from datetime import datetime
import requests
from bs4 import BeautifulSoup
from mastodon import Mastodon
import sqlite3
from typing import List
from typing import Optional
from sqlalchemy import ForeignKey, select
from sqlalchemy import String
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import Session
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import relationship
from sqlalchemy.exc import NoResultFound
from sqlalchemy import create_engine

post_datetime_format = "%b %e %l:%M %p"

scl_events_url = "https://utilisocial.io/datacapable/v2/p/scl/map/events"
scl_events_response = requests.get(scl_events_url)
try:
    scl_events = scl_events_response.json()
except requests.JSONDecodeError:
    print("JSON could not be loaded from SCL API")
    raise

mastodon = Mastodon(access_token="scl_bot_mastodon.secret")


class Base(DeclarativeBase):
    pass


class SclOutage(Base):
    __tablename__ = "scl_outages"
    scl_outage_id: Mapped[int] = mapped_column(primary_key=True, unique=True)
    outage_user_id: Mapped[str] = mapped_column()
    most_recent_post_id: Mapped[str] = mapped_column()
    last_updated_time: Mapped[datetime] = mapped_column()
    estimated_restoration_time: Mapped[datetime] = mapped_column()
    cause: Mapped[str] = mapped_column()
    outage_size: Mapped[str] = mapped_column()
    status: Mapped[Optional[str]] = mapped_column()
    no_longer_in_response_time: Mapped[
        Optional[datetime]
    ] = (
        mapped_column()
    )  # If the event is no longer being returned in the response, this will be set to the current time

    def __repr__(self) -> str:
        return f"SclOutage(scl_outage_id={self.scl_outage_id!r}, most_recent_post_id={self.most_recent_post_id!r}, last_updated_time={self.last_updated_time!r}, no_longer_in_response_time={self.no_longer_in_response_time!r})"


engine = create_engine("sqlite:///scl.db")
Base.metadata.create_all(engine)

with Session(engine) as session:
    for event in scl_events:
        print("Processing outage with Internal ID {}".format(event["id"]))
        start_time = datetime.fromtimestamp(event["startTime"] / 1000)
        last_updated_time = datetime.fromtimestamp(event["lastUpdatedTime"] / 1000)
        estimated_restoration_time = datetime.fromtimestamp(event["etrTime"] / 1000)

        lookup_statement = select(SclOutage).where(
            SclOutage.scl_outage_id == event["id"]
        )
        lookup_result = session.scalars(lookup_statement)
        if event["numPeople"] < 250:
            outage_size = "Small"
        elif event["numPeople"] < 1000:
            outage_size = "Medium"
        else:
            outage_size = "Large"

        if "status" in event:
            status = event["status"]
        else:
            status = None

        hashtag_string = "#SeattleCityLightOutage #SCLOutage #SCLOutage{}".format(
            event["identifier"]
        )

        try:
            existing_record = lookup_result.one()
            updated_properties = []
            updated_entries = []
            if estimated_restoration_time != existing_record.estimated_restoration_time:
                existing_record.estimated_restoration_time = estimated_restoration_time
                updated_properties.append("estimated restoration")
                updated_entries.append(
                    "Est. Restoration: {}".format(
                        estimated_restoration_time.strftime(post_datetime_format)
                    )
                )
            if event["cause"] != existing_record.cause:
                existing_record.cause = event["cause"]
                updated_properties.append("cause")
                updated_entries.append("Cause: {}".format(event["cause"]))
            if outage_size != existing_record.outage_size:
                existing_record.outage_size = outage_size
                updated_properties.append("outage size")
                updated_entries.append("Outage Size: {}".format(outage_size))
            if status != existing_record.status:
                existing_record.status = status
                updated_properties.append("status")
                updated_entries.append("Status: {}".format(status))

            if updated_properties:
                updated_properties.sort()
                updated_entries.sort()
                if len(updated_properties) == 1:
                    updated_entries.insert(
                        0,
                        "The {} of this outage has been updated.\n".format(
                            updated_properties[0]
                        ),
                    )
                else:
                    # TODO: this currently just smashes all of the properties together with commas, it'd be nice to make it actually format it like a sentence
                    updated_entries.insert(
                        0,
                        "The {} of this outage have been updated.\n".format(
                            ", ".join(updated_properties)
                        ),
                    )
                updated_entries.append("")
                updated_entries.append(hashtag_string)
                mastodon_post_result = mastodon.status_post(
                    status="\n".join(updated_entries),
                    in_reply_to_id=existing_record.most_recent_post_id,
                    visibility="public",
                )
                existing_record.most_recent_post_id = mastodon_post_result["id"]

                session.commit()

        except NoResultFound:
            # TODO: Logic to post initial to Mastodon,
            print("Existing record not found")
            post_text = """Seattle City Light is reporting a {} outage in {}.

Start Date: {}
Est. Restoration: {}
Cause: {}

{}""".format(
                outage_size.lower(),
                event["city"],
                start_time.strftime(post_datetime_format),
                estimated_restoration_time.strftime(post_datetime_format),
                event["cause"],
                hashtag_string,
            )

            mastodon_post_result = mastodon.status_post(
                status=post_text,
                visibility="public",
            )

            new_outage_record = SclOutage(
                scl_outage_id=event["id"],
                outage_user_id=event["identifier"],
                most_recent_post_id=mastodon_post_result["id"],
                last_updated_time=last_updated_time,
                estimated_restoration_time=estimated_restoration_time,
                cause=event["cause"],
                status=status,
                outage_size=outage_size,
            )
            session.add(new_outage_record)
            session.commit()

    lookup_active_outages_statement = select(SclOutage).where(
        SclOutage.no_longer_in_response_time == None
    )
    for active_outage in session.scalars(lookup_active_outages_statement):
        if not any(event["id"] == active_outage.scl_outage_id for event in scl_events):
            # Event ID no longer exists in response
            mastodon_post_result = mastodon.status_post(
                status="This outage is reported to be resolved.\n\n#SeattleCityLightOutage #SCLOutage #SCLOutage{}".format(
                    active_outage.outage_user_id
                ),
                in_reply_to_id=active_outage.most_recent_post_id,
                visibility="public",
            )

            active_outage.most_recent_post_id = mastodon_post_result["id"]
            active_outage.no_longer_in_response_time = datetime.now()
            session.commit()