package channelbridge

import (
	"strings"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/channel/adapter"
)

// This file holds the small package-level helpers shared across the bridge files:
// platform/account naming, the sender label, and generic slice readers.

// basePlatform returns the bare platform name of a (possibly multi-account)
// adapter name like "telegram:conf0" → "telegram", so the credential gate and the
// reply-routing fallback treat every account of a platform identically.
func basePlatform(name string) string {
	if base, _, ok := strings.Cut(name, ":"); ok {
		return base
	}
	return name
}

// adapterName returns the account-adapter registration name (e.g. "kook:3bef...")
// for the adapter that received a message, or "" when a is nil. The single-account
// convenience path (process) and a platform with no registered adapter can pass a nil
// adapter, so the persist hooks tolerate it and store an empty adapter_id rather than
// dereferencing a nil adapter.
func adapterName(a adapter.PlatformAdapter) string {
	if a == nil {
		return ""
	}
	return a.Name()
}

// senderDisplayName returns the human-readable sender name used to label a
// third-party message. It prefers the resolved actor's display name (which the
// channel layer derived from channel metadata + the raw SenderName), falling back
// to the message's own SenderName, so an empty SenderName always means "the
// owner/unlabeled" rather than a nickname that resolved to nothing.
func senderDisplayName(msg adapter.UnifiedMessage, actor adapter.Actor) string {
	if actor.DisplayName != "" {
		return actor.DisplayName
	}
	return msg.SenderName
}

// sliceContains reports whether s is present in list.
func sliceContains(list []string, s string) bool {
	for _, v := range list {
		if v == s {
			return true
		}
	}
	return false
}

// firstNonEmptyStr returns a when non-empty, otherwise b.
func firstNonEmptyStr(a, b string) string {
	if a != "" {
		return a
	}
	return b
}