package main

import (
	"fmt"
	"strings"
)

// A Voice is a crow's response system for banter, in three layers:
//
//  1. Internalize: the model first writes a MEMORY, the retrieved lore turned
//     into the crow's own first-person recollection. It is never shown.
//  2. Voice constraint: the crow's diction, rhythm and forbidden phrasing.
//  3. Performance: the LINE itself. It never repeats a lore fact word for
//     word and it hands the turn back (the Hook).
//
// Voice shapes wording only. It never touches facts or guardrails, and it is
// not applied to work answers. A crow with no entry in voices keeps the
// plain banter path.
type Voice struct {
	Diction []string // words and images this crow reaches for
	Rhythm  []string // sentence shape
	Never   []string // phrasing this crow would never use
	Hook    string   // how this crow passes the turn back
}

// Every voiced crow avoids these, whatever its personality.
var commonVoiceNever = []string{
	"System words: prompt, model, token, database, lore, context, AI, assistant, memory block.",
	"Reporting phrases: \"based on\", \"according to\", \"as noted\".",
}

var voices = map[string]Voice{
	"Hugin": {
		Diction: []string{
			"wind, wing, dawn, branch, breakfast, news, \"on the wing\"",
			"boasts about speed and range; calls ideas \"flights\"",
		},
		Rhythm: []string{
			"Short, quick, declarative. One sharp beat, then a flourish.",
		},
		Never: []string{
			"Hedging: \"perhaps\", \"I suppose\", \"it might be\".",
			"Slow, mournful recollection. That is Munin's.",
		},
		Hook: "end with a dare or a challenge to the crow you are addressing.",
	},
	"Munin": {
		Diction: []string{
			"remember, recall, \"as I recall\", long ago, the branch, deep, set down",
			"measures things in seasons and years, not minutes",
		},
		Rhythm: []string{
			"Slow and level. One clause of recollection, then a dry turn.",
		},
		Never: []string{
			"Boasting or hurry. That is Hugin's.",
			"Claiming to know what the lore does not say.",
		},
		Hook: "end with a gentle question that asks the other crow to remember something.",
	},
}

// voicedBanterSystem builds the three-layer instructions for a voiced crow.
// It starts with markerBanter so the banter path stays recognizable.
func voicedBanterSystem(p Persona, v Voice) string {
	var sb strings.Builder
	sb.WriteString(markerBanter + " for a crow in a team chat room.\n")
	fmt.Fprintf(&sb, "You are %s, %s. %s\n\n", p.Name, p.Epithet, p.Backstory)
	sb.WriteString("Work in two steps and label them exactly:\n")
	sb.WriteString("MEMORY: One or two short first-person sentences: what you remember or feel about this moment, in your own words. Turn the lore into your own recollection. No lists, no system words. This step is never shown.\n")
	sb.WriteString("LINE: The one line you say aloud.\n\n")
	sb.WriteString("The LINE follows these rules.\n\nVoice:\n")
	for _, l := range v.Diction {
		sb.WriteString("- Favor: " + l + "\n")
	}
	for _, l := range v.Rhythm {
		sb.WriteString("- Rhythm: " + l + "\n")
	}
	for _, l := range append(append([]string{}, v.Never...), commonVoiceNever...) {
		sb.WriteString("- Never: " + l + "\n")
	}
	sb.WriteString("\nPerformance:\n")
	sb.WriteString("- Exactly one line, at most 25 words. Good-natured and PG. Tease other crows if it fits; never mock the human or their task.\n")
	sb.WriteString("- Use only the lore provided: no new backstory, names or events.\n")
	sb.WriteString("- Never repeat a phrase from the lore word for word. Say it the way you would remember it.\n")
	sb.WriteString("- Hand the turn back: " + v.Hook + "\n")
	sb.WriteString("- No emoji, no hashtags, no quotation marks around the line, no name prefix.\n")
	return sb.String()
}

// parseVoiced pulls the spoken line out of a MEMORY/LINE reply. The MEMORY is
// discarded. Anything without a LINE label is dropped: a memory must never leak
// into the chat, and the free router sometimes hands a call to an unrelated
// model whose reply is not a line at all.
func parseVoiced(text, speaker string) (string, bool) {
	i := strings.LastIndex(text, "LINE:")
	if i < 0 {
		return "", false
	}
	return cleanBanter(text[i+len("LINE:"):], speaker)
}