from __future__ import annotations

from pathlib import Path
from tempfile import TemporaryDirectory
import sys
import unittest

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT / "src"))

from uipath_explainator.pipeline import ProjectPipeline
from uipath_explainator.scanner import crawl_dependencies, extract_dependencies, strip_comment_out_blocks


MAIN_XAML = """<?xml version="1.0" encoding="utf-8"?>
<Activity xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:ui="http://schemas.uipath.com/workflow/activities">
  <Sequence>
    <ui:InvokeWorkflowFile WorkflowFileName="Flows/Active.xaml" />
    <ui:CommentOut>
      <Sequence>
        <ui:InvokeWorkflowFile WorkflowFileName="Flows/Old.xaml" />
      </Sequence>
    </ui:CommentOut>
  </Sequence>
</Activity>
"""

ACTIVE_XAML = """<?xml version="1.0" encoding="utf-8"?>
<Activity xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:ui="http://schemas.uipath.com/workflow/activities"
          xmlns:sap2010="http://schemas.microsoft.com/netfx/2010/xaml/activities/presentation">
  <Sequence>
    <ui:InvokeVBA>
      <ui:InvokeVBA.CodeFilePath>
        <InArgument x:TypeArguments="x:String">["Scripts/Keep.bas"]</InArgument>
      </ui:InvokeVBA.CodeFilePath>
    </ui:InvokeVBA>
  </Sequence>
</Activity>
"""

OLD_XAML = """<?xml version="1.0" encoding="utf-8"?>
<Activity xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities"
          xmlns:ui="http://schemas.uipath.com/workflow/activities">
  <Sequence>
    <ui:InvokeVBA CodeFilePath="Scripts/Drop.bas" />
  </Sequence>
</Activity>
"""


class StubAnalyzer:
    def analyze(self, relative_path: Path, content: str) -> str:
        return f"# {relative_path.as_posix()}\n\n{len(content)}"


class PipelineTests(unittest.TestCase):
    def test_strip_comment_out_blocks_removes_nested_blocks(self) -> None:
        source = "<root><ui:CommentOut><x/><ui:CommentOut><y/></ui:CommentOut></ui:CommentOut><z/></root>"
        cleaned = strip_comment_out_blocks(source)
        self.assertEqual(cleaned, "<root><z/></root>")

    def test_extract_dependencies_reads_property_element_paths(self) -> None:
        with TemporaryDirectory() as tmp:
            root = Path(tmp)
            flows = root / "Flows"
            flows.mkdir()
            (root / "Main.xaml").write_text(ACTIVE_XAML, encoding="utf-8")
            (root / "Scripts").mkdir()
            (root / "Scripts" / "Keep.bas").write_text("Sub Keep()", encoding="utf-8")

            dependencies, warnings = extract_dependencies(root, root / "Main.xaml")

            self.assertEqual(len(warnings), 0)
            self.assertEqual(len(dependencies), 1)
            self.assertEqual(dependencies[0].target, root / "Scripts" / "Keep.bas")

    def test_pipeline_prunes_files_only_reachable_before_comment_cleanup(self) -> None:
        with TemporaryDirectory() as tmp:
            tmp_path = Path(tmp)
            project_root = tmp_path / "project"
            output_root = tmp_path / "workspace"
            (project_root / "Flows").mkdir(parents=True)
            (project_root / "Flows" / "Active.xaml").write_text(ACTIVE_XAML, encoding="utf-8")
            (project_root / "Flows" / "Old.xaml").write_text(OLD_XAML, encoding="utf-8")
            (project_root / "Scripts").mkdir()
            (project_root / "Scripts" / "Keep.bas").write_text("Sub Keep()\nEnd Sub", encoding="utf-8")
            (project_root / "Scripts" / "Drop.bas").write_text("Sub Drop()\nEnd Sub", encoding="utf-8")
            (project_root / "main.xaml").write_text(MAIN_XAML, encoding="utf-8")

            initial_scan = crawl_dependencies(project_root, project_root / "main.xaml")
            initial_files = {path.relative_to(project_root).as_posix() for path in initial_scan.files}
            self.assertIn("Flows/Old.xaml", initial_files)
            self.assertIn("Scripts/Drop.bas", initial_files)

            report = ProjectPipeline(project_root, output_root, "main.xaml", force=True).run(StubAnalyzer())

            final_files = {path.as_posix() for path in report.final_files}
            self.assertIn("main.xaml", final_files)
            self.assertIn("Flows/Active.xaml", final_files)
            self.assertIn("Scripts/Keep.bas", final_files)
            self.assertNotIn("Flows/Old.xaml", final_files)
            self.assertNotIn("Scripts/Drop.bas", final_files)
            self.assertFalse((output_root / "Flows" / "Old.xaml").exists())
            self.assertFalse((output_root / "Scripts" / "Drop.bas").exists())
            self.assertTrue((output_root / "Flows" / "Active.xaml.analysis.md").exists())

            overview = (output_root / "OVERVIEW.md").read_text(encoding="utf-8")
            self.assertIn("## Processing Logic", overview)
            self.assertIn("Initial Scan", overview)
            self.assertIn("## How To Read This Output", overview)
            self.assertIn("## Cleaned XAML Files", overview)


if __name__ == "__main__":
    unittest.main()