//go:build ignore

// EXAMPLE — reference shape for AI. Not compiled into apps/api.
package examples

import (
	"context"
	"fmt"
)

type DecodeRepo interface {
	SaveDecode(ctx context.Context, userID string, summary string) error
}

type DecodeServiceImpl struct {
	Repo DecodeRepo
}

func (s *DecodeServiceImpl) Decode(ctx context.Context, in DecodeInput) (*DecodeOutput, error) {
	if in.Year < 1900 || in.Month < 1 || in.Month > 12 || in.Day < 1 || in.Day > 31 {
		return nil, fmt.Errorf("invalid birth date")
	}
	// engine would run here
	summary := "简版结论占位"
	if err := s.Repo.SaveDecode(ctx, "user-from-ctx", summary); err != nil {
		return nil, fmt.Errorf("save decode: %w", err)
	}
	return &DecodeOutput{Summary: summary}, nil
}