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::follow_up_dto::*;
use crate::dto::DeleteWithVersion;
use crate::service::follow_up_service;
use crate::state::HealthState;

// ---------------------------------------------------------------------------
// 批量操作 Handler
// ---------------------------------------------------------------------------

pub async fn batch_create_tasks<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<BatchCreateTasksReq>,
) -> Result<Json<ApiResponse<BatchResultResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    if req.patient_ids.is_empty() {
        return Err(AppError::Validation("patient_ids 不能为空".to_string()));
    }
    if req.patient_ids.len() > 100 {
        return Err(AppError::Validation("单次批量最多 100 条".to_string()));
    }
    let result = follow_up_service::batch_create_tasks(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn batch_assign_tasks<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<BatchAssignReq>,
) -> Result<Json<ApiResponse<BatchResultResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    if req.task_ids.is_empty() {
        return Err(AppError::Validation("task_ids 不能为空".to_string()));
    }
    if req.task_ids.len() > 100 {
        return Err(AppError::Validation("单次批量最多 100 条".to_string()));
    }
    let result = follow_up_service::batch_assign_tasks(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn batch_complete_tasks<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<BatchCompleteReq>,
) -> Result<Json<ApiResponse<BatchResultResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    if req.task_ids.is_empty() {
        return Err(AppError::Validation("task_ids 不能为空".to_string()));
    }
    if req.task_ids.len() > 100 {
        return Err(AppError::Validation("单次批量最多 100 条".to_string()));
    }
    let result = follow_up_service::batch_complete_tasks(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct FollowUpTaskListParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
    pub patient_id: Option<Uuid>,
    pub assigned_to: Option<Uuid>,
    pub status: Option<String>,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct FollowUpRecordListParams {
    pub page: Option<u64>,
    pub page_size: Option<u64>,
    pub task_id: Option<Uuid>,
    pub patient_id: Option<Uuid>,
}

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

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

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

pub async fn create_task<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Json(req): Json<CreateFollowUpTaskReq>,
) -> Result<Json<ApiResponse<FollowUpTaskResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    let mut req = req;
    req.sanitize();
    let result = follow_up_service::create_task(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

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

pub async fn delete_task<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(id): Path<Uuid>,
    Json(req): Json<DeleteWithVersion>,
) -> Result<Json<ApiResponse<()>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    follow_up_service::delete_task(&state, ctx.tenant_id, id, Some(ctx.user_id), req.version).await?;
    Ok(Json(ApiResponse::ok(())))
}

pub async fn create_record<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Path(task_id): Path<Uuid>,
    Json(req): Json<CreateFollowUpRecordReq>,
) -> Result<Json<ApiResponse<FollowUpRecordResp>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.manage")?;
    if req.task_id != task_id {
        return Err(AppError::Validation("路径中的 task_id 与请求体不一致".to_string()));
    }
    let mut req = req;
    req.sanitize();
    let result = follow_up_service::create_record(
        &state, ctx.tenant_id, Some(ctx.user_id), req,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}

pub async fn list_records<S>(
    State(state): State<HealthState>,
    Extension(ctx): Extension<TenantContext>,
    Query(params): Query<FollowUpRecordListParams>,
) -> Result<Json<ApiResponse<PaginatedResponse<FollowUpRecordResp>>>, AppError>
where
    HealthState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    require_permission(&ctx, "health.follow-up.list")?;
    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);
    let result = follow_up_service::list_records(
        &state, ctx.tenant_id, page, page_size, params.task_id, params.patient_id,
    )
    .await?;
    Ok(Json(ApiResponse::ok(result)))
}