mod common;

use common::test_context::TestContext;
use diesel::{Connection, SqliteConnection};
use schist_fakes::{account::make_fake_account, category::make_fake_category, transaction::make_fake_transaction_builder, transaction_categorisation::make_fake_transaction_categorisation_builder};
use schist_models::{account::Account, category::Category, transaction::Transaction};
use schist_queries as queries;

fn given_accounts(connection: &mut SqliteConnection) -> Vec<Account> {
    let accounts = vec![make_fake_account(0)];
    let _ = queries::accounts::insert_accounts(&accounts, connection);
    accounts
}

fn given_categories(connection: &mut SqliteConnection) -> Vec<Category> {
    let categories = vec![make_fake_category(0), make_fake_category(1)];
    let _ = queries::categories::insert_categories(&categories, connection);
    categories
}

fn given_transactions(connection: &mut SqliteConnection) -> Vec<Transaction> {
    let transactions = vec![
        make_fake_transaction_builder(0).account_id(0).build().unwrap(),
        make_fake_transaction_builder(1).account_id(0).build().unwrap(),
    ];
    let _ = queries::transactions::insert_transactions(&transactions, connection);
    transactions
}

#[test]
fn when_insert_transaction_categorisations_then_returns_num_transaction_categorisations() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    given_accounts(connection);
    given_categories(connection);
    given_transactions(connection);
    let transaction_categorisations = [
        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
    ];

    let num_transaction_categorisations_inserted = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection).unwrap();

    assert_eq!(num_transaction_categorisations_inserted, 2);
}

#[test]
fn given_transaction_categorisations_when_get_all_transaction_categorisations_then_return_transaction_categorisations() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    given_accounts(connection);
    given_categories(connection);
    given_transactions(connection);
    let transaction_categorisations = [
        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
    ];
    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);

    let transaction_categorisations_in_db = queries::transaction_categorisations::get_all_transaction_categorisations(connection).unwrap();

    assert_eq!(transaction_categorisations_in_db.len(), transaction_categorisations.len());
    for transaction_categorisation in &transaction_categorisations {
        assert!(transaction_categorisations_in_db.iter().any(|transaction_categorisation_in_db| transaction_categorisation_in_db.eq(&transaction_categorisation)));
    }
    for transaction_categorisation_in_db in transaction_categorisations_in_db {
        assert!(transaction_categorisations.iter().any(|transaction_categorisation| transaction_categorisation.eq(&transaction_categorisation_in_db)));
    }
}

#[test]
fn given_transaction_categorisations_when_delete_all_transaction_categorisations_then_return_num_of_transaction_categorisations() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    given_accounts(connection);
    given_categories(connection);
    given_transactions(connection);
    let transaction_categorisations = [
        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
    ];
    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);

    let num_transaction_categorisations_deleted = queries::transaction_categorisations::delete_all_transaction_categorisations(connection).unwrap();

    assert_eq!(num_transaction_categorisations_deleted, transaction_categorisations.len());
}

#[test]
fn given_deleted_transaction_categorisations_when_get_all_transaction_categorisations_then_return_empty() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    given_accounts(connection);
    given_categories(connection);
    given_transactions(connection);
    let transaction_categorisations = [
        make_fake_transaction_categorisation_builder(0).category_id(0).build().unwrap(),
        make_fake_transaction_categorisation_builder(1).category_id(0).build().unwrap(),
    ];
    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);
    let _ = queries::transaction_categorisations::delete_all_transaction_categorisations(connection);

    let transaction_categorisations_returned = queries::transaction_categorisations::get_all_transaction_categorisations(connection).unwrap();

    assert_eq!(transaction_categorisations_returned.len(), 0);
}

#[test]
fn given_transaction_categorisations_when_sum_quantity_per_category_id_then_returns_sum_quantity_per_category_id() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    given_accounts(connection);
    let categories = given_categories(connection);
    given_transactions(connection);
    let transaction_categorisations = [
        make_fake_transaction_categorisation_builder(0).category_id(0).quantity(1).build().unwrap(),
        make_fake_transaction_categorisation_builder(1).category_id(0).quantity(2).build().unwrap(),
        make_fake_transaction_categorisation_builder(2).category_id(1).quantity(4).build().unwrap(),
    ];
    let _ = queries::transaction_categorisations::insert_transaction_categorisations(&transaction_categorisations, connection);

    let sums = queries::transaction_categorisations::sum_transaction_categorisation_quantity_per_category_id(connection);

    assert!(sums.is_ok());
    let mut sums = sums.unwrap();
    sums.sort_by_key(|sum| sum.0);
    assert_eq!(categories.len(), sums.len());
    assert_eq!(3, sums[0].1);
    assert_eq!(4, sums[1].1);
}