"""Tests for flow.commands.dotfiles discovery and path resolution."""

import pytest

from flow.commands.dotfiles import _collect_home_specs, _discover_packages, _resolve_edit_target, _walk_package
from flow.core.config import AppConfig, FlowContext
from flow.core.console import ConsoleLogger
from flow.core.platform import PlatformInfo


def _make_tree(tmp_path):
    flow_root = tmp_path
    shared = flow_root / "_shared"
    (shared / "zsh").mkdir(parents=True)
    (shared / "zsh" / ".zshrc").write_text("# zsh")
    (shared / "tmux").mkdir(parents=True)
    (shared / "tmux" / ".tmux.conf").write_text("# tmux")

    profile = flow_root / "work"
    (profile / "git").mkdir(parents=True)
    (profile / "git" / ".gitconfig").write_text("[user]\nname = Work")

    return tmp_path


def _ctx() -> FlowContext:
    return FlowContext(
        config=AppConfig(),
        manifest={"profiles": {"work": {"os": "linux", "configs": {"skip": []}}}},
        platform=PlatformInfo(os="linux", arch="x64", platform="linux-x64"),
        console=ConsoleLogger(),
    )


def test_discover_packages_shared_only(tmp_path):
    tree = _make_tree(tmp_path)
    packages = _discover_packages(tree)
    assert "zsh" in packages
    assert "tmux" in packages
    assert "git" not in packages


def test_discover_packages_with_profile(tmp_path):
    tree = _make_tree(tmp_path)
    packages = _discover_packages(tree, profile="work")
    assert "zsh" in packages
    assert "tmux" in packages
    assert "git" in packages


def test_discover_packages_profile_overrides_shared(tmp_path):
    tree = _make_tree(tmp_path)
    profile_zsh = tree / "work" / "zsh"
    profile_zsh.mkdir(parents=True)
    (profile_zsh / ".zshrc").write_text("# work zsh")

    with pytest.raises(RuntimeError, match="Conflicting dotfile targets"):
        _collect_home_specs(_ctx(), tree, tmp_path / "home", "work", set(), None)


def test_walk_package_returns_relative_paths(tmp_path):
    tree = _make_tree(tmp_path)
    source = tree / "_shared" / "zsh"

    pairs = list(_walk_package(source))
    assert len(pairs) == 1
    src, rel = pairs[0]
    assert src.name == ".zshrc"
    assert str(rel) == ".zshrc"


def test_resolve_edit_target_package(tmp_path):
    tree = _make_tree(tmp_path)
    target = _resolve_edit_target("zsh", dotfiles_dir=tree)
    assert target == tree / "_shared" / "zsh"


def test_resolve_edit_target_repo_path(tmp_path):
    tree = _make_tree(tmp_path)
    target = _resolve_edit_target("_shared/zsh/.zshrc", dotfiles_dir=tree)
    assert target == tree / "_shared" / "zsh" / ".zshrc"


def test_resolve_edit_target_rejects_parent_traversal(tmp_path):
    tree = _make_tree(tmp_path / "repo")
    outside = tmp_path / "outside.txt"
    outside.write_text("secret")

    target = _resolve_edit_target("../outside.txt", dotfiles_dir=tree)
    assert target is None


def test_resolve_edit_target_rejects_nested_repo_escape(tmp_path):
    tree = _make_tree(tmp_path / "repo")
    outside = tmp_path / "escape.txt"
    outside.write_text("secret")

    target = _resolve_edit_target("_shared/../../escape.txt", dotfiles_dir=tree)
    assert target is None


def test_resolve_edit_target_missing_returns_none(tmp_path):
    tree = _make_tree(tmp_path)
    assert _resolve_edit_target("does-not-exist", dotfiles_dir=tree) is None