"""Tests for adapters/terraform/adapter.py — REQ-25."""

import sys
from pathlib import Path

import pytest

from adapters.terraform.adapter import adapt, _tf_value


def _stack(resources):
    return {
        "contract_id": "test", "contract_name": "Test", "environment": "dev",
        "resources": resources,
    }


class TestAdapt:
    def test_single_resource(self, repo_root):
        stack = _stack([
            {"module": "s3", "version": "1.0.0",
             "inputs": {"bucket_name": "test-bucket", "enabled": True}},
        ])
        hcl = adapt(stack, repo_root)
        assert 'module "s3" {' in hcl
        assert 'source = ' in hcl
        assert 'bucket_name = "test-bucket"' in hcl
        assert "enabled = true" in hcl

    def test_multi_resource(self, repo_root):
        stack = _stack([
            {"module": "s3", "version": "1.0.0",
             "inputs": {"bucket_name": "b1", "enabled": True}},
            {"module": "vpc", "version": "1.0.0",
             "inputs": {"cidr": "10.0.0.0/16"}},
        ])
        hcl = adapt(stack, repo_root)
        assert 'module "s3" {' in hcl
        assert 'module "vpc" {' in hcl

    def test_input_passthrough_scalar(self, repo_root):
        stack = _stack([
            {"module": "s3", "version": "1.0.0",
             "inputs": {"bucket_name": "my-bucket", "region": "us-east-1"}},
        ])
        hcl = adapt(stack, repo_root)
        assert 'bucket_name = "my-bucket"' in hcl
        assert "us-east-1" not in hcl.split("inputs")[0] if "inputs" in hcl else True
        # region is skipped (provider-level)

    def test_input_passthrough_list(self, repo_root):
        stack = _stack([
            {"module": "vpc", "version": "1.0.0",
             "inputs": {"azs": ["us-east-1a", "us-east-1b"]}},
        ])
        hcl = adapt(stack, repo_root)
        assert 'azs = ["us-east-1a", "us-east-1b"]' in hcl

    def test_input_passthrough_number(self, repo_root):
        stack = _stack([
            {"module": "vpc", "version": "1.0.0",
             "inputs": {"desired_count": 3}},
        ])
        hcl = adapt(stack, repo_root)
        assert "desired_count = 3" in hcl

    def test_hcl_validity_balanced_braces(self, repo_root):
        stack = _stack([
            {"module": "s3", "version": "1.0.0",
             "inputs": {"bucket_name": "b", "enabled": True}},
        ])
        hcl = adapt(stack, repo_root)
        assert hcl.count("{") == hcl.count("}")

    def test_unknown_module_raises(self, repo_root):
        stack = _stack([
            {"module": "nonexistent", "version": "1.0.0", "inputs": {}},
        ])
        with pytest.raises(ValueError, match="no terraform_dir"):
            adapt(stack, repo_root)


class TestTfValue:
    def test_bool(self):
        assert _tf_value(True) == "true"
        assert _tf_value(False) == "false"

    def test_int(self):
        assert _tf_value(42) == "42"

    def test_string(self):
        assert _tf_value("hello") == '"hello"'

    def test_list(self):
        assert _tf_value(["a", "b"]) == '["a", "b"]'