package artifactmodel

import "strings"

const (
	SourceTranscriptBase         = "narratio.transcript.base"
	SourceTranscriptPolished     = "narratio.transcript.polished"
	SourceTranscriptFinal        = "narratio.transcript.final"
	SourceTranscriptFinalTrimmed = "narratio.transcript.final_trimmed"
)

const (
	TranscriptPathBase         = "transcripts/base.json"
	TranscriptPathPolished     = "transcripts/polished.json"
	TranscriptPathFinal        = "transcripts/final.json"
	TranscriptPathFinalTrimmed = "transcripts/final.trimmed.json"
)

const (
	TranscriptOutputKindBase         = "transcript_base"
	TranscriptOutputKindPolished     = "transcript_polished"
	TranscriptOutputKindFinal        = "transcript_final"
	TranscriptOutputKindFinalTrimmed = "transcript_final_trimmed"
)

// TranscriptArtifactSpec describes one built-in transcript artifact mapping.
type TranscriptArtifactSpec struct {
	SourceID         string
	CanonicalRelPath string
	ProducerStage    string
	OutputKind       string
}

var runtimeTranscriptArtifacts = []TranscriptArtifactSpec{
	{
		SourceID:         SourceTranscriptBase,
		CanonicalRelPath: TranscriptPathBase,
		ProducerStage:    "merge",
		OutputKind:       TranscriptOutputKindBase,
	},
	{
		SourceID:         SourceTranscriptPolished,
		CanonicalRelPath: TranscriptPathPolished,
		ProducerStage:    "polish",
		OutputKind:       TranscriptOutputKindPolished,
	},
	{
		SourceID:         SourceTranscriptFinal,
		CanonicalRelPath: TranscriptPathFinal,
		ProducerStage:    "normalize",
		OutputKind:       TranscriptOutputKindFinal,
	},
	{
		SourceID:         SourceTranscriptFinalTrimmed,
		CanonicalRelPath: TranscriptPathFinalTrimmed,
		ProducerStage:    "trim",
		OutputKind:       TranscriptOutputKindFinalTrimmed,
	},
}

// RuntimeTranscriptArtifacts returns transcript mappings in pipeline order.
func RuntimeTranscriptArtifacts() []TranscriptArtifactSpec {
	return cloneTranscriptSpecs(runtimeTranscriptArtifacts)
}

// LookupRuntimeTranscriptArtifact returns runtime transcript metadata by source ID.
func LookupRuntimeTranscriptArtifact(sourceID string) (TranscriptArtifactSpec, bool) {
	trimmed := strings.TrimSpace(sourceID)
	for _, spec := range runtimeTranscriptArtifacts {
		if spec.SourceID == trimmed {
			return spec, true
		}
	}
	return TranscriptArtifactSpec{}, false
}

func cloneTranscriptSpecs(specs []TranscriptArtifactSpec) []TranscriptArtifactSpec {
	if len(specs) == 0 {
		return nil
	}
	out := make([]TranscriptArtifactSpec, len(specs))
	copy(out, specs)
	return out
}