use budgeting_app_core::{models::date_utc::DateUtc, queries, traits::nowlike::Nowlike};
use diesel::{Connection, SqliteConnection};

use crate::common::{fakes::{budget_update::make_fake_budget_update_builder, category::make_fake_category}, test_context::TestContext};

fn insert_prerequisite_data(connection: &mut SqliteConnection) {
    let categories = [make_fake_category(0), make_fake_category(1)];
    let _ = queries::categories::insert_categories(&categories, connection);
}

#[test]
fn when_insert_budget_updates_then_returns_num_budget_updates() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .category_id(0)
            .build().unwrap(),
        make_fake_budget_update_builder(1)
            .date(DateUtc::from_ymd(2020, 12, 26).unwrap())
            .category_id(0)
            .build().unwrap(),
    ];

    let num_budget_updates_inserted = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    assert_eq!(num_budget_updates_inserted, 2);
}

#[test]
fn given_budget_update_when_insert_budget_update_same_category_and_same_date_then_return_err() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);

    let budget_updates_1 = [
        make_fake_budget_update_builder(0)
            .category_id(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .build().unwrap()
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates_1, connection);

    let budget_updates_2 = [
        make_fake_budget_update_builder(1)
            .category_id(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .build().unwrap()
    ];
    let result = queries::budget_updates::insert_budget_updates(&budget_updates_2, connection);

    assert!(result.is_err());
}

#[test]
fn given_budget_update_when_insert_budget_update_different_category_and_same_date_then_return_num_budget_updates_inserted() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);

    let budget_updates_1 = [
        make_fake_budget_update_builder(0)
            .category_id(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .build().unwrap()
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates_1, connection);

    let budget_updates_2 = [
        make_fake_budget_update_builder(1)
            .category_id(1)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .build().unwrap()
    ];
    let result = queries::budget_updates::insert_budget_updates(&budget_updates_2, connection);

    assert!(result.is_ok());
    assert_eq!(result.unwrap(), 1);
}

#[test]
fn given_budget_update_when_insert_budget_update_same_category_and_different_date_then_return_num_budget_updates_inserted() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);

    let budget_updates_1 = [
        make_fake_budget_update_builder(0)
            .category_id(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .build().unwrap()
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates_1, connection);

    let budget_updates_2 = [
        make_fake_budget_update_builder(1)
            .category_id(0)
            .date(DateUtc::from_ymd(2020, 12, 26).unwrap())
            .build().unwrap()
    ];
    let result = queries::budget_updates::insert_budget_updates(&budget_updates_2, connection);

    assert!(result.is_ok());
    assert_eq!(result.unwrap(), 1);
}

#[test]
fn given_budget_updates_when_get_all_budget_updates_then_return_budget_updates() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .category_id(0)
            .build().unwrap(),
        make_fake_budget_update_builder(1)
            .date(DateUtc::from_ymd(2020, 12, 26).unwrap())
            .category_id(0)
            .build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    let budget_updates_in_db = queries::budget_updates::get_all_budget_updates(connection).unwrap();

    assert_eq!(budget_updates_in_db.len(), budget_updates.len());
    assert_eq!(budget_updates_in_db[0], budget_updates[0]);
    assert_eq!(budget_updates_in_db[1], budget_updates[1]);
    for budget_update in &budget_updates {
        assert!(budget_updates_in_db.iter().any(|budget_update_in_db| budget_update_in_db.eq(&budget_update)));
    }
    for budget_update_in_db in budget_updates_in_db {
        assert!(budget_updates.iter().any(|budget_update| budget_update.eq(&budget_update_in_db)));
    }
}

#[test]
fn given_budget_updates_when_delete_all_budget_updates_then_return_num_of_budget_updates() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .category_id(0)
            .build().unwrap(),
        make_fake_budget_update_builder(1)
            .date(DateUtc::from_ymd(2020, 12, 26).unwrap())
            .category_id(0)
            .build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    let num_budget_updates_deleted = queries::budget_updates::delete_all_budget_updates(connection).unwrap();

    assert_eq!(num_budget_updates_deleted, budget_updates.len());
}

#[test]
fn given_deleted_budget_updates_when_get_all_budget_updates_then_return_empty() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .date(DateUtc::from_ymd(2020, 12, 25).unwrap())
            .category_id(0)
            .build().unwrap(),
        make_fake_budget_update_builder(1)
            .date(DateUtc::from_ymd(2020, 12, 26).unwrap())
            .category_id(0)
            .build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();
    let _ = queries::budget_updates::delete_all_budget_updates(connection).unwrap();

    let budget_updates_returned = queries::budget_updates::get_all_budget_updates(connection).unwrap();

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

#[test]
fn given_no_budget_updates_when_get_first_with_date_then_return_none() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();

    let first_with_date = queries::budget_updates::get_first_budget_update_with_date(&DateUtc::now(), connection).unwrap();

    assert!(first_with_date.is_none());
}

#[test]
fn given_budget_update_when_get_first_with_date_then_return_budget_update() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let date: DateUtc = "2024-10-28".parse().unwrap();
    let budget_update = make_fake_budget_update_builder(0).date(date.clone()).build().unwrap();
    let _ = queries::budget_updates::insert_budget_updates(&[budget_update.clone()], connection).unwrap();

    let first_with_date = queries::budget_updates::get_first_budget_update_with_date(&date, connection).unwrap();

    assert!(first_with_date.is_some());
    assert_eq!(first_with_date.unwrap(), budget_update);
}

#[test]
fn given_budget_update_when_get_first_with_different_date_then_return_none() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let date: DateUtc = "2024-10-28".parse().unwrap();
    let different_date: DateUtc = "2024-10-29".parse().unwrap();
    let budget_update = make_fake_budget_update_builder(0).date(date.clone()).build().unwrap();
    let _ = queries::budget_updates::insert_budget_updates(&[budget_update.clone()], connection).unwrap();

    let first_with_date = queries::budget_updates::get_first_budget_update_with_date(
        &different_date,
        connection
    ).unwrap();

    assert!(first_with_date.is_none());
}

#[test]
fn given_many_budget_updates_when_get_first_with_date_then_return_any_with_date() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0).date("2024-12-25".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(1).date("2020-12-26".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(2).date("2020-12-27".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(3).date("2020-12-28".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(4).date("2020-12-29".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(5).date("2020-12-30".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(6).date("2020-12-31".parse().unwrap()).build().unwrap(),
        make_fake_budget_update_builder(7).date("2021-01-01".parse().unwrap()).build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    let first_with_date = queries::budget_updates::get_first_budget_update_with_date(
        &"2024-12-25".parse().unwrap(),
        connection,
    ).unwrap();

    assert!(first_with_date.is_some());
    assert_eq!(first_with_date.unwrap(), budget_updates[0]);
}

#[test]
fn given_many_budget_updates_when_get_most_recent_with_category_id_then_return_correct_date() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .category_id(0)
            .date("2024-12-25".parse().unwrap())
            .build().unwrap(),
        make_fake_budget_update_builder(1)
            .category_id(0)
            .date("2020-12-26".parse().unwrap())
            .build().unwrap(),
        make_fake_budget_update_builder(2)
            .category_id(1)
            .date("2020-12-27".parse().unwrap())
            .build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    let most_recent_with_category = queries::budget_updates::get_most_recent_budget_update_date_with_category_id(
        0, connection,
    );

    assert!(most_recent_with_category.is_ok());
    let most_recent_with_category = most_recent_with_category.unwrap();
    assert!(most_recent_with_category .is_some());
    let most_recent_with_category = most_recent_with_category.unwrap();
    assert_eq!(most_recent_with_category, budget_updates[1].date);
}

#[test]
fn given_budget_update_when_get_most_recent_with_different_category_id_then_return_none() {
    let context = TestContext::new();
    let connection = &mut SqliteConnection::establish(&context.db_url).unwrap();
    insert_prerequisite_data(connection);
    let budget_updates = [
        make_fake_budget_update_builder(0)
            .category_id(1)
            .date("2020-12-27".parse().unwrap())
            .build().unwrap(),
    ];
    let _ = queries::budget_updates::insert_budget_updates(&budget_updates, connection).unwrap();

    let most_recent_with_category = queries::budget_updates::get_most_recent_budget_update_date_with_category_id(
        0, connection,
    );

    assert!(most_recent_with_category.is_ok());
    let most_recent_with_category = most_recent_with_category.unwrap();
    assert!(most_recent_with_category .is_none());
}