"""Shared, transport-agnostic tool registry.

This module is the single source of truth that maps each MCP tool name to its
async handler. Both transport adapters consume it:

* the HTTP/OAuth server (``server.py``), and
* the local stdio adapter (``stdio_app.py``).

Tool *definitions* (name, description, JSON schema, read/write flag) live in
``mcp_protocol.AVAILABLE_TOOLS``; this module binds those names to callables and
exposes lookup helpers so neither adapter duplicates the tool list. It imports
only core modules and never the web stack, keeping the core importable without
FastAPI installed.
"""

from __future__ import annotations

from collections.abc import Awaitable, Callable
from typing import Any

from aegis_gitea_mcp.gitea_client import GiteaClient
from aegis_gitea_mcp.mcp_protocol import (
    AVAILABLE_TOOLS,
    MCPTool,
    get_tool_by_name,
)
from aegis_gitea_mcp.tools.raw_tools import raw_api_request_tool
from aegis_gitea_mcp.tools.read_tools import (
    compare_refs_tool,
    get_branch_tool,
    get_commit_diff_tool,
    get_commit_status_tool,
    get_issue_tool,
    get_latest_release_tool,
    get_pull_request_tool,
    get_release_tool,
    get_repo_languages_tool,
    list_branches_tool,
    list_commits_tool,
    list_issue_comments_tool,
    list_issues_tool,
    list_labels_tool,
    list_milestones_tool,
    list_org_repositories_tool,
    list_organizations_tool,
    list_pull_request_commits_tool,
    list_pull_request_files_tool,
    list_pull_requests_tool,
    list_releases_tool,
    list_repo_topics_tool,
    list_tags_tool,
    search_code_tool,
)
from aegis_gitea_mcp.tools.repository import (
    get_file_contents_tool,
    get_file_tree_tool,
    get_repository_info_tool,
    list_repositories_tool,
)
from aegis_gitea_mcp.tools.write_tools import (
    add_labels_tool,
    assign_issue_tool,
    create_branch_tool,
    create_issue_comment_tool,
    create_issue_tool,
    create_label_tool,
    create_milestone_tool,
    create_pr_comment_tool,
    create_pull_request_tool,
    create_release_tool,
    edit_issue_comment_tool,
    edit_release_tool,
    remove_labels_tool,
    update_issue_tool,
    update_label_tool,
)

ToolHandler = Callable[[GiteaClient, dict[str, Any]], Awaitable[dict[str, Any]]]

TOOL_HANDLERS: dict[str, ToolHandler] = {
    # Baseline read tools
    "list_repositories": list_repositories_tool,
    "get_repository_info": get_repository_info_tool,
    "get_file_tree": get_file_tree_tool,
    "get_file_contents": get_file_contents_tool,
    # Expanded read tools
    "search_code": search_code_tool,
    "list_commits": list_commits_tool,
    "get_commit_diff": get_commit_diff_tool,
    "compare_refs": compare_refs_tool,
    "list_issues": list_issues_tool,
    "get_issue": get_issue_tool,
    "list_pull_requests": list_pull_requests_tool,
    "get_pull_request": get_pull_request_tool,
    "list_labels": list_labels_tool,
    "list_tags": list_tags_tool,
    "list_releases": list_releases_tool,
    "list_pull_request_files": list_pull_request_files_tool,
    "list_pull_request_commits": list_pull_request_commits_tool,
    "list_issue_comments": list_issue_comments_tool,
    "list_branches": list_branches_tool,
    "get_branch": get_branch_tool,
    "get_release": get_release_tool,
    "get_latest_release": get_latest_release_tool,
    "list_milestones": list_milestones_tool,
    "get_commit_status": get_commit_status_tool,
    "list_org_repositories": list_org_repositories_tool,
    "list_organizations": list_organizations_tool,
    "get_repo_languages": get_repo_languages_tool,
    "list_repo_topics": list_repo_topics_tool,
    # Write-mode tools
    "create_issue": create_issue_tool,
    "update_issue": update_issue_tool,
    "create_issue_comment": create_issue_comment_tool,
    "create_pr_comment": create_pr_comment_tool,
    "add_labels": add_labels_tool,
    "assign_issue": assign_issue_tool,
    "create_label": create_label_tool,
    "update_label": update_label_tool,
    "remove_labels": remove_labels_tool,
    "create_pull_request": create_pull_request_tool,
    "create_release": create_release_tool,
    "edit_release": edit_release_tool,
    "create_branch": create_branch_tool,
    "create_milestone": create_milestone_tool,
    "edit_issue_comment": edit_issue_comment_tool,
    # Generic raw API dispatch (escape hatch). Registered as a read tool so GETs
    # work without write-mode; the handler authorizes writes per-method itself.
    "gitea_request": raw_api_request_tool,
}


def get_tool_handler(tool_name: str) -> ToolHandler | None:
    """Return the async handler bound to a tool name, or None if unknown."""
    return TOOL_HANDLERS.get(tool_name)


def list_tool_definitions() -> list[MCPTool]:
    """Return all registered tool definitions (name, schema, read/write flag)."""
    return list(AVAILABLE_TOOLS)


__all__ = [
    "AVAILABLE_TOOLS",
    "MCPTool",
    "ToolHandler",
    "TOOL_HANDLERS",
    "get_tool_by_name",
    "get_tool_handler",
    "list_tool_definitions",
]