#!venv/bin/python3

from flask import Flask, render_template, request
from config import DevConfig
from ingredient import Ingredient
from recipe import Recipe
import json


def create_app(test_config=None):
    app = Flask(__name__)
    if test_config is not None:
        app.config.from_object(test_config)
    else:
        app.config.from_object(DevConfig)

    import database
    database.init_app(app)

    @app.route('/', methods=['GET'])
    def index():
        return render_template("index.html")

    @app.route('/debug', methods=['GET'])
    def debug():
        return repr(get_all_recipes())

    @app.route('/rezepte', methods=['GET'])
    def recipes():
        return render_template("recipes.html", recipes=get_all_recipes())

    @app.route('/neues_rezept', methods=['GET'])
    def new_recipe():
        return render_template("new_recipe.html")

    @app.route('/process_recipe', methods=['POST'])
    def process_recipe():
        recipe_name = request.form.get("recipe_name").strip()
        description = request.form.get("description").strip()
        additional_text = request.form.get("additional_text").strip()
        servings = request.form.get("servings").strip()
        ingredients = request.form.getlist("ingredient[]")
        measures = request.form.getlist("measure[]")
        amounts = request.form.getlist("amount[]")
        preparation = request.form.getlist("preparation[]")
        preparation_time = request.form.get("preparation_time")
        contains_meat_or_meat_products = request.form.get("contains_meat_or_meatproducts") is not None
        contains_fish = request.form.get("contains_fish") is not None
        contains_animal_products = request.form.get("contains_animal_products") is not None
        source = request.form.get("source").strip()
        if recipe_name is None or servings is None \
                or len(ingredients) == 0 or len(amounts) == 0 or len(measures) == 0 \
                or len(ingredients) != len(amounts) != len(measures) \
                or len(preparation) == 0:
            # TODO: error
            return "error"
        amounts, measures, ingredients, preparation = sanitize_lists(amounts, measures, ingredients, preparation)
        if len(measures) == 0 or len(amounts) == 0 or len(ingredients) == 0 or len(preparation) == 0:
            # TODO: error
            return "error after sanitizing"
        merged_ingredients = merge_ingredients(amounts, measures, ingredients)
        merged_ingredients_json = json.dumps([o.__dict__ for o in merged_ingredients])
        preparation_json = json.dumps(preparation)
        db = database.get_db()
        # TODO: Injection-safe?
        db.execute("""INSERT INTO
                    recipes(name, description, additional_text, servings, ingredients, preparation,
                    preparation_time, contains_meat_or_meat_products, contains_fish,
                    contains_animal_products, source)
                   VALUES (?,?,?,?,?,?,?,?,?,?,?)""",
                   (recipe_name, description, additional_text, servings, merged_ingredients_json,
                    preparation_json, preparation_time, contains_meat_or_meat_products,
                    contains_fish, contains_animal_products, source))
        db.commit()
        database.close_db()
        # TODO: change return value
        return repr(request.form)

    @app.route('/rezept/<int:id>', methods=['GET'])
    def get_recipe(id):
        recipe = get_recipe_object_by_id(id)
        if recipe is not None:
            return render_template("recipe.html", recipe=recipe)
        else:
            return render_template("error.html", error="Das Rezept existiert (noch) nicht.")

    @app.route('/rezept/<int:id>/bearbeiten', methods=['GET'])
    def edit_recipe(id):
      pass

    @app.route('/rezept/<int:id>/process_edit', methods=['POST'])
    def change_recipe(id):
      pass

    return app


def sanitize_lists(amounts, measures, ingredients, preparation):
    for i in range(len(ingredients)-1, -1, -1):
        amounts[i] = amounts[i].strip()
        measures[i] = measures[i].strip()
        ingredients[i] = ingredients[i].strip()
        if amounts[i] == "" and measures[i] == "" and ingredients[i] == "":
            del amounts[i]
            del measures[i]
            del ingredients[i]
    for i in range(len(preparation)-1, -1, -1):
        preparation[i] = preparation[i].strip()
        if preparation[i] == "":
            del preparation[i]
    return amounts, measures, ingredients, preparation


def merge_ingredients(amounts, measures, ingredients):
    merged_ingredients = []
    for i in range(len(ingredients)):
        merged_ingredients.append(Ingredient(amounts[i], measures[i], ingredients[i]))
    return merged_ingredients


def get_all_recipes():
    import database
    db = database.get_db()
    answer = db.execute("SELECT * FROM recipes")
    recipes = answer.fetchall()
    database.close_db()
    return recipes


def get_recipe_object_by_id(id):
    import database
    db = database.get_db()
    # TODO: injection safe?
    print("trying to query recipe with id: " + str(id))
    answer = db.execute("SELECT * FROM recipes WHERE id=?", (str(id)))
    recipe = answer.fetchone()
    database.close_db()
    if recipe is None:
        return None
    return Recipe(recipe['name'],
                  recipe['description'],
                  recipe['additional_text'],
                  recipe['servings'],
                  recipe['ingredients'],
                  recipe['preparation'],
                  recipe['preparation_time'],
                  recipe['upvotes'],
                  recipe['downvotes'],
                  recipe['contains_meat_or_meat_products'],
                  recipe['contains_fish'],
                  recipe['contains_animal_products'],
                  recipe['enhancements'],
                  recipe['source'])


if __name__ == '__main__':
    redab_app = create_app()
    redab_app.run()