// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

import { normalizeFields } from '../../utils/normalize.ts'

export interface PostHogConfig {
  apiKey?: string | null
  host?: string
  defaultListLimit?: number
}

export interface PostHogConfigResolved {
  apiKey: string | null
  baseUrl: string
  defaultListLimit: number
}

export function normalizePostHogConfig(input: Record<string, unknown>): PostHogConfig {
  return normalizeFields(input) as unknown as PostHogConfig
}

function hostToUrl(host: string | undefined): string {
  if (host === undefined || host === 'us') return 'https://us.posthog.com'
  if (host === 'eu') return 'https://eu.posthog.com'
  if (host.startsWith('http')) return host.replace(/\/+$/, '')
  return `https://${host}`
}

export function resolvePostHogConfig(config: PostHogConfig = {}): PostHogConfigResolved {
  return {
    apiKey: config.apiKey ?? null,
    baseUrl: hostToUrl(config.host),
    defaultListLimit: config.defaultListLimit ?? 100,
  }
}
