#!/usr/bin/env python3
from backend import CalibreDB
from flask import (
    Flask,
    jsonify,
    send_from_directory,
    send_file,
    render_template,
    request,
)
from flask_cors import CORS
from werkzeug.routing import BaseConverter
import os


def send_from_cwd(filename):
    return send_from_directory(os.getcwd(), filename)


def send_file_with_etag(fp, etag, **kwargs):
    if request.if_none_match and etag in request.if_none_match:
        return "", 304

    response = send_file(fp, **kwargs)
    response.set_etag(etag)
    fp.seek(0)
    return response


def send_image(image):
    return send_file_with_etag(
        image["buffer"], image["etag"], mimetype=image["mimetype"]
    )


app = Flask(
    __name__, static_folder="frontend/dist/static", template_folder="frontend/dist"
)
app.config["SEND_FILE_MAX_AGE_DEFAULT"] = 604800  # 1 week
CORS(app)

db = CalibreDB()

# kind of redundant, but avoids returning 200 if page does not exist
@app.route("/")
@app.route("/series/<id>")
@app.route("/volume/<id>")
def serve_app(**kwargs):
    return render_template("index.html")


@app.route("/api/series")
def get_series_list():
    return jsonify(list(db.get_series_list()))


@app.route("/api/series/<int:series_id>/cover")
def get_series_cover(series_id):
    return send_from_cwd(db.get_series_cover(series_id))


@app.route("/api/series/<int:series_id>/cover/thumbnail")
def get_series_cover_thumbnail(series_id):
    thumbnail = db.get_series_cover_thumbnail(series_id)
    return send_image(thumbnail)


@app.route("/api/series/<int:series_id>")
def get_series_info(series_id):
    return jsonify(db.get_series_volumes(series_id))


@app.route("/api/volume/<int:volume_id>/cover")
def get_volume_cover(volume_id):
    return send_from_cwd(db.get_volume_cover(volume_id))


@app.route("/api/volume/<int:volume_id>/cover/thumbnail")
def get_volume_cover_thumbnail(volume_id):
    thumbnail = db.get_volume_cover_thumbnail(volume_id)
    return send_image(thumbnail)


@app.route("/api/volume/<int:volume_id>")
def get_volume_info(volume_id):
    return jsonify(db.get_volume_info(volume_id))


@app.route("/api/volume/<int:volume_id>/page/<int:page_number>")
def get_volume_page(volume_id, page_number):
    page = db.get_volume_page(volume_id, page_number)
    return send_image(page)


@app.route("/api/volume/<int:volume_id>/page/<int:page_number>/original")
def get_volume_page_original(volume_id, page_number):
    page = db.get_volume_page(volume_id, page_number, original=True)
    return send_image(page)


if __name__ == "__main__":
    app.run(host="0.0.0.0")