package processing

import (
	"context"
	"encoding/json"

	"github.com/google/uuid"
)

// loadEnabledStandardFields returns enabled standard_fields for fill-missing.
func (p *Pipeline) loadEnabledStandardFields(ctx context.Context, companyID uuid.UUID) ([]StandardFieldDef, error) {
	if p == nil || p.Pool == nil {
		return nil, nil
	}
	rows, err := p.Pool.Query(ctx, `
		SELECT key, COALESCE(default_value, ''), COALESCE(unit, ''), COALESCE(mapping_hints, '[]'::jsonb)
		FROM standard_fields
		WHERE company_id = $1 AND enabled = true
		ORDER BY sort_order ASC, key ASC`, companyID)
	if err != nil {
		// Table / columns may be absent in older local DBs — treat as no defs.
		return nil, nil
	}
	defer rows.Close()

	out := make([]StandardFieldDef, 0)
	for rows.Next() {
		var key, defVal, unit string
		var hintsRaw []byte
		if err := rows.Scan(&key, &defVal, &unit, &hintsRaw); err != nil {
			return nil, err
		}
		var hints any
		_ = json.Unmarshal(hintsRaw, &hints)
		out = append(out, StandardFieldDef{
			Key:          key,
			DefaultValue: defVal,
			Unit:         unit,
			MappingHints: parseHints(hints),
		})
	}
	return out, rows.Err()
}