import textwrap

from scripts.hcl_diff import find_resource_blocks, touched_resources


def test_finds_resource_block_spans(tmp_path):
    body = textwrap.dedent("""\
    variable "x" { default = 1 }

    resource "aws_s3_bucket" "a" {
      bucket = "x"
    }

    resource "aws_iam_role" "b" {
      name = "y"
      assume_role_policy = "..."
    }
    """)
    f = tmp_path / "main.tf"
    f.write_text(body)
    blocks = find_resource_blocks(f)
    by_name = {b.name: b for b in blocks}
    assert by_name["a"].type == "aws_s3_bucket"
    assert by_name["a"].start <= 3 <= by_name["a"].end
    assert by_name["b"].type == "aws_iam_role"
    assert by_name["b"].start <= 7 <= by_name["b"].end


def test_touched_resources_intersects(tmp_path):
    body = textwrap.dedent("""\
    resource "aws_s3_bucket" "a" {
      bucket = "x"
    }

    resource "aws_iam_role" "b" {
      name = "y"
    }
    """)
    f = tmp_path / "main.tf"
    f.write_text(body)
    hits = touched_resources(f, added_ranges=[(6, 6)])
    assert len(hits) == 1
    assert hits[0].type == "aws_iam_role"
    assert hits[0].name == "b"


def test_touched_resources_ignores_data_blocks(tmp_path):
    body = textwrap.dedent("""\
    data "aws_caller_identity" "current" {}
    """)
    f = tmp_path / "main.tf"
    f.write_text(body)
    hits = touched_resources(f, added_ranges=[(1, 1)])
    assert hits == []


def test_touched_resources_empty_when_no_overlap(tmp_path):
    body = textwrap.dedent("""\
    resource "aws_s3_bucket" "a" {
      bucket = "x"
    }
    """)
    f = tmp_path / "main.tf"
    f.write_text(body)
    assert touched_resources(f, added_ranges=[(10, 12)]) == []