import datetime
import re

import pytest

from conftest import outcome_actions

TODAY = datetime.date.today().isoformat()


@pytest.fixture
def instructor(dev_client):
    dev_client.post("/dev/launch/dev-instructor")
    # Speed: shrink the simulation for tests.
    dev_client.post(
        "/instructor/settings",
        data={"selection_mode": "weighted", "weight_factor": "2",
              "show_assessments": "on", "n_sims": "200", "sim_seed": "1"},
    )
    return dev_client


def record_calls(client, n=6):
    for _ in range(n):
        client.post("/instructor/live/next", data={"date": TODAY})
        page = client.get(f"/instructor/live?date={TODAY}").get_data(as_text=True)
        call_id = re.search(r"/instructor/call/(\d+)/outcome", page).group(1)
        client.post(
            f"/instructor/call/{call_id}/outcome",
            data={"action": outcome_actions(page)["GOOD"]},
        )


def test_grades_page_before_compute(instructor):
    page = instructor.get("/instructor/grades/").get_data(as_text=True)
    assert "No grades computed yet" in page


def test_compute_and_view_grades(instructor):
    record_calls(instructor)
    resp = instructor.post(
        "/instructor/grades/compute", follow_redirects=True
    )
    page = resp.get_data(as_text=True)
    assert "SD of full-attendance counts" in page
    assert "4.00" in page          # someone answered GOOD -> full marks
    assert "never answered" in page  # not everyone got called

    resp = instructor.get("/instructor/grades/export.csv")
    assert resp.mimetype == "text/csv"
    assert "final_points" in resp.get_data(as_text=True)


def test_student_report_and_publishing(instructor):
    record_calls(instructor)
    instructor.post("/instructor/grades/compute")
    page = instructor.get("/instructor/grades/").get_data(as_text=True)
    student_id = re.search(r"/instructor/grades/student/(\d+)", page).group(1)
    report = instructor.get(
        f"/instructor/grades/student/{student_id}"
    ).get_data(as_text=True)
    assert "How your grade was computed" in report

    # Unpublished: students see no report link and get 404.
    instructor.post("/dev/launch/dev-student-1")
    assert "participation grade report" not in instructor.get("/me").get_data(as_text=True)
    assert instructor.get("/me/report").status_code == 404

    # Publish, and the student can read their own report.
    instructor.post("/dev/launch/dev-instructor")
    instructor.post(
        "/instructor/settings",
        data={"selection_mode": "weighted", "weight_factor": "2",
              "publish_grade_reports": "on"},
    )
    instructor.post("/dev/launch/dev-student-1")
    page = instructor.get("/me").get_data(as_text=True)
    assert "participation grade report" in page
    report = instructor.get("/me/report").get_data(as_text=True)
    assert "How your grade was computed" in report
    assert "Ada Lovelace" in report


def test_push_flow_dev_mode(instructor):
    record_calls(instructor)
    instructor.post("/instructor/grades/compute")

    # Push pages don't exist until AGS is enabled.
    assert instructor.get("/instructor/grades/push").status_code == 404

    instructor.post(
        "/instructor/settings",
        data={"selection_mode": "weighted", "weight_factor": "2",
              "ags_enabled": "on"},
    )
    page = instructor.get("/instructor/grades/push").get_data(as_text=True)
    assert "Review before pushing" in page
    assert "Push 8 grades to Canvas" in page

    resp = instructor.post("/instructor/grades/push")
    page = resp.get_data(as_text=True)
    assert "simulated (dev mode)" in page
    assert "8 of\n  8 pushed successfully" in page or "8 of" in page


def test_grades_require_instructor(dev_client):
    dev_client.post("/dev/launch/dev-instructor")
    dev_client.post("/dev/launch/dev-student-1")
    assert dev_client.get("/instructor/grades/").status_code == 403


def test_scale_settings_and_canvas_import(instructor):
    # Threshold rows via the settings form.
    instructor.post(
        "/instructor/settings",
        data={"selection_mode": "weighted", "weight_factor": "2",
              "scale_type": "table",
              "scale_rows": "93 A\n90 A-\n0 F"},
    )
    record_calls(instructor, n=3)
    instructor.post("/instructor/grades/compute")
    page = instructor.get("/instructor/grades/").get_data(as_text=True)
    assert "<strong>A</strong>" in page