//! Kategori ve ödeme türü uç noktaları (hanenin tüm üyeleri kullanabilir):
//!
//! | Yöntem | Yol | İş |
//! |---|---|---|
//! | GET   | `/api/categories?include_inactive=true` | listele |
//! | POST  | `/api/categories`                       | ekle |
//! | PATCH | `/api/categories/{id}`                  | ad / emoji / aktiflik değiştir |
//! | PUT   | `/api/categories/order`                 | sırala |
//!
//! `/api/payment-methods` aynı yapıdadır (yalnızca `group` alanı yoktur).

use axum::{
    Json,
    extract::{Path, Query, State},
    http::StatusCode,
};
use mongodb::bson::Uuid;
use serde::{Deserialize, Serialize};
use ts_rs::TS;
use validator::Validate;

use crate::{
    auth::AuthUser,
    error::{AppError, AppResult},
    extract::ValidJson,
    models::group::Group,
    services::catalog::{self, Catalog, Changes, Item},
    state::AppState,
};

// ---------- İstek / yanıt ----------

#[derive(Deserialize, Default)]
pub struct ListQuery {
    #[serde(default)]
    include_inactive: bool,
}

#[derive(Deserialize, Validate, TS)]
#[ts(export, rename = "CatalogCreateRequest", optional_fields)]
pub struct CreateRequest {
    group: Option<Group>,
    #[validate(length(max = 40, message = "Ad en fazla 40 karakter olabilir"))]
    name: String,
    #[validate(length(max = 16, message = "Emoji çok uzun"))]
    emoji: Option<String>,
}

#[derive(Deserialize, Validate, TS)]
#[ts(export, rename = "CatalogUpdateRequest", optional_fields)]
pub struct UpdateRequest {
    #[validate(length(max = 40, message = "Ad en fazla 40 karakter olabilir"))]
    name: Option<String>,
    #[validate(length(max = 16, message = "Emoji çok uzun"))]
    emoji: Option<String>,
    is_active: Option<bool>,
    version: Option<i32>,
}

#[derive(Deserialize, Validate, TS)]
#[ts(export, rename = "CatalogOrderRequest", optional_fields)]
pub struct OrderRequest {
    group: Option<Group>,
    #[validate(length(max = 200, message = "Liste çok uzun"))]
    ids: Vec<String>,
}

#[derive(Serialize, TS)]
#[ts(export, rename = "CatalogItem")]
pub struct ItemDto {
    id: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    #[ts(optional)]
    group: Option<Group>,
    name: String,
    emoji: Option<String>,
    sort_order: i32,
    is_active: bool,
    version: i32,
}

impl From<Item> for ItemDto {
    fn from(i: Item) -> Self {
        Self {
            id: i.id.to_string(),
            group: i.group,
            name: i.name,
            emoji: i.emoji,
            sort_order: i.sort_order,
            is_active: i.is_active,
            version: i.version,
        }
    }
}

fn dtos(items: Vec<Item>) -> Json<Vec<ItemDto>> {
    Json(items.into_iter().map(ItemDto::from).collect())
}

/// URL'deki kimlik bozuksa "bulunamadı" (başka hanenin kaydıyla aynı yanıt).
fn parse_id(id: &str) -> AppResult<Uuid> {
    Uuid::parse_str(id).map_err(|_| AppError::NotFound)
}

// ---------- Ortak işleyiciler ----------

async fn list(
    c: Catalog,
    state: AppState,
    auth: AuthUser,
    q: ListQuery,
) -> AppResult<Json<Vec<ItemDto>>> {
    let items = catalog::list(&state.db, c, auth.household_id, q.include_inactive).await?;
    Ok(dtos(items))
}

async fn create(
    c: Catalog,
    state: AppState,
    auth: AuthUser,
    req: CreateRequest,
) -> AppResult<(StatusCode, Json<ItemDto>)> {
    let item = catalog::create(
        &state.db,
        c,
        auth.household_id,
        req.group,
        req.name,
        req.emoji,
    )
    .await?;
    Ok((StatusCode::CREATED, Json(item.into())))
}

async fn update(
    c: Catalog,
    state: AppState,
    auth: AuthUser,
    id: String,
    req: UpdateRequest,
) -> AppResult<Json<ItemDto>> {
    let changes = Changes {
        name: req.name,
        emoji: req.emoji,
        is_active: req.is_active,
        version: req.version,
    };
    let item = catalog::update(&state.db, c, auth.household_id, parse_id(&id)?, changes).await?;
    Ok(Json(item.into()))
}

async fn reorder(
    c: Catalog,
    state: AppState,
    auth: AuthUser,
    req: OrderRequest,
) -> AppResult<Json<Vec<ItemDto>>> {
    let ids = req
        .ids
        .iter()
        .map(Uuid::parse_str)
        .collect::<Result<Vec<_>, _>>()
        .map_err(|_| AppError::BadRequest("Sıralama listesinde geçersiz kimlik var".into()))?;
    let items = catalog::reorder(&state.db, c, auth.household_id, req.group, ids).await?;
    Ok(dtos(items))
}

// ---------- Kategoriler ----------

pub async fn list_categories(
    State(s): State<AppState>,
    auth: AuthUser,
    Query(q): Query<ListQuery>,
) -> AppResult<Json<Vec<ItemDto>>> {
    list(Catalog::Categories, s, auth, q).await
}

pub async fn create_category(
    State(s): State<AppState>,
    auth: AuthUser,
    ValidJson(req): ValidJson<CreateRequest>,
) -> AppResult<(StatusCode, Json<ItemDto>)> {
    create(Catalog::Categories, s, auth, req).await
}

pub async fn update_category(
    State(s): State<AppState>,
    auth: AuthUser,
    Path(id): Path<String>,
    ValidJson(req): ValidJson<UpdateRequest>,
) -> AppResult<Json<ItemDto>> {
    update(Catalog::Categories, s, auth, id, req).await
}

pub async fn reorder_categories(
    State(s): State<AppState>,
    auth: AuthUser,
    ValidJson(req): ValidJson<OrderRequest>,
) -> AppResult<Json<Vec<ItemDto>>> {
    reorder(Catalog::Categories, s, auth, req).await
}

// ---------- Ödeme türleri ----------

pub async fn list_payment_methods(
    State(s): State<AppState>,
    auth: AuthUser,
    Query(q): Query<ListQuery>,
) -> AppResult<Json<Vec<ItemDto>>> {
    list(Catalog::PaymentMethods, s, auth, q).await
}

pub async fn create_payment_method(
    State(s): State<AppState>,
    auth: AuthUser,
    ValidJson(req): ValidJson<CreateRequest>,
) -> AppResult<(StatusCode, Json<ItemDto>)> {
    create(Catalog::PaymentMethods, s, auth, req).await
}

pub async fn update_payment_method(
    State(s): State<AppState>,
    auth: AuthUser,
    Path(id): Path<String>,
    ValidJson(req): ValidJson<UpdateRequest>,
) -> AppResult<Json<ItemDto>> {
    update(Catalog::PaymentMethods, s, auth, id, req).await
}

pub async fn reorder_payment_methods(
    State(s): State<AppState>,
    auth: AuthUser,
    ValidJson(req): ValidJson<OrderRequest>,
) -> AppResult<Json<Vec<ItemDto>>> {
    reorder(Catalog::PaymentMethods, s, auth, req).await
}