"""Lab commands: diff, apply_from_master, recalculate."""

from __future__ import annotations

import json
import unittest

from app import create_app, db
from app.lab.calc.diff import compare_master_execution
from app.lab.commands import apply_from_master, recalculate_ration, seed_from_execution
from app.lab.models import LabRationLine, LabRecipeRation
from app.lab.services.component_nutrients import upsert_from_api_dict
from app.models import Component, Ingredient, Recipe
from app.models.base import default_uuid
from app.services.setup_state import mark_setup_complete
from tests.helpers.zootech_test_helpers import ZootechTestConfig


class LabCommandsTests(unittest.TestCase):
    def setUp(self) -> None:
        self.app = create_app(ZootechTestConfig)
        self.client = self.app.test_client()
        self.ctx = self.app.app_context()
        self.ctx.push()
        db.create_all()
        mark_setup_complete(self.app)

        self.comp = Component(
            id=default_uuid(),
            name="Сено",
            type="Объемные корма",
            dry_matter=85.0,
            protein=10.0,
            energy=8.0,
            price=5.0,
        )
        db.session.add(self.comp)
        db.session.flush()
        upsert_from_api_dict(self.comp.id, {"Сыр. Протеин": 100, "СВ": 850})
        self.recipe = Recipe(
            id=default_uuid(),
            name="Lab cmd test",
            heads_per_trip=10,
            mixing_time=5,
            ration_type="BEEF",
        )
        self.ingredient = Ingredient(
            id=default_uuid(),
            recipe_id=self.recipe.id,
            component_id=self.comp.id,
            name="Сено",
            amount=5.0,
            weight_per_head=5.0,
            dry_matter=85.0,
            order=0,
        )
        db.session.add_all([self.recipe, self.ingredient])
        db.session.commit()
        self.recipe_id = self.recipe.id

        self.client.post(
            "/api/auth/login",
            json={"login": "zootech-test-admin", "password": "zootech-test-secret"},
        )

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

    def test_master_diff_detects_kg_mismatch(self) -> None:
        seed_from_execution(self.recipe_id)
        header = LabRecipeRation.query.filter_by(recipe_id=self.recipe_id).first()
        line = LabRationLine.query.filter_by(recipe_id=self.recipe_id).first()
        line.daily_kg = 60.0
        db.session.commit()

        master_lines = [
            {"component_id": self.comp.id, "daily_kg": 60.0, "in_ration": True},
        ]
        exec_lines = [
            {"component_id": self.comp.id, "daily_kg_total": 50.0},
        ]
        diff = compare_master_execution(master_lines, exec_lines)
        self.assertTrue(diff["has_changes"])
        self.assertEqual(diff["lines"][0]["reasons"], ["kg_mismatch"])

    def test_apply_from_master_updates_ingredient(self) -> None:
        seed_from_execution(self.recipe_id)
        line = LabRationLine.query.filter_by(recipe_id=self.recipe_id).first()
        line.daily_kg = 30.0
        db.session.commit()

        result = apply_from_master(self.recipe_id)
        self.assertEqual(result["recipeId"], self.recipe_id)

        db.session.refresh(self.ingredient)
        self.assertAlmostEqual(float(self.ingredient.weight_per_head), 3.0, places=2)

    def test_recalculate_returns_indicators(self) -> None:
        seed_from_execution(self.recipe_id)
        result = recalculate_ration(self.recipe_id)
        self.assertIn("indicators", result)
        self.assertTrue(result["indicators"])

    def test_diff_api_after_seed(self) -> None:
        self.client.post(f"/api/lab/rations/{self.recipe_id}/seed-from-execution")
        r = self.client.get(f"/api/lab/rations/{self.recipe_id}/diff")
        self.assertEqual(r.status_code, 200)
        body = r.get_json()
        self.assertIn("hasChanges", body)