import os
from flask import g, make_response, request, send_file
from functools import wraps

from ki.auth import auth
from ki.models import Language, Skill, Token, User
from app import app


def token_auth(func):
    @wraps(func)
    def _token_auth(*args, **kwargs):
        auth_header = request.headers.get("Authorization")

        if (auth_header is None):
            return make_response({}, 401)

        if not auth_header.startswith("Bearer"):
            return make_response({}, 401)

        token = Token.query.filter(Token.token == auth_header[7:]).first()

        if token is None:
            return make_response({}, 403)

        g.user = token.user

        return func(*args, **kwargs)

    return _token_auth


def models_to_list(models):
    models_list = []

    for model in models:
        models_list.append(model.to_dict())

    return models_list


def handle_completion_request(model, key):
    query = model.query

    if "search" in request.args:
        query = query.filter(model.name.startswith(request.args.get("search")))

    results = query.order_by(model.name) \
        .limit(10) \
        .all()

    api_results = models_to_list(results)
    response_data = {}
    response_data[key] = api_results
    return response_data


def handle_icon_request(model, id, path):
    object = model.query.get(id)

    if object is None:
        return make_response({}, 404)

    icon_base_path = path + str(id)
    icon_svg_path = icon_base_path + ".svg"

    if os.path.exists(icon_svg_path):
        return send_file(icon_svg_path, mimetype="image/svg")

    icon_png_path = icon_base_path + ".png"

    if os.path.exists(icon_png_path):
        return send_file(icon_png_path, mimetype="image/png")

    unknown_svg_path = path + "unknown.svg"

    if os.path.exists(unknown_svg_path):
        return send_file(unknown_svg_path, mimetype="image/svg")

    unknown_png_path = path + "unknown.png"

    if os.path.exists(unknown_png_path):
        return send_file(unknown_png_path, mimetype="image/png")

    return make_response({"error": "icon not found"}, 404)


@app.route("/")
def hello_world():
    return "KI"


@app.route("/users/login", methods=["POST"])
def login():
    username = request.json.get("username", "")
    password = request.json.get("password", "")
    token = auth(username, password)

    if token is None:
        return make_response({}, 403)

    return make_response({"token": token.token})


@app.route("/users/<user_id>/profile")
@token_auth
def get_user_profile(user_id):
    user = User.query.filter(User.id == int(user_id)).first()

    if user is None:
        return make_response({}, 404)

    profile = user.profile

    if profile is None:
        return make_response({}, 404)

    return make_response({"profile": profile.to_dict()})


@app.route("/skills")
def get_skills():
    return handle_completion_request(Skill, "skills")


@app.route("/skills/<skill_id>/icon")
def get_skill_icon(skill_id):
    skill_icons_path = app.config["KI_DATA_DIR"] + "/imgs/skill_icons/"
    return handle_icon_request(Skill, skill_id, skill_icons_path)


@app.route("/languages")
def get_languages():
    return handle_completion_request(Language, "languages")


@app.route("/languages/<language_id>/icon")
def get_language_icon(language_id):
    language_flags_path = app.config["KI_DATA_DIR"] + "/imgs/flags/"
    return handle_icon_request(Language, language_id, language_flags_path)