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.utils import (
    COOKIE_MAX_AGE,
    WriteAndCommitError,
    current_expo,
    get_cookie,
    git_string,
    write_and_commit,
)
from troggle.core.models.troggle import DataIssue, Person
from troggle.core.views.editor_helpers import HTMLarea
from troggle.core.utils import (
    add_commit,
)
from troggle.parsers.users import get_encryptor, ENCRYPTED_DIR

"""The new user signup form and expo user management system in 2025.
"""
SIGNUPS_FILE = "signups.json"
SIGNEDUP = "SIGNEDUP"
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},
    )

def signup(request):
    """Display 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 sighned up. You can't signup someone else.
    """
    signup_user = request.user
    
    if signup_user.is_anonymous:
        personal_login = False
    elif signup_user.username in ["expo", "expoadmin"]:
        personal_login = False
    else:
        personal_login = True
       
    if personal_login:
        people = Person.objects.filter(user=signup_user)
        if len(people) != 1:
            # someone like "fluffy-bunny" not associated with a Person
            return HttpResponseRedirect("/accounts/login/?next=/signup")
        signup_person = people[0]
    editor = f"{signup_person.fullname} <{signup_user.email}>"    
       
    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']}")
            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, "personal_login": personal_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 personal_login:
            initial_context["name"] = signup_person.fullname
            initial_context["email"] = signup_user.email

            

        pageform = ExpoSignupForm(initial=initial_context)
        return render(
            request, "login/signup.html",
            {"form": pageform, "personal_login": personal_login,
            "year": SIGNUP_YEAR, "dates": SIGNUP_DATES,
            },
        )

def read_signups():
    print(f" + READ signups")
    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 - C signups_dict {su} -  {clear_text}")
        signups_clear[su] = json.loads(clear_text)

    return signups_clear
    

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})

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

   
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')
    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)