"""Тесты sklad_metrics (общие расчёты склада)."""

from __future__ import annotations

import os
import tempfile
import unittest
import uuid
from datetime import datetime

from app import create_app, db
from app.models import Component, ComponentStock, LoadingReport, LoadingReportComponent
from app.services.sklad_metrics import (
    consumed_by_component_id,
    effective_consumed_kg,
    list_stock_balance_items,
    month_consumption_by_component,
)
from config import TestingConfig


class SkladMetricsTestConfig(TestingConfig):
    _TMP_DIR = tempfile.mkdtemp(prefix="wesp-sklad-metrics-")
    SQLALCHEMY_DATABASE_URI = f"sqlite:///{os.path.join(_TMP_DIR, 'recipes_test.db')}"
    SQLALCHEMY_BINDS = {"reports": f"sqlite:///{os.path.join(_TMP_DIR, 'reports_test.db')}"}


class SkladMetricsTests(unittest.TestCase):
    def setUp(self) -> None:
        self.app = create_app(SkladMetricsTestConfig)
        self.ctx = self.app.app_context()
        self.ctx.push()
        db.create_all()
        self._seed()

    def tearDown(self) -> None:
        db.session.remove()
        db.drop_all()
        self.ctx.pop()

    def _seed(self) -> None:
        comp = Component(name="Сено", type="roughage")
        db.session.add(comp)
        db.session.flush()
        db.session.add(
            ComponentStock(
                component_id=comp.id,
                component_name=comp.name,
                total_kg=500.0,
                stocktake_at=datetime.now(),
                updated_at=datetime.now(),
            )
        )
        report = LoadingReport(
            id=str(uuid.uuid4()),
            recipe_id=str(uuid.uuid4()),
            recipe_name="R1",
            start_time=datetime.now(),
            dispenser_type="dispenser",
        )
        db.session.add(report)
        db.session.flush()
        db.session.add(
            LoadingReportComponent(
                report_id=report.id,
                component_id=comp.id,
                component_name=comp.name,
                target_weight=10.0,
                actual_weight=7.5,
                loading_order=1,
            )
        )
        db.session.commit()
        self.comp_id = comp.id

    def test_consumed_by_component_id(self) -> None:
        with self.app.app_context():
            data = consumed_by_component_id(
                db, LoadingReport, LoadingReportComponent
            )
        self.assertAlmostEqual(data.get(self.comp_id, 0), 7.5)

    def test_list_stock_balance_items(self) -> None:
        today = datetime.now().date()
        start = today.replace(day=1).isoformat()
        end = today.isoformat()
        with self.app.app_context():
            items = list_stock_balance_items(
                db,
                LoadingReport,
                LoadingReportComponent,
                None,
                None,
                date_from=start,
                date_to=end,
            )
        self.assertEqual(len(items), 1)
        self.assertEqual(items[0]["name"], "Сено")
        self.assertAlmostEqual(items[0]["consumed_total_kg"], 7.5)

    def test_effective_consumed_kg_zero_actual_uses_target(self) -> None:
        self.assertAlmostEqual(effective_consumed_kg(0, 0, 12.5), 12.5)
        self.assertAlmostEqual(effective_consumed_kg(0, -2, 12.5), 12.5)
        self.assertAlmostEqual(effective_consumed_kg(8, 1.5, 10), 9.5)
        self.assertAlmostEqual(effective_consumed_kg(8, -1, 10), 8.0)

    def test_consumed_zero_actual_with_target(self) -> None:
        report = LoadingReport(
            id=str(uuid.uuid4()),
            recipe_id=str(uuid.uuid4()),
            recipe_name="R2",
            start_time=datetime.now(),
            dispenser_type="dispenser",
        )
        db.session.add(report)
        db.session.flush()
        db.session.add(
            LoadingReportComponent(
                report_id=report.id,
                component_id=self.comp_id,
                component_name="Сено",
                target_weight=15.0,
                actual_weight=0.0,
                loading_order=1,
            )
        )
        db.session.commit()
        with self.app.app_context():
            data = consumed_by_component_id(db, LoadingReport, LoadingReportComponent)
        self.assertAlmostEqual(data.get(self.comp_id, 0), 22.5)

    def test_consumed_matches_by_name_when_id_differs(self) -> None:
        report = LoadingReport(
            id=str(uuid.uuid4()),
            recipe_id=str(uuid.uuid4()),
            recipe_name="R-name",
            start_time=datetime.now(),
            dispenser_type="dispenser",
        )
        db.session.add(report)
        db.session.flush()
        db.session.add(
            LoadingReportComponent(
                report_id=report.id,
                component_id="other-id-123",
                component_name="Сено",
                target_weight=10.0,
                actual_weight=4.0,
                loading_order=1,
            )
        )
        db.session.commit()
        today = datetime.now().date()
        start = today.replace(day=1).isoformat()
        end = today.isoformat()
        with self.app.app_context():
            items = list_stock_balance_items(
                db,
                LoadingReport,
                LoadingReportComponent,
                None,
                None,
                date_from=start,
                date_to=end,
            )
        stock_item = next(i for i in items if i.get("has_stock"))
        self.assertAlmostEqual(stock_item["consumed_total_kg"], 11.5)

    def test_month_consumption_without_stock_row(self) -> None:
        now = datetime.now()
        report = LoadingReport(
            id=str(uuid.uuid4()),
            recipe_id=str(uuid.uuid4()),
            recipe_name="R3",
            start_time=now,
            dispenser_type="dispenser",
        )
        db.session.add(report)
        db.session.flush()
        db.session.add(
            LoadingReportComponent(
                report_id=report.id,
                component_id=None,
                component_name="Силос",
                target_weight=20.0,
                actual_weight=0.0,
                loading_order=1,
            )
        )
        db.session.commit()
        with self.app.app_context():
            agg = month_consumption_by_component(
                db, LoadingReport, LoadingReportComponent, now.year, now.month
            )
        self.assertTrue(any("Силос" in (m.get("name") or "") for m in agg.values()))


if __name__ == "__main__":
    unittest.main()