"""Tests for statistics blueprint (client/blueprints/statistics.py).

Covers dashboard rendering, role enforcement, and SPC/summary API proxies.
"""
import pytest


class TestDashboard:
    """GET /statistics/dashboard tests."""

    def test_dashboard_renders(self, logged_in_client, mock_api_client):
        """Dashboard renders for Metrologist role."""
        mock_api_client.get.return_value = {
            "items": [
                {"id": 1, "code": "REC-001", "name": "Recipe A"},
            ],
            "total": 1,
            "pages": 1,
        }

        resp = logged_in_client.get("/statistics/dashboard")
        assert resp.status_code == 200

    def test_dashboard_requires_login(self, client):
        """Unauthenticated user is redirected to login."""
        resp = client.get("/statistics/dashboard", follow_redirects=False)
        assert resp.status_code == 302
        assert "/auth/login" in resp.headers["Location"]

    def test_dashboard_pages_past_the_first_hundred_recipes(
        self, logged_in_client, mock_api_client,
    ):
        """#37.6: a single per_page=100 call used to drop every recipe past #100."""
        page1 = {
            "items": [{"id": i, "code": f"REC-{i:03d}"} for i in range(100)],
            "total": 101,
            "pages": 2,
        }
        page2 = {
            "items": [{"id": 100, "code": "REC-100"}],
            "total": 101,
            "pages": 2,
        }
        mock_api_client.get.side_effect = [page1, page2]

        resp = logged_in_client.get("/statistics/dashboard")
        assert resp.status_code == 200
        assert mock_api_client.get.call_count == 2
        assert "REC-100" in resp.get_data(as_text=True)

        first_call = mock_api_client.get.call_args_list[0]
        second_call = mock_api_client.get.call_args_list[1]
        assert first_call.kwargs["params"]["page"] == 1
        assert second_call.kwargs["params"]["page"] == 2


class TestRoleRequired:
    """Metrologist role enforcement tests."""

    def test_requires_metrologist_role(self, flask_app):
        """User without Metrologist role gets 403 on statistics endpoints."""
        with flask_app.test_client() as c:
            with c.session_transaction() as sess:
                sess["api_key"] = "test-key"
                sess["user"] = {
                    "id": 3,
                    "username": "maker_only",
                    "display_name": "Maker Only",
                    "roles": ["Maker"],
                    "is_admin": False,
                    "language_pref": "en",
                    "theme_pref": "light",
                    "active": True,
                }
                sess["user_id"] = 3
                sess["language"] = "en"
                sess["theme"] = "light"

            resp = c.get("/statistics/dashboard")
            assert resp.status_code == 403


class TestSPCProxy:
    """SPC data proxy endpoint tests."""

    def test_summary_proxy(self, logged_in_client, mock_api_client):
        """Summary API proxy returns JSON from backend."""
        mock_api_client.get.return_value = {
            "total": 100,
            "pass_count": 90,
            "fail_count": 5,
            "warning_count": 5,
        }

        resp = logged_in_client.get(
            "/statistics/api/summary?recipe_id=1"
        )
        assert resp.status_code == 200
        data = resp.get_json()
        assert data["total"] == 100

    def test_capability_proxy(self, logged_in_client, mock_api_client):
        """Capability API proxy returns JSON from backend."""
        mock_api_client.get.return_value = {
            "cp": 1.33,
            "cpk": 1.20,
        }

        resp = logged_in_client.get(
            "/statistics/api/capability?recipe_id=1&subtask_id=1"
        )
        assert resp.status_code == 200
        data = resp.get_json()
        assert "cp" in data


class TestRunsProxy:
    """#58: filtro per sessione di produzione."""

    def test_runs_proxy(self, logged_in_client, mock_api_client):
        mock_api_client.get.return_value = [{"id": 5, "measurement_count": 3}]
        resp = logged_in_client.get("/statistics/api/runs?recipe_id=7")
        assert resp.status_code == 200
        assert resp.get_json()[0]["id"] == 5
        args, kwargs = mock_api_client.get.call_args
        assert args[0] == "/api/statistics/runs"
        assert kwargs["params"] == {"recipe_id": "7"}

    def test_summary_forwards_production_run_id(self, logged_in_client, mock_api_client):
        mock_api_client.get.return_value = {"total": 1}
        logged_in_client.get("/statistics/api/summary?recipe_id=1&production_run_id=5")
        assert mock_api_client.get.call_args.kwargs["params"]["production_run_id"] == "5"


class TestRunTaskResultsProxy:
    """#58: esiti dei task e allegati della sessione."""

    def test_task_results_proxy(self, logged_in_client, mock_api_client):
        payload = {"run_id": 5, "counts": {"ok": 1, "nok": 0, "done": 0}, "results": []}
        mock_api_client.get.return_value = payload
        resp = logged_in_client.get("/statistics/api/runs/5/task-results")
        assert resp.status_code == 200
        assert resp.get_json() == payload
        assert mock_api_client.get.call_args.args[0] == "/api/statistics/runs/5/task-results"

    def test_task_results_proxy_relays_error(self, logged_in_client, mock_api_client):
        mock_api_client.get.return_value = {"error": True, "detail": "x", "status_code": 404}
        resp = logged_in_client.get("/statistics/api/runs/9/task-results")
        assert resp.status_code == 404
        assert resp.get_json()["error"] is True

    def test_file_proxy_serves_task_results_only(self, logged_in_client):
        from unittest.mock import patch
        from flask import Response
        with patch("blueprints.statistics.proxy_file",
                   return_value=Response("img", status=200)) as pf:
            ok = logged_in_client.get("/statistics/api/files/task_results/a.jpg")
            assert ok.status_code == 200
            pf.assert_called_once_with("task_results/a.jpg")
            for bad in ("statistics/x", "task_results/../statistics/x", "../etc/passwd"):
                assert logged_in_client.get(f"/statistics/api/files/{bad}").status_code == 404
            assert pf.call_count == 1  # i percorsi rifiutati non arrivano al proxy

    def test_dashboard_has_task_results_panel(self, logged_in_client, mock_api_client):
        mock_api_client.get.return_value = {"items": [], "total": 0, "pages": 1}
        html = logged_in_client.get("/statistics/dashboard").get_data(as_text=True)
        assert 'id="run-task-results"' in html
        assert "loadTaskResults" in html
        assert "/statistics/api/runs/" in html