from urllib.parse import urlencode
from files.mail import *
from files.__main__ import app, limiter
from files.helpers.const import *
from files.helpers.regex import *
from files.helpers.actions import *
from files.helpers.get import *
import requests
import secrets

@app.get("/login")
@auth_desired
def login_get(v):

	redir = request.values.get("redirect", "/")
	if redir:
		redir = redir.replace("/logged_out", "").strip().rstrip('?')
		if not is_site_url(redir): redir = "/"
		if v: return redirect(redir)

	return render_template("login.html", failed=False, redirect=redir)


def check_for_alts(current):
	current_id = current.id
	if current_id in (1691,6790,7069,36152):
		session["history"] = []
		return
	ids = [x[0] for x in g.db.query(User.id).all()]
	past_accs = set(session.get("history", []))

	for past_id in list(past_accs):
		
		if past_id not in ids:
			past_accs.remove(past_id)
			continue

		if past_id == MOM_ID or current_id == MOM_ID: break
		if past_id == current_id: continue

		li = [past_id, current_id]
		existing = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).one_or_none()

		if not existing:
			new_alt = Alt(user1=past_id, user2=current_id)
			g.db.add(new_alt)
			g.db.flush()
			
		otheralts = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).all()
		for a in otheralts:
			if a.user1 != past_id:
				li = [a.user1, past_id]
				existing = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).one_or_none()
				if not existing:
					new_alt = Alt(user1=a.user1, user2=past_id)
					g.db.add(new_alt)
					g.db.flush()

			if a.user1 != current_id:
				li = [a.user1, current_id]
				existing = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).one_or_none()
				if not existing:
					new_alt = Alt(user1=a.user1, user2=current_id)
					g.db.add(new_alt)
					g.db.flush()

			if a.user2 != past_id:
				li = [a.user2, past_id]
				existing = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).one_or_none()
				if not existing:
					new_alt = Alt(user1=a.user2, user2=past_id)
					g.db.add(new_alt)
					g.db.flush()

			if a.user2 != current_id:
				li = [a.user2, current_id]
				existing = g.db.query(Alt).filter(Alt.user1.in_(li), Alt.user2.in_(li)).one_or_none()
				if not existing:
					new_alt = Alt(user1=a.user2, user2=current_id)
					g.db.add(new_alt)
					g.db.flush()
	
	past_accs.add(current_id)
	session["history"] = list(past_accs)
	g.db.flush()
	for u in current.alts_unique:
		if u.shadowbanned:
			current.shadowbanned = u.shadowbanned
			if not current.is_banned: current.ban_reason = u.ban_reason
			g.db.add(current)
		elif current.shadowbanned:
			u.shadowbanned = current.shadowbanned
			if not u.is_banned: u.ban_reason = current.ban_reason
			g.db.add(u)


@app.post("/login")
@limiter.limit("1/second;6/minute;200/hour;1000/day")
def login_post():
	template = ''

	username = request.values.get("username")

	if not username: abort(400)
	username = username.lstrip('@').replace('\\', '').replace('_', '\_').replace('%', '').strip()

	if not username: abort(400)
	if username.startswith('@'): username = username[1:]

	if "@" in username:
		try: account = g.db.query(User).filter(User.email.ilike(username)).one_or_none()
		except: return "Multiple users use this email!"
	else: account = get_user(username, graceful=True)

	if not account:
		time.sleep(random.uniform(0, 2))
		return render_template("login.html", failed=True)


	if request.values.get("password"):

		if not account.verifyPass(request.values.get("password")):
			time.sleep(random.uniform(0, 2))
			return render_template("login.html", failed=True)

		if account.mfa_secret:
			now = int(time.time())
			hash = generate_hash(f"{account.id}+{now}+2fachallenge")
			return render_template("login_2fa.html",
								v=account,
								time=now,
								hash=hash,
								redirect=request.values.get("redirect", "/")
								)
	elif request.values.get("2fa_token", "x"):
		now = int(time.time())

		try:
			if now - int(request.values.get("time")) > 600:
				return redirect('/login')
		except:
			abort(400)

		formhash = request.values.get("hash")
		if not validate_hash(f"{account.id}+{request.values.get('time')}+2fachallenge", formhash):
			return redirect("/login")

		if not account.validate_2fa(request.values.get("2fa_token", "").strip()):
			hash = generate_hash(f"{account.id}+{now}+2fachallenge")
			return render_template("login_2fa.html",
								v=account,
								time=now,
								hash=hash,
								failed=True,
								)
	else:
		abort(400)

	on_login(account)

	redir = request.values.get("redirect")
	if redir:
		redir = redir.replace("/logged_out", "").strip().rstrip('?')
		if is_site_url(redir): return redirect(redir)
	return redirect('/')

def on_login(account, redir=None):
	session["lo_user"] = account.id
	session["login_nonce"] = account.login_nonce
	if account.id == AEVANN_ID: session["verified"] = time.time()
	check_for_alts(account)

@app.get("/me")
@app.get("/@me")
@auth_required
def me(v):
	if request.headers.get("Authorization"): return v.json
	else: return redirect(v.url)


@app.post("/logout")
@limiter.limit("1/second;30/minute;200/hour;1000/day")
@limiter.limit("1/second;30/minute;200/hour;1000/day", key_func=lambda:f'{SITE}-{session.get("lo_user")}')
@auth_required
def logout(v):

	loggedin = cache.get(f'{SITE}_loggedin') or {}
	if session.get("lo_user") in loggedin: del loggedin[session["lo_user"]]
	cache.set(f'{SITE}_loggedin', loggedin)

	session.pop("lo_user", None)

	return {"message": "Logout successful!"}


@app.get("/signup")
@auth_desired
def sign_up_get(v):
	if not app.config['SETTINGS']['Signups']:
		return {"error": "New account registration is currently closed. Please come back later."}, 403

	if v: return redirect(SITE_FULL)

	ref = request.values.get("ref")

	if ref:
		ref = ref.replace('\\', '').replace('_', '\_').replace('%', '').strip()
		ref_user = g.db.query(User).filter(User.username.ilike(ref)).one_or_none()

	else:
		ref_user = None

	if ref_user and (ref_user.id in session.get("history", [])):
		return render_template("sign_up_failed_ref.html")

	now = int(time.time())
	token = token_hex(16)
	session["signup_token"] = token

	formkey_hashstr = str(now) + token + g.agent

	formkey = hmac.new(key=bytes(MASTER_KEY, "utf-16"),
					msg=bytes(formkey_hashstr, "utf-16"),
					digestmod='md5'
					).hexdigest()

	error = request.values.get("error")

	redir = request.values.get("redirect", "/")
	if redir:
		redir = redir.replace("/logged_out", "").strip().rstrip('?')
		if not is_site_url(redir): redir = "/"

	return render_template("sign_up.html",
						formkey=formkey,
						now=now,
						ref_user=ref_user,
						hcaptcha=HCAPTCHA_SITEKEY,
						error=error,
						redirect=redir
						)


@app.post("/signup")
@limiter.limit("1/second;10/day")
@auth_desired
def sign_up_post(v):
	if not app.config['SETTINGS']['Signups']:
		return {"error": "New account registration is currently closed. Please come back later."}, 403

	if v: abort(403)

	form_timestamp = request.values.get("now", '0')
	form_formkey = request.values.get("formkey", "none")

	submitted_token = session.get("signup_token", "")
	if not submitted_token: abort(400)

	correct_formkey_hashstr = form_timestamp + submitted_token + g.agent

	correct_formkey = hmac.new(key=bytes(MASTER_KEY, "utf-16"),
								msg=bytes(correct_formkey_hashstr, "utf-16"),
								digestmod='md5'
							).hexdigest()

	now = int(time.time())

	username = request.values.get("username")
	
	if not username: abort(400)

	username = username.strip()

	def signup_error(error):

		args = {"error": error}
		if request.values.get("referred_by"):
			user = get_account(request.values.get("referred_by"), include_shadowbanned=False)
			if user: args["ref"] = user.username

		return redirect(f"/signup?{urlencode(args)}")

	if now - int(form_timestamp) < 5:
		return signup_error("There was a problem. Please try again.")

	if not hmac.compare_digest(correct_formkey, form_formkey):
		return signup_error("There was a problem. Please try again!")

	if not request.values.get(
			"password") == request.values.get("password_confirm"):
		return signup_error("Passwords did not match. Please try again.")

	if not valid_username_regex.fullmatch(username):
		return signup_error("Invalid username")

	if not valid_password_regex.fullmatch(request.values.get("password")):
		return signup_error("Password must be between 8 and 100 characters.")

	email = request.values.get("email").strip().lower()

	if email:
		if not email_regex.fullmatch(email):
			return signup_error("Invalid email.")
	else: email = None

	existing_account = get_user(username, graceful=True)
	if existing_account and existing_account.reserved:
		return redirect(existing_account.url)

	if existing_account:
		return signup_error("An account with that username already exists.")

	if HCAPTCHA_SITEKEY:
		token = request.values.get("h-captcha-response")
		if not token:
			return signup_error("Unable to verify captcha [1].")

		data = {"secret": HCAPTCHA_SECRET,
				"response": token,
				"sitekey": HCAPTCHA_SITEKEY}
		url = "https://hcaptcha.com/siteverify"

		x = requests.post(url, data=data, timeout=5)

		if not x.json()["success"]:
			return signup_error("Unable to verify captcha [2].")

	session.pop("signup_token")

	ref_id = int(request.values.get("referred_by", 0))

	users_count = g.db.query(User).count()
	if users_count == 4:
		admin_level=3
		session["history"] = []
	else: admin_level=0

	profileurl = None
	if PFP_DEFAULT_MARSEY:
		profileurl = '/e/' + random.choice(marseys_const) + '.webp'

	new_user = User(
		username=username,
		original_username = username,
		admin_level = admin_level,
		password=request.values.get("password"),
		email=email,
		referred_by=ref_id or None,
		profileurl=profileurl
		)

	g.db.add(new_user)

	g.db.commit()

	if ref_id:
		ref_user = get_account(ref_id)

		if ref_user:
			badge_grant(user=ref_user, badge_id=10)
			# off-by-one: newly referred user isn't counted
			if ref_user.referral_count >= 9:
				badge_grant(user=ref_user, badge_id=11)
			if ref_user.referral_count >= 99:
				badge_grant(user=ref_user, badge_id=12)

	if email:
		send_verification_email(new_user)


	check_for_alts(new_user)
	
	send_notification(new_user.id, WELCOME_MSG)

	session["lo_user"] = new_user.id
	
	if SITE == 'watchpeopledie.co':
		carp = get_account(CARP_ID)
		new_follow = Follow(user_id=new_user.id, target_id=carp.id)
		g.db.add(new_follow)
		carp.stored_subscriber_count += 1
		g.db.add(carp)
		send_notification(carp.id, f"A new user - @{new_user.username} - has followed you automatically!")

	redir = request.values.get("redirect")
	if redir:
		redir = redir.replace("/logged_out", "").strip().rstrip('?')
		if is_site_url(redir): return redirect(redir)
	return redirect('/')


@app.get("/forgot")
def get_forgot():
	return render_template("forgot_password.html")


@app.post("/forgot")
@limiter.limit("1/second;30/minute;200/hour;1000/day")
def post_forgot():

	username = request.values.get("username")
	if not username: abort(400)

	email = request.values.get("email",'').strip().lower()

	if not email_regex.fullmatch(email):
		return render_template("forgot_password.html", error="Invalid email.")


	username = username.lstrip('@').replace('\\', '').replace('_', '\_').replace('%', '').strip()
	email = email.replace('\\', '').replace('_', '\_').replace('%', '').strip()

	user = g.db.query(User).filter(
		User.username.ilike(username),
		User.email.ilike(email)).one_or_none()

	if user:
		now = int(time.time())
		token = generate_hash(f"{user.id}+{now}+forgot+{user.login_nonce}")
		url = f"{SITE_FULL}/reset?id={user.id}&time={now}&token={token}"

		send_mail(to_address=user.email,
				subject="Password Reset Request",
				html=render_template("email/password_reset.html",
									action_url=url,
									v=user)
				)

	return render_template("forgot_password.html",
						msg="If the username and email matches an account, you will be sent a password reset email. You have ten minutes to complete the password reset process.")


@app.get("/reset")
def get_reset():

	user_id = request.values.get("id")

	timestamp = int(request.values.get("time",0))
	token = request.values.get("token")

	now = int(time.time())

	if now - timestamp > 600:
		return render_template("message.html", 
			title="Password reset link expired",
			error="This password reset link has expired.")

	user = get_account(user_id)
	
	if not user: abort(400)

	if not validate_hash(f"{user_id}+{timestamp}+forgot+{user.login_nonce}", token):
		abort(400)

	if not user:
		abort(404)

	reset_token = generate_hash(f"{user.id}+{timestamp}+reset+{user.login_nonce}")

	return render_template("reset_password.html",
						v=user,
						token=reset_token,
						time=timestamp,
						)


@app.post("/reset")
@limiter.limit("1/second;30/minute;200/hour;1000/day")
@auth_desired
def post_reset(v):
	if v: return redirect('/')

	user_id = request.values.get("user_id")

	timestamp = int(request.values.get("time"))
	token = request.values.get("token")

	password = request.values.get("password")
	confirm_password = request.values.get("confirm_password")

	now = int(time.time())

	if now - timestamp > 600:
		return render_template("message.html",
							title="Password reset expired",
							error="This password reset form has expired.")

	user = get_account(user_id)

	if not validate_hash(f"{user_id}+{timestamp}+reset+{user.login_nonce}", token):
		abort(400)
	if not user:
		abort(404)

	if password != confirm_password:
		return render_template("reset_password.html",
							v=user,
							token=token,
							time=timestamp,
							error="Passwords didn't match.")

	user.passhash = hash_password(password)
	g.db.add(user)


	return render_template("message_success.html",
						title="Password reset successful!",
						message="Login normally to access your account.")

@app.get("/lost_2fa")
@auth_desired
def lost_2fa(v):

	return render_template(
		"lost_2fa.html",
		v=v
		)

@app.post("/request_2fa_disable")
@limiter.limit("1/second;6/minute;200/hour;1000/day")
def request_2fa_disable():

	username=request.values.get("username")
	user=get_user(username, graceful=True)
	if not user or not user.email or not user.mfa_secret:
		return render_template("message.html",
						title="Removal request received",
						message="If username, password, and email match, we will send you an email.")


	email=request.values.get("email").strip().lower()

	if not email_regex.fullmatch(email):
		return render_template("message.html", title="Invalid email.", error="Invalid email.")

	password =request.values.get("password")
	if not user.verifyPass(password):
		return render_template("message.html",
						title="Removal request received",
						message="If username, password, and email match, we will send you an email.")

	valid=int(time.time())
	token=generate_hash(f"{user.id}+{user.username}+disable2fa+{valid}+{user.mfa_secret}+{user.login_nonce}")

	action_url=f"{SITE_FULL}/reset_2fa?id={user.id}&t={valid}&token={token}"
	
	send_mail(to_address=user.email,
			subject="2FA Removal Request",
			html=render_template("email/2fa_remove.html",
								action_url=action_url,
								v=user)
			)

	return render_template("message.html",
						title="Removal request received",
						message="If username, password, and email match, we will send you an email.")

@app.get("/reset_2fa")
def reset_2fa():

	now=int(time.time())
	t = request.values.get("t")
	if not t: abort(400)
	t = int(t)

	if now > t+3600*24:
		return render_template("message.html",
						title="Expired Link",
						error="This link has expired.")

	token=request.values.get("token")
	uid=request.values.get("id")

	user=get_account(uid)

	if not validate_hash(f"{user.id}+{user.username}+disable2fa+{t}+{user.mfa_secret}+{user.login_nonce}", token):
		abort(403)

	user.mfa_secret=None

	g.db.add(user)


	return render_template("message_success.html",
						title="Two-factor authentication removed.",
						message="Login normally to access your account.")