"""Unit tests for runner/harness/deps.py (Phase 2 §4.2 / Q2.3).

Pure-Python: no real deploys. Tests the declarative parts of the dep resolver — declared_deps
reading from `tests/<recipe>/recipe_meta.py`, the per-dep domain derivation, and write/load of the
run state file. The deploy_deps + teardown_deps integration is exercised by real e2e against cc-ci
(Q2.4 acceptance).
"""

from __future__ import annotations

import os
import sys

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
from harness import deps  # noqa: E402


def test_declared_deps_returns_empty_for_no_meta(monkeypatch, tmp_path):
    """A recipe with no recipe_meta.py returns []."""
    fake_recipe = "ccci-no-meta"
    # No file at tests/<fake_recipe>/recipe_meta.py -> declared_deps reads nothing -> []
    monkeypatch.chdir(tmp_path)
    assert deps.declared_deps(fake_recipe) == []


def test_declared_deps_reads_DEPS_list(tmp_path, monkeypatch):
    """A recipe_meta.py with `DEPS = [...]` returns the list."""
    fake_recipe = "ccci-with-deps"
    # Build a fake repo layout under tmp_path
    recipe_dir = tmp_path / "tests" / fake_recipe
    recipe_dir.mkdir(parents=True)
    (recipe_dir / "recipe_meta.py").write_text('HEALTH_PATH = "/"\nDEPS = ["keycloak", "redis"]\n')
    # Patch the deps module's idea of "where the repo is" by monkey-patching __file__ for the
    # function indirectly: declared_deps uses `os.path.dirname(__file__), "..", "..", "tests"` —
    # which resolves to the real repo's `tests/`. So instead, override that with a symlink/dir
    # under tmp_path: deps.__file__ points at the runner module. We can't easily relocate that.
    # Instead, mock the path by writing the fake recipe under the REAL tests/ dir.
    real_tests = os.path.join(os.path.dirname(deps.__file__), "..", "..", "tests")
    target_dir = os.path.join(real_tests, fake_recipe)
    os.makedirs(target_dir, exist_ok=True)
    target_meta = os.path.join(target_dir, "recipe_meta.py")
    try:
        with open(target_meta, "w") as f:
            f.write('DEPS = ["keycloak", "redis"]\n')
        result = deps.declared_deps(fake_recipe)
        assert result == ["keycloak", "redis"]
    finally:
        if os.path.exists(target_meta):
            os.remove(target_meta)
        if os.path.isdir(target_dir):
            os.rmdir(target_dir)


def test_dep_domain_distinct_per_dep():
    """Two deps of different kinds (same parent/pr/ref) get distinct per-run domains."""
    parent = "lasuite-docs"
    pr = "42"
    ref = "abc123"
    d1 = deps.dep_domain(parent, pr, ref, "keycloak")
    d2 = deps.dep_domain(parent, pr, ref, "redis")
    assert d1 != d2
    # Both must look like the standard run-app pattern: <recipe[:4]>-<6hex>.ci.commoninternet.net
    assert d1.endswith(".ci.commoninternet.net")
    assert d2.endswith(".ci.commoninternet.net")
    # The hash is determined by (parent, pr, ref, dep) — same inputs = same domain (idempotent)
    assert deps.dep_domain(parent, pr, ref, "keycloak") == d1


def test_dep_domain_distinct_per_parent():
    """The same dep deployed by two different parent recipes (same dep, pr, ref) gets distinct
    domains — proves the dep is parent-scoped not just dep-name-scoped."""
    d1 = deps.dep_domain("lasuite-docs", "42", "abc", "keycloak")
    d2 = deps.dep_domain("cryptpad", "42", "abc", "keycloak")
    assert d1 != d2


def test_write_and_load_run_state(tmp_path, monkeypatch):
    """write_run_state writes JSON to $CCCI_DEPS_FILE; load_run_state reads it back."""
    state_path = tmp_path / "deps.json"
    monkeypatch.setenv("CCCI_DEPS_FILE", str(state_path))
    state = [
        {"recipe": "keycloak", "domain": "kc-deadbe.ci.commoninternet.net"},
        {"recipe": "redis", "domain": "redi-abc123.ci.commoninternet.net"},
    ]
    deps.write_run_state(state)
    loaded = deps.load_run_state()
    assert loaded == state


def test_load_run_state_missing_env_returns_empty(monkeypatch):
    """No $CCCI_DEPS_FILE -> empty list."""
    monkeypatch.delenv("CCCI_DEPS_FILE", raising=False)
    assert deps.load_run_state() == []


def test_write_run_state_no_env_is_noop(monkeypatch):
    """write_run_state silently no-ops without $CCCI_DEPS_FILE (so standalone helper use doesn't
    require setting up the env)."""
    monkeypatch.delenv("CCCI_DEPS_FILE", raising=False)
    deps.write_run_state([{"recipe": "x", "domain": "y"}])  # must not raise