llm-cost-ops-api 0.1.0

// API request handlers

use axum::{extract::Query, Json};
use chrono::Utc;
use validator::Validate;

use super::{
    error::{ApiError, ApiResult},
    pagination::{PaginatedResponse, PaginationParams},
    types::*,
    validation::ValidatedJson,
};

// ===== Health Check Handlers =====

/// Health check handler
pub async fn health_check() -> ApiResult<Json<HealthResponse>> {
    Ok(Json(HealthResponse {
        status: HealthStatus::Healthy,
        version: crate::VERSION.to_string(),
        uptime_seconds: 0, // TODO: Implement uptime tracking
        components: vec![
            ComponentHealth {
                name: "api".to_string(),
                status: HealthStatus::Healthy,
                message: None,
            },
        ],
    }))
}

/// Readiness check handler
pub async fn readiness_check() -> ApiResult<Json<HealthResponse>> {
    // TODO: Check database connectivity, etc.
    Ok(Json(HealthResponse {
        status: HealthStatus::Healthy,
        version: crate::VERSION.to_string(),
        uptime_seconds: 0,
        components: vec![],
    }))
}

// ===== Usage Handlers =====

/// Submit usage handler
pub async fn submit_usage(
    ValidatedJson(request): ValidatedJson<SubmitUsageRequest>,
) -> ApiResult<Json<ApiResponse<SubmitUsageResponse>>> {
    // TODO: Implement actual usage submission logic
    let usage_id = uuid::Uuid::new_v4().to_string();

    let response = SubmitUsageResponse {
        usage_id,
        organization_id: request.organization_id,
        estimated_cost: rust_decimal::Decimal::ZERO,
        currency: llm_cost_ops::Currency::USD,
        processed_at: Utc::now(),
    };

    Ok(Json(ApiResponse::new(response)))
}

/// Get usage history handler
pub async fn get_usage_history(
    Query(params): Query<PaginationParams>,
) -> ApiResult<Json<PaginatedResponse<serde_json::Value>>> {
    params.validate().map_err(ApiError::BadRequest)?;

    // TODO: Implement actual usage history retrieval
    let data = vec![];
    let total_items = 0;

    Ok(Json(PaginatedResponse::new(data, &params, total_items)))
}

// ===== Cost Handlers =====

/// Get costs handler
pub async fn get_costs(
    Query(query): Query<GetCostsQuery>,
) -> ApiResult<Json<ApiResponse<CostSummary>>> {
    query.validate()?;

    // TODO: Implement actual cost calculation logic
    let summary = CostSummary {
        total_cost: rust_decimal::Decimal::ZERO,
        currency: llm_cost_ops::Currency::USD,
        total_tokens: 0,
        total_requests: 0,
        period_start: query.start_date.unwrap_or_else(Utc::now),
        period_end: query.end_date.unwrap_or_else(Utc::now),
        breakdown: None,
    };

    Ok(Json(ApiResponse::new(summary)))
}

// ===== Pricing Handlers =====

/// List pricing handler
pub async fn list_pricing(
    Query(params): Query<PaginationParams>,
) -> ApiResult<Json<PaginatedResponse<PricingResponse>>> {
    params.validate().map_err(ApiError::BadRequest)?;

    // TODO: Implement actual pricing retrieval
    let data = vec![];
    let total_items = 0;

    Ok(Json(PaginatedResponse::new(data, &params, total_items)))
}

/// Create pricing handler
pub async fn create_pricing(
    ValidatedJson(request): ValidatedJson<CreatePricingRequest>,
) -> ApiResult<Json<ApiResponse<PricingResponse>>> {
    // TODO: Implement actual pricing creation logic
    let response = PricingResponse {
        id: uuid::Uuid::new_v4().to_string(),
        provider: request.provider,
        model_id: request.model_id,
        input_price_per_1k: request.input_price_per_1k,
        output_price_per_1k: request.output_price_per_1k,
        currency: request.currency,
        effective_date: request.effective_date.unwrap_or_else(Utc::now),
        created_at: Utc::now(),
        updated_at: Utc::now(),
    };

    Ok(Json(ApiResponse::new(response)))
}

/// Get pricing by ID handler
pub async fn get_pricing(_id: String) -> ApiResult<Json<ApiResponse<PricingResponse>>> {
    // TODO: Implement actual pricing retrieval by ID
    Err(ApiError::NotFound("Pricing not found".to_string()))
}

// ===== Analytics Handlers =====

/// Get analytics handler
pub async fn get_analytics(
    Query(query): Query<AnalyticsQuery>,
) -> ApiResult<Json<ApiResponse<AnalyticsResponse>>> {
    query.validate()?;

    // TODO: Implement actual analytics logic
    let response = AnalyticsResponse {
        time_series: vec![],
        summary: AnalyticsSummary {
            total_cost: rust_decimal::Decimal::ZERO,
            total_tokens: 0,
            total_requests: 0,
            average_cost_per_request: rust_decimal::Decimal::ZERO,
            average_tokens_per_request: 0.0,
        },
    };

    Ok(Json(ApiResponse::new(response)))
}

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_health_check() {
        let result = health_check().await;
        assert!(result.is_ok());

        let response = result.unwrap().0;
        assert!(matches!(response.status, HealthStatus::Healthy));
    }

    #[tokio::test]
    async fn test_readiness_check() {
        let result = readiness_check().await;
        assert!(result.is_ok());
    }
}