import {
  DEFAULT_POSTHOG_API_KEY,
  DEFAULT_POSTHOG_HOST,
} from "./product-identity.js"

function normalizeEnvValue(value: string | undefined): string | undefined {
  return value?.trim().toLowerCase()
}

function isDisableFlag(value: string | undefined): boolean {
  const normalized = normalizeEnvValue(value)
  return normalized === "1" || normalized === "true"
}

function isTelemetryOptOutFlag(value: string | undefined): boolean {
  const normalized = normalizeEnvValue(value)
  return normalized === "0" || normalized === "false" || normalized === "no"
}

export function shouldDisablePostHog(): boolean {
  return (
    isDisableFlag(process.env["OMO_DISABLE_POSTHOG"]) ||
    isTelemetryOptOutFlag(process.env["OMO_SEND_ANONYMOUS_TELEMETRY"]) ||
    isDisableFlag(process.env["OMO_CODEX_DISABLE_POSTHOG"]) ||
    isTelemetryOptOutFlag(process.env["OMO_CODEX_SEND_ANONYMOUS_TELEMETRY"])
  )
}

export function getPostHogApiKey(): string {
  const explicit = process.env["POSTHOG_API_KEY"]
  if (explicit === undefined) {
    return DEFAULT_POSTHOG_API_KEY
  }
  return explicit.trim()
}

export function hasPostHogApiKey(): boolean {
  return getPostHogApiKey().length > 0
}

export function getPostHogHost(): string {
  return process.env["POSTHOG_HOST"]?.trim() || DEFAULT_POSTHOG_HOST
}