"""Cross-module smoke test: seed skills → seed roles → seed resources →
gap report keys match recommendation keys → recommended IDs resolve through
/api/resources/<id>/.

Different from the unit tests: this exercises the full seed chain against
the real curated YAML files, not hand-crafted fixtures.
"""
from io import StringIO

import pytest
from django.core.management import call_command
from rest_framework.test import APIClient

from apps.resources.models import Resource
from apps.roles.models import Role, UserTargetRole
from apps.skills.models import Skill, UserSkill

pytestmark = pytest.mark.django_db


REGISTER = '/api/auth/register/'
USER_SKILLS = '/api/user-skills/'
TARGET_ROLE = '/api/target-role/'
ANALYSIS = '/api/analysis/'
RECOMMENDATIONS = '/api/recommendations/'
RESOURCES = '/api/resources/'


@pytest.fixture
def seeded(db):
    """Full curated seed — skills, roles, resources."""
    call_command('seed_initial_skills', stdout=StringIO())
    call_command('seed_initial_roles', stdout=StringIO())
    call_command('seed_initial_resources', stdout=StringIO())
    return True


def _auth_client():
    c = APIClient()
    r = c.post(REGISTER, data={
        'name': 'Cross', 'email': 'cross@x.com',
        'password': 'StrongPass123!', 'password_confirm': 'StrongPass123!',
    }, format='json')
    assert r.status_code == 201, r.data
    c.credentials(HTTP_AUTHORIZATION=f'Bearer {r.data["access"]}')
    return c


def test_gap_skills_match_recommendation_skills(seeded):
    """Every gap skill (MISSING/INSUFFICIENT) in the report appears as a key
    in the recommendations payload. MET skills must NOT appear."""
    c = _auth_client()
    role = Role.objects.get(role_name='Data Scientist')
    c.post(TARGET_ROLE, data={'role_id': role.id}, format='json')

    # Give the user partial skills so some gaps exist, some are MET.
    python_id = Skill.objects.get(skill_name='Python').id
    c.post(USER_SKILLS, data={'skill_id': python_id, 'proficiency': 100},
           format='json')

    gap_report = c.get(ANALYSIS).data
    rec_payload = c.get(RECOMMENDATIONS).data

    gap_skill_ids = {g['skill_id'] for g in gap_report['gaps']
                     if g['gap_type'] != 'MET'}
    met_skill_ids = {g['skill_id'] for g in gap_report['gaps']
                     if g['gap_type'] == 'MET'}
    rec_skill_ids = {int(k) for k in rec_payload['recommendations']}

    assert gap_skill_ids == rec_skill_ids
    assert rec_skill_ids.isdisjoint(met_skill_ids)


def test_recommended_resource_ids_match_resources_endpoint(seeded):
    c = _auth_client()
    role = Role.objects.get(role_name='Data Scientist')
    c.post(TARGET_ROLE, data={'role_id': role.id}, format='json')

    rec_payload = c.get(RECOMMENDATIONS).data
    for skill_id, items in rec_payload['recommendations'].items():
        for item in items:
            r = c.get(f'{RESOURCES}{item["resource_id"]}/')
            assert r.status_code == 200
            assert r.data['id'] == item['resource_id']
            assert r.data['url'] == item['url']


def test_mandatory_gap_gets_recommendations(seeded):
    """Python is mandatory for Data Scientist; with 0 proficiency, the
    recommendation payload MUST contain ≥1 Python-linked resource."""
    c = _auth_client()
    role = Role.objects.get(role_name='Data Scientist')
    c.post(TARGET_ROLE, data={'role_id': role.id}, format='json')

    python_id = Skill.objects.get(skill_name='Python').id
    rec_payload = c.get(RECOMMENDATIONS).data
    python_recs = rec_payload['recommendations'].get(str(python_id)) \
        or rec_payload['recommendations'].get(python_id)
    assert python_recs, 'Python gap should get ≥1 recommendation from curated catalog'


def test_severity_does_not_filter_recommendations(seeded):
    """Low / Medium / High severity all deserve recommendations —
    rank, don't silently drop."""
    c = _auth_client()
    role = Role.objects.get(role_name='Data Scientist')
    c.post(TARGET_ROLE, data={'role_id': role.id}, format='json')

    # Boost a skill just below threshold → LOW/MEDIUM severity, not 0.
    python_id = Skill.objects.get(skill_name='Python').id
    c.post(USER_SKILLS, data={'skill_id': python_id, 'proficiency': 55},
           format='json')

    report = c.get(ANALYSIS).data
    python_gap = next(g for g in report['gaps'] if g['skill_id'] == python_id)
    assert python_gap['gap_type'] == 'INSUFFICIENT'  # just below 60 threshold

    rec = c.get(RECOMMENDATIONS).data
    py_recs = rec['recommendations'].get(str(python_id)) \
        or rec['recommendations'].get(python_id)
    assert py_recs, 'low-severity insufficient gap should still surface recs'


def test_role_param_routes_to_different_role(seeded):
    """?role=<id> overrides the active target role."""
    c = _auth_client()
    ds = Role.objects.get(role_name='Data Scientist')
    fe = Role.objects.get(role_name='Frontend Developer')
    c.post(TARGET_ROLE, data={'role_id': ds.id}, format='json')

    r = c.get(f'{RECOMMENDATIONS}?role={fe.id}')
    assert r.status_code == 200
    assert r.data['role_id'] == fe.id
    assert r.data['role_name'] == 'Frontend Developer'