from flask import Flask, url_for
from markupsafe import escape

app = Flask(__name__)


# using plain routes
# https://flask.palletsprojects.com/en/2.0.x/quickstart/#variable-rules
# -------------------------------------------------------------------------------
@app.route("/")
def index():
    return "Index Page"


@app.route("/hello")
def hello():
    return "Hello, World"


# returning JSON (dictionary and objects)
# -------------------------------------------------------------------------------
# can be done with a python dictionary object
@app.route("/me")
def me_api():
    return {
        "username": "bob",
        "theme": "black",
        "image": "user_image.png",
    }


# or with `jsonify` function
from flask import jsonify


@app.route("/users")
def users_api():
    users = get_all_users()
    return jsonify([user.to_json() for user in users])


# using routes with variables
# https://flask.palletsprojects.com/en/2.0.x/quickstart/#variable-rules
# -------------------------------------------------------------------------------
@app.route("/user/<username>")
def show_user_profile(username):
    # show the user profile for that user
    return f"User {escape(username)}"


@app.route("/post/<int:post_id>")
def show_post(post_id):
    # show the post with the given id, the id is an integer
    return f"Post {post_id}"


@app.route("/path/<path:subpath>")
def show_subpath(subpath):
    # show the subpath after /path/
    return f"Subpath {escape(subpath)}"


def using_url_for():
    print(url_for("index"))


# processing HTTP methods
# https://flask.palletsprojects.com/en/2.0.x/quickstart/#http-methods
# -------------------------------------------------------------------------------
from flask import request


def do_the_login():
    pass


def show_the_login_form():
    pass


@app.route("/login", methods=["GET", "POST"])
def login():
    if request.method == "POST":
        return do_the_login()
    else:
        return show_the_login_form()


# basic file uploads
# https://flask.palletsprojects.com/en/2.0.x/quickstart/#file-uploads
# -------------------------------------------------------------------------------
from flask import request


@app.route("/upload", methods=["GET", "POST"])
def upload_file():
    if request.method == "POST":
        f = request.files["the_file"]
        f.save("/var/www/uploads/uploaded_file.txt")


# vim:ft=python