# Copyright 2026 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Artemis Admin & Trace Console Server

Modular entrypoint for full trace inspection, step replay, and task execution management.
"""

import asyncio
import os
from pathlib import Path
import signal
import sys
from types import FrameType

# Bootstrap sys.path to allow running from any CWD
_current_p = Path(__file__).resolve().parent
while _current_p != _current_p.parent:
    if (_current_p / "pyproject.toml").exists() or (_current_p / "artemis").is_dir():
        _workspace_root = _current_p
        break
    _current_p = _current_p.parent
else:
    _workspace_root = Path(__file__).resolve().parent.parent.parent

_apps_dir = _workspace_root / "apps"
_admin_console_dir = _apps_dir / "admin_console"
_cloud_service_dir = _apps_dir / "cloud_service"

for _p in (str(_workspace_root), str(_apps_dir), str(_admin_console_dir), str(_cloud_service_dir)):
    if _p not in sys.path:
        sys.path.insert(0, _p)

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse, HTMLResponse
import uvicorn

from artemis.runtime import (
    DeviceExecutionLock,
    clear_server_info,
    shutdown_awake_service,
    start_awake_service,
    write_server_info,
)

try:
    from admin_console.core.config import (
        DB_PATH,
        IMAGES_DIR,
        REPLAY_BASE_DIR,
        TEST_DATA_DIR,
        TEST_OUTPUTS_DIR,
        TRACES_PATH,
        WORKSPACE_ROOT,
        init_ls_address,
    )
    from admin_console.core.state import ServerState, state
    from admin_console.database.connection import db_session, get_db
    from admin_console.database.repositories.session_repository import session_repo
    from admin_console.database.repositories.step_repository import step_repo
    from admin_console.database.repositories.trace_repository import trace_repo
    from admin_console.routers import media, replay, sessions, steps, stream, system, tasks
    from admin_console.routers.replay import replay_manager
    from admin_console.services.ipc_service import ipc_service
    from admin_console.services.media_service import media_service
    from admin_console.services.model_service import model_service
    from admin_console.services.task_queue_service import task_queue_service
except ImportError:
    from apps.admin_console.core.config import (
        init_ls_address,
    )
    from apps.admin_console.core.state import state
    from apps.admin_console.database.repositories.session_repository import session_repo
    from apps.admin_console.routers import media, replay, sessions, steps, stream, system, tasks
    from apps.admin_console.routers.replay import replay_manager
    from apps.admin_console.services.ipc_service import ipc_service
    from apps.admin_console.services.model_service import model_service
    from apps.admin_console.services.task_queue_service import task_queue_service

# Initialize language server synchronization address
init_ls_address()

# Initialize FastAPI application
app = FastAPI(title="Artemis Admin & Trace Console")

# Configure CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.on_event("startup")
async def on_startup():
    """Startup lifecycle hooks."""
    state.is_shutting_down = False
    state.shutdown_event.clear()
    write_server_info(port=getattr(state, "port", 8000), host=getattr(state, "host", "0.0.0.0"))
    await asyncio.to_thread(start_awake_service)
    cleaned_device_locks = DeviceExecutionLock.cleanup_stale_locks()
    if cleaned_device_locks:
        print(f"[ServerStartup] Removed {cleaned_device_locks} stale device lock(s).")
    asyncio.create_task(asyncio.to_thread(task_queue_service.archive_older_replays_on_launch))
    asyncio.create_task(
        asyncio.to_thread(task_queue_service.verify_chunks_exist_on_launch, replay_manager)
    )

    cleaned = session_repo.cleanup_orphans_on_startup()
    if cleaned > 0:
        print(f"[ServerStartup] Marked {cleaned} orphaned running session(s) as failed.")

    await ipc_service.start_server()
    state.worker_task = asyncio.create_task(task_queue_service.queue_worker())


@app.on_event("shutdown")
async def on_shutdown():
    """Stop task and IPC children before the UI server exits."""
    state.is_shutting_down = True
    state.shutdown_event.set()
    task_queue_service._broadcast_event("server_shutdown", {"status": "stopping"})
    owned_session_ids = {
        str(item["session_id"])
        for item in state.queue_items
        if isinstance(item, dict) and item.get("status") == "running" and item.get("session_id")
    }

    worker = state.worker_task
    if worker is not None and not worker.done():
        worker.cancel()
        try:
            await asyncio.wait_for(worker, timeout=5.0)
        except (asyncio.CancelledError, TimeoutError):
            pass
    state.worker_task = None

    if state.current_process is not None and state.current_process.returncode is None:
        await task_queue_service._terminate_worker_process(state.current_process)
    for item in state.queue_items:
        if isinstance(item, dict):
            DeviceExecutionLock.cancel_reservation(item.get("queue_ticket"))
    DeviceExecutionLock.cleanup_stale_locks()
    state.current_process = None
    state.queue_items.clear()
    for session_id in owned_session_ids:
        session_repo.update_session_status(session_id, "cancelled")

    await ipc_service.stop_server()
    state.ipc_subscribers.clear()
    await asyncio.to_thread(shutdown_awake_service)
    clear_server_info()


# Mount modular routers
app.include_router(stream.router)
app.include_router(media.router)
app.include_router(sessions.router)
app.include_router(steps.router)
app.include_router(tasks.router)
app.include_router(replay.router)
app.include_router(system.router)

# Mount cloud gateway router for Frappe / Cloud integration if present
try:
    from cloud_service.gateway import cloud_router

    app.include_router(cloud_router)
except ImportError:
    try:
        from apps.cloud_service.gateway import cloud_router

        app.include_router(cloud_router)
    except ImportError:
        pass


# ------------------------------------------------------------------------------
# Showcase UI (Angular 19) Unified Single-Port SPA Static Hosting
# ------------------------------------------------------------------------------
def _get_showcase_dist() -> Path:
    """Return the Showcase UI Angular build directory."""
    base_dist = _workspace_root / "apps" / "showcase_ui" / "dist"
    candidates = [
        base_dist / "frontend" / "browser",
        base_dist / "browser",
        base_dist / "frontend",
        base_dist,
    ]
    for candidate in candidates:
        if candidate.is_dir() and (candidate / "index.html").exists():
            return candidate
    return base_dist / "frontend" / "browser"


@app.get("/", include_in_schema=False)
async def serve_showcase_root():
    """Explicitly serve the Showcase UI at the root path by default."""
    return await serve_showcase_spa("")


@app.get("/{full_path:path}", include_in_schema=False)
async def serve_showcase_spa(full_path: str):
    # Do not intercept API, media, or replay paths
    if (
        full_path.startswith("api/")
        or full_path.startswith("images/")
        or full_path.startswith("videos/")
        or full_path.startswith("local_file")
        or full_path == "docs"
        or full_path == "openapi.json"
        or full_path.startswith("redoc")
    ):
        from fastapi import HTTPException

        raise HTTPException(status_code=404, detail="Endpoint not found")

    clean_path = full_path.strip("/")

    # Admin / Debug Console routes
    if (
        clean_path in ("admin", "debug")
        or clean_path.startswith("admin/")
        or clean_path.startswith("debug/")
    ):
        admin_index = _admin_console_dir / "index.html"
        if admin_index.exists():
            return HTMLResponse(admin_index.read_text(encoding="utf-8"))

    showcase_dist = _get_showcase_dist()

    # Exact static file match (js, css, images, fonts, favicon, logo)
    if clean_path:
        target_file = showcase_dist / clean_path
        if target_file.is_file():
            return FileResponse(target_file)

        # Fallback for icons/logos if showcase UI hasn't been built yet
        public_file = _workspace_root / "apps" / "showcase_ui" / "public" / clean_path
        if public_file.is_file():
            return FileResponse(public_file)

    # Serve Showcase UI Angular SPA index.html
    index_file = showcase_dist / "index.html"
    if index_file.exists():
        return HTMLResponse(index_file.read_text(encoding="utf-8"))

    # Fallback message if Showcase UI is not built
    fallback_html = """<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Artemis Showcase UI - Not Built</title>
    <style>
        body {
            font-family: system-ui, -apple-system, sans-serif;
            background: #0f172a;
            color: #f8fafc;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
        }
        .card {
            background: #1e293b;
            padding: 2.5rem;
            border-radius: 1rem;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
            max-width: 500px;
            text-align: center;
            border: 1px solid #334155;
        }
        h1 { color: #38bdf8; margin-top: 0; }
        code {
            background: #0f172a;
            padding: 0.25rem 0.5rem;
            border-radius: 0.375rem;
            color: #e2e8f0;
            font-size: 0.9em;
        }
        .btn {
            display: inline-block;
            margin-top: 1.5rem;
            padding: 0.75rem 1.5rem;
            background: #38bdf8;
            color: #0f172a;
            font-weight: bold;
            text-decoration: none;
            border-radius: 0.5rem;
            transition: background 0.2s;
        }
        .btn:hover { background: #0284c7; color: #fff; }
    </style>
</head>
<body>
    <div class="card">
        <h1>✨ Artemis Showcase UI</h1>
        <p>The Showcase UI (Angular frontend) has not been built yet.</p>
        <p>To compile the Showcase UI, run:</p>
        <p><code>cd apps/showcase_ui && npm install && npm run build</code></p>
        <p>Or launch using <code>./start.sh</code> or <code>artemis ui</code> to build automatically.</p>
        <a class="btn" href="/admin">Go to Admin Debug Console →</a>
    </div>
</body>
</html>"""
    return HTMLResponse(fallback_html)


# ------------------------------------------------------------------------------
# Backward compatibility exports
# ------------------------------------------------------------------------------
get_active_model_info = model_service.get_active_model_info
start_ipc_server = ipc_service.start_server
queue_worker = task_queue_service.queue_worker
active_connections = state.active_connections
ipc_subscribers = state.ipc_subscribers
task_queue = state.task_queue
queue_goals = state.queue_goals


class ArtemisUvicornServer(uvicorn.Server):
    """Notify application streams before Uvicorn waits for them to close."""

    @staticmethod
    def _task_is_active() -> bool:
        """Check task state without doing process I/O from a signal handler."""
        proc = state.current_process
        if proc is not None and proc.returncode is None:
            return True
        return any(
            isinstance(item, dict) and item.get("status") == "running" for item in state.queue_items
        )

    @staticmethod
    def _schedule_signal_report(message: str) -> None:
        """Defer console output so a signal cannot re-enter Colorama writes."""
        try:
            asyncio.get_running_loop().call_soon(print, message)
        except RuntimeError:
            try:
                os.write(2, f"{message}\n".encode(errors="replace"))
            except OSError:
                pass

    def handle_exit(self, sig: int, frame: FrameType | None) -> None:
        try:
            signal_name = signal.Signals(sig).name
        except ValueError:
            signal_name = "UNKNOWN"
        frame_location = "unknown"
        if frame is not None:
            frame_location = f"{frame.f_code.co_filename}:{frame.f_lineno}"
        signal_report = (
            f"[ServerSignal] Received {signal_name} ({sig}); "
            f"server PID={os.getpid()}, parent PID={os.getppid()}, frame={frame_location}"
        )
        self._schedule_signal_report(signal_report)

        if sys.platform == "win32" and sig == signal.SIGINT and self._task_is_active():
            self._schedule_signal_report(
                "[ServerSignal] Ignored Windows SIGINT while a mobile task is active. "
                "Stop the task first, or press Ctrl+Break to force server shutdown."
            )
            return

        state.is_shutting_down = True
        state.shutdown_event.set()
        super().handle_exit(sig, frame)


def run_ui_server(host: str, port: int, reload: bool = False) -> None:
    """Run the UI server with bounded, signal-aware graceful shutdown."""
    state.host = host
    state.port = port
    write_server_info(port=port, host=host)

    try:
        if reload:
            uvicorn.run(
                "apps.admin_console.server:app",
                host=host,
                port=port,
                reload=True,
                timeout_graceful_shutdown=5,
            )
            return

        config = uvicorn.Config(
            app,
            host=host,
            port=port,
            timeout_graceful_shutdown=5,
        )
        ArtemisUvicornServer(config).run()
    finally:
        clear_server_info()


def main():
    port = int(os.environ.get("ANTIGRAVITY_SIDECAR_WEB_PORT", 8000))
    run_ui_server(host="0.0.0.0", port=port)


if __name__ == "__main__":
    main()