"""Front-facing API the website talks to.

The browser:
  - opens a WebSocket to /events to receive live chat events from every profile
    (each event is tagged with the originating profile name);
  - uses REST to spawn/stop profiles and to send commands to cli profiles.

This process sits between the website and the SimpleX binaries; it is the only
thing that touches the binaries. Run: uvicorn supervisor.server:app
"""

import contextlib
from pathlib import Path

from fastapi import FastAPI, WebSocket, WebSocketDisconnect
from fastapi.responses import FileResponse, JSONResponse

from .supervisor import Supervisor

app = FastAPI(title="SimpleX Orchestrate")

WEBUI = Path(__file__).resolve().parent.parent / "webui" / "index.html"


@app.get("/")
async def index() -> FileResponse:
    return FileResponse(WEBUI)

_browser_clients: set[WebSocket] = set()


async def _broadcast(name: str, event: dict) -> None:
    dead = []
    for ws in _browser_clients:
        try:
            await ws.send_json({"profile": name, "event": event})
        except Exception:
            dead.append(ws)
    for ws in dead:
        _browser_clients.discard(ws)


sup = Supervisor(on_event=_broadcast)


@app.on_event("shutdown")
async def _shutdown() -> None:
    await sup.stop_all()


# ── Control (REST) ──────────────────────────────────────────────────────────────
@app.get("/profiles")
async def profiles() -> dict:
    return {"profiles": sup.list()}


@app.post("/profiles/{name}/start-cli")
async def start_cli(name: str) -> dict:
    await sup.start_cli(name)
    return {"ok": True}


@app.post("/profiles/{name}/start-directory")
async def start_directory(name: str, body: dict) -> dict:
    await sup.start_directory(name, body["super_users"], body["web_folder"])
    return {"ok": True}


@app.post("/profiles/{name}/start-broadcast")
async def start_broadcast(name: str, body: dict) -> dict:
    await sup.start_broadcast(name, body["display_name"], body["publishers"])
    return {"ok": True}


@app.post("/profiles/{name}/cmd")
async def cmd(name: str, body: dict) -> dict:
    """Send a raw chat command string to a cli profile (e.g. '/_send @1 text hi')."""
    return {"resp": await sup.send(name, body["cmd"])}


# ── High-level profile operations (normalized for the GUI) ───────────────────────
async def _json(coro):
    """Await a helper coroutine; return its result as JSON, or {error} on failure."""
    try:
        return JSONResponse(await coro)
    except Exception as e:
        return JSONResponse({"error": str(e)}, status_code=400)


@app.get("/profiles/{name}/profile")
async def get_profile(name: str):
    return await _json(sup.get_profile(name))


@app.post("/profiles/{name}/profile")
async def set_profile(name: str, body: dict):
    async def do():
        await sup.update_profile(name, body.get("display_name", name),
                                 body.get("full_name", ""), body.get("bio", ""))
        return {"ok": True}
    return await _json(do())


@app.get("/profiles/{name}/contacts")
async def contacts(name: str):
    return await _json(sup.get_contacts(name))


@app.get("/profiles/{name}/groups")
async def groups(name: str):
    return await _json(sup.get_groups(name))


@app.post("/profiles/{name}/groups")
async def create_group(name: str, body: dict):
    return await _json(sup.create_group(name, body["name"], bool(body.get("observer"))))


@app.get("/profiles/{name}/groups/{gid}/link")
async def group_link(name: str, gid: int):
    async def do():
        return {"link": await sup.group_link(name, gid)}
    return await _json(do())


@app.post("/profiles/{name}/groups/{gid}/leave")
async def leave_group(name: str, gid: int):
    async def do():
        await sup.leave_group(name, gid); return {"ok": True}
    return await _json(do())


@app.post("/profiles/{name}/groups/{gid}/join")
async def join_group(name: str, gid: int):
    async def do():
        await sup.join_group(name, gid); return {"ok": True}
    return await _json(do())


@app.delete("/profiles/{name}/groups/{gid}")
async def delete_group(name: str, gid: int):
    async def do():
        await sup.delete_group(name, gid); return {"ok": True}
    return await _json(do())


@app.get("/profiles/{name}/chat/{chat_type}/{chat_id}/history")
async def history(name: str, chat_type: str, chat_id: int, count: int = 50):
    async def do():
        return {"messages": await sup.get_history(name, chat_type, chat_id, count)}
    return await _json(do())


@app.post("/profiles/{name}/chat/{chat_type}/{chat_id}/send")
async def chat_send(name: str, chat_type: str, chat_id: int, body: dict):
    async def do():
        await sup.send_message(name, chat_type, chat_id, body["text"]); return {"ok": True}
    return await _json(do())


@app.post("/profiles/{name}/chat/{chat_type}/{chat_id}/clear")
async def chat_clear(name: str, chat_type: str, chat_id: int):
    async def do():
        await sup.clear_chat(name, chat_type, chat_id); return {"ok": True}
    return await _json(do())


@app.delete("/profiles/{name}/contacts/{contact_id}")
async def contact_delete(name: str, contact_id: int):
    async def do():
        await sup.delete_contact(name, contact_id); return {"ok": True}
    return await _json(do())


@app.post("/profiles/{name}/stop")
async def stop(name: str) -> dict:
    await sup.stop(name)
    return {"ok": True}


# ── Live events (WebSocket) ──────────────────────────────────────────────────────
@app.websocket("/events")
async def events(ws: WebSocket) -> None:
    await ws.accept()
    _browser_clients.add(ws)
    try:
        while True:
            await ws.receive_text()  # keep the socket open; ignore inbound
    except WebSocketDisconnect:
        pass
    finally:
        _browser_clients.discard(ws)