#!/usr/bin/env python3
"""Check for team members who have not sent a message in their channel within 36 hours.

Scans each team's Discord channel and flags members with no recent activity.
Optionally sends a direct mention message to inactive members.

Data files (place in data/):
  - team_assignments.json  Team rosters with leaders and participants per team

Outputs (written to data/):
  - discord_activity_report.json  Inactive members per team with last-seen timestamps

Env vars:
  - DISCORD_BOT_TOKEN  Bot token for the Discord API
"""

import asyncio
import json
import os
import sys
from datetime import datetime, timedelta, timezone
from pathlib import Path

import aiohttp

DATA_DIR = Path(__file__).parent.parent.parent / "data"

# Configuration
DISCORD_TOKEN = os.environ["DISCORD_BOT_TOKEN"]
DISCORD_API_BASE = "https://discord.com/api/v10"
INACTIVE_THRESHOLD_HOURS = 36

# Load team assignments from file
with open(DATA_DIR / "team_assignments.json") as f:
    team_data = json.load(f)

# Build TEAMS dictionary with channel IDs and member lists
TEAMS = {}
CHANNEL_IDS = {
    "Jade Jasmine": "1464316501573107886",
    "Crimson Dahlia": "1464316744909852682",
    "Rose Camellia": "1464316751268286611",
    "Amber Wisteria": "1464316761410113641",
    "Ivory Orchid": "1464316770889240730",
    "Teal Iris": "1464316776459407448",
    "Peach Gardenia": "1464316785040953543",
    "Violet Carnation": "1464316805261824032",
    "Azure Lotus": "1464316814455472139",
    "Coral Sunflower": "1464316819711066263",
    "Indigo Tulip": "1464316826384072925",
    "Scarlet Hydrangea": "1464316839306985506",
    "Mint Narcissus": "1464316844251807952",
    "Sage Marigold": "1464316850669093040",
}

for team in team_data:
    team_name = team["name"]
    if team_name in CHANNEL_IDS:
        TEAMS[team_name] = {
            "channel_id": CHANNEL_IDS[team_name],
            "member_ids": team["leaders"] + team["participants"],
        }


class DiscordActivityChecker:
    def __init__(self, token: str):
        self.token = token
        self.headers = {
            "Authorization": f"Bot {token}",
            "Content-Type": "application/json",
        }
        self.session = None
        self.cutoff_time = datetime.now(timezone.utc) - timedelta(
            hours=INACTIVE_THRESHOLD_HOURS
        )

    async def __aenter__(self):
        self.session = aiohttp.ClientSession()
        return self

    async def __aexit__(self, exc_type, exc_val, exc_tb):
        if self.session:
            await self.session.close()

    async def get_user_info(self, user_id: str) -> dict:
        """Get information about a specific user"""
        url = f"{DISCORD_API_BASE}/users/{user_id}"

        async with self.session.get(url, headers=self.headers) as response:
            if response.status == 429:
                # Rate limited, wait a bit
                await asyncio.sleep(1)
                return None
            elif response.status != 200:
                print(f"Failed to get user {user_id}: {response.status}")
                return None

            user_data = await response.json()
            return user_data

    async def get_recent_message_authors(self, channel_id: str) -> set[str]:
        """Get user IDs of everyone who sent a message in the last 36 hours"""
        url = f"{DISCORD_API_BASE}/channels/{channel_id}/messages?limit=100"
        active_users = set()

        async with self.session.get(url, headers=self.headers) as response:
            if response.status != 200:
                print(
                    f"Failed to get messages for channel {channel_id}: "
                    f"{response.status}"
                )
                return active_users

            messages = await response.json()

            for message in messages:
                # Parse message timestamp
                timestamp = datetime.fromisoformat(
                    message["timestamp"].replace("Z", "+00:00")
                )

                # If message is within our threshold, add the author
                if timestamp > self.cutoff_time:
                    active_users.add(message["author"]["id"])
                else:
                    # Messages are returned newest first, so we can break early
                    break

        return active_users

    async def send_message_to_channel(self, channel_id: str, content: str) -> bool:
        """Send a message to a Discord channel"""
        url = f"{DISCORD_API_BASE}/channels/{channel_id}/messages"
        data = {"content": content}

        async with self.session.post(url, headers=self.headers, json=data) as response:
            if response.status == 200:
                print(f"✅ Message sent to channel {channel_id}")
                return True
            else:
                print(
                    f"❌ Failed to send message to channel {channel_id}: "
                    f"{response.status}"
                )
                return False

    async def check_team_activity(
        self, team_name: str, channel_id: str, member_ids: list[str]
    ) -> dict:
        """Check activity for a specific team"""
        print(f"Checking {team_name}...")

        # Get active users in the channel
        active_users = await self.get_recent_message_authors(channel_id)

        # Find inactive members
        inactive_members = []
        total_members = len(member_ids)

        for member_id in member_ids:
            if member_id not in active_users:
                # Get user information
                user_info = await self.get_user_info(member_id)
                if user_info:
                    # Skip bots
                    if user_info.get("bot", False):
                        total_members -= 1
                        continue

                    inactive_members.append(
                        {"id": member_id, "mention": f"<@{member_id}>"}
                    )
                else:
                    # If we can't get user info, still track them as inactive
                    inactive_members.append(
                        {"id": member_id, "mention": f"<@{member_id}>"}
                    )

        return {
            "team": team_name,
            "total_members": total_members,
            "inactive_members": inactive_members,
            "inactive_count": len(inactive_members),
        }


async def main():
    """Main function to check all teams"""
    print(
        f"Discord Activity Checker - Checking for inactivity over "
        f"{INACTIVE_THRESHOLD_HOURS} hours"
    )
    cutoff = datetime.now(timezone.utc) - timedelta(hours=INACTIVE_THRESHOLD_HOURS)
    print(f"Cutoff time: {cutoff}")
    print("-" * 80)

    async with DiscordActivityChecker(DISCORD_TOKEN) as checker:
        results = []

        for team_name, team_info in TEAMS.items():
            channel_id = team_info["channel_id"]
            member_ids = team_info["member_ids"]

            result = await checker.check_team_activity(
                team_name, channel_id, member_ids
            )
            results.append(result)

        # Display results
        print("\n" + "=" * 80)
        print("INACTIVE MEMBERS REPORT")
        print("=" * 80)

        # Check if user wants to send messages (via command line arg)
        send_messages = "--send" in sys.argv

        for team_result in results:
            print(f"\n📋 {team_result['team']}")
            print(f"   Total Members: {team_result['total_members']}")
            print(f"   Inactive: {team_result['inactive_count']}")

            if team_result["inactive_members"]:
                print("   Inactive Members:")
                for member in team_result["inactive_members"]:
                    print(f"     - {member['mention']}")

                # Send message to team channel if requested
                if send_messages and team_result["inactive_count"] > 0:
                    channel_id = TEAMS[team_result["team"]]["channel_id"]

                    # Build message
                    mentions = "\n".join(
                        [m["mention"] for m in team_result["inactive_members"]]
                    )
                    message = (
                        "Good morning, the following people have not sent a "
                        "message here in the last 36 hours. If you are on this "
                        "list, please confirm you are still participating.\n\n"
                        f"{mentions}"
                    )

                    await checker.send_message_to_channel(channel_id, message)
                    await asyncio.sleep(1)  # Small delay between messages
            else:
                print("   ✅ All members are active!")

        print("\n" + "=" * 80)

        # Save results to JSON
        with open(DATA_DIR / "discord_activity_report.json", "w") as f:
            json.dump(
                {
                    "generated_at": datetime.now(timezone.utc).isoformat(),
                    "threshold_hours": INACTIVE_THRESHOLD_HOURS,
                    "results": results,
                },
                f,
                indent=2,
            )

        print("\n📄 Detailed report saved to discord_activity_report.json")


if __name__ == "__main__":
    asyncio.run(main())