"""Tests for orders domain — order creation, status transitions, and pricing."""
import uuid

import pytest


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

async def _create_test_product(db):
    from app.domains.products.models import Product
    product = Product(
        id=uuid.uuid4(),
        name=f"Test Product {uuid.uuid4().hex[:6]}",
        category_key="TRB",
        components=[],
        cad_part_materials=[],
    )
    db.add(product)
    await db.commit()
    await db.refresh(product)
    return product


async def _create_test_order(db, user):
    from app.domains.orders.models import Order, OrderStatus
    order = Order(
        id=uuid.uuid4(),
        order_number=f"TEST-{uuid.uuid4().hex[:6].upper()}",
        status=OrderStatus.draft,
        created_by=user.id,
        tenant_id=None,
    )
    db.add(order)
    await db.commit()
    await db.refresh(order)
    return order


# ---------------------------------------------------------------------------
# Order creation
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_create_order_draft_status(db, admin_user):
    """New order starts in draft status."""
    order = await _create_test_order(db, admin_user)
    assert order.id is not None
    assert order.status.value == "draft"
    assert order.order_number.startswith("TEST-")


@pytest.mark.asyncio
async def test_order_has_no_lines_initially(db, admin_user):
    """New order starts with zero order lines."""
    from sqlalchemy import select
    from app.domains.orders.models import Order, OrderLine
    order = await _create_test_order(db, admin_user)
    result = await db.execute(
        select(OrderLine).where(OrderLine.order_id == order.id)
    )
    lines = result.scalars().all()
    assert len(lines) == 0


# ---------------------------------------------------------------------------
# Order line creation
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_add_order_line(db, admin_user):
    """Order line can be added to a draft order."""
    from app.domains.orders.models import OrderLine
    product = await _create_test_product(db)
    order = await _create_test_order(db, admin_user)

    line = OrderLine(
        id=uuid.uuid4(),
        order_id=order.id,
        product_id=product.id,
        render_status="pending",
        item_status="pending",
        tenant_id=None,
    )
    db.add(line)
    await db.commit()
    await db.refresh(line)

    assert line.id is not None
    assert line.order_id == order.id
    assert line.render_status == "pending"


# ---------------------------------------------------------------------------
# Status transitions
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_order_status_transition_to_submitted(db, admin_user):
    """Order status can be changed from draft to submitted."""
    from app.domains.orders.models import Order, OrderStatus
    order = await _create_test_order(db, admin_user)
    order.status = OrderStatus.submitted
    await db.commit()
    await db.refresh(order)
    assert order.status == OrderStatus.submitted


@pytest.mark.asyncio
async def test_order_multiple_lines(db, admin_user):
    """Multiple lines can be added to the same order."""
    from app.domains.orders.models import OrderLine
    product = await _create_test_product(db)
    order = await _create_test_order(db, admin_user)

    for _ in range(3):
        line = OrderLine(
            id=uuid.uuid4(),
            order_id=order.id,
            product_id=product.id,
            render_status="pending",
            item_status="pending",
            tenant_id=None,
        )
        db.add(line)
    await db.commit()

    from sqlalchemy import select
    result = await db.execute(
        select(OrderLine).where(OrderLine.order_id == order.id)
    )
    assert len(result.scalars().all()) == 3


# ---------------------------------------------------------------------------
# Render status tracking
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_order_line_render_status_update(db, admin_user):
    """Order line render_status can be updated to processing/completed."""
    from app.domains.orders.models import OrderLine
    product = await _create_test_product(db)
    order = await _create_test_order(db, admin_user)

    line = OrderLine(
        id=uuid.uuid4(),
        order_id=order.id,
        product_id=product.id,
        render_status="pending",
        item_status="pending",
        tenant_id=None,
    )
    db.add(line)
    await db.commit()

    line.render_status = "processing"
    await db.commit()
    await db.refresh(line)
    assert line.render_status == "processing"

    line.render_status = "completed"
    await db.commit()
    await db.refresh(line)
    assert line.render_status == "completed"


# ---------------------------------------------------------------------------
# Unit price
# ---------------------------------------------------------------------------

@pytest.mark.asyncio
async def test_order_line_unit_price_nullable(db, admin_user):
    """unit_price defaults to None."""
    from app.domains.orders.models import OrderLine
    product = await _create_test_product(db)
    order = await _create_test_order(db, admin_user)

    line = OrderLine(
        id=uuid.uuid4(),
        order_id=order.id,
        product_id=product.id,
        render_status="pending",
        item_status="pending",
        tenant_id=None,
    )
    db.add(line)
    await db.commit()
    await db.refresh(line)
    assert line.unit_price is None