"""Tests for ledgerly.repository (schema, seeds, CRUD, reporting queries)."""

import sqlite3

import pytest

from ledgerly.errors import ConflictError
from ledgerly.models import DEFAULT_CATEGORIES, EXPENSE, INCOME
from ledgerly.repository import Repository, SqliteRepository


@pytest.fixture()
def repo():
    r = SqliteRepository(":memory:")
    yield r
    r.close()


def test_implements_protocol():
    r = SqliteRepository(":memory:")
    assert isinstance(r, Repository)
    r.close()


def test_seeds_default_categories(repo):
    cats = repo.list_categories()
    names = {name for name, _ in cats}
    assert "Salary" in names
    assert "Rent" in names
    assert len(cats) == len(DEFAULT_CATEGORIES)


def test_seed_idempotent(tmp_path):
    path = tmp_path / "sub" / "t.db"
    first = SqliteRepository(path)
    count = len(first.list_categories())
    first.close()
    second = SqliteRepository(path)
    assert len(second.list_categories()) == count
    second.close()


def test_deleted_categories_do_not_resurrect(tmp_path):
    path = tmp_path / "t.db"
    first = SqliteRepository(path)
    for name, _kind in first.list_categories():
        first.delete_category(first.find_category(name)[0])
    first.close()
    second = SqliteRepository(path)
    assert second.list_categories() == []
    second.close()


def test_create_category_duplicate_raises(repo):
    with pytest.raises(ConflictError):
        repo.create_category("Groceries", EXPENSE)


def test_find_category_case_insensitive(repo):
    _id, name, kind = repo.find_category("grocErIes")
    assert name == "Groceries"
    assert kind == EXPENSE


def test_find_category_missing(repo):
    assert repo.find_category("Nope") is None


def test_list_categories_income_first(repo):
    cats = repo.list_categories()
    kinds = [kind for _name, kind in cats]
    assert kinds.index(INCOME) < kinds.index(EXPENSE)


def test_category_in_use_transitions(repo):
    rent_id = repo.find_category("Rent")[0]
    assert not repo.category_in_use(rent_id)
    tx_id = repo.insert_transaction(100, rent_id, "2026-10-01", None)
    assert repo.category_in_use(rent_id)
    repo.delete_transaction(tx_id)
    assert not repo.category_in_use(rent_id)


def test_category_in_use_via_budget(repo):
    rent_id = repo.find_category("Rent")[0]
    repo.set_budget(rent_id, 1000)
    assert repo.category_in_use(rent_id)


def test_delete_category(repo):
    cat_id = repo.find_category("Rent")[0]
    repo.delete_category(cat_id)
    assert repo.find_category("Rent") is None


def test_insert_and_list_transactions(repo):
    cat_id = repo.find_category("Groceries")[0]
    repo.insert_transaction(8210, cat_id, "2026-10-02", "weekly shop")
    repo.insert_transaction(4500, cat_id, "2026-10-20", None)
    rows = repo.list_transactions(None, None, None)
    assert rows[0]["date"] == "2026-10-20"  # newest first
    assert rows[0]["category"] == "Groceries"
    assert rows[0]["note"] is None


def test_list_transactions_filters(repo):
    grocery_id = repo.find_category("Groceries")[0]
    salary_id = repo.find_category("Salary")[0]
    repo.insert_transaction(8210, grocery_id, "2026-10-02", None)
    repo.insert_transaction(4500, salary_id, "2026-11-01", None)
    assert len(repo.list_transactions("2026-10-01", "2026-10-31", None)) == 1
    assert len(repo.list_transactions(None, None, grocery_id)) == 1


def test_transaction_exists_and_delete(repo):
    cat_id = repo.find_category("Rent")[0]
    tx_id = repo.insert_transaction(150000, cat_id, "2026-10-01", None)
    assert repo.transaction_exists(tx_id)
    repo.delete_transaction(tx_id)
    assert not repo.transaction_exists(tx_id)


def test_insert_enforces_positive_amount(repo):
    cat_id = repo.find_category("Rent")[0]
    with pytest.raises(sqlite3.IntegrityError):
        repo.insert_transaction(0, cat_id, "2026-10-01", None)


def test_insert_enforces_foreign_key(repo):
    with pytest.raises(sqlite3.IntegrityError):
        repo.insert_transaction(100, 99999, "2026-10-01", None)


def test_set_budget_upsert(repo):
    cat_id = repo.find_category("Rent")[0]
    repo.set_budget(cat_id, 100000)
    assert repo.get_budget(cat_id) == 100000
    repo.set_budget(cat_id, 120000)
    assert repo.get_budget(cat_id) == 120000
    assert len(repo.list_budgets()) == 1


def test_delete_budget(repo):
    cat_id = repo.find_category("Rent")[0]
    assert not repo.delete_budget(cat_id)
    repo.set_budget(cat_id, 1000)
    assert repo.delete_budget(cat_id)
    assert repo.get_budget(cat_id) is None


def test_list_budgets_shape(repo):
    repo.set_budget(repo.find_category("Rent")[0], 12345)
    row = repo.list_budgets()[0]
    assert row["category"] == "Rent"
    assert row["kind"] == EXPENSE
    assert row["amount_cents"] == 12345


def test_income_expense_totals_empty(repo):
    assert repo.income_expense_totals("2026-10-01", "2026-10-31") == (0, 0)


def test_income_expense_totals(repo):
    salary_id = repo.find_category("Salary")[0]
    grocery_id = repo.find_category("Groceries")[0]
    repo.insert_transaction(300000, salary_id, "2026-10-01", None)
    repo.insert_transaction(50000, grocery_id, "2026-10-05", None)
    repo.insert_transaction(7777, grocery_id, "2026-09-05", None)  # out of range
    assert repo.income_expense_totals("2026-10-01", "2026-10-31") == (300000, 50000)


def test_category_totals_ordering(repo):
    salary_id = repo.find_category("Salary")[0]
    grocery_id = repo.find_category("Groceries")[0]
    rent_id = repo.find_category("Rent")[0]
    repo.insert_transaction(300000, salary_id, "2026-10-01", None)
    repo.insert_transaction(50000, grocery_id, "2026-10-05", None)
    repo.insert_transaction(99999, rent_id, "2026-10-03", None)
    rows = repo.category_totals("2026-10-01", "2026-10-31")
    assert [r["category"] for r in rows] == ["Salary", "Rent", "Groceries"]


def test_context_manager_closes(tmp_path):
    path = tmp_path / "t.db"
    with SqliteRepository(path) as repo:
        assert repo is not None
    with pytest.raises(sqlite3.ProgrammingError):
        repo.list_categories()