"""
API endpoint tests for Scenar Creator v4.
"""

import pytest
from fastapi.testclient import TestClient

from app.main import app


@pytest.fixture
def client():
    return TestClient(app)


def make_valid_doc(multiday=False):
    blocks = [{
        "id": "b1",
        "date": "2026-03-01",
        "start": "09:00",
        "end": "10:00",
        "title": "Opening",
        "type_id": "ws"
    }]
    if multiday:
        blocks.append({
            "id": "b2",
            "date": "2026-03-02",
            "start": "10:00",
            "end": "11:30",
            "title": "Day 2 Session",
            "type_id": "ws"
        })
    return {
        "version": "1.0",
        "event": {
            "title": "Test Event",
            "date_from": "2026-03-01",
            "date_to": "2026-03-02" if multiday else "2026-03-01"
        },
        "program_types": [{"id": "ws", "name": "Workshop", "color": "#FF0000"}],
        "blocks": blocks
    }


def test_health(client):
    r = client.get("/api/health")
    assert r.status_code == 200
    data = r.json()
    assert data["status"] == "ok"
    assert data["version"] == "4.2.0"


def test_root_returns_html(client):
    r = client.get("/")
    assert r.status_code == 200
    assert "text/html" in r.headers["content-type"]
    assert "Scen" in r.text and "Creator" in r.text


def test_validate_valid(client):
    doc = make_valid_doc()
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    data = r.json()
    assert data["valid"] is True
    assert data["errors"] == []


def test_validate_unknown_type(client):
    doc = make_valid_doc()
    doc["blocks"][0]["type_id"] = "UNKNOWN"
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    data = r.json()
    assert data["valid"] is False
    assert any("UNKNOWN" in e for e in data["errors"])


def test_validate_no_blocks(client):
    doc = make_valid_doc()
    doc["blocks"] = []
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    data = r.json()
    assert data["valid"] is False


def test_validate_no_types(client):
    doc = make_valid_doc()
    doc["program_types"] = []
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    data = r.json()
    assert data["valid"] is False


def test_sample_endpoint(client):
    r = client.get("/api/sample")
    assert r.status_code == 200
    data = r.json()
    assert data["version"] == "1.0"
    assert data["event"]["title"] == "Zimní výjezd oddílu"
    assert len(data["program_types"]) >= 3
    # multi-day sample
    assert data["event"]["date_from"] == "2026-03-01"
    assert data["event"]["date_to"] == "2026-03-02"
    # blocks for both days
    dates = {b["date"] for b in data["blocks"]}
    assert "2026-03-01" in dates
    assert "2026-03-02" in dates


def test_generate_pdf(client):
    doc = make_valid_doc()
    r = client.post("/api/generate-pdf", json=doc)
    assert r.status_code == 200
    assert r.headers["content-type"] == "application/pdf"
    assert r.content[:5] == b'%PDF-'


def test_generate_pdf_multiday(client):
    doc = make_valid_doc(multiday=True)
    r = client.post("/api/generate-pdf", json=doc)
    assert r.status_code == 200
    assert r.content[:5] == b'%PDF-'


def test_generate_pdf_overnight_block(client):
    """Block that crosses midnight: end < start."""
    doc = make_valid_doc()
    doc["blocks"][0]["start"] = "23:00"
    doc["blocks"][0]["end"] = "01:30"   # overnight
    r = client.post("/api/generate-pdf", json=doc)
    assert r.status_code == 200
    assert r.content[:5] == b'%PDF-'


def test_generate_pdf_no_blocks(client):
    doc = make_valid_doc()
    doc["blocks"] = []
    r = client.post("/api/generate-pdf", json=doc)
    assert r.status_code == 422


def test_swagger_docs(client):
    r = client.get("/docs")
    assert r.status_code == 200


def test_series_id_accepted(client):
    """Blocks with series_id should be accepted by the validate endpoint."""
    doc = {
        "version": "1.0",
        "event": {"title": "Series Test", "date_from": "2026-03-01", "date_to": "2026-03-02"},
        "program_types": [{"id": "ws", "name": "Workshop", "color": "#FF0000"}],
        "blocks": [
            {"id": "b1", "date": "2026-03-01", "start": "09:00", "end": "10:00",
             "title": "Morning", "type_id": "ws", "series_id": "s_001"},
            {"id": "b2", "date": "2026-03-02", "start": "09:00", "end": "10:00",
             "title": "Morning", "type_id": "ws", "series_id": "s_001"},
        ]
    }
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    assert r.json()["valid"] is True


def test_backward_compat_date_field(client):
    """Old JSON with 'date' (not date_from/date_to) should still validate."""
    doc = {
        "version": "1.0",
        "event": {"title": "Old Format", "date": "2026-03-01"},
        "program_types": [{"id": "t1", "name": "Type", "color": "#0000FF"}],
        "blocks": [{
            "id": "bx",
            "date": "2026-03-01",
            "start": "10:00",
            "end": "11:00",
            "title": "Session",
            "type_id": "t1"
        }]
    }
    r = client.post("/api/validate", json=doc)
    assert r.status_code == 200
    assert r.json()["valid"] is True