"""
Post today's menu to Slack.

This is done by parsing the JSON data from SharePoint.
"""

import datetime
import json
import os
import sys
import random
from urllib import error, parse, request

import browser_cookie3
import requests


# Load configuration.
try:
    IS_LIVE = bool(os.environ.get("IS_LIVE"))
    SLACK_ERROR_HOOK = os.environ["SLACK_ERROR_HOOK"]
    SLACK_SUCCESS_HOOK = (
        os.environ["SLACK_SUCCESS_HOOK"] if IS_LIVE else SLACK_ERROR_HOOK
    )
    SHAREPOINT_URL = os.environ["SHAREPOINT_URL"]
    MENU_URL = os.environ["MENU_URL"]
except KeyError as e:
    sys.stderr.write(f"Unable to load configuration for {e}.\n")
    sys.exit(1)
sys.stdout.write("Configuration loaded.\n")


# Set up and execute request to SharePoint.
cookies = browser_cookie3.firefox(
    domain_name="sharepoint.com"
)
headers = {
    "Accept": "application/json;odata=verbose",
    "Content-Type": "application/json;odata=verbose",
}
request_data = {
   "parameters": {
        "__metadata": {
            "type": "SP.RenderListDataParameters"
        },
        "AddRequiredFields": True,
        "AllowMultipleValueFilterForTaxonomyFields": True,
        "FilterOutChannelFoldersInDefaultDocLib": True,
        "RenderOptions": 5707271,
    }
}
response = requests.post(
    SHAREPOINT_URL,
    headers=headers,
    cookies=cookies,
    json=request_data,
)
data = response.json()
sys.stdout.write("Data retrieved from SharePoint.\n")

# Extract today's menu from the SharePoint data.
today = datetime.date.today().strftime("%d-%m-%Y")
menu = None
if "error" in data:
    message = plain_message = f"Error: {data['error']['message']['value']}"
    hook_url = SLACK_ERROR_HOOK
    sys.stderr.write(f"SharePoint {message}\n")
else:
    hook_url = SLACK_SUCCESS_HOOK
    for entry in data["ListData"]["Row"]:
        if entry.get("DAto") == today:
            menu = entry
            break

    if menu is None:
        sys.stderr.write("Unable to find the menu of today :(\n")
        sys.exit(1)
    menu = menu["Menutekst"]
    sys.stdout.write(f"The menu of today ({today}) is: {menu}\n")

    # Determine appropriate emojis for the menu.
    emojis = []
    for emoji, keywords in {
        "flag-in": ["indisk", "indien"],
        "hamburger": ["burger"],
        "fish": ["fisk", "laks", "rødspætte", "sej "],
        "shrimp": ["reje"],
        "pig2": ["skinke", "gris"],
        "cow": ["hakkebøf"],
        "cow2": ["kalv", "okse"],
        "chicken": ["kylling", "chicken"],
        "turkey": ["kalkun"],
        "rabbit2": [" hare"],
        "rooster": ["coq au vin"],
        "falafel": ["falafel"],
        "hot_pepper": ["chili", "hot sauce"],
        "onion": ["løg"],
        "mango": ["mango"],
        "mushroom": ["svampe", "kantarel", "champignon"],
        "beans": ["bønne"],
        "sandwich": ["sandwich"],
        "stuffed_flatbread": ["pita"],
        "pie": ["tærte"],
        "hotdog": ["hotdog"],
        "wine_glass": ["coq au vin"],
        "bowl_with_spoon": ["suppe"],
        "stew": ["gryde", "gullasch"],
        "rice": [" ris", "ris "],
        "ramen": ["nudler"],
        "cloud": ["sky"],
        "potato": ["kartoffel", "kartofler"],
        "apple": ["æble"],
        "baguette_bread": ["flute"],
        "flag-dk": ["tillykke", "fødselsdag"],
        "wave": ["farvel"],
        "gift_heart": ["valentines"],
    }.items():
        for keyword in keywords:
            if keyword in menu.lower():
                emojis.append(emoji)
                break
    if emojis:
        emojis = f":{': :'.join(emojis)}:"
        sys.stdout.write(f"Emojis determined: {emojis}\n")
    else:
        emojis = ""
        sys.stdout.write("No emojis determined.\n")

    # Pick an introduction for the menu.
    introduction = random.choice([
        "Dagens menu er",
        "I dag forkæler kantinen os med",
        "Du kan godt glæde dig til senere! For vi skal have",
        "Der bliver knoklet i køkkenet for at blive klar til at servere",
        "Klokken 11:30 har kantinen fremtryllet en lækker omgang",
    ])
    sys.stdout.write(f"Introduction picked: {introduction}\n")

    # Compose message for Slack.
    plain_message = f"{introduction} {menu}"
    menu_url = MENU_URL
    message = f"{introduction} {emojis} <{menu_url}|*{menu}*>".strip()

payload = {
    "text": plain_message,
    "blocks": [
        {
            "type": "section",
            "text": {
                "type": "mrkdwn",
                "text": message,
            },
        },
    ],
}

sys.stdout.write("Posting menu to Slack...\n")
hook = request.Request(
    hook_url,
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    response = request.urlopen(hook)
except error.HTTPError as e:
    sys.stderr.write(f"{e}\n")
    sys.exit(1)
sys.stdout.write("Done :)\n")