"""M2 — Dashboard-Backend tests.

Personal dashboards: per-user dashboards with tabs, JSONB layout,
CRUD + set-default endpoints (owner-only, saved_views precedent),
lazy default seed from the MiniApp registry (permission-filtered),
RLS fail-closed with the 0090 pattern (crm_api + crm_worker), and a
convergent fix for the Phase L policies that were created with only
crm_api (measured live on production 2026-08-30).
"""

from __future__ import annotations

import os
import uuid

import pytest
from httpx import AsyncClient
from pydantic import ValidationError
from sqlalchemy import text
from sqlalchemy.ext.asyncio import AsyncSession

from tests.conftest import ORIGIN_HEADER, login_client, seed_tenant_and_users

os.environ.setdefault("RLS_TEST_ADMIN_DB_URL", "postgresql+asyncpg://postgres@localhost:5432/leocrm_test")


@pytest.fixture(autouse=True)
def _clean_miniapp_registry():
    """Fresh MiniApp registry per test (same pattern as test_miniapp_registry)."""
    from app.plugins.miniapp_registry import reset_miniapp_registry

    reset_miniapp_registry()
    yield
    reset_miniapp_registry()


def _register_apps(*specs: tuple[str, str, int, int]) -> None:
    """Register test MiniApps: (app_id, permission, order, col_span)."""
    from app.plugins.miniapp_registry import get_miniapp_registry

    reg = get_miniapp_registry()
    for app_id, permission, order, col_span in specs:
        reg.register(
            app_id=app_id,
            name=app_id.replace("_", " ").title(),
            plugin_name="test",
            permission=permission,
            col_span=col_span,
            row_span=1,
            hosts=["chat", "dashboard", "window"],
            order=order,
        )


async def _make_user_with_dashboard_perms(db_session: AsyncSession, seed: dict, email: str, role_name: str):
    """Create a tenant-A user whose role grants only dashboard:read/write."""
    from app.core.auth import hash_password
    from app.models.role import Role
    from app.models.user import User, UserTenant

    user = User(
        email=email,
        name=email.split("@")[0].title(),
        password_hash=hash_password("TestPass123!"),
        is_active=True,
        preferences={},
    )
    db_session.add(user)
    await db_session.flush()
    role = Role(
        tenant_id=seed["tenant_a"].id,
        name=role_name,
        permissions={"dashboard": {"read": True, "write": True}},
        denied_permissions=[],
        field_permissions={},
    )
    db_session.add(role)
    await db_session.flush()
    db_session.add(
        UserTenant(
            user_id=user.id,
            tenant_id=seed["tenant_a"].id,
            is_default=True,
            role=role_name,
            role_id=role.id,
        )
    )
    await db_session.commit()
    return user


# ═══════════════════════════════════════════════════════════════
# Unit: model, permissions, layout validation
# ═══════════════════════════════════════════════════════════════


class TestModelUnit:
    def test_dashboard_model_importable(self):
        from app.models.dashboard import Dashboard

        assert Dashboard.__tablename__ == "dashboards"

    def test_dashboard_model_in_models_package(self):
        import app.models as m
        from app.models.dashboard import Dashboard

        assert m.Dashboard is Dashboard
        assert "Dashboard" in m.__all__

    def test_dashboard_permissions_registered_in_core(self):
        """dashboard:read/write must be valid core permissions (phantom fix).

        Before M2, app/routes/dashboard.py required ``dashboard:read`` but it
        was registered nowhere — non-admin users could never be granted it.
        """
        from app.core.permission_registry import (
            CORE_PERMISSIONS,
            PermissionRegistry,
        )

        keys = {p["key"] for p in CORE_PERMISSIONS}
        assert "dashboard:read" in keys
        assert "dashboard:write" in keys
        reg = PermissionRegistry()
        reg.initialize()
        assert reg.is_valid("dashboard:read")
        assert reg.is_valid("dashboard:write")


class TestLayoutValidation:
    def test_valid_layout(self):
        from app.schemas.dashboard import DashboardLayout
        layout = DashboardLayout.model_validate(
            {
                "version": 1,
                "tabs": [
                    {
                        "id": "tab-1",
                        "name": "Start",
                        "widgets": [
                            {
                                "app_id": "recent_contacts",
                                "settings": {"limit": 5},
                                "col": 0,
                                "row": 0,
                                "col_span": 2,
                                "row_span": 1,
                            }
                        ],
                    }
                ],
            }
        )
        assert layout.tabs[0].widgets[0].app_id == "recent_contacts"

    def test_empty_layout_ok(self):
        from app.schemas.dashboard import DashboardLayout
        layout = DashboardLayout.model_validate({"version": 1, "tabs": []})
        assert layout.tabs == []

    def test_invalid_span_rejected(self):
        from app.schemas.dashboard import DashboardLayout
        with pytest.raises(ValidationError):
            DashboardLayout.model_validate(
                {
                    "version": 1,
                    "tabs": [
                        {"id": "t", "name": "T", "widgets": [{"app_id": "a", "col_span": 13}]}
                    ],
                }
            )
        with pytest.raises(ValidationError):
            DashboardLayout.model_validate(
                {
                    "version": 1,
                    "tabs": [{"id": "t", "name": "T", "widgets": [{"app_id": "a", "col_span": 0}]}],
                }
            )

    def test_negative_col_rejected(self):
        from app.schemas.dashboard import DashboardLayout
        with pytest.raises(ValidationError):
            DashboardLayout.model_validate(
                {
                    "version": 1,
                    "tabs": [{"id": "t", "name": "T", "widgets": [{"app_id": "a", "col": -1}]}],
                }
            )

    def test_missing_app_id_rejected(self):
        from app.schemas.dashboard import DashboardLayout
        with pytest.raises(ValidationError):
            DashboardLayout.model_validate(
                {"version": 1, "tabs": [{"id": "t", "name": "T", "widgets": [{"col": 0, "row": 0}]}]}
            )


# ═══════════════════════════════════════════════════════════════
# API: CRUD + defaults + ownership
# ═══════════════════════════════════════════════════════════════


@pytest.mark.asyncio
class TestDashboardCrud:
    async def test_requires_auth(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 401

    async def test_requires_dashboard_read_permission(self, client: AsyncClient, db_session):
        """Viewer role has no dashboard:read -> 403 (permission enforced)."""
        await seed_tenant_and_users(db_session)
        await login_client(client, "viewer@tenanta.com")
        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 403

    async def test_create_and_list(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        resp = await client.post(
            "/api/v1/dashboards",
            json={"name": "Vertrieb"},
            headers=ORIGIN_HEADER,
        )
        assert resp.status_code == 201, resp.text
        data = resp.json()
        assert data["name"] == "Vertrieb"
        assert data["is_default"] is True  # first dashboard becomes default
        assert data["layout"]["version"] == 1
        tabs = data["layout"]["tabs"]
        assert len(tabs) == 1  # new dashboards start with an empty "Start" tab
        assert tabs[0]["name"] == "Start"
        assert tabs[0]["widgets"] == []

        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        assert len(resp.json()) == 1

    async def test_lazy_seed_on_first_list(self, client: AsyncClient, db_session):
        """First GET seeds a default dashboard from the registry (order-sorted).

        Seed layout is a 12-column flow: widgets are placed side by side in
        registry order and wrap to the next row when the row is full.
        """
        await seed_tenant_and_users(db_session)
        _register_apps(
            ("app_b", "", 20, 2),
            ("app_a", "", 10, 2),
            ("app_wide", "", 30, 12),
        )
        await login_client(client, "admin@tenanta.com")

        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        items = resp.json()
        assert len(items) == 1
        seeded = items[0]
        assert seeded["is_default"] is True
        widgets = seeded["layout"]["tabs"][0]["widgets"]
        app_ids = [w["app_id"] for w in widgets]
        assert app_ids == ["app_a", "app_b", "app_wide"]  # registry order
        assert widgets[0]["col_span"] == 2
        assert widgets[0]["col"] == 0 and widgets[0]["row"] == 0
        assert widgets[1]["col"] == 2 and widgets[1]["row"] == 0
        assert widgets[2]["col"] == 0 and widgets[2]["row"] == 1  # 12-span wraps

    async def test_seed_filters_by_permission(self, client: AsyncClient, db_session):
        """Seed only includes MiniApps the user may see (fail-closed filter)."""
        seed = await seed_tenant_and_users(db_session)
        _register_apps(
            ("open_app", "", 10, 1),
            ("tasks_app", "tasks:read", 20, 1),
        )
        await _make_user_with_dashboard_perms(db_session, seed, "dash@tenanta.com", "dash_only")

        await login_client(client, "dash@tenanta.com")
        resp = await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        widgets = resp.json()[0]["layout"]["tabs"][0]["widgets"]
        app_ids = {w["app_id"] for w in widgets}
        assert "open_app" in app_ids
        assert "tasks_app" not in app_ids  # no tasks:read -> filtered out

    async def test_duplicate_name_409(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")
        body = {"name": "Vertrieb"}
        r1 = await client.post("/api/v1/dashboards", json=body, headers=ORIGIN_HEADER)
        assert r1.status_code == 201
        r2 = await client.post("/api/v1/dashboards", json=body, headers=ORIGIN_HEADER)
        assert r2.status_code == 409

    async def test_get_update_delete(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        created = (
            await client.post("/api/v1/dashboards", json={"name": "Eins"}, headers=ORIGIN_HEADER)
        ).json()
        dash_id = created["id"]

        resp = await client.get(f"/api/v1/dashboards/{dash_id}", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        assert resp.json()["name"] == "Eins"

        new_layout = {
            "version": 1,
            "tabs": [
                {
                    "id": "tab-1",
                    "name": "Start",
                    "widgets": [{"app_id": "recent_contacts", "col": 0, "row": 0}],
                }
            ],
        }
        resp = await client.put(
            f"/api/v1/dashboards/{dash_id}",
            json={"name": "Eins Neu", "layout": new_layout},
            headers=ORIGIN_HEADER,
        )
        assert resp.status_code == 200, resp.text
        updated = resp.json()
        assert updated["name"] == "Eins Neu"
        assert updated["layout"]["tabs"][0]["widgets"][0]["app_id"] == "recent_contacts"
        assert updated["layout"]["tabs"][0]["widgets"][0]["col_span"] == 1

        # invalid layout -> 422
        bad_layout = {"version": 1, "tabs": [{"id": "t", "name": "T", "widgets": [{"app_id": "x", "col_span": 99}]}]}
        resp = await client.put(
            f"/api/v1/dashboards/{dash_id}",
            json={"layout": bad_layout},
            headers=ORIGIN_HEADER,
        )
        assert resp.status_code == 422

        # invalid uuid -> 400
        resp = await client.get("/api/v1/dashboards/not-a-uuid", headers=ORIGIN_HEADER)
        assert resp.status_code == 400

        # unknown uuid -> 404
        resp = await client.get(f"/api/v1/dashboards/{uuid.uuid4()}", headers=ORIGIN_HEADER)
        assert resp.status_code == 404

        resp = await client.delete(f"/api/v1/dashboards/{dash_id}", headers=ORIGIN_HEADER)
        assert resp.status_code == 204
        resp = await client.get(f"/api/v1/dashboards/{dash_id}", headers=ORIGIN_HEADER)
        assert resp.status_code == 404

    async def test_set_default_and_reassignment(self, client: AsyncClient, db_session):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        d1 = (await client.post("/api/v1/dashboards", json={"name": "Eins"}, headers=ORIGIN_HEADER)).json()
        d2 = (await client.post("/api/v1/dashboards", json={"name": "Zwei"}, headers=ORIGIN_HEADER)).json()
        assert d1["is_default"] is True
        assert d2["is_default"] is False

        resp = await client.post(f"/api/v1/dashboards/{d2['id']}/set-default", headers=ORIGIN_HEADER)
        assert resp.status_code == 200
        assert resp.json()["is_default"] is True

        items = {d["id"]: d for d in (await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)).json()}
        assert items[d1["id"]]["is_default"] is False
        assert items[d2["id"]]["is_default"] is True

        # deleting the default promotes the remaining dashboard
        resp = await client.delete(f"/api/v1/dashboards/{d2['id']}", headers=ORIGIN_HEADER)
        assert resp.status_code == 204
        items = (await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)).json()
        assert len(items) == 1
        assert items[0]["id"] == d1["id"]
        assert items[0]["is_default"] is True

    async def test_delete_last_reseeds_on_next_list(self, client: AsyncClient, db_session):
        """Empty list state is re-seeded on next GET (documented behaviour)."""
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        items = (await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)).json()
        assert len(items) == 1
        dash_id = items[0]["id"]

        await client.delete(f"/api/v1/dashboards/{dash_id}", headers=ORIGIN_HEADER)
        items = (await client.get("/api/v1/dashboards", headers=ORIGIN_HEADER)).json()
        assert len(items) == 1  # re-seeded
        assert items[0]["is_default"] is True

    async def test_create_audit_logged(self, client: AsyncClient, db_session: AsyncSession):
        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")

        resp = await client.post("/api/v1/dashboards", json={"name": "Audit"}, headers=ORIGIN_HEADER)
        assert resp.status_code == 201

        result = await db_session.execute(
            text("SELECT action, entity_type FROM audit_log WHERE entity_type = 'dashboard'")
        )
        rows = result.fetchall()
        assert any(r[0] == "create" for r in rows)


@pytest.mark.asyncio
class TestOwnershipAndIsolation:
    async def test_other_user_gets_404(self, client: AsyncClient, db_session):
        """Dashboards are personal (saved_views precedent): other users with
        dashboard:read see 404 on foreign dashboards, never their content."""
        import httpx
        from httpx import ASGITransport

        import app.main

        seed = await seed_tenant_and_users(db_session)
        await _make_user_with_dashboard_perms(db_session, seed, "second@tenanta.com", "dash_second")
        await login_client(client, "admin@tenanta.com")
        created = (
            await client.post("/api/v1/dashboards", json={"name": "Mein Board"}, headers=ORIGIN_HEADER)
        ).json()

        async with httpx.AsyncClient(
            transport=ASGITransport(app=app.main.app), base_url="http://test"
        ) as other:
            await login_client(other, "second@tenanta.com")
            resp = await other.get(f"/api/v1/dashboards/{created['id']}", headers=ORIGIN_HEADER)
            assert resp.status_code == 404
            # second user only sees their own (seeded) dashboard
            resp = await other.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
            assert resp.status_code == 200
            items = resp.json()
            assert all(d["id"] != created["id"] for d in items)

    async def test_editor_without_permission_gets_403(self, client: AsyncClient, db_session):
        """Editor role has no dashboard:read at all -> 403 on every endpoint."""
        import httpx
        from httpx import ASGITransport

        import app.main

        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")
        created = (
            await client.post("/api/v1/dashboards", json={"name": "Mein Board"}, headers=ORIGIN_HEADER)
        ).json()

        async with httpx.AsyncClient(
            transport=ASGITransport(app=app.main.app), base_url="http://test"
        ) as other:
            await login_client(other, "editor@tenanta.com")
            resp = await other.get(f"/api/v1/dashboards/{created['id']}", headers=ORIGIN_HEADER)
            assert resp.status_code == 403
            resp = await other.get("/api/v1/dashboards", headers=ORIGIN_HEADER)
            assert resp.status_code == 403

    async def test_cross_tenant_isolation(self, client: AsyncClient, db_session):
        """Tenant B admin never sees tenant A dashboards (RLS + owner filter)."""
        import httpx
        from httpx import ASGITransport

        import app.main

        await seed_tenant_and_users(db_session)
        await login_client(client, "admin@tenanta.com")
        created = (
            await client.post("/api/v1/dashboards", json={"name": "Tenant A Board"}, headers=ORIGIN_HEADER)
        ).json()

        async with httpx.AsyncClient(
            transport=ASGITransport(app=app.main.app), base_url="http://test"
        ) as other:
            await login_client(other, "admin@tenantb.com")
            resp = await other.get(f"/api/v1/dashboards/{created['id']}", headers=ORIGIN_HEADER)
            assert resp.status_code == 404
            items = (await other.get("/api/v1/dashboards", headers=ORIGIN_HEADER)).json()
            assert all(d["id"] != created["id"] for d in items)


# ═══════════════════════════════════════════════════════════════
# Migration 0144: RLS convergence (crm_api + crm_worker)
# ═══════════════════════════════════════════════════════════════


def _admin_db_available() -> bool:
    try:
        import asyncio

        from sqlalchemy.ext.asyncio import create_async_engine

        url = os.environ.get(
            "RLS_TEST_ADMIN_DB_URL",
            "postgresql+asyncpg://postgres@localhost:5432/leocrm_test",
        )
        eng = create_async_engine(url, echo=False)

        async def _check():
            async with eng.connect() as conn:
                await conn.execute(text("SELECT 1"))

        asyncio.run(_check())
        return True
    except Exception:
        return False


@pytest.mark.asyncio
@pytest.mark.skipif(not _admin_db_available(), reason="Admin DB not available")
class TestRlsConvergence:
    async def test_dashboards_policy_scoped_to_both_roles(self):
        from sqlalchemy.ext.asyncio import create_async_engine

        eng = create_async_engine(
            os.environ["RLS_TEST_ADMIN_DB_URL"], echo=False
        )
        async with eng.connect() as conn:
            result = await conn.execute(
                text(
                    "SELECT roles FROM pg_policies "
                    "WHERE tablename = 'dashboards' "
                    "AND policyname = 'dashboards_tenant_isolation'"
                )
            )
            row = result.fetchone()
            assert row is not None, "dashboards_tenant_isolation policy missing"
            roles = set(row[0])
            assert "crm_api" in roles
            assert "crm_worker" in roles
        await eng.dispose()

    async def test_phase_l_policies_converged_to_both_roles(self):
        """0143 created letterheads/print_templates/document_assets with only
        crm_api (measured on production 2026-08-30). Migration 0144 converges
        them to the 0090 pattern (crm_api + crm_worker)."""
        from sqlalchemy.ext.asyncio import create_async_engine

        eng = create_async_engine(
            os.environ["RLS_TEST_ADMIN_DB_URL"], echo=False
        )
        async with eng.connect() as conn:
            result = await conn.execute(
                text(
                    "SELECT tablename, roles FROM pg_policies "
                    "WHERE tablename IN ('letterheads','print_templates','document_assets') "
                    "AND policyname LIKE '%tenant_isolation%'"
                )
            )
            rows = result.fetchall()
            assert len(rows) == 3
            for tablename, roles in rows:
                assert "crm_api" in set(roles), f"{tablename}: crm_api missing"
                assert "crm_worker" in set(roles), f"{tablename}: crm_worker missing"
        await eng.dispose()