use axum::Extension;
use axum::extract::{FromRef, Path, Query, State};
use axum::response::Json;
use uuid::Uuid;

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

use crate::data_dto::{
    AggregateItem, AggregateQueryParams, CountQueryParams, CreatePluginDataReq,
    PluginDataListParams, PluginDataResp, UpdatePluginDataReq,
};
use crate::data_service::{PluginDataService, resolve_manifest_id};
use crate::state::PluginState;

/// 计算插件数据操作所需的权限码
/// 格式：{manifest_id}.{entity}.{action}，如 erp-crm.customer.list
fn compute_permission_code(manifest_id: &str, entity_name: &str, action: &str) -> String {
    let action_suffix = match action {
        "list" | "get" => "list",
        _ => "manage",
    };
    format!("{}.{}.{}", manifest_id, entity_name, action_suffix)
}

#[utoipa::path(
    get,
    path = "/api/v1/plugins/{plugin_id}/{entity}",
    params(PluginDataListParams),
    responses(
        (status = 200, description = "成功", body = ApiResponse<PaginatedResponse<PluginDataResp>>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// GET /api/v1/plugins/{plugin_id}/{entity} — 列表
pub async fn list_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity)): Path<(Uuid, String)>,
    Query(params): Query<PluginDataListParams>,
) -> Result<Json<ApiResponse<PaginatedResponse<PluginDataResp>>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "list");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.list")?;
    }

    let page = params.page.unwrap_or(1);
    let page_size = params.page_size.unwrap_or(20);

    // 解析 filter JSON
    let filter: Option<serde_json::Value> = params
        .filter
        .as_ref()
        .and_then(|f| serde_json::from_str(f).ok());

    let (items, total) = PluginDataService::list(
        plugin_id,
        &entity,
        ctx.tenant_id,
        page,
        page_size,
        &state.db,
        filter,
        params.search,
        params.sort_by,
        params.sort_order,
        &state.entity_cache,
    )
    .await?;

    Ok(Json(ApiResponse::ok(PaginatedResponse {
        data: items,
        total,
        page,
        page_size,
        total_pages: (total as f64 / page_size as f64).ceil() as u64,
    })))
}

#[utoipa::path(
    post,
    path = "/api/v1/plugins/{plugin_id}/{entity}",
    request_body = CreatePluginDataReq,
    responses(
        (status = 200, description = "创建成功", body = ApiResponse<PluginDataResp>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// POST /api/v1/plugins/{plugin_id}/{entity} — 创建
pub async fn create_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity)): Path<(Uuid, String)>,
    Json(req): Json<CreatePluginDataReq>,
) -> Result<Json<ApiResponse<PluginDataResp>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "create");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.admin")?;
    }

    let result = PluginDataService::create(
        plugin_id,
        &entity,
        ctx.tenant_id,
        ctx.user_id,
        req.data,
        &state.db,
        &state.event_bus,
    )
    .await?;

    Ok(Json(ApiResponse::ok(result)))
}

#[utoipa::path(
    get,
    path = "/api/v1/plugins/{plugin_id}/{entity}/{id}",
    responses(
        (status = 200, description = "成功", body = ApiResponse<PluginDataResp>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// GET /api/v1/plugins/{plugin_id}/{entity}/{id} — 详情
pub async fn get_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity, id)): Path<(Uuid, String, Uuid)>,
) -> Result<Json<ApiResponse<PluginDataResp>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "get");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.list")?;
    }

    let result =
        PluginDataService::get_by_id(plugin_id, &entity, id, ctx.tenant_id, &state.db).await?;

    Ok(Json(ApiResponse::ok(result)))
}

#[utoipa::path(
    put,
    path = "/api/v1/plugins/{plugin_id}/{entity}/{id}",
    request_body = UpdatePluginDataReq,
    responses(
        (status = 200, description = "更新成功", body = ApiResponse<PluginDataResp>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// PUT /api/v1/plugins/{plugin_id}/{entity}/{id} — 更新
pub async fn update_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity, id)): Path<(Uuid, String, Uuid)>,
    Json(req): Json<UpdatePluginDataReq>,
) -> Result<Json<ApiResponse<PluginDataResp>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "update");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.admin")?;
    }

    let result = PluginDataService::update(
        plugin_id,
        &entity,
        id,
        ctx.tenant_id,
        ctx.user_id,
        req.data,
        req.version,
        &state.db,
        &state.event_bus,
    )
    .await?;

    Ok(Json(ApiResponse::ok(result)))
}

#[utoipa::path(
    delete,
    path = "/api/v1/plugins/{plugin_id}/{entity}/{id}",
    responses(
        (status = 200, description = "删除成功"),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// DELETE /api/v1/plugins/{plugin_id}/{entity}/{id} — 删除
pub async fn delete_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity, id)): Path<(Uuid, String, Uuid)>,
) -> Result<Json<ApiResponse<()>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "delete");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.admin")?;
    }

    PluginDataService::delete(
        plugin_id,
        &entity,
        id,
        ctx.tenant_id,
        &state.db,
        &state.event_bus,
    )
    .await?;

    Ok(Json(ApiResponse::ok(())))
}

#[utoipa::path(
    get,
    path = "/api/v1/plugins/{plugin_id}/{entity}/count",
    params(CountQueryParams),
    responses(
        (status = 200, description = "成功", body = ApiResponse<u64>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// GET /api/v1/plugins/{plugin_id}/{entity}/count — 统计计数
pub async fn count_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity)): Path<(Uuid, String)>,
    Query(params): Query<CountQueryParams>,
) -> Result<Json<ApiResponse<u64>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "list");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.list")?;
    }

    // 解析 filter JSON
    let filter: Option<serde_json::Value> = params
        .filter
        .as_ref()
        .and_then(|f| serde_json::from_str(f).ok());

    let total = PluginDataService::count(
        plugin_id,
        &entity,
        ctx.tenant_id,
        &state.db,
        filter,
        params.search,
    )
    .await?;

    Ok(Json(ApiResponse::ok(total)))
}

#[utoipa::path(
    get,
    path = "/api/v1/plugins/{plugin_id}/{entity}/aggregate",
    params(AggregateQueryParams),
    responses(
        (status = 200, description = "成功", body = ApiResponse<Vec<AggregateItem>>),
    ),
    security(("bearer_auth" = [])),
    tag = "插件数据"
)]
/// GET /api/v1/plugins/{plugin_id}/{entity}/aggregate — 聚合查询
pub async fn aggregate_plugin_data<S>(
    State(state): State<PluginState>,
    Extension(ctx): Extension<TenantContext>,
    Path((plugin_id, entity)): Path<(Uuid, String)>,
    Query(params): Query<AggregateQueryParams>,
) -> Result<Json<ApiResponse<Vec<AggregateItem>>>, AppError>
where
    PluginState: FromRef<S>,
    S: Clone + Send + Sync + 'static,
{
    let manifest_id = resolve_manifest_id(plugin_id, ctx.tenant_id, &state.db).await?;
    let fine_perm = compute_permission_code(&manifest_id, &entity, "list");
    if require_permission(&ctx, &fine_perm).is_err() {
        require_permission(&ctx, "plugin.list")?;
    }

    // 解析 filter JSON
    let filter: Option<serde_json::Value> = params
        .filter
        .as_ref()
        .and_then(|f| serde_json::from_str(f).ok());

    let rows = PluginDataService::aggregate(
        plugin_id,
        &entity,
        ctx.tenant_id,
        &state.db,
        &params.group_by,
        filter,
    )
    .await?;

    let items = rows
        .into_iter()
        .map(|(key, count)| AggregateItem { key, count })
        .collect();

    Ok(Json(ApiResponse::ok(items)))
}