import json
import os
import sys
import threading
import time
from uuid import uuid4

from diagnosis import DiagnosisEngine
from events import emit_event, emit_run_progress
from redis_client import get_redis_client
from result_listener import listen_for_results
from task_builder import build_task


def send_task(redis_client, task, runs=None, run_id=None):
    if run_id:
        task["run_id"] = run_id
        if runs is not None and run_id in runs:
            runs[run_id]["expected"] += 1
            emit_run_progress(run_id, runs[run_id])

    redis_client.lpush("tasks", json.dumps(task))
    print(f"sent {task['action']} to {task['target']} ({task['task_id']})")
    emit_event(
        {
            "type": "task",
            "message": f"sent {task['action']} to {task['target']}",
            "run_id": task.get("run_id"),
            "node": task.get("target"),
        }
    )


def stop_run(runs, run_id):
    run = runs.get(run_id)
    if not run or not run.get("active"):
        return False

    run["active"] = False
    run["status"] = "stopped"
    emit_event(
        {
            "type": "run_status",
            "message": "run status: stopped",
            "run_id": run_id,
            "node": None,
            "status": "stopped",
        }
    )
    runs.pop(run_id, None)
    return True


def apply_run_action(redis_client, run_actions, run_id, command):
    context = run_actions.get(run_id, {})
    if command == "ignore":
        emit_event(
            {
                "type": "action",
                "message": "proposal ignored",
                "run_id": run_id,
                "node": None,
            }
        )
        return True

    if command == "check_network":
        emit_event(
            {
                "type": "action",
                "message": "confirmed action: check network connectivity",
                "run_id": run_id,
                "node": "vps",
            }
        )
        send_task(
            redis_client,
            build_task("vps", "exec", {"cmd": "ping -c 1 1.1.1.1"}),
            run_id=run_id,
        )
        return True

    if command == "restart_ha":
        container_name = context.get("ha_container_name") or "homeassistant"
        emit_event(
            {
                "type": "action",
                "message": f"confirmed action: restart {container_name}",
                "run_id": run_id,
                "node": "piha",
            }
        )
        send_task(
            redis_client,
            build_task("piha", "exec", {"cmd": f"docker restart {container_name}"}),
            run_id=run_id,
        )
        return True

    emit_event(
        {
            "type": "action",
            "message": f"unknown proposal command: {command}",
            "run_id": run_id,
            "node": None,
        }
    )
    return False


def emit_auto_config(auto_config, message=None):
    emit_event(
        {
            "type": "auto_config",
            "message": message or "auto config updated",
            "run_id": None,
            "node": None,
            "auto_mode": auto_config.get("auto_mode"),
            "action_thresholds": auto_config.get("action_thresholds", {}),
            "default_threshold": auto_config.get("default_threshold"),
            "allowed_auto_actions": auto_config.get("allowed_auto_actions", []),
            "max_retries_per_action": auto_config.get("max_retries_per_action", {}),
            "retry_window_seconds": auto_config.get("retry_window_seconds"),
        }
    )


def set_auto_config(auto_config, config):
    if "auto_mode" in config:
        auto_config["auto_mode"] = bool(config["auto_mode"])
    if isinstance(config.get("action_thresholds"), dict):
        auto_config["action_thresholds"] = {
            str(command): float(threshold)
            for command, threshold in config["action_thresholds"].items()
        }
    if "default_threshold" in config:
        auto_config["default_threshold"] = float(config["default_threshold"])
    if isinstance(config.get("allowed_auto_actions"), list):
        auto_config["allowed_auto_actions"] = [
            str(command)
            for command in config["allowed_auto_actions"]
        ]

    emit_auto_config(auto_config)


def set_auto_mode(auto_config, enabled):
    set_auto_config(auto_config, {"auto_mode": enabled})


def dispatch(redis_client, command, ha_task_ids, runs):
    if command == "ha":
        run_id = str(uuid4())
        runs[run_id] = {
            "expected": 0,
            "received": 0,
            "engine": DiagnosisEngine(),
            "active": True,
            "status": "running",
        }
        emit_event(
            {
                "type": "run_status",
                "message": "run status: running",
                "run_id": run_id,
                "node": None,
                "status": "running",
            }
        )
        emit_run_progress(run_id, runs[run_id])

        task = build_task("piha", "docker_ps", {})
        ha_task_ids[task["task_id"]] = run_id
        send_task(redis_client, task, runs, run_id)
    elif command == "stop":
        for run_id, run in list(runs.items()):
            if not run.get("active"):
                continue

            stop_run(runs, run_id)
    elif command == "all":
        send_task(redis_client, build_task("piha", "docker_ps", {}))
        send_task(redis_client, build_task("vps", "docker_ps", {}))
    else:
        send_task(redis_client, build_task("piha", "docker_ps", {}))


def process_input(command, redis_client, ha_task_ids, runs):
    if not command:
        return

    print(f"[input] {command}")
    emit_event(
        {
            "type": "log",
            "message": f"user input: {command}",
            "run_id": None,
            "node": None,
        }
    )
    dispatch(redis_client, command, ha_task_ids, runs)


def listen_for_input_tasks(redis_client, ha_task_ids, runs, run_actions, auto_config):
    while True:
        _, raw_task = redis_client.brpop("tasks")
        try:
            task = json.loads(raw_task)
        except json.JSONDecodeError:
            continue

        if task.get("target") != "orchestrator":
            redis_client.lpush("tasks", raw_task)
            time.sleep(1)
            continue

        action = task.get("action")
        if action == "stop_run":
            params = task.get("params") or {}
            stop_run(runs, str(params.get("run_id", "")).strip())
            continue

        if action == "run_action":
            params = task.get("params") or {}
            apply_run_action(
                redis_client,
                run_actions,
                str(params.get("run_id", "")).strip(),
                str(params.get("command", "")).strip(),
            )
            continue

        if action == "set_auto_mode":
            params = task.get("params") or {}
            set_auto_mode(auto_config, bool(params.get("auto_mode")))
            continue

        if action == "set_auto_config":
            params = task.get("params") or {}
            set_auto_config(auto_config, params.get("config") or {})
            continue

        if action != "input":
            continue

        params = task.get("params") or {}
        process_input(str(params.get("command", "")).strip(), redis_client, ha_task_ids, runs)


def services_list(services):
    return [
        {
            "name": name,
            "status": state["status"],
            "last_check": state["last_check"],
            "node": state.get("node"),
            "history": state["history"],
        }
        for name, state in sorted(services.items())
    ]


def update_service_health(services, event):
    service_name = event.get("service")
    status = event.get("status")
    node = event.get("node")
    timestamp = event.get("timestamp", time.time())
    if not service_name or status not in ("ok", "error"):
        return

    state = services.setdefault(
        service_name,
        {
            "status": status,
            "last_check": timestamp,
            "node": node,
            "history": [],
        },
    )
    state["status"] = status
    state["last_check"] = timestamp
    state["node"] = node
    state["history"].append({"status": status, "timestamp": timestamp, "node": node})
    state["history"] = state["history"][-20:]

    emit_event(
        {
            "type": "services_state",
            "message": "services health updated",
            "run_id": None,
            "node": None,
            "services": services_list(services),
        }
    )


def listen_for_external_events(redis_client, services):
    while True:
        try:
            _, raw_event = redis_client.brpop("events")
            event = json.loads(raw_event)
        except json.JSONDecodeError:
            emit_event(
                {
                    "type": "log",
                    "message": f"invalid external event: {raw_event}",
                    "run_id": None,
                    "node": None,
                }
            )
            continue

        emit_event(event)
        if event.get("type") == "health":
            update_service_health(services, event)


def main():
    if not os.path.exists("/tmp/agent-events.log"):
        open("/tmp/agent-events.log", "w").close()

    redis_client = get_redis_client()
    ha_task_ids = {}
    runs = {}
    last_actions = {}
    run_actions = {}
    services = {}
    auto_config = {
        "auto_mode": True,
        "action_thresholds": {
            "restart_ha": 0.8,
            "check_network": 0.9,
        },
        "default_threshold": 0.9,
        "allowed_auto_actions": ["restart_ha"],
        "max_retries_per_action": {
            "restart_ha": 3,
        },
        "retry_window_seconds": 300,
        "action_history": {},
    }

    listener = threading.Thread(
        target=listen_for_results,
        args=(redis_client, ha_task_ids, runs, last_actions, run_actions, auto_config),
        daemon=True,
    )
    listener.start()

    input_listener = threading.Thread(
        target=listen_for_input_tasks,
        args=(redis_client, ha_task_ids, runs, run_actions, auto_config),
        daemon=True,
    )
    input_listener.start()

    event_listener = threading.Thread(
        target=listen_for_external_events,
        args=(redis_client, services),
        daemon=True,
    )
    event_listener.start()

    print("[orchestrator] ready")
    emit_event(
        {
            "type": "log",
            "message": "orchestrator ready",
            "run_id": None,
            "node": None,
        }
    )
    emit_auto_config(auto_config, "auto mode: on")
    while True:
        try:
            command = input("> ").strip()
        except EOFError:
            if not sys.stdin.isatty():
                print("[orchestrator] stdin closed, exiting")
                emit_event(
                    {
                        "type": "log",
                        "message": "stdin closed, exiting",
                        "run_id": None,
                        "node": None,
                    }
                )
                return
            print("[orchestrator] stdin closed, waiting...")
            emit_event(
                {
                    "type": "log",
                    "message": "stdin closed, waiting",
                    "run_id": None,
                    "node": None,
                }
            )
            time.sleep(2)
            continue
        except KeyboardInterrupt:
            print()
            continue

        process_input(command, redis_client, ha_task_ids, runs)


if __name__ == "__main__":
    main()