from __future__ import annotations

import json
import subprocess
from pathlib import Path
from unittest import mock

import click
import pytest
from click.testing import CliRunner

from mlflow.agent.agents import AGENTS
from mlflow.agent.setup.cli import _git_root, _is_localhost_tracking_uri, setup
from mlflow.telemetry.events import AgentSetupEvent


@pytest.fixture
def tmp_git_repo(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Path:
    subprocess.run(["git", "init"], cwd=tmp_path, check=True, capture_output=True)
    monkeypatch.chdir(tmp_path)
    # The backend prompt only appears when no tracking URI is configured, so clear it to keep
    # the tests deterministic regardless of the developer's environment.
    monkeypatch.delenv("MLFLOW_TRACKING_URI", raising=False)
    return tmp_path


def test_setup_local_server_path(tmp_git_repo: Path):
    with (
        mock.patch(
            "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
        ) as mock_which,
        mock.patch("mlflow.agent.setup.cli._find_available_port", return_value=5050) as mock_port,
    ):
        result = CliRunner().invoke(setup, ["--agent", "claude", "--print"], input="1\nn\n1\n")
    assert result.exit_code == 0, result.stderr
    assert "Picked local tracking URI: http://127.0.0.1:5050" in result.stderr
    assert "mlflow server --host 127.0.0.1 --port 5050" in result.stdout
    assert "Start a local MLflow tracking server" in result.stdout
    mock_which.assert_called()
    mock_port.assert_called_once()


def test_setup_user_provided_uri(tmp_git_repo: Path):
    with mock.patch(
        "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
    ) as mock_which:
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\nn\n1\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "Start a local MLflow tracking server" not in result.stdout
    assert "MLFLOW_TRACKING_URI=http://localhost:5001" in result.stdout
    mock_which.assert_called()


@pytest.mark.parametrize(
    ("agent", "binary", "skills_dir"),
    [
        ("claude", "/usr/local/bin/claude", ".claude/skills"),
        ("codex", "/usr/local/bin/codex", ".agents/skills"),
        ("opencode", "/usr/local/bin/opencode", ".agents/skills"),
    ],
)
def test_setup_renders_per_agent_skills_dir(
    tmp_git_repo: Path, agent: str, binary: str, skills_dir: str
):
    # claude/codex offer the Assistant on a localhost URI; decline so the project-level
    # skills prompt (which this test asserts on) still appears.
    assistant_input = "n\n" if agent in ("claude", "codex") else ""
    with mock.patch("mlflow.agent.agents.shutil.which", return_value=binary) as mock_which:
        result = CliRunner().invoke(
            setup,
            ["--agent", agent, "--print"],
            input=f"3\nhttp://localhost:5001\n{assistant_input}1\n",
        )
    assert result.exit_code == 0, result.stderr
    assert f"Install MLflow skills at {skills_dir}/" in result.stderr
    assert f"`{skills_dir}/`" in result.stdout
    mock_which.assert_called()


@pytest.mark.parametrize(
    ("agent", "expected_args_before_prompt"),
    [
        ("claude", ["claude"]),
        ("codex", ["codex"]),
        ("opencode", ["opencode", "--prompt"]),
    ],
)
def test_setup_launches_agent_with_correct_argv(
    tmp_git_repo: Path, agent: str, expected_args_before_prompt: list[str]
):
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value=f"/usr/local/bin/{agent}"),
        mock.patch("mlflow.agent.setup.cli._git_root", return_value=(tmp_git_repo, None)),
        mock.patch(
            "mlflow.agent.setup.cli.subprocess.run",
            return_value=subprocess.CompletedProcess([], 0),
        ) as mock_run,
    ):
        assistant_input = "n\n" if agent in ("claude", "codex") else ""
        CliRunner().invoke(
            setup, ["--agent", agent], input=f"3\nhttp://localhost:5001\n{assistant_input}1\n"
        )
    mock_run.assert_called_once()
    cmd = mock_run.call_args.args[0]
    assert cmd[:-1] == expected_args_before_prompt
    assert cmd[-1].startswith("# MLflow Tracing Setup")


def test_git_root_outside_repo(tmp_path: Path):
    root, reason = _git_root(tmp_path)
    assert root is None
    assert reason == "Not inside a git repository."


def test_git_root_when_git_not_installed(tmp_path: Path):
    with mock.patch(
        "mlflow.agent.setup.cli.subprocess.run", side_effect=FileNotFoundError
    ) as mock_run:
        root, reason = _git_root(tmp_path)
    assert root is None
    assert reason == "Git is not installed."
    mock_run.assert_called_once()


@pytest.mark.parametrize("reason", ["Not inside a git repository.", "Git is not installed."])
def test_setup_outside_git_falls_back_to_cwd(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch, reason: str
):
    monkeypatch.chdir(tmp_path)
    with (
        mock.patch(
            "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
        ) as mock_which,
        mock.patch(
            "mlflow.agent.setup.cli._git_root", return_value=(None, reason)
        ) as mock_git_root,
    ):
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\nn\n1\n"
        )
    assert result.exit_code == 0, result.stderr
    assert f"{reason} The agent's edits cannot be reviewed or reverted with git." in result.stderr
    assert (tmp_path / ".claude" / "skills").is_dir()
    mock_which.assert_called()
    mock_git_root.assert_called_once()


def test_setup_declined_skills_uses_bundled_path(tmp_git_repo: Path):
    with mock.patch(
        "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
    ) as mock_which:
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\nn\n2\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "Skipping skill installation." in result.stderr
    assert "MLflow skills are bundled at" in result.stdout
    assert "/mlflow/assistant/skills" in result.stdout
    assert not (tmp_git_repo / ".claude").exists()
    mock_which.assert_called()


@pytest.mark.parametrize(
    ("skills_input", "skills_install_confirmed"),
    [("1", True), ("2", False)],
)
def test_setup_records_telemetry(
    tmp_git_repo: Path, skills_input: str, skills_install_confirmed: bool
):
    with (
        mock.patch(
            "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
        ) as mock_which,
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input=f"3\nhttp://localhost:5001\nn\n{skills_input}\n",
        )
    assert result.exit_code == 0, result.stderr
    mock_which.assert_called()
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": "claude",
            "print_prompt": True,
            "skills_install_confirmed": skills_install_confirmed,
            "assistant_configured": False,
        },
        success=True,
    )


def test_setup_requested_agent_not_installed(tmp_git_repo: Path):
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value=None) as mock_which,
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(setup, ["--agent", "claude", "--print"])
    assert result.exit_code != 0
    assert "not found on PATH" in result.stderr
    mock_which.assert_called()
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": None,
            "print_prompt": True,
            "skills_install_confirmed": None,
            "assistant_configured": None,
        },
        success=False,
    )


def test_setup_multi_agent_numeric_fallback(tmp_git_repo: Path):
    installed = [AGENTS["claude"], AGENTS["codex"]]
    with (
        mock.patch("mlflow.agent.setup.cli.detect_installed", return_value=installed),
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(setup, ["--print"], input="2\n3\nhttp://localhost:5001\nn\n2\n")
    assert result.exit_code == 0, result.stderr
    assert "Multiple agents detected" in result.stderr
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": "codex",
            "print_prompt": True,
            "skills_install_confirmed": False,
            "assistant_configured": False,
        },
        success=True,
    )


def test_setup_no_agents_detected(tmp_git_repo: Path):
    with (
        mock.patch("mlflow.agent.setup.cli.detect_installed", return_value=[]),
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(setup, ["--print"])
    assert result.exit_code != 0
    assert "No supported agent CLI found on PATH" in result.stderr
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": None,
            "print_prompt": True,
            "skills_install_confirmed": None,
            "assistant_configured": None,
        },
        success=False,
    )


def test_setup_records_failure_on_abort(tmp_git_repo: Path):
    with (
        mock.patch(
            "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
        ) as mock_which,
        mock.patch("mlflow.agent.setup.cli.arrow_select", side_effect=click.Abort) as mock_select,
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(setup, ["--agent", "claude", "--print"])
    assert result.exit_code != 0
    mock_which.assert_called()
    mock_select.assert_called_once()
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": "claude",
            "print_prompt": True,
            "skills_install_confirmed": None,
            "assistant_configured": None,
        },
        success=False,
    )


def test_setup_databricks_prompts_for_experiment_id(tmp_git_repo: Path):
    with mock.patch(
        "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
    ) as mock_which:
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input="2\n\n1234567890\n1\n",
        )
    assert result.exit_code == 0, result.stderr
    assert "Experiment ID, or path (auto-created if it doesn't exist)" in result.stderr
    assert "Configure the Databricks workspace" in result.stdout
    assert "MLFLOW_TRACKING_URI=databricks" in result.stdout
    assert "WorkspaceClient().current_user.me()" in result.stdout
    assert 'mlflow.set_experiment(experiment_id="1234567890")' in result.stdout
    assert "Start a local MLflow tracking server" not in result.stdout
    mock_which.assert_called()


def test_setup_databricks_resolves_existing_path_to_id(tmp_git_repo: Path):
    fake_exp = mock.Mock(experiment_id="9876543210")
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli.MlflowClient") as mock_client_cls,
    ):
        mock_client_cls.return_value.get_experiment_by_name.return_value = fake_exp
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input="2\n\n/Users/me/my-app\n1\n",
        )
    assert result.exit_code == 0, result.stderr
    mock_client_cls.return_value.get_experiment_by_name.assert_called_once_with("/Users/me/my-app")
    mock_client_cls.return_value.create_experiment.assert_not_called()
    assert 'mlflow.set_experiment(experiment_id="9876543210")' in result.stdout


def test_setup_databricks_creates_missing_path(tmp_git_repo: Path):
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli.MlflowClient") as mock_client_cls,
    ):
        mock_client_cls.return_value.get_experiment_by_name.return_value = None
        mock_client_cls.return_value.create_experiment.return_value = "5555555555"
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input="2\n\n/Users/me/new-app\n1\n",
        )
    assert result.exit_code == 0, result.stderr
    mock_client_cls.return_value.create_experiment.assert_called_once_with("/Users/me/new-app")
    assert "Created experiment '/Users/me/new-app' (ID 5555555555)." in result.stderr
    assert 'mlflow.set_experiment(experiment_id="5555555555")' in result.stdout


def test_setup_databricks_threads_profile_into_tracking_uri(tmp_git_repo: Path):
    with mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"):
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input="2\nmy-profile\n1234567890\n1\n",
        )
    assert result.exit_code == 0, result.stderr
    assert "MLFLOW_TRACKING_URI=databricks://my-profile" in result.stdout
    assert 'WorkspaceClient(profile="my-profile").current_user.me()' in result.stdout


@pytest.mark.parametrize(
    ("uri", "expected"),
    [
        ("http://127.0.0.1:5000", True),
        ("http://localhost:5000", True),
        ("localhost:5000", True),
        ("http://127.0.0.2:8080", True),
        ("http://[::1]:5000", True),
        ("http://example.com:5000", False),
        ("https://my-workspace.databricks.com", False),
        ("databricks", False),
        ("databricks://profile", False),
    ],
)
def test_is_localhost_tracking_uri(uri: str, expected: bool):
    assert _is_localhost_tracking_uri(uri) is expected


def test_setup_configures_assistant_when_accepted(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    config_path = tmp_git_repo / "assistant" / "config.json"
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch(
            "mlflow.agent.setup.cli.install_skills", return_value=["analyze-mlflow-trace"]
        ) as mock_install,
        mock.patch("mlflow.agent.setup.cli._record_event") as mock_record,
    ):
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\ny\n1\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "Enabled the MLflow Assistant (Claude Code)" in result.stderr
    # The Assistant installs its own skills, so the coding-agent project prompt is skipped.
    assert "Install MLflow skills at" not in result.stderr
    mock_install.assert_called_once_with(Path.home() / ".claude" / "skills")
    mock_record.assert_called_once_with(
        AgentSetupEvent,
        {
            "agent": "claude",
            "print_prompt": True,
            "skills_install_confirmed": None,
            "assistant_configured": True,
        },
        success=True,
    )

    saved = json.loads(config_path.read_text())
    provider = saved["providers"]["claude_code"]
    assert provider["selected"] is True
    assert provider["model"] == "default"
    assert provider["skills"]["type"] == "global"


def test_setup_assistant_maps_codex_to_codex_provider(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    config_path = tmp_git_repo / "assistant" / "config.json"
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/codex"),
        mock.patch("mlflow.agent.setup.cli.install_skills", return_value=[]) as mock_install,
    ):
        result = CliRunner().invoke(
            setup, ["--agent", "codex", "--print"], input="3\nhttp://127.0.0.1:5001\ny\n1\n"
        )
    assert result.exit_code == 0, result.stderr
    mock_install.assert_called_once_with(Path.home() / ".codex" / "skills")
    assert json.loads(config_path.read_text())["providers"]["codex"]["selected"] is True


def test_setup_assistant_installs_project_skills(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    config_path = tmp_git_repo / "assistant" / "config.json"
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli._git_root", return_value=(tmp_git_repo, None)),
        mock.patch("mlflow.agent.setup.cli.install_skills", return_value=[]) as mock_install,
    ):
        # Accept the Assistant, then pick "Project" (option 2) for the skills location.
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\ny\n2\n"
        )
    assert result.exit_code == 0, result.stderr
    mock_install.assert_called_once_with(tmp_git_repo / ".claude" / "skills")
    provider = json.loads(config_path.read_text())["providers"]["claude_code"]
    assert provider["selected"] is True
    assert provider["skills"]["type"] == "project"


def test_setup_assistant_installs_custom_skills(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    config_path = tmp_git_repo / "assistant" / "config.json"
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    custom_dir = tmp_git_repo / "my-skills"
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli.install_skills", return_value=[]) as mock_install,
    ):
        # Accept the Assistant, pick "Custom location" (option 3), then enter the path.
        result = CliRunner().invoke(
            setup,
            ["--agent", "claude", "--print"],
            input=f"3\nhttp://localhost:5001\ny\n3\n{custom_dir}\n",
        )
    assert result.exit_code == 0, result.stderr
    mock_install.assert_called_once_with(custom_dir)
    provider = json.loads(config_path.read_text())["providers"]["claude_code"]
    assert provider["selected"] is True
    assert provider["skills"]["type"] == "custom"
    assert provider["skills"]["custom_path"] == str(custom_dir)


def test_setup_assistant_preserves_existing_config(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    config_path = tmp_git_repo / "assistant" / "config.json"
    config_path.parent.mkdir(parents=True, exist_ok=True)
    config_path.write_text(
        json.dumps({
            "providers": {
                "claude_code": {
                    "model": "claude-sonnet-4-x",
                    "selected": False,
                    "skills": {"type": "project"},
                }
            }
        })
    )
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli.install_skills", return_value=[]) as mock_install,
    ):
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\ny\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "kept your existing configuration" in result.stderr
    # An already-configured provider is preserved, so skills are not reinstalled.
    mock_install.assert_not_called()

    provider = json.loads(config_path.read_text())["providers"]["claude_code"]
    assert provider["selected"] is True
    assert provider["model"] == "claude-sonnet-4-x"
    assert provider["skills"]["type"] == "project"


def test_setup_skips_assistant_when_declined(tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch):
    config_path = tmp_git_repo / "assistant" / "config.json"
    monkeypatch.setattr("mlflow.assistant.config.CONFIG_PATH", config_path)
    with (
        mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"),
        mock.patch("mlflow.agent.setup.cli.install_skills", return_value=[]) as mock_install,
    ):
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="3\nhttp://localhost:5001\nn\n2\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "help you in the MLflow UI" in result.stderr
    mock_install.assert_not_called()
    assert not config_path.exists()


def test_setup_does_not_offer_assistant_for_databricks(tmp_git_repo: Path):
    with mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"):
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="2\n\n1234567890\n2\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "help you in the MLflow UI" not in result.stderr


def test_setup_does_not_offer_assistant_for_opencode(tmp_git_repo: Path):
    with mock.patch("mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/opencode"):
        result = CliRunner().invoke(
            setup, ["--agent", "opencode", "--print"], input="3\nhttp://localhost:5001\n2\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "help you in the MLflow UI" not in result.stderr


def test_setup_uses_tracking_uri_from_env(tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch):
    monkeypatch.setenv("MLFLOW_TRACKING_URI", "http://my-server:5000")
    with mock.patch(
        "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
    ) as mock_which:
        result = CliRunner().invoke(setup, ["--agent", "claude", "--print"], input="1\n")
    assert result.exit_code == 0, result.stderr
    assert "Tracking backend:" not in result.stderr
    assert "MLFLOW_TRACKING_URI=http://my-server:5000" in result.stdout
    mock_which.assert_called()


def test_setup_env_databricks_still_prompts_for_experiment(
    tmp_git_repo: Path, monkeypatch: pytest.MonkeyPatch
):
    monkeypatch.setenv("MLFLOW_TRACKING_URI", "databricks")
    with mock.patch(
        "mlflow.agent.agents.shutil.which", return_value="/usr/local/bin/claude"
    ) as mock_which:
        result = CliRunner().invoke(
            setup, ["--agent", "claude", "--print"], input="1234567890\n1\n"
        )
    assert result.exit_code == 0, result.stderr
    assert "Tracking backend:" not in result.stderr
    assert "Experiment ID, or path (auto-created if it doesn't exist)" in result.stderr
    assert 'mlflow.set_experiment(experiment_id="1234567890")' in result.stdout
    mock_which.assert_called()