# 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.

from __future__ import annotations

import pathlib

from google.adk.agents import Agent
from google.adk.code_executors.unsafe_local_code_executor import UnsafeLocalCodeExecutor
from google.adk.skills import load_skill_from_dir
from google.adk.skills import models
from google.adk.tools.base_tool import BaseTool
from google.adk.tools.skill_toolset import SkillToolset
from google.genai import types


class GetTimezoneTool(BaseTool):
  """A tool to get the timezone for a given location."""

  def __init__(self):
    super().__init__(
        name="get_timezone",
        description="Returns the timezone for a given location.",
    )

  def _get_declaration(self) -> types.FunctionDeclaration | None:
    return types.FunctionDeclaration(
        name=self.name,
        description=self.description,
        parameters_json_schema={
            "type": "object",
            "properties": {
                "location": {
                    "type": "string",
                    "description": "The location to get the timezone for.",
                },
            },
            "required": ["location"],
        },
    )

  async def run_async(self, *, args: dict, tool_context) -> str:
    return f"The timezone for {args['location']} is UTC-08:00."


def get_wind_speed(location: str) -> str:
  """Returns the current wind speed for a given location."""
  return f"The wind speed in {location} is 10 mph."


# 1. Define a skill programmatically
support_hours_skill = models.Skill(
    frontmatter=models.Frontmatter(
        name="support-hours-skill",
        description=(
            "A skill to check customer support hours for a given location."
        ),
        metadata={"adk_additional_tools": ["get_timezone"]},
    ),
    instructions=(
        "Step 1: Look up the timezone for the user's location using"
        " 'get_timezone'. Step 2: Read 'references/support_policy.txt' to"
        " understand support hours policy. Step 3: Explain the support hours"
        " relative to the location's timezone."
    ),
    resources=models.Resources(
        references={
            "support_policy.txt": (
                "Customer support is available Monday through Friday, "
                "from 9:00 AM to 5:00 PM local time."
            ),
        },
    ),
)

# 2. Load a skill from a directory
weather_skill = load_skill_from_dir(
    pathlib.Path(__file__).parent / "skills" / "weather-skill"
)

# 3. Combine them into a SkillToolset
# NOTE: UnsafeLocalCodeExecutor has security concerns and should NOT
# be used in production environments.
my_skill_toolset = SkillToolset(
    skills=[support_hours_skill, weather_skill],
    additional_tools=[GetTimezoneTool(), get_wind_speed],
    code_executor=UnsafeLocalCodeExecutor(),
)

# 4. Set up the agent with the toolset
root_agent = Agent(
    name="skills_agent",
    description="An agent that can use specialized skills.",
    tools=[
        my_skill_toolset,
    ],
)
