import sys

import pytest

from lightrag.api.config import get_default_host, parse_args


pytestmark = pytest.mark.offline


def _clear_bedrock_auth_env(monkeypatch):
    for key in (
        "LLM_BINDING",
        "EMBEDDING_BINDING",
        "QUERY_LLM_BINDING",
        "QUERY_LLM_BINDING_API_KEY",
        "AWS_ACCESS_KEY_ID",
        "AWS_SECRET_ACCESS_KEY",
        "AWS_SESSION_TOKEN",
        "AWS_BEARER_TOKEN_BEDROCK",
        "QUERY_AWS_ACCESS_KEY_ID",
        "QUERY_AWS_SECRET_ACCESS_KEY",
    ):
        monkeypatch.delenv(key, raising=False)


def test_bedrock_default_host_uses_sdk_default_endpoint(monkeypatch):
    monkeypatch.delenv("LLM_BINDING_HOST", raising=False)

    assert get_default_host("bedrock") == "DEFAULT_BEDROCK_ENDPOINT"


def test_bedrock_custom_host_is_returned(monkeypatch):
    monkeypatch.setenv("LLM_BINDING_HOST", "https://proxy.example.com")

    assert get_default_host("bedrock") == "https://proxy.example.com"


def test_bedrock_env_binding_alias_is_normalized(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("LLM_BINDING", "aws_bedrock")
    monkeypatch.setenv("EMBEDDING_BINDING", "aws_bedrock")
    monkeypatch.setenv("AWS_BEARER_TOKEN_BEDROCK", "absk-test")

    args = parse_args()

    assert args.llm_binding == "bedrock"
    assert args.embedding_binding == "bedrock"


def test_bedrock_cli_binding_alias_is_not_supported(monkeypatch):
    monkeypatch.setattr(
        sys, "argv", ["lightrag-server", "--llm-binding", "aws_bedrock"]
    )

    with pytest.raises(SystemExit):
        parse_args()


def test_bedrock_role_env_binding_alias_is_normalized(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("QUERY_LLM_BINDING", "aws_bedrock")
    monkeypatch.setenv("QUERY_LLM_MODEL", "us.amazon.nova-lite-v1:0")
    monkeypatch.setenv("QUERY_AWS_REGION", "us-west-2")
    monkeypatch.setenv("QUERY_AWS_ACCESS_KEY_ID", "akid")
    monkeypatch.setenv("QUERY_AWS_SECRET_ACCESS_KEY", "secret")

    args = parse_args()

    assert args.query_llm_binding == "bedrock"
    assert args.query_aws_region == "us-west-2"


def test_bedrock_role_api_key_is_rejected(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("QUERY_LLM_BINDING", "bedrock")
    monkeypatch.setenv("QUERY_LLM_MODEL", "us.amazon.nova-lite-v1:0")
    monkeypatch.setenv("QUERY_LLM_BINDING_API_KEY", "absk-role")

    with pytest.raises(SystemExit, match="does not support QUERY_LLM_BINDING_API_KEY"):
        parse_args()


def test_bedrock_binding_requires_sigv4_pair_or_bearer_token(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("LLM_BINDING", "bedrock")
    monkeypatch.setenv("EMBEDDING_BINDING", "ollama")

    with pytest.raises(ValueError, match="Bedrock LLM binding requires"):
        parse_args()


def test_bedrock_binding_rejects_partial_sigv4_pair(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("LLM_BINDING", "bedrock")
    monkeypatch.setenv("EMBEDDING_BINDING", "ollama")
    monkeypatch.setenv("AWS_ACCESS_KEY_ID", "akid")

    with pytest.raises(ValueError, match="Bedrock LLM binding requires"):
        parse_args()


def test_bedrock_binding_accepts_sigv4_pair(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("LLM_BINDING", "bedrock")
    monkeypatch.setenv("EMBEDDING_BINDING", "ollama")
    monkeypatch.setenv("AWS_ACCESS_KEY_ID", "akid")
    monkeypatch.setenv("AWS_SECRET_ACCESS_KEY", "secret")

    args = parse_args()

    assert args.llm_binding == "bedrock"


def test_bedrock_binding_accepts_bearer_token(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("LLM_BINDING", "bedrock")
    monkeypatch.setenv("EMBEDDING_BINDING", "ollama")
    monkeypatch.setenv("AWS_BEARER_TOKEN_BEDROCK", "absk-test")

    args = parse_args()

    assert args.llm_binding == "bedrock"


def test_bedrock_role_requires_complete_role_sigv4_pair(monkeypatch):
    _clear_bedrock_auth_env(monkeypatch)
    monkeypatch.setattr(sys, "argv", ["lightrag-server"])
    monkeypatch.setenv("QUERY_LLM_BINDING", "bedrock")
    monkeypatch.setenv("QUERY_LLM_MODEL", "us.amazon.nova-lite-v1:0")
    monkeypatch.setenv("QUERY_AWS_ACCESS_KEY_ID", "akid")

    with pytest.raises(ValueError, match="Bedrock role 'query' requires"):
        parse_args()