"""Tests for configuration layer."""

import os
from pathlib import Path

import pytest

from ai_orchestrator.config import (
    ServiceConfig,
    build_config,
    expand_path,
    resolve_env_var,
    validate_dispatch_config,
)


class TestResolveEnvVar:
    """Tests for environment variable resolution."""

    def test_resolves_env_var(self, monkeypatch):
        monkeypatch.setenv("MY_TOKEN", "secret123")
        assert resolve_env_var("$MY_TOKEN") == "secret123"

    def test_missing_env_var_returns_empty(self, monkeypatch):
        monkeypatch.delenv("NONEXISTENT_VAR", raising=False)
        assert resolve_env_var("$NONEXISTENT_VAR") == ""

    def test_literal_value_unchanged(self):
        assert resolve_env_var("literal_value") == "literal_value"

    def test_non_string_passthrough(self):
        assert resolve_env_var(123) == 123  # type: ignore


class TestExpandPath:
    """Tests for path expansion."""

    def test_tilde_expansion(self, tmp_path):
        result = expand_path("~/workspaces", tmp_path)
        assert str(Path.home()) in result

    def test_relative_path_resolved(self, tmp_path):
        result = expand_path("./workspaces", tmp_path)
        assert str(tmp_path) in result

    def test_absolute_path_unchanged(self, tmp_path):
        if os.name == "nt":
            result = expand_path("C:\\workspaces", tmp_path)
            assert "C:\\" in result
        else:
            result = expand_path("/tmp/workspaces", tmp_path)
            assert result.startswith("/tmp")

    def test_empty_uses_default(self, tmp_path):
        result = expand_path("", tmp_path)
        assert "symphony_workspaces" in result


class TestBuildConfig:
    """Tests for building typed config from raw dict."""

    def test_defaults_applied(self, tmp_path):
        config = build_config({}, tmp_path)
        assert config.polling.interval_ms == 30000
        assert config.agent.max_concurrent_agents == 10
        assert config.agent.max_turns == 20
        assert config.codex.command == "codex app-server"
        assert config.codex.turn_timeout_ms == 3600000
        assert config.hooks.timeout_ms == 60000

    def test_tracker_config(self, tmp_path, monkeypatch):
        monkeypatch.setenv("LINEAR_API_KEY", "test-key")
        raw = {
            "tracker": {
                "kind": "linear",
                "project_slug": "my-proj",
                "active_states": ["Ready", "Working"],
            }
        }
        config = build_config(raw, tmp_path)
        assert config.tracker.kind == "linear"
        assert config.tracker.project_slug == "my-proj"
        assert config.tracker.api_key == "test-key"
        assert config.tracker.active_states == ["Ready", "Working"]
        assert config.tracker.endpoint == "https://api.linear.app/graphql"

    def test_per_state_concurrency_normalization(self, tmp_path):
        raw = {
            "agent": {
                "max_concurrent_agents_by_state": {
                    "In Progress": 3,
                    "Todo": "invalid",
                    "Review": -1,
                }
            }
        }
        config = build_config(raw, tmp_path)
        # Only valid positive entries kept, normalized to lowercase
        assert config.agent.max_concurrent_agents_by_state == {"in progress": 3}


class TestValidateDispatchConfig:
    """Tests for dispatch config validation."""

    def test_valid_config(self, tmp_path, monkeypatch):
        monkeypatch.setenv("LINEAR_API_KEY", "test-key")
        raw = {
            "tracker": {"kind": "linear", "project_slug": "proj"},
        }
        config = build_config(raw, tmp_path)
        errors = validate_dispatch_config(config)
        assert errors == []

    def test_missing_tracker_kind(self, tmp_path):
        config = build_config({}, tmp_path)
        errors = validate_dispatch_config(config)
        assert any("tracker.kind" in e for e in errors)

    def test_unsupported_tracker_kind(self, tmp_path, monkeypatch):
        monkeypatch.setenv("LINEAR_API_KEY", "key")
        raw = {"tracker": {"kind": "jira", "project_slug": "x"}}
        config = build_config(raw, tmp_path)
        errors = validate_dispatch_config(config)
        assert any("Unsupported" in e for e in errors)

    def test_missing_api_key(self, tmp_path, monkeypatch):
        monkeypatch.delenv("LINEAR_API_KEY", raising=False)
        raw = {"tracker": {"kind": "linear", "project_slug": "x"}}
        config = build_config(raw, tmp_path)
        errors = validate_dispatch_config(config)
        assert any("api_key" in e for e in errors)

    def test_missing_project_slug(self, tmp_path, monkeypatch):
        monkeypatch.setenv("LINEAR_API_KEY", "key")
        raw = {"tracker": {"kind": "linear"}}
        config = build_config(raw, tmp_path)
        errors = validate_dispatch_config(config)
        assert any("project_slug" in e for e in errors)