from __future__ import annotations

import sqlite3
from pathlib import Path
from types import SimpleNamespace

import pytest
from peewee import IntegrityError, DoesNotExist

from funkyjuicerecipes.data.db import init_database, DB_FILENAME
from funkyjuicerecipes.data.dao.flavors import FlavorRepository
from funkyjuicerecipes.data.dao.recipes import RecipeRepository
from funkyjuicerecipes.data.models.flavor import Flavor
from funkyjuicerecipes.data.models.recipe_flavor import RecipeFlavor
from funkyjuicerecipes.data.models.flavor import Flavor as FlavorModel


class DummyPaths(SimpleNamespace):
    @property
    def data(self) -> Path:  # type: ignore[override]
        return self._data

    @data.setter
    def data(self, value: Path) -> None:
        self._data = Path(value)


class DummyApp(SimpleNamespace):
    def __init__(self, data_dir: Path) -> None:
        super().__init__()
        self.paths = DummyPaths()
        self.paths.data = data_dir


def _init_db(tmp_path: Path):
    app = DummyApp(tmp_path / "data")
    db = init_database(app)
    return app, db


def test_flavor_uniqueness_nocase(tmp_path: Path):
    app, db = _init_db(tmp_path)
    flavors = FlavorRepository()

    f1 = flavors.create(name="Strawberry", company="TPA", base="PG")
    assert f1.id is not None

    with pytest.raises(IntegrityError):
        flavors.create(name="strawberry", company="tpa", base="PG")


def test_flavor_soft_delete_and_listing_filters(tmp_path: Path):
    app, db = _init_db(tmp_path)
    flavors = FlavorRepository()

    f1 = flavors.create(name="Vanilla", company="CAP", base="PG")
    f2 = flavors.create(name="Cookie", company="FA", base="PG")

    # default list excludes deleted
    rows = flavors.list()
    assert [f.name for f in rows] == ["Cookie", "Vanilla"] or [f.name for f in rows] == ["Vanilla", "Cookie"]

    # soft delete f2
    assert flavors.soft_delete(f2.id) is True

    rows_default = flavors.list()
    assert all(not r.is_deleted for r in rows_default)
    assert {r.id for r in rows_default} == {f1.id}

    rows_only_deleted = flavors.list(only_deleted=True)
    assert {r.id for r in rows_only_deleted} == {f2.id}

    rows_include_deleted = flavors.list(include_deleted=True)
    assert {r.id for r in rows_include_deleted} == {f1.id, f2.id}

    # undelete brings it back to default list
    assert flavors.undelete(f2.id) is True
    rows_default2 = flavors.list()
    assert {r.id for r in rows_default2} == {f1.id, f2.id}

    # hard delete safety: referenced flavor cannot be deleted
    recipes = RecipeRepository()
    r = recipes.create(
        name="Test Mix",
        size_ml=30,
        base_pg_pct=50,
        base_vg_pct=50,
        nic_target_mg_per_ml=0,
        nic_base="PG",
        ingredients=[(f1.id, 5.0)],
    )

    # now f1 is referenced; hard delete should be blocked
    assert flavors.hard_delete_when_safe(f1.id) is False
    # f2 is not referenced; can be hard-deleted
    assert flavors.hard_delete_when_safe(f2.id) is True
    with pytest.raises(DoesNotExist):
        Flavor.get_by_id(f2.id)


def test_recipe_creation_and_get_with_ingredients_includes_soft_deleted_flavors(tmp_path: Path):
    app, db = _init_db(tmp_path)
    flavors = FlavorRepository()
    recipes = RecipeRepository()

    fa = flavors.create(name="Apple", company="FA", base="PG")
    fb = flavors.create(name="Berry", company="CAP", base="VG")

    # Soft delete one flavor
    flavors.soft_delete(fb.id)

    r = recipes.create(
        name="Fruit",
        size_ml=60,
        base_pg_pct=70,
        base_vg_pct=30,
        nic_target_mg_per_ml=3,
        nic_base="PG",
        ingredients=[(fa.id, 4.0), (fb.id, 2.0)],
    )

    r2, pairs = recipes.get_with_ingredients(r.id)
    assert r2.id == r.id
    # Both flavors should be present, including the soft-deleted one
    got = {fl.id: pct for (fl, pct) in pairs}
    assert got == {fa.id: 4.0, fb.id: 2.0}
    # Verify the deleted flag is visible on the soft-deleted flavor
    deleted_flavor = next(fl for (fl, pct) in pairs if fl.id == fb.id)
    assert deleted_flavor.is_deleted is True


def test_replace_ingredients_diff_behavior(tmp_path: Path):
    app, db = _init_db(tmp_path)
    flavors = FlavorRepository()
    recipes = RecipeRepository()

    f1 = flavors.create(name="Lemon", company="FA", base="PG")
    f2 = flavors.create(name="Lime", company="FA", base="PG")
    f3 = flavors.create(name="Orange", company="FA", base="PG")

    r = recipes.create(
        name="Citrus",
        size_ml=30,
        base_pg_pct=50,
        base_vg_pct=50,
        nic_target_mg_per_ml=0,
        nic_base="PG",
        ingredients=[(f1.id, 3.0), (f2.id, 2.0)],
    )

    # Capture initial rows
    rf_rows = list(
        RecipeFlavor.select().where(RecipeFlavor.recipe == r.id).order_by(RecipeFlavor.id)
    )
    assert len(rf_rows) == 2
    rf_f1 = next(x for x in rf_rows if x.flavor_id == f1.id)
    rf_f2 = next(x for x in rf_rows if x.flavor_id == f2.id)

    # Now: remove f1, update f2 pct, add f3
    recipes.replace_ingredients(r.id, [(f2.id, 5.5), (f3.id, 1.0)])

    rf_rows_after = list(
        RecipeFlavor.select().where(RecipeFlavor.recipe == r.id).order_by(RecipeFlavor.id)
    )
    assert len(rf_rows_after) == 2
    flavors_after = {x.flavor_id for x in rf_rows_after}
    assert flavors_after == {f2.id, f3.id}

    # f2 row should be updated in-place (same id) with new pct
    rf_f2_after = next(x for x in rf_rows_after if x.flavor_id == f2.id)
    assert rf_f2_after.id == rf_f2.id
    assert pytest.approx(rf_f2_after.pct, rel=1e-9) == 5.5

    # f1 row should be gone
    assert not RecipeFlavor.select().where(
        (RecipeFlavor.recipe == r.id) & (RecipeFlavor.flavor == f1.id)
    ).exists()

    # f3 should be newly present
    assert RecipeFlavor.select().where(
        (RecipeFlavor.recipe == r.id) & (RecipeFlavor.flavor == f3.id)
    ).exists()


def test_flavor_snapshots_populated_and_stable(tmp_path: Path):
    app, db = _init_db(tmp_path)
    flavors = FlavorRepository()
    recipes = RecipeRepository()

    # Create a flavor and recipe using it
    f = flavors.create(name="Vanilla", company="CAP", base="PG")
    r = recipes.create(
        name="Vanilla Mix",
        size_ml=30,
        base_pg_pct=50,
        base_vg_pct=50,
        nic_target_mg_per_ml=0,
        nic_base="PG",
        ingredients=[(f.id, 5.0)],
    )

    rf = RecipeFlavor.get(RecipeFlavor.recipe == r.id)
    assert rf.flavor_id == f.id
    # Snapshots should be populated at creation time
    assert rf.flavor_name_snapshot == "Vanilla"
    assert rf.flavor_company_snapshot == "CAP"
    assert rf.flavor_base_snapshot == "PG"

    # Change the live Flavor fields
    flavors.update(f.id, name="Vanilla Bean", company="Capella", base="VG")

    # Snapshots must remain unchanged
    rf2 = RecipeFlavor.get_by_id(rf.id)
    assert rf2.flavor_name_snapshot == "Vanilla"
    assert rf2.flavor_company_snapshot == "CAP"
    assert rf2.flavor_base_snapshot == "PG"

    # Pct-only update should not touch snapshots
    recipes.replace_ingredients(r.id, [(f.id, 7.5)])
    rf3 = RecipeFlavor.get(RecipeFlavor.recipe == r.id)
    assert rf3.pct == 7.5
    assert rf3.flavor_name_snapshot == "Vanilla"
    assert rf3.flavor_company_snapshot == "CAP"
    assert rf3.flavor_base_snapshot == "PG"

    # Replacing with a different flavor should capture new snapshots
    f2 = flavors.create(name="Cookie", company="FA", base="VG")
    recipes.replace_ingredients(r.id, [(f2.id, 2.0)])
    rf_after = RecipeFlavor.get(RecipeFlavor.recipe == r.id)
    assert rf_after.flavor_id == f2.id
    assert rf_after.pct == 2.0
    assert rf_after.flavor_name_snapshot == "Cookie"
    assert rf_after.flavor_company_snapshot == "FA"
    assert rf_after.flavor_base_snapshot == "VG"