//! Dönem kapanışı → birikim: onayla TL varlığına ekleme, bekleyenler, yeniden kapatmada
//! bağlı kaydın güncellenmesi / silinmesi, birikimden çıkış varsa reddedilmesi.

mod common;

use axum::http::StatusCode;
use common::{Session, TestApp};
use serde_json::{Value, json};

/// Ekim: gelir 10.000, harcama 3.000 → gerçekleşen 7.000; `to_savings` ile kapatılır
async fn october(app: &TestApp, s: &Session, to_savings: i64) -> String {
    let (_, p) = app
        .post(
            "/periods",
            s,
            json!({ "start_date": "2026-10-01", "end_date": "2026-11-01" }),
        )
        .await;
    let id = p["id"].as_str().unwrap().to_string();
    app.post(
        &format!("/periods/{id}/plan-items"),
        s,
        json!({ "kind": "income", "name": "Maaş", "amount": 1_000_000 }),
    )
    .await;
    let (_, cats) = app.get("/categories", s).await;
    let cat = cats[0]["id"].as_str().unwrap();
    app.post(
        &format!("/periods/{id}/entries"),
        s,
        json!({ "date": "2026-10-10", "amount": 300_000, "category_id": cat }),
    )
    .await;
    close(app, s, &id, to_savings).await;
    id
}

async fn close(app: &TestApp, s: &Session, id: &str, to_savings: i64) -> Value {
    let (st, b) = app
        .post(
            &format!("/periods/{id}/close"),
            s,
            json!({ "to_savings": to_savings }),
        )
        .await;
    assert_eq!(st, StatusCode::OK, "{b}");
    b
}

async fn reopen(app: &TestApp, s: &Session, id: &str) {
    let (st, b) = app
        .post(&format!("/periods/{id}/reopen"), s, json!({}))
        .await;
    assert_eq!(st, StatusCode::OK, "{b}");
}

async fn cash(app: &TestApp, s: &Session) -> Value {
    let (_, list) = app.get("/assets", s).await;
    list.as_array()
        .unwrap()
        .iter()
        .find(|a| a["code"] == "TRY")
        .unwrap()
        .clone()
}

async fn cash_txs(app: &TestApp, s: &Session) -> Vec<Value> {
    let id = cash(app, s).await["id"].as_str().unwrap().to_string();
    let (_, list) = app.get(&format!("/assets/{id}/transactions"), s).await;
    list.as_array().unwrap().clone()
}

#[tokio::test]
async fn add_closing_savings_once() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let oct = october(&app, &s, 500_000).await;

    let (_, pending) = app.get("/savings/pending", &s).await;
    assert_eq!(
        pending,
        json!([{ "period_id": oct, "name": "Ekim 2026", "last_date": "2026-10-31", "to_savings": 500_000 }])
    );

    let (st, t) = app
        .post(&format!("/periods/{oct}/to-savings"), &s, json!({}))
        .await;
    assert_eq!(st, StatusCode::CREATED, "{t}");
    assert_eq!(t["type"], "buy");
    assert_eq!(t["total"], 500_000);
    assert_eq!(t["date"], "2026-10-31");
    assert_eq!(t["note"], "Ekim 2026 kapanışı");
    assert_eq!(t["source_period_id"], oct.as_str());
    assert_eq!(cash(&app, &s).await["cost"], 500_000);

    let (st, b) = app
        .post(&format!("/periods/{oct}/to-savings"), &s, json!({}))
        .await;
    assert_eq!(st, StatusCode::CONFLICT, "{b}");
    let (_, pending) = app.get("/savings/pending", &s).await;
    assert_eq!(pending, json!([]));

    // Açık dönem eklenemez; başka hane göremez
    let (_, nov) = app
        .post(
            "/periods",
            &s,
            json!({ "start_date": "2026-11-01", "end_date": "2026-12-01" }),
        )
        .await;
    let (st, _) = app
        .post(
            &format!("/periods/{}/to-savings", nov["id"].as_str().unwrap()),
            &s,
            json!({}),
        )
        .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    let other = app.register("Diger", None).await;
    let (st, _) = app
        .post(&format!("/periods/{oct}/to-savings"), &other, json!({}))
        .await;
    assert_eq!(st, StatusCode::NOT_FOUND);
    let (_, op) = app.get("/savings/pending", &other).await;
    assert_eq!(op, json!([]));

    // Silinen kayıt → dönem yeniden "bekleyen" olur
    let (st, _) = app
        .delete(
            &format!("/asset-transactions/{}", t["id"].as_str().unwrap()),
            &s,
        )
        .await;
    assert_eq!(st, StatusCode::NO_CONTENT);
    let (_, pending) = app.get("/savings/pending", &s).await;
    assert_eq!(pending.as_array().unwrap().len(), 1);
    app.cleanup().await;
}

#[tokio::test]
async fn reclosing_updates_or_removes_linked_savings() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let oct = october(&app, &s, 500_000).await;
    app.post(&format!("/periods/{oct}/to-savings"), &s, json!({}))
        .await;

    // Yeni tutarla yeniden kapat → kayıt güncellenir
    reopen(&app, &s, &oct).await;
    let b = close(&app, &s, &oct, 400_000).await;
    assert_eq!(b["savings_linked"], true);
    let txs = cash_txs(&app, &s).await;
    assert_eq!(txs.len(), 1);
    assert_eq!(txs[0]["total"], 400_000);
    assert_eq!(txs[0]["version"], 2);
    assert_eq!(cash(&app, &s).await["cost"], 400_000);

    // Birikim 0 → kayıt silinir; bekleyen de yok
    reopen(&app, &s, &oct).await;
    let b = close(&app, &s, &oct, 0).await;
    assert_eq!(b["savings_linked"], false);
    assert!(cash_txs(&app, &s).await.is_empty());
    let (_, pending) = app.get("/savings/pending", &s).await;
    assert_eq!(pending, json!([]));

    // Kayıt yokken yeniden kapat → otomatik eklenmez, bekleyenlere düşer
    reopen(&app, &s, &oct).await;
    let b = close(&app, &s, &oct, 600_000).await;
    assert_eq!(b["savings_linked"], false);
    assert!(cash_txs(&app, &s).await.is_empty());
    let (_, pending) = app.get("/savings/pending", &s).await;
    assert_eq!(pending[0]["to_savings"], 600_000);
    app.cleanup().await;
}

#[tokio::test]
async fn reclosing_is_refused_when_savings_were_spent() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let oct = october(&app, &s, 500_000).await;
    app.post(&format!("/periods/{oct}/to-savings"), &s, json!({}))
        .await;
    // Birikimden 4.500 TL çıkış
    let cash_id = cash(&app, &s).await["id"].as_str().unwrap().to_string();
    let (st, _) = app
        .post(
            &format!("/assets/{cash_id}/transactions"),
            &s,
            json!({ "type": "sell", "date": "2026-11-05", "total": 450_000 }),
        )
        .await;
    assert_eq!(st, StatusCode::CREATED);

    reopen(&app, &s, &oct).await;
    let (st, b) = app
        .post(
            &format!("/periods/{oct}/close"),
            &s,
            json!({ "to_savings": 300_000 }),
        )
        .await;
    assert_eq!(st, StatusCode::CONFLICT, "{b}");
    assert!(
        b["error"]["message"]
            .as_str()
            .unwrap()
            .contains("TL çıkışları"),
        "{b}"
    );
    // Hiçbir şey değişmedi: dönem düzeltmede, kayıt 5.000 TL
    let (_, p) = app.get(&format!("/periods/{oct}"), &s).await;
    assert_eq!(p["status"], "correcting");
    let buy = cash_txs(&app, &s)
        .await
        .into_iter()
        .find(|t| t["type"] == "buy")
        .unwrap();
    assert_eq!(buy["total"], 500_000);
    // Yeterli tutarla kapanır
    let b = close(&app, &s, &oct, 450_000).await;
    assert_eq!(b["savings_linked"], true);
    app.cleanup().await;
}