use axum::Extension;
use axum::extract::{FromRef, Json, Path, Query, State};
use serde::Deserialize;
use utoipa::IntoParams;
use uuid::Uuid;

use erp_core::error::AppError;
use erp_core::rbac::require_permission;
use erp_core::types::{ApiResponse, PaginatedResponse, TenantContext};

use crate::dto::appointment_dto::*;
use crate::service::appointment_service;
use crate::state::HealthState;

#[derive(Debug, Deserialize, IntoParams)]
pub struct AppointmentListParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
    pub status: Option<String>,
    pub patient_id: Option<Uuid>,
    pub doctor_id: Option<Uuid>,
    pub date: Option<chrono::NaiveDate>,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct ScheduleListParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
    pub doctor_id: Option<Uuid>,
    pub date: Option<chrono::NaiveDate>,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct CalendarViewParams {
    pub start_date: chrono::NaiveDate,
    pub end_date: chrono::NaiveDate,
    pub doctor_id: Option<Uuid>,
}

#[derive(Debug, serde::Deserialize, utoipa::ToSchema)]
pub struct UpdateScheduleWithVersion {
    #[serde(flatten)]
    pub data: UpdateScheduleReq,
    pub version: i32,
}

#[derive(Debug, serde::Deserialize, utoipa::ToSchema)]
pub struct UpdateAppointmentStatusWithVersion {
    pub status: String,
    pub cancel_reason: Option<String>,
    pub version: i32,
}

pub async fn list_appointments<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<AppointmentListParams>,
) -> Result<Json<ApiResponse<PaginatedResponse<AppointmentResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.list")?;
    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);
    let result = appointment_service::list_appointments(
        &state, ctx.tenant_id, page, page_size, params.status, params.patient_id,
        params.doctor_id, params.date,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn create_appointment<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<CreateAppointmentReq>,
) -> Result<Json<ApiResponse<AppointmentResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.manage")?;
    let result = appointment_service::create_appointment(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn update_appointment_status<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    Json(req): Json<UpdateAppointmentStatusWithVersion>,
) -> Result<Json<ApiResponse<AppointmentResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.manage")?;
    let update_req = UpdateAppointmentStatusReq {
        status: req.status,
        cancel_reason: req.cancel_reason,
    };
    let result = appointment_service::update_appointment_status(
        &state, ctx.tenant_id, id, Some(ctx.user_id), update_req, req.version,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn list_schedules<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<ScheduleListParams>,
) -> Result<Json<ApiResponse<PaginatedResponse<ScheduleResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.list")?;
    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);
    let result = appointment_service::list_schedules(
        &state, ctx.tenant_id, page, page_size, params.doctor_id, params.date,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn create_schedule<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<CreateScheduleReq>,
) -> Result<Json<ApiResponse<ScheduleResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.manage")?;
    let result = appointment_service::create_schedule(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn update_schedule<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    Json(req): Json<UpdateScheduleWithVersion>,
) -> Result<Json<ApiResponse<ScheduleResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.manage")?;
    let result = appointment_service::update_schedule(
        &state, ctx.tenant_id, id, Some(ctx.user_id), req.data, req.version,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn calendar_view<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<CalendarViewParams>,
) -> Result<Json<ApiResponse<Vec<CalendarDayResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.appointment.list")?;
    let result = appointment_service::calendar_view(
        &state, ctx.tenant_id, params.start_date, params.end_date, params.doctor_id,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}