import copy

from flask import current_app

from app.dependencies import db
from app.project_supervisor.models import YearGroupProjectSupervisors
from app.students.models import Group

from ...fake_data import (
    create_group,
    create_groups,
    create_project_supervisors,
    create_students,
    create_year_group,
)
from ...utils import (
    _test_case_client,
    _test_case_client_without_response,
    _test_case_group,
    assert_model_changes,
)

valid_data = {"name": "System Pri"}

new_data = {"name": "Mobile app"}

invalid_data = {
    "name": "Mobile app v2",
    "students": [123_344, 455_444],
    "project_supervisor_id": 1,
}


def test_list_groups(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        create_groups(yg, 33)
        data = _test_case_client_without_response(
            client,
            f"/api/coordinator/groups/{yg.id}/?per_page=10",
            None,
            200,
            method="get",
        )
        assert data.get("max_pages") == 4
        assert len(data.get("groups")) == 10


def test_detail_group(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        group = create_group(valid_data, yg)
        data = _test_case_client_without_response(
            client,
            f"/api/coordinator/groups/{group.id}/detail/",
            None,
            200,
            method="get",
        )
        assert_model_changes(group, data)


def test_detail_group_if_group_doesnt_exist(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        _test_case_client(
            client,
            "/api/coordinator/groups/11/detail/",
            None,
            "Not found group!",
            404,
            method="get",
            key="error",
        )


def test_delete_group(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        group = create_group(valid_data, yg)
        _test_case_client(
            client,
            f"/api/coordinator/groups/{group.id}/",
            None,
            "Group was deleted!",
            202,
            method="delete",
        )


def test_delete_group_if_group_doesnt_exist(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        _test_case_client(
            client,
            "/api/coordinator/groups/32/",
            None,
            "Not found group!",
            404,
            method="delete",
            key="error",
        )


def test_edit_group(test_app_with_context) -> None:
    data = copy.copy(new_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        students = create_students(yg, 3)
        ps = create_project_supervisors(yg, 1)[0]
        group = create_group(valid_data, yg)
        data["students"] = [student.index for student in students]
        data["project_supervisor_id"] = ps.id

        _test_case_client(
            client,
            f"/api/coordinator/groups/{group.id}/",
            data,
            "Group was updated!",
            200,
            method="put",
        )
        _test_case_group(group, data)


def test_edit_group_with_invalid_project_supervisor_id(test_app_with_context) -> None:
    data = copy.copy(new_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        students = create_students(yg, 3)
        group = create_group(valid_data, yg)
        data["students"] = [student.index for student in students]
        data["project_supervisor_id"] = 10
        _test_case_client(
            client,
            f"/api/coordinator/groups/{group.id}/",
            data,
            "Not found project supervisor!",
            404,
            method="put",
            key="error",
        )


def test_edit_group_with_invalid_data(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        group = create_group(valid_data, yg)
        data = {"students": [123_4356, 243_533, 434_343]}
        _test_case_client(
            client,
            f"/api/coordinator/groups/{group.id}/",
            data,
            "Validation error",
            400,
            method="put",
        )


def test_edit_group_with_invalid_student_indexes(test_app_with_context) -> None:
    data = copy.deepcopy(new_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        group = create_group(valid_data, yg)
        data["students"] = [123_456, 243_533, 434_343]
        _test_case_client(
            client,
            f"/api/coordinator/groups/{group.id}/",
            data,
            "Not found students!",
            404,
            method="put",
            key="error",
        )


def test_edit_group_if_group_doesnt_exist(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        _test_case_client(
            client,
            "/api/coordinator/groups/333/",
            new_data,
            "Not found group!",
            404,
            method="put",
            key="error",
        )


def test_edit_group_if_you_pass_empty_data(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        _test_case_client(
            client,
            "/api/coordinator/groups/333/",
            {},
            "You have passed empty data!",
            400,
            method="put",
            key="error",
        )


def test_create_group(test_app_with_context) -> None:
    data = copy.deepcopy(new_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        students = create_students(yg, 3)
        ps = create_project_supervisors(yg, 1)[0]
        data["students"] = [student.index for student in students]
        data["project_supervisor_id"] = ps.id

        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            data,
            "Group was created!",
            201,
            method="post",
        )
        assert Group.query.count() == 1
        _test_case_group(Group.query.first(), data)


def test_create_group_if_year_group_doesnt_exist(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        _test_case_client(
            client,
            "/api/coordinator/groups/22/",
            invalid_data,
            "Not found year group!",
            404,
            method="post",
            key="error",
        )


def test_create_group_if_project_supervisor_doesnt_exist(test_app_with_context) -> None:
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            invalid_data,
            "Not found project supervisor!",
            404,
            method="post",
            key="error",
        )


def test_create_group_if_you_exceed_the_group_limit(test_app_with_context) -> None:
    data = copy.deepcopy(invalid_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        ps = create_project_supervisors(yg, 1)[0]
        data["project_supervisor_id"] = ps.id
        limit_group = current_app.config.get("LIMIT_STUDENTS_PER_GROUP")

        data["students"].extend([999_000 + i for i in range(limit_group + 4)])

        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            data,
            f"Too much students you want add to group, The group can have only {limit_group}"
            " students",
            400,
            method="post",
            key="error",
        )


def test_create_group_if_students_doesnt_exist(test_app_with_context) -> None:
    data = copy.deepcopy(invalid_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        ps = create_project_supervisors(yg, 1)[0]
        data["project_supervisor_id"] = ps.id
        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            data,
            "Not found students!",
            404,
            method="post",
            key="error",
        )


def test_create_group_if_at_least_one_student_belong_to_other_group(
    test_app_with_context,
) -> None:
    data = copy.deepcopy(invalid_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        ps = create_project_supervisors(yg, 1)[0]
        group = create_group(valid_data, yg)
        data["project_supervisor_id"] = ps.id
        student = create_students(yg, 1)[0]
        group.students.append(student)
        db.session.commit()

        data["students"].extend([student.index])
        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            data,
            "One or more students have already belonged to group!",
            400,
            method="post",
            key="error",
        )


def test_create_group_if_limit_of_group_was_exceed_for_project_supervisor(
    test_app_with_context,
) -> None:
    data = copy.deepcopy(invalid_data)
    with test_app_with_context.test_client() as client:
        yg = create_year_group()
        ps = create_project_supervisors(yg, 1)[0]
        data["project_supervisor_id"] = ps.id

        ygps = YearGroupProjectSupervisors.query.filter_by(
            project_supervisor_id=ps.id, year_group_id=yg.id
        ).first()
        limit_group = ygps.limit_group

        groups = create_groups(yg, limit_group)
        for group in groups:
            group.project_supervisor_id = ps.id
        db.session.commit()

        _test_case_client(
            client,
            f"/api/coordinator/groups/{yg.id}/",
            data,
            "Can't create new group, project supervisor achieved a limit of groups",
            400,
            method="post",
            key="error",
        )