//! Hane ve davet uç noktaları:
//! - `GET    /api/household`              → hane bilgisi + üyeler (tüm üyeler)
//! - `GET    /api/household/invites`      → aktif davetler (yalnızca owner)
//! - `POST   /api/household/invites`      → yeni davet kodu (yalnızca owner)
//! - `DELETE /api/household/invites/{id}` → daveti iptal et (yalnızca owner)

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

use crate::{
    auth::AuthUser,
    db::col,
    error::{AppError, AppResult},
    models::{common::scope, household::Household, invite::Invite, user::Role},
    services::invite,
    state::AppState,
};

#[derive(Serialize, TS)]
#[ts(export, rename = "Household")]
pub struct HouseholdResponse {
    id: String,
    name: String,
    members: Vec<MemberDto>,
}

#[derive(Serialize, TS)]
#[ts(export, rename = "Member")]
struct MemberDto {
    id: String,
    name: String,
    email: String,
    role: Role,
}

#[derive(Serialize, TS)]
#[ts(export, rename = "Invite")]
pub struct InviteDto {
    id: String,
    code: String,
    expires_at: String,
}

impl From<Invite> for InviteDto {
    fn from(i: Invite) -> Self {
        Self {
            id: i.id.to_string(),
            code: i.code,
            expires_at: iso(i.expires_at),
        }
    }
}

/// Üye listesi için okunan alanlar
#[derive(Deserialize)]
struct MemberRow {
    #[serde(rename = "_id")]
    id: Uuid,
    name: String,
    email: String,
    role: Role,
}

pub async fn get(
    State(state): State<AppState>,
    auth: AuthUser,
) -> AppResult<Json<HouseholdResponse>> {
    let hid = auth.household_id;

    let mut hh_filter = scope(hid);
    hh_filter.insert("_id", hid);
    let household = state
        .db
        .collection::<Household>(col::HOUSEHOLDS)
        .find_one(hh_filter)
        .await?
        .ok_or(AppError::NotFound)?;

    let mut cursor = state
        .db
        .collection::<MemberRow>(col::USERS)
        .find(scope(hid))
        .projection(doc! { "name": 1, "email": 1, "role": 1 })
        .sort(doc! { "created_at": 1 })
        .await?;

    let mut members = Vec::new();
    while cursor.advance().await? {
        let m = cursor.deserialize_current()?;
        members.push(MemberDto {
            id: m.id.to_string(),
            name: m.name,
            email: m.email,
            role: m.role,
        });
    }

    Ok(Json(HouseholdResponse {
        id: hid.to_string(),
        name: household.name,
        members,
    }))
}

pub async fn list_invites(
    State(state): State<AppState>,
    auth: AuthUser,
) -> AppResult<Json<Vec<InviteDto>>> {
    auth.require_owner()?;
    let list = invite::list_active(&state.db, auth.household_id).await?;
    Ok(Json(list.into_iter().map(InviteDto::from).collect()))
}

pub async fn create_invite(
    State(state): State<AppState>,
    auth: AuthUser,
) -> AppResult<(StatusCode, Json<InviteDto>)> {
    auth.require_owner()?;
    let inv = invite::create(&state.db, auth.household_id, auth.user_id).await?;
    Ok((StatusCode::CREATED, Json(inv.into())))
}

pub async fn revoke_invite(
    State(state): State<AppState>,
    auth: AuthUser,
    Path(id): Path<String>,
) -> AppResult<StatusCode> {
    auth.require_owner()?;
    let id = Uuid::parse_str(&id).map_err(|_| AppError::NotFound)?;
    invite::revoke(&state.db, auth.household_id, id).await?;
    Ok(StatusCode::NO_CONTENT)
}

fn iso(dt: DateTime) -> String {
    dt.try_to_rfc3339_string().unwrap_or_default()
}