package service

import (
	"context"
	"encoding/json"
	"time"

	"kra/internal/biz"
)

type VersionService struct{ uc *biz.VersionUsecase }

func NewVersionService(uc *biz.VersionUsecase) *VersionService { return &VersionService{uc: uc} }
func versionDTO(v *biz.Version) map[string]any {
	return map[string]any{"ID": v.ID, "CreatedAt": v.CreatedAt, "UpdatedAt": v.UpdatedAt, "DeletedAt": nil, "versionName": v.Name, "versionCode": v.Code, "description": v.Description, "versionData": v.Data}
}
func (s *VersionService) Versions(ctx context.Context, page, size int, name, code string) ([]map[string]any, int64, error) {
	items, total, err := s.uc.Repo().ListVersions(ctx, page, size, name, code)
	if err != nil {
		return nil, 0, err
	}
	out := make([]map[string]any, 0, len(items))
	for _, v := range items {
		out = append(out, versionDTO(v))
	}
	return out, total, nil
}
func (s *VersionService) Version(ctx context.Context, id uint) (map[string]any, error) {
	v, err := s.uc.Repo().FindVersion(ctx, id)
	if err != nil {
		return nil, err
	}
	return versionDTO(v), nil
}
func (s *VersionService) VersionData(ctx context.Context, id uint) (string, string, error) {
	v, err := s.uc.Repo().FindVersion(ctx, id)
	if err != nil {
		return "", "", err
	}
	return v.Data, v.Code, nil
}
func (s *VersionService) DeleteVersions(ctx context.Context, ids []uint) error {
	return s.uc.Repo().DeleteVersions(ctx, ids)
}
func (s *VersionService) Export(ctx context.Context, name, code, description string, menuIDs, apiIDs, dictIDs []uint) error {
	bundle, err := s.uc.Repo().BuildVersionBundle(ctx, menuIDs, apiIDs, dictIDs)
	if err != nil {
		return err
	}
	bundle.Name = name
	bundle.Code = code
	bundle.Description = description
	bundle.ExportTime = time.Now().Format("2006-01-02 15:04:05")
	menus := make([]map[string]any, 0, len(bundle.Menus))
	for _, v := range bundle.Menus {
		menus = append(menus, convertMenu(v))
	}
	apis := make([]map[string]any, 0, len(bundle.APIs))
	for _, v := range bundle.APIs {
		apis = append(apis, apiDTO(v))
	}
	dicts := make([]map[string]any, 0, len(bundle.Dictionaries))
	for _, v := range bundle.Dictionaries {
		dicts = append(dicts, dictionaryDTO(v))
	}
	payload := map[string]any{"version": map[string]any{"name": name, "code": code, "description": description, "exportTime": bundle.ExportTime}, "menus": menus, "apis": apis, "dictionaries": dicts}
	raw, err := json.MarshalIndent(payload, "", "  ")
	if err != nil {
		return err
	}
	return s.uc.Repo().CreateVersion(ctx, &biz.Version{Name: name, Code: code, Description: description, Data: string(raw)})
}
func (s *VersionService) Import(ctx context.Context, bundle *biz.VersionBundle) error {
	return s.uc.Repo().ImportVersionBundle(ctx, bundle)
}