package placement

import "strings"

// SearchSourceMode mirrors the legacy Next.js search source options per Threads account.
type SearchSourceMode string

const (
	SearchSourceMixed          SearchSourceMode = "mixed"
	SearchSourceThreads        SearchSourceMode = "threads"
	SearchSourceBrave          SearchSourceMode = "brave"
	SearchSourceCrawler        SearchSourceMode = "crawler"
	SearchSourceThreadsBrave   SearchSourceMode = "threads_brave"
	SearchSourceThreadsCrawler SearchSourceMode = "threads_crawler"
	SearchSourceBraveCrawler   SearchSourceMode = "brave_crawler"
)

const DefaultSearchSourceMode = SearchSourceMixed

func ParseSearchSourceMode(raw string) SearchSourceMode {
	switch SearchSourceMode(strings.TrimSpace(raw)) {
	case SearchSourceMixed, SearchSourceThreads, SearchSourceBrave, SearchSourceCrawler,
		SearchSourceThreadsBrave, SearchSourceThreadsCrawler, SearchSourceBraveCrawler:
		return SearchSourceMode(strings.TrimSpace(raw))
	default:
		return DefaultSearchSourceMode
	}
}

func ModeAllowsThreadsAPI(mode SearchSourceMode) bool {
	switch mode {
	case SearchSourceMixed, SearchSourceThreads, SearchSourceThreadsBrave, SearchSourceThreadsCrawler:
		return true
	default:
		return false
	}
}

func ModeAllowsBrave(mode SearchSourceMode) bool {
	switch mode {
	case SearchSourceMixed, SearchSourceBrave, SearchSourceThreadsBrave, SearchSourceBraveCrawler:
		return true
	default:
		return false
	}
}

func ModeAllowsCrawler(mode SearchSourceMode) bool {
	switch mode {
	case SearchSourceMixed, SearchSourceCrawler, SearchSourceThreadsCrawler, SearchSourceBraveCrawler:
		return true
	default:
		return false
	}
}

// MemberNeedsWebSearchKey reports whether placement scan should require a web search API key.
func MemberNeedsWebSearchKey(ctx MemberContext) bool {
	if !ctx.AllowsBrave || ctx.DevMode {
		return false
	}
	switch ctx.SearchSourceMode {
	case SearchSourceBrave, SearchSourceThreadsBrave:
		return true
	case SearchSourceThreads:
		return false
	default:
		return ctx.AllowsBrave
	}
}

// MemberNeedsBraveKey is deprecated; use MemberNeedsWebSearchKey.
func MemberNeedsBraveKey(ctx MemberContext) bool {
	return MemberNeedsWebSearchKey(ctx)
}

// WithoutCrawler returns a mode that never uses Playwright, for formal API-only routing.
func WithoutCrawler(mode SearchSourceMode) SearchSourceMode {
	switch mode {
	case SearchSourceMixed, SearchSourceThreadsCrawler, SearchSourceBraveCrawler:
		return SearchSourceThreadsBrave
	case SearchSourceCrawler:
		return SearchSourceThreads
	default:
		return mode
	}
}