from flask import Flask, render_template, redirect, request, g, flash
import secrets
import json

from book import Book
import isbn_db

app = Flask(__name__)

app.config["DATABASE"] = "data/books.sqlite"
app.config["SECRET_KEY"] = secrets.token_hex()

@app.route("/submit-isbn")
def submit_isbn():
    if "isbn" not in request.args:
        return "/submit-isbn?isbn=xxxxxx"

    if request.args["isbn"] == "":
        return "Pas d'ISBN spécifié"

    try:
        book = Book(request.args["isbn"])
    except ValueError:
        return "Pas le bon format de QR code"

    try:
        book.load()
    except KeyError:
        isbn_db.add_book(book)
        return "Pas trouvé, à rajouter manuellement"

    print("Got ", book)
    if isbn_db.add_book(book) == "duplicate":
        return f"{book.title} ajouté (plusieurs occurrences)"
    return f"{book.title} ajouté"

@app.route("/web-submit-isbn")
def web_submit_isbn():
    flash(submit_isbn())
    return redirect("/")

@app.route("/")
def index():
    return render_template("index.html", books=isbn_db.get_all_books())


@app.route("/delete-book", methods=["POST"])
def delete_book():
    if "isbn" not in request.form:
        return "missing isbn"

    isbn_db.delete_book(request.form["isbn"])
    return redirect("/")

@app.route("/update-book", methods=["POST"])
def update_book():
    attributes = ["isbn", "count", "title", "author", "publisher", "publish_date"]
    if True in [i not in request.form for i in attributes]:
        return "missing an attribute"
    
    form_data = request.form.copy()

    for attribute in attributes:
        if form_data[attribute] == "None":
            form_data[attribute] = None

    book = Book(form_data["isbn"])
    book._manual_load(
        form_data["title"],
        publisher=form_data["publisher"],
        publish_date=form_data["publish_date"],
        author=form_data["author"],
        count=int(form_data["count"])
    )
    isbn_db.update_book(book)
    return redirect("/")

@app.route("/export-csv")
def export_csv():
    books = isbn_db.get_all_books()

    csv = "ISBN;Titre;Auteur;Éditeur;Date;Nombre\n"
    for book in books:
        csv += f"{book.isbn};{book.title};{book.author};{book.publisher};{book.publish_date};{book.count}\n"

    # return as file with a good filename
    return app.response_class(
        csv,
        mimetype="text/csv",
        headers={"Content-Disposition": "attachment;filename=books.csv"}
    )

@app.after_request
def after_request(response):
    """Automatically close db after each request"""
    if ('db' in g) and (g.db is not None):
        g.db.close()
    return response