"""ActivityPub actor endpoints: profiles, outbox, inbox.

Ported from ~/art-dag/activity-pub/app/routers/users.py.
"""
from __future__ import annotations

import json
import os

from quart import Blueprint, request, abort, Response, g, render_template

from shared.services.registry import services
from shared.models.federation import APInboxItem


def _domain() -> str:
    return os.getenv("AP_DOMAIN", "rose-ash.com")


def register(url_prefix="/users"):
    bp = Blueprint("actors", __name__, url_prefix=url_prefix)

    @bp.get("/<username>")
    async def profile(username: str):
        actor = await services.federation.get_actor_by_username(g.s, username)
        if not actor:
            abort(404)

        domain = _domain()
        accept = request.headers.get("accept", "")

        # AP JSON-LD response
        if "application/activity+json" in accept or "application/ld+json" in accept:
            actor_json = {
                "@context": [
                    "https://www.w3.org/ns/activitystreams",
                    "https://w3id.org/security/v1",
                ],
                "type": "Person",
                "id": f"https://{domain}/users/{username}",
                "name": actor.display_name or username,
                "preferredUsername": username,
                "summary": actor.summary or "",
                "inbox": f"https://{domain}/users/{username}/inbox",
                "outbox": f"https://{domain}/users/{username}/outbox",
                "followers": f"https://{domain}/users/{username}/followers",
                "following": f"https://{domain}/users/{username}/following",
                "publicKey": {
                    "id": f"https://{domain}/users/{username}#main-key",
                    "owner": f"https://{domain}/users/{username}",
                    "publicKeyPem": actor.public_key_pem,
                },
                "url": f"https://{domain}/users/{username}",
            }
            return Response(
                response=json.dumps(actor_json),
                content_type="application/activity+json",
            )

        # HTML profile page
        activities, total = await services.federation.get_outbox(
            g.s, username, page=1, per_page=20,
        )
        return await render_template(
            "federation/profile.html",
            actor=actor,
            activities=activities,
            total=total,
        )

    @bp.get("/<username>/outbox")
    async def outbox(username: str):
        actor = await services.federation.get_actor_by_username(g.s, username)
        if not actor:
            abort(404)

        domain = _domain()
        actor_id = f"https://{domain}/users/{username}"
        page_param = request.args.get("page")

        if not page_param:
            _, total = await services.federation.get_outbox(g.s, username, page=1, per_page=1)
            return Response(
                response=json.dumps({
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "OrderedCollection",
                    "id": f"{actor_id}/outbox",
                    "totalItems": total,
                    "first": f"{actor_id}/outbox?page=1",
                }),
                content_type="application/activity+json",
            )

        page_num = int(page_param)
        activities, total = await services.federation.get_outbox(
            g.s, username, page=page_num, per_page=20,
        )

        items = []
        for a in activities:
            items.append({
                "@context": "https://www.w3.org/ns/activitystreams",
                "type": a.activity_type,
                "id": a.activity_id,
                "actor": actor_id,
                "published": a.published.isoformat() if a.published else None,
                "object": {
                    "type": a.object_type,
                    **(a.object_data or {}),
                },
            })

        return Response(
            response=json.dumps({
                "@context": "https://www.w3.org/ns/activitystreams",
                "type": "OrderedCollectionPage",
                "id": f"{actor_id}/outbox?page={page_num}",
                "partOf": f"{actor_id}/outbox",
                "totalItems": total,
                "orderedItems": items,
            }),
            content_type="application/activity+json",
        )

    @bp.post("/<username>/inbox")
    async def inbox(username: str):
        actor = await services.federation.get_actor_by_username(g.s, username)
        if not actor:
            abort(404)

        body = await request.get_json()
        if not body:
            abort(400, "Invalid JSON")

        # Store raw inbox item for async processing
        from shared.models.federation import ActorProfile
        from sqlalchemy import select
        actor_row = (
            await g.s.execute(
                select(ActorProfile).where(
                    ActorProfile.preferred_username == username
                )
            )
        ).scalar_one()

        item = APInboxItem(
            actor_profile_id=actor_row.id,
            raw_json=body,
            activity_type=body.get("type"),
            from_actor=body.get("actor"),
        )
        g.s.add(item)
        await g.s.flush()

        # Emit domain event for processing
        from shared.events import emit_event
        await emit_event(
            g.s,
            "federation.inbox_received",
            "APInboxItem",
            item.id,
            {
                "actor_username": username,
                "activity_type": body.get("type"),
                "from_actor": body.get("actor"),
            },
        )

        return Response(status=202)

    @bp.get("/<username>/followers")
    async def followers(username: str):
        actor = await services.federation.get_actor_by_username(g.s, username)
        if not actor:
            abort(404)

        domain = _domain()
        follower_list = await services.federation.get_followers(g.s, username)

        return Response(
            response=json.dumps({
                "@context": "https://www.w3.org/ns/activitystreams",
                "type": "OrderedCollection",
                "id": f"https://{domain}/users/{username}/followers",
                "totalItems": len(follower_list),
                "orderedItems": [f.follower_actor_url for f in follower_list],
            }),
            content_type="application/activity+json",
        )

    @bp.get("/<username>/following")
    async def following(username: str):
        actor = await services.federation.get_actor_by_username(g.s, username)
        if not actor:
            abort(404)

        domain = _domain()
        return Response(
            response=json.dumps({
                "@context": "https://www.w3.org/ns/activitystreams",
                "type": "OrderedCollection",
                "id": f"https://{domain}/users/{username}/following",
                "totalItems": 0,
                "orderedItems": [],
            }),
            content_type="application/activity+json",
        )

    return bp