"""Bootstrap CLI test (TASK-05-03) — mocked PgStore, no real Postgres.

Covers: create operator → exists; re-run → "already exists" (no update);
--update → password updated; missing env → exit 1; password is argon2id
(not plaintext).
"""

from __future__ import annotations

import importlib
import os
import sys
from unittest.mock import AsyncMock, MagicMock

import pytest


def _load_cli_module(monkeypatch, env: dict, update: bool = False):
    """Load scripts/create-operator.py as a module with a mocked asyncpg pool."""
    for k in ("PRAXIS_BOOTSTRAP_OPERATOR_USER", "PRAXIS_BOOTSTRAP_OPERATOR_PASS",
              "PRAXIS_PG_DSN"):
        monkeypatch.delenv(k, raising=False)
    for k, v in env.items():
        if v is None:
            monkeypatch.delenv(k, raising=False)
        else:
            monkeypatch.setenv(k, v)
    # Import the script as a module by path.
    import importlib.util
    spec = importlib.util.spec_from_file_location(
        "create_operator", "scripts/create-operator.py"
    )
    mod = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(mod)
    return mod


def _make_mock_pool_store(operators: dict[str, dict] | None = None):
    operators = operators if operators is not None else {}

    pool = MagicMock()
    pool.close = AsyncMock()

    conn = MagicMock()

    async def acquire_ctx():
        return conn

    cm = MagicMock()
    cm.__aenter__ = AsyncMock(return_value=conn)
    cm.__aexit__ = AsyncMock(return_value=None)
    pool.acquire = MagicMock(return_value=cm)

    store = MagicMock()

    async def insert_operator(username, password_hash, display_name, *, on_conflict_update=False):
        if on_conflict_update:
            operators[username] = {
                "id": "11111111-1111-1111-1111-111111111111",
                "username": username,
                "password_hash": password_hash,
            }
            return operators[username]["id"]
        if username in operators:
            return None  # already exists
        operators[username] = {
            "id": "11111111-1111-1111-1111-111111111111",
            "username": username,
            "password_hash": password_hash,
        }
        return operators[username]["id"]

    store.insert_operator = insert_operator
    return pool, store, operators


@pytest.mark.asyncio
async def test_create_operator_creates(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_USER": "admin",
        "PRAXIS_BOOTSTRAP_OPERATOR_PASS": "secret-pw",
        "PRAXIS_PG_DSN": "postgresql://praxis:x@localhost/praxis",
    }
    mod = _load_cli_module(monkeypatch, env)
    pool, store, operators = _make_mock_pool_store()

    import asyncpg
    async def fake_create_pool(**kw):
        return pool
    monkeypatch.setattr(asyncpg, "create_pool", fake_create_pool)

    from db.pg_migrate import apply_pg_migrations as _apm
    import db.pg_migrate
    async def fake_apply_migrations(p):
        return ["0001_operator_tier"]
    monkeypatch.setattr(db.pg_migrate, "apply_pg_migrations", fake_apply_migrations)

    import db.pg_store
    monkeypatch.setattr(db.pg_store, "PgStore", lambda p: store)

    rc = await mod.create_operator(update=False)
    assert rc == 0
    out = capsys.readouterr().out
    assert "created" in out
    assert "admin" in operators
    h = operators["admin"]["password_hash"]
    assert h.startswith("$argon2id$")
    assert "secret-pw" not in h  # not plaintext


@pytest.mark.asyncio
async def test_create_operator_already_exists(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_USER": "admin",
        "PRAXIS_BOOTSTRAP_OPERATOR_PASS": "secret-pw",
        "PRAXIS_PG_DSN": "postgresql://praxis:x@localhost/praxis",
    }
    mod = _load_cli_module(monkeypatch, env)
    pool, store, operators = _make_mock_pool_store({"admin": {
        "id": "id1", "username": "admin", "password_hash": "$argon2id$old"
    }})

    import asyncpg
    async def fake_create_pool(**kw):
        return pool
    monkeypatch.setattr(asyncpg, "create_pool", fake_create_pool)

    import db.pg_migrate
    async def fake_apply_migrations(p):
        return []
    monkeypatch.setattr(db.pg_migrate, "apply_pg_migrations", fake_apply_migrations)

    import db.pg_store
    monkeypatch.setattr(db.pg_store, "PgStore", lambda p: store)

    rc = await mod.create_operator(update=False)
    assert rc == 0
    out = capsys.readouterr().out
    assert "already exists" in out
    # password NOT updated
    assert operators["admin"]["password_hash"] == "$argon2id$old"


@pytest.mark.asyncio
async def test_create_operator_update_rehashes(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_USER": "admin",
        "PRAXIS_BOOTSTRAP_OPERATOR_PASS": "new-pw",
        "PRAXIS_PG_DSN": "postgresql://praxis:x@localhost/praxis",
    }
    mod = _load_cli_module(monkeypatch, env)
    pool, store, operators = _make_mock_pool_store({"admin": {
        "id": "id1", "username": "admin", "password_hash": "$argon2id$old"
    }})

    import asyncpg
    async def fake_create_pool(**kw):
        return pool
    monkeypatch.setattr(asyncpg, "create_pool", fake_create_pool)

    import db.pg_migrate
    async def fake_apply_migrations(p):
        return []
    monkeypatch.setattr(db.pg_migrate, "apply_pg_migrations", fake_apply_migrations)

    import db.pg_store
    monkeypatch.setattr(db.pg_store, "PgStore", lambda p: store)

    rc = await mod.create_operator(update=True)
    assert rc == 0
    out = capsys.readouterr().out
    assert "updated" in out
    assert operators["admin"]["password_hash"].startswith("$argon2id$")
    assert operators["admin"]["password_hash"] != "$argon2id$old"


@pytest.mark.asyncio
async def test_create_operator_missing_user_env(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_PASS": "x",
        "PRAXIS_PG_DSN": "postgresql://praxis:x@localhost/praxis",
    }
    mod = _load_cli_module(monkeypatch, env)
    rc = await mod.create_operator(update=False)
    assert rc == 1
    err = capsys.readouterr().err
    assert "PRAXIS_BOOTSTRAP_OPERATOR_USER" in err


@pytest.mark.asyncio
async def test_create_operator_missing_pass_env(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_USER": "admin",
        "PRAXIS_PG_DSN": "postgresql://praxis:x@localhost/praxis",
    }
    mod = _load_cli_module(monkeypatch, env)
    rc = await mod.create_operator(update=False)
    assert rc == 1


@pytest.mark.asyncio
async def test_create_operator_missing_dsn(monkeypatch, capsys):
    env = {
        "PRAXIS_BOOTSTRAP_OPERATOR_USER": "admin",
        "PRAXIS_BOOTSTRAP_OPERATOR_PASS": "x",
    }
    mod = _load_cli_module(monkeypatch, env)
    rc = await mod.create_operator(update=False)
    assert rc == 1
    err = capsys.readouterr().err
    assert "PRAXIS_PG_DSN" in err


def test_password_hash_is_argon2id():
    from argon2 import PasswordHasher
    h = PasswordHasher().hash("test")
    assert h.startswith("$argon2id$")