# 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.
#
# Portions of this file are derived from mobile-use (https://github.com/minitap-ai/mobile-use)
# Copyright 2025-2026 Minitap, Inc. Licensed under the Apache License 2.0.

import os
from shutil import which
import time
from typing import Any

from artemis.context import ArtemisContext, DevicePlatform
from artemis.utils.logger import ArtemisLogger, get_logger
from artemis.utils.shell_utils import run_shell_command_on_host

logger = get_logger(__name__)


def get_adb_device(ctx: ArtemisContext) -> Any:
    """Retrieve the ADB device instance (AdbDevice locally or RemoteAdbDevice in Cloud mode)."""
    if ctx.adb_client is None:
        if os.environ.get("ARTEMIS_CLOUD_MODE") == "1":
            from cloud_service.virtualization import RemoteAdbClient

            ctx.adb_client = RemoteAdbClient()
            return ctx.adb_client.device(serial=ctx.device.device_id)
        return None

    if ctx.device.mobile_platform != DevicePlatform.ANDROID:
        return None

    adb = ctx.get_adb_client()
    return adb.device(serial=ctx.device.device_id)


def get_first_device(
    logger: ArtemisLogger | None = None,
) -> tuple[str | None, DevicePlatform | None, None]:
    """Gets the first available device, prioritizing idle and unassigned devices."""
    try:
        from artemis.runtime import device_pool

        chosen = device_pool.select_device()
        if chosen:
            return chosen, DevicePlatform.ANDROID, None
    except Exception as exc:
        if logger:
            logger.debug(f"Device pool selection fallback: {exc}")

    if which("adb"):
        try:
            android_output = run_shell_command_on_host("adb devices")
            lines = android_output.strip().split("\n")
            for line in lines:
                if "device" in line and not line.startswith("List of devices"):
                    return line.split()[0], DevicePlatform.ANDROID, None
        except RuntimeError as e:
            if logger:
                logger.error(f"ADB command failed: {e}")

    return None, None, None


def get_device_date(ctx: ArtemisContext) -> str:
    device = get_adb_device(ctx)
    if not device:
        return time.strftime("%Y-%m-%d %H:%M:%S")
    try:
        return str(device.shell("date")).strip()
    except Exception as e:
        logger.debug(f"Failed to get device date: {e}")
        return time.strftime("%Y-%m-%d %H:%M:%S")


def list_packages(ctx: ArtemisContext) -> str:
    """List installed packages dynamically from the physical/remote device."""
    device = get_adb_device(ctx)
    if not device:
        return ""

    try:
        cmd = ["pm", "list", "packages", "-f"]
        raw_output = str(device.shell(" ".join(cmd)))
    except Exception as e:
        logger.error(f"Failed to query package list from device: {e}")
        return ""

    lines = raw_output.strip().split("\n")
    packages = []
    for line in lines:
        if "=" in line:
            package_name = line.split("=")[-1].strip()
            if package_name:
                packages.append(package_name)
        elif line.startswith("package:"):
            package_name = line.split("package:")[-1].strip()
            if package_name:
                packages.append(package_name)

    return "\n".join(sorted(packages))


async def list_packages_async(ctx: ArtemisContext) -> str:
    return list_packages(ctx)


def get_current_foreground_package(ctx: ArtemisContext) -> str | None:
    """Get the package name of the currently focused/foreground app dynamically."""
    device = get_adb_device(ctx)
    if not device:
        return None

    try:
        app_info = device.current_app()
        if app_info and app_info.package:
            return app_info.package
    except Exception as e:
        logger.debug(f"device.current_app failed: {e}. Falling back to dumpsys.")

    try:
        output = str(device.shell("dumpsys window | grep mCurrentFocus"))
        if "mCurrentFocus=" in output:
            segment = output.split("mCurrentFocus=")[-1]
            if "/" in segment:
                tokens = segment.split()
                for token in tokens:
                    if "." in token and not token.startswith("Window"):
                        package = token.split("/")[0]
                        package = package.rstrip("}")
                        if package and "." in package:
                            return package
    except Exception as e:
        logger.debug(f"Fallback dumpsys parsing failed: {e}")

    return None


async def get_current_foreground_package_async(ctx: ArtemisContext) -> str | None:
    return get_current_foreground_package(ctx)