"""
End-to-end tests: create a timetable, add capacity, create a form definition
with a reservation element, then submit a booking through that form.

Fixture chain (all module-scoped so resources are created once):
    timetable_id -> capacity_id
    timetable_id -> form_id
    form_id + timetable_id + capacity_id -> submission tests

Run:
    pytest Reservations/test_timetable_reservation.py -v
"""

import os
from datetime import date, timedelta
import requests
import pytest

BASE_URL = os.environ.get("WP_BASE_URL", "http://localhost/wordpress")
API = f"{BASE_URL}/wp-json/reservations/v1"

BOOKING_DATE = (date.today() + timedelta(days=7)).isoformat()


def slot_dt(time: str = "08:00:00") -> str:
    """Return an ISO 8601 UTC datetime string for the booking date at the given time."""
    return f"{BOOKING_DATE}T{time}+00:00"


# ---------------------------------------------------------------------------
# Fixtures
# ---------------------------------------------------------------------------

@pytest.fixture(scope="module")
def timetable_id():
    r = requests.post(f"{API}/timetable", json={
        "name": "Test timetable",
        "block_size": 60,
    })
    assert r.status_code == 201, f"Failed to create timetable: {r.text}"
    tid = r.json()["id"]
    assert isinstance(tid, int) and tid > 0
    return tid


@pytest.fixture(scope="module")
def capacity_id(timetable_id):
    r = requests.post(f"{API}/timetable/{timetable_id}/capacity", json={
        "capacity": 2,
        "min_lead_time_minutes": 0,
        "date": BOOKING_DATE,
        "start_time": "08:00",
        "end_time": "18:00",
        "repeat_period_in_days": 0,
        "repeat_times": 0,
    })
    assert r.status_code == 201, f"Failed to add capacity: {r.text}"
    cid = r.json()["ids"][0]
    assert isinstance(cid, int) and cid > 0
    return cid


@pytest.fixture(scope="module")
def form_id(timetable_id):
    r = requests.post(f"{API}/form-definition", json={
        "name": "Reservation form",
        "definition": {
            "email_key": "email",
            "elements": [
                {
                    "type": "reservation",
                    "name": "reservation",
                    "label": "Book a slot",
                    "calendar_id": str(timetable_id),
                    "required": True,
                },
                {
                    "type": "input-text",
                    "name": "email",
                    "label": "Email",
                    "required": True,
                    "validation": "email",
                },
                {
                    "type": "button",
                    "name": "submit",
                    "label": "Submit",
                },
            ]
        },
    })
    assert r.status_code == 201, f"Failed to create form definition: {r.text}"
    fid = r.json()["id"]
    assert isinstance(fid, int) and fid > 0
    return fid


def submit(form_id, payload):
    return requests.post(f"{API}/form/{form_id}", json=payload)


def valid_payload(timetable_id, time: str = "08:00:00"):
    return {
        "email": "user@example.com",
        "reservation": {
            "timetable_id": timetable_id,
            "timetable_reservations": [slot_dt(time)],
        },
    }


# ---------------------------------------------------------------------------
# Setup verification
# ---------------------------------------------------------------------------

class TestSetup:
    def test_timetable_created(self, timetable_id):
        r = requests.get(f"{API}/timetable")
        assert r.status_code == 200
        ids = [row["id"] for row in r.json()["data"]]
        assert timetable_id in ids or str(timetable_id) in [str(i) for i in ids]

    def test_capacity_listed(self, timetable_id, capacity_id):
        r = requests.get(f"{API}/timetable/{timetable_id}/capacity")
        assert r.status_code == 200
        ids = [row["id"] for row in r.json()["data"]]
        assert capacity_id in ids or str(capacity_id) in [str(i) for i in ids]

    def test_form_definition_listed(self, form_id):
        r = requests.get(f"{API}/form-definition")
        assert r.status_code == 200
        ids = [row["form_id"] for row in r.json()["data"]]
        assert form_id in ids or str(form_id) in [str(i) for i in ids]


# ---------------------------------------------------------------------------
# Reservation element validation
# ---------------------------------------------------------------------------

class TestReservationValidation:
    def test_missing_reservation_field_returns_error(self, form_id):
        r = submit(form_id, {"email": "user@example.com"})
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "reservation"), None)
        assert error is not None
        assert error["code"] == "required"

    def test_reservation_missing_timetable_id(self, form_id):
        r = submit(form_id, {
            "email": "user@example.com",
            "reservation": {"timetable_reservations": [slot_dt()]},
        })
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "reservation"), None)
        assert error is not None
        assert error["code"] == "invalid"

    def test_reservation_missing_timetable_reservations(self, form_id, timetable_id):
        r = submit(form_id, {
            "email": "user@example.com",
            "reservation": {"timetable_id": timetable_id},
        })
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "reservation"), None)
        assert error is not None
        assert error["code"] == "missing_field"

    def test_reservation_payload_must_be_object(self, form_id):
        r = submit(form_id, {
            "email": "user@example.com",
            "reservation": "not-an-object",
        })
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "reservation"), None)
        assert error is not None

    def test_slot_outside_capacity_fails(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, valid_payload(timetable_id, "20:00:00"))
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "reservation"), None)
        assert error is not None
        assert error["code"] == "not_available"

    def test_missing_email_with_valid_reservation(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, {
            "reservation": {
                "timetable_id": timetable_id,
                "timetable_reservations": [slot_dt()],
            },
        })
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "email"), None)
        assert error is not None
        assert error["code"] == "required"

    def test_invalid_email_with_valid_reservation(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, {
            "email": "not-an-email",
            "reservation": {
                "timetable_id": timetable_id,
                "timetable_reservations": [slot_dt()],
            },
        })
        body = r.json()
        assert body["success"] is False
        error = next((e for e in body["errors"] if e["element"] == "email"), None)
        assert error is not None
        assert error["code"] == "invalid_email"


# ---------------------------------------------------------------------------
# Booking fixture + tests
# ---------------------------------------------------------------------------

@pytest.fixture(scope="module")
def booking(form_id, timetable_id, capacity_id):
    assert capacity_id > 0
    r = requests.post(f"{API}/form/{form_id}", json=valid_payload(timetable_id))
    assert r.status_code == 200, f"Booking failed: {r.text}"
    return r.json()


class TestBooking:
    def test_booking_succeeds(self, booking):
        assert booking["success"] is True

    def test_booking_has_submit_id(self, booking):
        assert "submit_id" in booking
        assert isinstance(booking["submit_id"], int)
        assert booking["submit_id"] > 0

    def test_booking_values_contain_email(self, booking):
        assert booking["values"]["email"] == "user@example.com"

    def test_second_booking_gets_different_submit_id(self, form_id, timetable_id, capacity_id, booking):
        assert capacity_id > 0
        r = requests.post(f"{API}/form/{form_id}", json=valid_payload(timetable_id))
        assert r.status_code == 200
        assert r.json()["submit_id"] != booking["submit_id"]


# ---------------------------------------------------------------------------
# Full submission
# ---------------------------------------------------------------------------

class TestReservationSubmission:
    def test_valid_submission_returns_200(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, valid_payload(timetable_id, "13:00:00"))
        assert r.status_code == 200

    def test_valid_submission_succeeds(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, valid_payload(timetable_id, "14:00:00"))
        assert r.json()["success"] is True

    def test_valid_submission_returns_submit_id(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        r = submit(form_id, valid_payload(timetable_id, "15:00:00"))
        body = r.json()
        assert "submit_id" in body
        assert isinstance(body["submit_id"], int)
        assert body["submit_id"] > 0


class TestReservationOverlapSubmission:
    def test_overlapping_submission_fails(self, form_id, timetable_id, capacity_id):
        assert capacity_id > 0
        # capacity=2, so first two succeed and third is rejected
        r = submit(form_id, valid_payload(timetable_id, "10:00:00"))
        assert r.status_code == 200
        assert r.json()["success"] is True
        r = submit(form_id, valid_payload(timetable_id, "10:00:00"))
        assert r.status_code == 200
        assert r.json()["success"] is True
        r = submit(form_id, valid_payload(timetable_id, "10:00:00"))
        assert r.json()["success"] is False
        error = next((e for e in r.json()["errors"] if e["element"] == "reservation"), None)
        assert error is not None
        assert error["code"] == "not_available"