use axum::Extension;
use axum::extract::{FromRef, Json, Path, Query, State};
use erp_core::error::AppError;
use erp_core::rbac::require_permission;
use erp_core::types::{ApiResponse, TenantContext};
use uuid::Uuid;

use crate::dto::shift_dto::*;
use crate::service::shift_service;
use crate::state::HealthState;

#[derive(Debug, serde::Deserialize)]
pub struct PaginationParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
}

// ---------------------------------------------------------------------------
// Shift
// ---------------------------------------------------------------------------

pub async fn list_shifts<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<ListShiftsParams>,
) -> Result<Json<ApiResponse<erp_core::types::PaginatedResponse<ShiftResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.list")?;
    let result = shift_service::list_shifts(&state, ctx.tenant_id, &params).await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn get_shift<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
) -> Result<Json<ApiResponse<ShiftResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.list")?;
    let result = shift_service::get_shift(&state, ctx.tenant_id, shift_id).await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn create_shift<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(mut body): Json<CreateShiftReq>,
) -> Result<Json<ApiResponse<ShiftResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    body.sanitize();
    let result =
        shift_service::create_shift(&state, ctx.tenant_id, Some(ctx.user_id), body).await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn update_shift<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
    Json(body): Json<UpdateShiftWithVersion>,
) -> Result<Json<ApiResponse<ShiftResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    let result =
        shift_service::update_shift(&state, ctx.tenant_id, shift_id, Some(ctx.user_id), body)
            .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn delete_shift<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
    Query(params): Query<crate::dto::DeleteWithVersion>,
) -> Result<Json<ApiResponse<()>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    shift_service::delete_shift(
        &state,
        ctx.tenant_id,
        shift_id,
        Some(ctx.user_id),
        params.version,
    )
    .await?;
    Ok(Json(ApiResponse::ok(())))
}

// ---------------------------------------------------------------------------
// PatientAssignment
// ---------------------------------------------------------------------------

pub async fn list_assignments<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
    Query(params): Query<PaginationParams>,
) -> Result<Json<ApiResponse<erp_core::types::PaginatedResponse<PatientAssignmentResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.list")?;
    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);
    let result =
        shift_service::list_assignments(&state, ctx.tenant_id, shift_id, page, page_size).await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn create_assignment<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
    Json(mut body): Json<CreatePatientAssignmentReq>,
) -> Result<Json<ApiResponse<PatientAssignmentResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    body.sanitize();
    let result =
        shift_service::create_assignment(&state, ctx.tenant_id, shift_id, Some(ctx.user_id), body)
            .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn batch_assign<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(shift_id): Path<Uuid>,
    Json(body): Json<BatchAssignReq>,
) -> Result<Json<ApiResponse<Vec<PatientAssignmentResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    let result =
        shift_service::batch_assign(&state, ctx.tenant_id, shift_id, Some(ctx.user_id), body)
            .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn update_assignment<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path((shift_id, assignment_id)): Path<(Uuid, Uuid)>,
    Json(body): Json<UpdatePatientAssignmentWithVersion>,
) -> Result<Json<ApiResponse<PatientAssignmentResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    let result = shift_service::update_assignment(
        &state,
        ctx.tenant_id,
        shift_id,
        assignment_id,
        Some(ctx.user_id),
        body,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn delete_assignment<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path((shift_id, assignment_id)): Path<(Uuid, Uuid)>,
    Query(params): Query<crate::dto::DeleteWithVersion>,
) -> Result<Json<ApiResponse<()>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.manage")?;
    shift_service::delete_assignment(
        &state,
        ctx.tenant_id,
        shift_id,
        assignment_id,
        Some(ctx.user_id),
        params.version,
    )
    .await?;
    Ok(Json(ApiResponse::ok(())))
}

// ---------------------------------------------------------------------------
// HandoffLog
// ---------------------------------------------------------------------------

pub async fn list_handoffs<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<ListHandoffParams>,
) -> Result<Json<ApiResponse<erp_core::types::PaginatedResponse<HandoffLogResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.shifts.list")?;
    let result = shift_service::list_handoffs(&state, ctx.tenant_id, &params).await?;
    Ok(Json(ApiResponse::ok(result)))
}

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