'tabindex': 20}), required=False)
    medic_info = forms.CharField(widget=forms.Textarea(attrs={'rows': 2, 'cols': 80, 'tabindex': 21}), required=False)

    extra_info = forms.CharField(widget=forms.Textarea(attrs={'rows': 3, 'cols': 80, 'tabindex': 22, 
    'placeholder': 'Estuary english (fluent),\nCan use the potato hut bread machine (level 3 certificate)'}), required=False)

    aims = forms.CharField(widget=forms.Textarea(attrs={'rows': 3, 'cols': 80, 'tabindex': 23, 'placeholder': 'Strolling over the plateau, sunning myself and taking in the views.'}), required=False)
    experience = forms.IntegerField(required=True, widget=forms.TextInput(attrs={'size': 1, 'tabindex': 24, 'readonly': 'readonly'}))