from pathlib import Path

from click.testing import CliRunner

from markitect_tool.cache import (
    build_cache,
    cache_path_for,
    detect_changes,
    fingerprint_file,
    load_cache,
    save_cache,
    scan_markdown_files,
)
from markitect_tool.cli import main


def test_fingerprint_file_records_hash_and_parse_summary(tmp_path: Path):
    source = tmp_path / "doc.md"
    source.write_text("# Title\n\nBody.\n", encoding="utf-8")

    entry = fingerprint_file(source, root=tmp_path)

    assert entry.path == "doc.md"
    assert entry.content_hash.startswith("sha256:")
    assert entry.headings == 1
    assert entry.sections == 1
    assert entry.blocks == 2


def test_build_cache_and_detect_changes(tmp_path: Path):
    one = tmp_path / "one.md"
    two = tmp_path / "two.md"
    one.write_text("# One\n", encoding="utf-8")
    two.write_text("# Two\n", encoding="utf-8")

    manifest = build_cache([tmp_path], root=tmp_path)
    assert sorted(manifest.entries) == ["one.md", "two.md"]

    status = detect_changes(manifest, [tmp_path], root=tmp_path)
    assert not status.dirty
    assert status.unchanged == ["one.md", "two.md"]

    one.write_text("# One\n\nChanged.\n", encoding="utf-8")
    two.unlink()
    three = tmp_path / "three.md"
    three.write_text("# Three\n", encoding="utf-8")

    status = detect_changes(manifest, [tmp_path], root=tmp_path)
    assert status.dirty
    assert status.changed == ["one.md"]
    assert status.deleted == ["two.md"]
    assert status.new == ["three.md"]


def test_save_and_load_cache_manifest(tmp_path: Path):
    source = tmp_path / "doc.md"
    source.write_text("# Doc\n", encoding="utf-8")
    manifest_path = cache_path_for(tmp_path)
    manifest = build_cache([source], root=tmp_path)

    save_cache(manifest, manifest_path)
    loaded = load_cache(manifest_path)

    assert loaded.entries["doc.md"].content_hash == manifest.entries["doc.md"].content_hash


def test_scan_markdown_files_skips_non_markdown(tmp_path: Path):
    (tmp_path / "doc.md").write_text("# Doc\n", encoding="utf-8")
    (tmp_path / "notes.txt").write_text("Nope\n", encoding="utf-8")
    nested = tmp_path / "nested"
    nested.mkdir()
    (nested / "other.markdown").write_text("# Other\n", encoding="utf-8")

    assert [path.name for path in scan_markdown_files([tmp_path])] == ["doc.md", "other.markdown"]
    assert [path.name for path in scan_markdown_files([tmp_path], recursive=False)] == ["doc.md"]


def test_mkt_cache_build_and_status(tmp_path: Path):
    source = tmp_path / "doc.md"
    source.write_text("# Doc\n", encoding="utf-8")
    runner = CliRunner()

    build = runner.invoke(main, ["cache", "build", str(tmp_path), "--root", str(tmp_path)])

    assert build.exit_code == 0
    assert "written: True" in build.output

    clean = runner.invoke(main, ["cache", "status", str(tmp_path), "--root", str(tmp_path)])
    assert clean.exit_code == 0
    assert "clean" in clean.output

    source.write_text("# Doc\n\nChanged.\n", encoding="utf-8")
    dirty = runner.invoke(main, ["cache", "status", str(tmp_path), "--root", str(tmp_path)])
    assert dirty.exit_code == 1
    assert "dirty" in dirty.output
    assert "changed: 1" in dirty.output


def test_mkt_cache_fingerprint_outputs_json(tmp_path: Path):
    source = tmp_path / "doc.md"
    source.write_text("# Doc\n", encoding="utf-8")

    result = CliRunner().invoke(
        main,
        ["cache", "fingerprint", str(source), "--root", str(tmp_path)],
    )

    assert result.exit_code == 0
    assert '"path": "doc.md"' in result.output
    assert '"content_hash": "sha256:' in result.output