package router

import (
	_ "embed"
	"encoding/json"
	"fmt"
	"sort"
)

// The task vocabulary lives in task_phrases.json, not in Go source. See the
// comment block inside that file for what each list means and why the entries
// that are NOT in it were left out.
//
// go:embed, so the single-binary deploy is unchanged: the JSON is compiled into
// mavend and there is nothing to install beside it. Parsed once at init; a
// malformed asset panics at startup rather than silently disabling task capture,
// which would look like the feature quietly not working.

//go:embed task_phrases.json
var taskPhrasesJSON []byte

type urgencyMarker struct {
	Word   string `json:"word"`
	Weight int    `json:"weight"`
}

type taskPhrases struct {
	CapturePrefixes   []string        `json:"capture_prefixes"`
	UrgencyMarkers    []urgencyMarker `json:"urgency_markers"`
	ListNouns         []string        `json:"list_nouns"`
	ListShortcutNouns []string        `json:"list_shortcut_nouns"`
}

var (
	taskCapturePrefixes   []string
	urgencyMarkers        []urgencyMarker
	taskListWords         []string
	taskListWordsShortcut []string
)

func init() {
	var v taskPhrases
	if err := json.Unmarshal(taskPhrasesJSON, &v); err != nil {
		panic(fmt.Sprintf("router: task_phrases.json: %v", err))
	}
	if len(v.CapturePrefixes) == 0 || len(v.ListNouns) == 0 {
		panic("router: task_phrases.json: capture_prefixes and list_nouns must be non-empty")
	}
	// Strongest urgency first, so stripUrgency finds "срочно" before "важно"
	// in an utterance carrying both. The file is written in that order already;
	// sorting here means a careless edit cannot silently downgrade a task.
	sort.SliceStable(v.UrgencyMarkers, func(i, j int) bool {
		return v.UrgencyMarkers[i].Weight > v.UrgencyMarkers[j].Weight
	})
	taskCapturePrefixes = v.CapturePrefixes
	urgencyMarkers = v.UrgencyMarkers
	taskListWords = v.ListNouns
	taskListWordsShortcut = v.ListShortcutNouns
}