"""Shared Claude Code environment policy for FCC client surfaces."""

from collections.abc import Mapping

from free_claude_code.cli.local_http import with_local_proxy_bypass
from free_claude_code.cli.proxy_auth import proxy_auth_token

CLAUDE_CODE_AUTO_COMPACT_WINDOW = "190000"
CLAUDE_BINARY_NAME = "claude"


def build_claude_proxy_env(
    *,
    proxy_root_url: str,
    auth_token: str,
    base_env: Mapping[str, str],
) -> dict[str, str]:
    """Return the canonical environment for Claude Code proxy sessions."""

    # Claude's aggregate traffic flag also suppresses gateway model discovery.
    env = with_local_proxy_bypass(
        {
            key: value
            for key, value in base_env.items()
            if not key.startswith("ANTHROPIC_")
            and key != "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC"
        },
        proxy_root_url=proxy_root_url,
    )
    env["ANTHROPIC_BASE_URL"] = proxy_root_url
    env["ANTHROPIC_AUTH_TOKEN"] = proxy_auth_token(auth_token)
    env["CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY"] = "1"
    env["CLAUDE_CODE_AUTO_COMPACT_WINDOW"] = CLAUDE_CODE_AUTO_COMPACT_WINDOW
    env["DISABLE_AUTOUPDATER"] = "1"
    env["DISABLE_FEEDBACK_COMMAND"] = "1"
    env["DISABLE_ERROR_REPORTING"] = "1"
    return env