//! Birikimler: varsayılan varlıklar, döviz ekleme, alım/satım, ortalama maliyet,
//! eldekinden fazla satış kuralı (geriye tarihli kayıt, düzenleme, silme), migration v2.

mod common;

use axum::http::StatusCode;
use common::{Session, TestApp};
use mongodb::bson::{Document, Uuid, doc};
use serde_json::{Value, json};

const GR: i64 = 1_000_000;

async fn assets(app: &TestApp, s: &Session) -> Vec<Value> {
    let (st, b) = app.get("/assets", s).await;
    assert_eq!(st, StatusCode::OK, "{b}");
    b.as_array().unwrap().clone()
}

async fn asset(app: &TestApp, s: &Session, code: &str) -> Value {
    assets(app, s)
        .await
        .into_iter()
        .find(|a| a["code"] == code)
        .unwrap_or_else(|| panic!("{code} yok"))
}

async fn tx(app: &TestApp, s: &Session, asset_id: &str, body: Value) -> (StatusCode, Value) {
    app.post(&format!("/assets/{asset_id}/transactions"), s, body)
        .await
}

fn id(v: &Value) -> String {
    v["id"].as_str().unwrap().to_string()
}

#[tokio::test]
async fn default_assets_and_custom_fx() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let list = assets(&app, &s).await;
    let codes: Vec<&str> = list.iter().map(|a| a["code"].as_str().unwrap()).collect();
    assert_eq!(
        codes,
        [
            "TRY",
            "XAU_GRAM",
            "XAU_CEYREK",
            "XAU_YARIM",
            "XAU_TAM",
            "XAU_ONS",
            "USD",
            "EUR"
        ]
    );
    assert_eq!(list[0]["kind"], "cash");
    assert_eq!(list[1]["unit_label"], "gr");
    assert_eq!(list[1]["quantity_e6"], 0);
    assert_eq!(list[1]["avg_cost_e6"], Value::Null);

    let (st, gbp) = app
        .post(
            "/assets",
            &s,
            json!({ "code": " gbp ", "name": "İngiliz Sterlini", "unit_label": "£" }),
        )
        .await;
    assert_eq!(st, StatusCode::CREATED, "{gbp}");
    assert_eq!(gbp["code"], "GBP");
    assert_eq!(gbp["kind"], "fx");
    let (st, _) = app
        .post("/assets", &s, json!({ "code": "GBP", "name": "Tekrar" }))
        .await;
    assert_eq!(st, StatusCode::CONFLICT);
    let (st, _) = app
        .post("/assets", &s, json!({ "code": "GB1", "name": "Hatalı" }))
        .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    assert_eq!(
        assets(&app, &s).await.last().unwrap()["code"],
        "GBP",
        "sona eklenir"
    );

    // Başka hane: görmez, işlem ekleyemez
    let other = app.register("Diger", None).await;
    assert_eq!(assets(&app, &other).await.len(), 8);
    let (st, _) = tx(
        &app,
        &other,
        &id(&gbp),
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": GR, "total": 5_000 }),
    )
    .await;
    assert_eq!(st, StatusCode::NOT_FOUND);
    let (st, _) = app
        .get(&format!("/assets/{}/transactions", id(&gbp)), &other)
        .await;
    assert_eq!(st, StatusCode::NOT_FOUND);
    app.cleanup().await;
}

#[tokio::test]
async fn weighted_average_cost_and_oversell() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let gram = id(&asset(&app, &s, "XAU_GRAM").await);

    // 10 gr 30.000 TL (birim fiyat hesaplanır), 10 gr 40.000 TL, 5 gr 22.500 TL'ye satış
    let (st, b1) = tx(
        &app,
        &s,
        &gram,
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": 10 * GR, "total": 3_000_000 }),
    )
    .await;
    assert_eq!(st, StatusCode::CREATED, "{b1}");
    assert_eq!(b1["unit_price_e6"], 3_000_000_000_i64);
    let (st, b2) = tx(&app, &s, &gram, json!({ "type": "buy", "date": "2026-11-05", "quantity_e6": 10 * GR, "unit_price_e6": 3_990_000_000_i64, "total": 4_000_000, "note": " komisyon dahil " })).await;
    assert_eq!(st, StatusCode::CREATED, "{b2}");
    assert_eq!(
        b2["unit_price_e6"], 3_990_000_000_i64,
        "girilen birim fiyat korunur"
    );
    assert_eq!(b2["note"], "komisyon dahil");
    let (st, _) = tx(
        &app,
        &s,
        &gram,
        json!({ "type": "sell", "date": "2026-11-10", "quantity_e6": 5 * GR, "total": 2_250_000 }),
    )
    .await;
    assert_eq!(st, StatusCode::CREATED);

    let a = asset(&app, &s, "XAU_GRAM").await;
    assert_eq!(a["quantity_e6"], 15 * GR);
    assert_eq!(
        a["cost"], 5_250_000,
        "maliyet tutardan (birim fiyattan değil)"
    );
    assert_eq!(a["avg_cost_e6"], 3_500_000_000_i64);
    assert_eq!(a["realized_pl"], 500_000);
    assert_eq!(a["tx_count"], 3);

    // Eldekinden fazla satış
    let (st, b) = tx(
        &app,
        &s,
        &gram,
        json!({ "type": "sell", "date": "2026-11-12", "quantity_e6": 16 * GR, "total": 1 }),
    )
    .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    assert_eq!(
        b["error"]["message"], "Satış miktarı o tarihte eldeki miktarı aşıyor",
        "{b}"
    );
    // Geriye tarihli: ilk alımdan önce satış
    let (st, _) = tx(
        &app,
        &s,
        &gram,
        json!({ "type": "sell", "date": "2026-10-31", "quantity_e6": GR, "total": 300_000 }),
    )
    .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    // Aynı gün: alımdan sonra eklenen satış geçerli (15 gr elde)
    let (st, _) = tx(
        &app,
        &s,
        &gram,
        json!({ "type": "sell", "date": "2026-11-01", "quantity_e6": 10 * GR, "total": 3_100_000 }),
    )
    .await;
    assert_eq!(st, StatusCode::CREATED);

    // Hatalı girişler
    for body in [
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": 0, "total": 100 }),
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": GR, "total": 0 }),
        json!({ "type": "buy", "date": "2026-02-30", "quantity_e6": GR, "total": 100 }),
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": GR, "unit_price_e6": -1, "total": 100 }),
    ] {
        let (st, b) = tx(&app, &s, &gram, body.clone()).await;
        assert_eq!(st, StatusCode::BAD_REQUEST, "{body} → {b}");
    }

    // TL: miktar = tutar, birim fiyat 1
    let try_id = id(&asset(&app, &s, "TRY").await);
    let (st, t) = tx(
        &app,
        &s,
        &try_id,
        json!({ "type": "buy", "date": "2026-11-30", "quantity_e6": 999, "total": 250_050 }),
    )
    .await;
    assert_eq!(st, StatusCode::CREATED, "{t}");
    assert_eq!(t["quantity_e6"], 2_500_500_000_i64, "2.500,50 TL");
    assert_eq!(t["unit_price_e6"], GR);
    let a = asset(&app, &s, "TRY").await;
    assert_eq!(a["cost"], 250_050);
    assert_eq!(a["avg_cost_e6"], GR);
    app.cleanup().await;
}

#[tokio::test]
async fn edits_and_deletes_keep_history_consistent() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let usd = id(&asset(&app, &s, "USD").await);
    let (_, b1) = tx(
        &app,
        &s,
        &usd,
        json!({ "type": "buy", "date": "2026-11-01", "quantity_e6": 100 * GR, "total": 4_100_000 }),
    )
    .await;
    let (_, b2) = tx(
        &app,
        &s,
        &usd,
        json!({ "type": "buy", "date": "2026-11-03", "quantity_e6": 100 * GR, "total": 4_200_000 }),
    )
    .await;
    let (_, sell) = tx(&app, &s, &usd, json!({ "type": "sell", "date": "2026-11-05", "quantity_e6": 150 * GR, "total": 6_400_000 })).await;

    // Geçmiş: en yeni başta
    let (_, list) = app.get(&format!("/assets/{usd}/transactions"), &s).await;
    let dates: Vec<&str> = list
        .as_array()
        .unwrap()
        .iter()
        .map(|t| t["date"].as_str().unwrap())
        .collect();
    assert_eq!(dates, ["2026-11-05", "2026-11-03", "2026-11-01"]);

    // Alımlardan biri silinirse satış eksiye düşer → reddedilir
    let (st, b) = app
        .delete(&format!("/asset-transactions/{}", id(&b1)), &s)
        .await;
    assert_eq!(st, StatusCode::CONFLICT, "{b}");
    // Satışı büyütmek → eksi
    let (st, _) = app
        .patch(
            &format!("/asset-transactions/{}", id(&sell)),
            &s,
            json!({ "quantity_e6": 250 * GR }),
        )
        .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    // 2. alımı satıştan sonraya taşımak → satış anında yalnızca 100 $ var
    let (st, _) = app
        .patch(
            &format!("/asset-transactions/{}", id(&b2)),
            &s,
            json!({ "date": "2026-11-06" }),
        )
        .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    // Sürüm çakışması
    let (st, _) = app
        .patch(
            &format!("/asset-transactions/{}", id(&b2)),
            &s,
            json!({ "note": "x", "version": 99 }),
        )
        .await;
    assert_eq!(st, StatusCode::CONFLICT);

    // Geçerli düzenleme: satış 100 $ → sonra 2. alım silinebilir
    let (st, e) = app
        .patch(
            &format!("/asset-transactions/{}", id(&sell)),
            &s,
            json!({ "quantity_e6": 100 * GR, "total": 4_300_000, "version": 1 }),
        )
        .await;
    assert_eq!(st, StatusCode::OK, "{e}");
    assert_eq!(
        e["unit_price_e6"], 430_000_000,
        "43.000 TL / 100 → 430 TL, birim fiyat yeniden hesaplandı"
    );
    assert_eq!(e["version"], 2);
    let (st, _) = app
        .delete(&format!("/asset-transactions/{}", id(&b2)), &s)
        .await;
    assert_eq!(st, StatusCode::NO_CONTENT);
    let a = asset(&app, &s, "USD").await;
    assert_eq!(a["quantity_e6"], 0);
    assert_eq!(a["cost"], 0);
    assert_eq!(a["realized_pl"], 200_000, "43.000 − 41.000");
    assert_eq!(a["tx_count"], 2, "silinen sayılmaz");

    // Pasif varlığa işlem eklenmez, ama listede kalır
    let (st, _) = app
        .patch(&format!("/assets/{usd}"), &s, json!({ "is_active": false }))
        .await;
    assert_eq!(st, StatusCode::OK);
    let (st, _) = tx(
        &app,
        &s,
        &usd,
        json!({ "type": "buy", "date": "2026-11-07", "quantity_e6": GR, "total": 4_300 }),
    )
    .await;
    assert_eq!(st, StatusCode::BAD_REQUEST);
    assert_eq!(asset(&app, &s, "USD").await["is_active"], false);
    app.cleanup().await;
}

#[tokio::test]
async fn migration_adds_defaults_to_existing_households_once() {
    let app = TestApp::new().await;
    let s = app.register("Test", None).await;
    let hid = Uuid::parse_str(&s.household_id).unwrap();
    // Faz 8 öncesi hane: varlık yok, v2 uygulanmamış
    app.db
        .collection::<Document>("assets")
        .delete_many(doc! { "household_id": hid })
        .await
        .unwrap();
    app.db
        .collection::<Document>("schema_migrations")
        .delete_one(doc! { "_id": 2 })
        .await
        .unwrap();
    assert!(assets(&app, &s).await.is_empty());

    kakeibo::db::migrations::run(&app.db).await.unwrap();
    assert_eq!(assets(&app, &s).await.len(), 8);
    // Tekrar çalışsa da çift kayıt yok
    app.db
        .collection::<Document>("schema_migrations")
        .delete_one(doc! { "_id": 2 })
        .await
        .unwrap();
    kakeibo::db::migrations::run(&app.db).await.unwrap();
    assert_eq!(assets(&app, &s).await.len(), 8);
    app.cleanup().await;
}