"""Tests for the file store (read/write users, permissions, config)."""

import stat

import pytest

from local_identity.store import (
    init_dirs,
    store_exists,
    write_user,
    read_user,
    list_users,
    read_config,
    write_config,
    _users_dir,
    _store_dir,
)
from local_identity.user import UserRecord, make_test_user

ALICE = UserRecord(username="alice", fullname="Alice Smith", email="alice@example.com")
BOB = UserRecord(username="bob", fullname="Bob Jones", email="bob@example.com")


class TestDirInit:
    def test_creates_store_dir(self, tmp_store):
        assert not tmp_store.exists()
        init_dirs()
        assert tmp_store.exists()

    def test_store_dir_mode_700(self, tmp_store):
        init_dirs()
        mode = stat.S_IMODE(tmp_store.stat().st_mode)
        assert mode == 0o700, f"expected 0o700, got 0o{mode:03o}"

    def test_users_dir_mode_700(self, tmp_store):
        init_dirs()
        users = tmp_store / "users"
        mode = stat.S_IMODE(users.stat().st_mode)
        assert mode == 0o700, f"expected 0o700, got 0o{mode:03o}"

    def test_idempotent(self, tmp_store):
        init_dirs()
        init_dirs()  # should not raise
        assert tmp_store.exists()

    def test_store_exists_false_before_init(self, tmp_store):
        assert not store_exists()

    def test_store_exists_true_after_init(self, tmp_store):
        init_dirs()
        assert store_exists()


class TestWriteReadUser:
    def test_roundtrip(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        loaded = read_user("alice")
        assert loaded.username == "alice"
        assert loaded.fullname == "Alice Smith"
        assert loaded.email == "alice@example.com"

    def test_file_mode_600(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        path = _users_dir() / "alice.yaml"
        mode = stat.S_IMODE(path.stat().st_mode)
        assert mode == 0o600, f"expected 0o600, got 0o{mode:03o}"

    def test_overwrite_same_user(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        updated = UserRecord(username="alice", fullname="Alice Updated", email="alice@example.com")
        write_user(updated)
        assert read_user("alice").fullname == "Alice Updated"

    def test_read_nonexistent_raises(self, tmp_store):
        init_dirs()
        with pytest.raises(FileNotFoundError, match="nobody"):
            read_user("nobody")


class TestListUsers:
    def test_empty_store(self, tmp_store):
        init_dirs()
        assert list_users() == []

    def test_lists_all_users(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        write_user(BOB)
        usernames = {u.username for u in list_users()}
        assert usernames == {"alice", "bob"}

    def test_includes_test_users(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        write_user(make_test_user(ALICE, 1))
        write_user(make_test_user(ALICE, 2))
        usernames = {u.username for u in list_users()}
        assert usernames == {"alice", "alice1", "alice2"}

    def test_sorted_by_filename(self, tmp_store):
        init_dirs()
        write_user(BOB)
        write_user(ALICE)
        names = [u.username for u in list_users()]
        assert names == sorted(names)


class TestConfig:
    def test_read_config_empty(self, tmp_store):
        init_dirs()
        assert read_config() == {}

    def test_write_read_config(self, tmp_store):
        init_dirs()
        write_config({"email": "tegwick@example.com"})
        assert read_config()["email"] == "tegwick@example.com"

    def test_config_mode_600(self, tmp_store):
        init_dirs()
        write_config({"email": "x@y.com"})
        from local_identity.store import _config_file
        mode = stat.S_IMODE(_config_file().stat().st_mode)
        assert mode == 0o600


class TestIdempotency:
    def test_reinit_produces_same_users(self, tmp_store):
        init_dirs()
        write_user(ALICE)
        write_user(make_test_user(ALICE, 1))
        write_user(make_test_user(ALICE, 2))

        # Simulate --force re-init with same inputs
        init_dirs()
        write_user(ALICE)
        write_user(make_test_user(ALICE, 1))
        write_user(make_test_user(ALICE, 2))

        users = {u.username: u for u in list_users()}
        assert set(users.keys()) == {"alice", "alice1", "alice2"}
        assert users["alice1"].source_user == "alice"
        assert users["alice1"].email == "alice+test1@example.com"