// EZConfig - Community-maintained API rate limits and concurrency settings
//
// Usage:
//   import ezconfig
//
//   case ezconfig.get_config("api.openai.com") {
//     Some(config) -> {
//       // Use config.rps and config.max_concurrent
//     }
//     None -> {
//       // Use default values
//     }
//   }

import gleam/dict.{type Dict}
import gleam/option.{type Option}

/// API rate limit configuration
pub type ApiConfig {
  ApiConfig(
    rps: Int,
    // Requests per second
    max_concurrent: Int,
    // Maximum concurrent requests
    notes: String,
  )
}

/// Community-maintained API configurations
/// Update this dict and publish a new version to add/modify APIs
fn api_configs() -> Dict(String, ApiConfig) {
  dict.from_list([
    #(
      "api.openai.com",
      ApiConfig(60, 10, "Tier 1: 60 req/min = 1 req/sec, but bursts allowed"),
    ),
    #(
      "api.anthropic.com",
      ApiConfig(50, 5, "Claude API rate limits"),
    ),
    #(
      "api.stripe.com",
      ApiConfig(
        100,
        20,
        "Stripe has high rate limits, can handle concurrent requests well",
      ),
    ),
    #(
      "api.github.com",
      ApiConfig(
        10,
        3,
        "GitHub API: 5000 req/hour = ~1.4 req/sec, be conservative",
      ),
    ),
    #(
      "api.twitter.com",
      ApiConfig(15, 5, "Twitter API v2 rate limits vary by endpoint"),
    ),
    #(
      "graph.facebook.com",
      ApiConfig(200, 10, "Facebook Graph API has high limits"),
    ),
    #(
      "www.googleapis.com",
      ApiConfig(10, 5, "Google APIs vary widely, this is conservative default"),
    ),
    #(
      "slack.com",
      ApiConfig(1, 1, "Slack webhooks: 1 req/sec tier limit"),
    ),
    #(
      "discord.com",
      ApiConfig(50, 10, "Discord API has generous rate limits"),
    ),
    #(
      "api.sendgrid.com",
      ApiConfig(10, 5, "SendGrid email API"),
    ),
    #(
      "api.twilio.com",
      ApiConfig(20, 5, "Twilio messaging API"),
    ),
    #(
      "api.hubspot.com",
      ApiConfig(10, 3, "HubSpot CRM API: 100 req/10sec = 10 req/sec"),
    ),
    #(
      "api.notion.com",
      ApiConfig(3, 2, "Notion API: 3 req/sec rate limit"),
    ),
    #(
      "api.airtable.com",
      ApiConfig(5, 2, "Airtable API: 5 req/sec rate limit"),
    ),
    #(
      "shopify.com",
      ApiConfig(2, 2, "Shopify REST API: 2 req/sec (burst 40)"),
    ),
  ])
}

/// Get configuration for a specific API domain
pub fn get_config(domain: String) -> Option(ApiConfig) {
  dict.get(api_configs(), domain) |> option.from_result
}

/// Get RPS for a domain, or None if not configured
pub fn get_rps(domain: String) -> Option(Int) {
  case get_config(domain) {
    option.Some(config) -> option.Some(config.rps)
    option.None -> option.None
  }
}

/// Get max_concurrent for a domain, or None if not configured
pub fn get_max_concurrent(domain: String) -> Option(Int) {
  case get_config(domain) {
    option.Some(config) -> option.Some(config.max_concurrent)
    option.None -> option.None
  }
}

/// Get all configured domains
pub fn list_domains() -> List(String) {
  dict.keys(api_configs())
}

/// Check if a domain has a configuration
pub fn has_config(domain: String) -> Bool {
  case get_config(domain) {
    option.Some(_) -> True
    option.None -> False
  }
}