package auth

import (
	"context"
	"encoding/json"
	"net/http"

	"pipu/api/internal/api/gen"
)

func (h *Handler) ExportUsers(ctx context.Context, _ gen.ExportUsersRequestObject) (gen.ExportUsersResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	users, err := h.svc.ExportUsers(ctx, p)
	if err != nil {
		return nil, err
	}
	archive := gen.UserArchive{Version: 1, Users: make([]gen.UserArchiveEntry, 0, len(users))}
	for _, u := range users {
		archive.Users = append(archive.Users, gen.UserArchiveEntry{
			Username: u.Username, DisplayName: u.DisplayName, PasswordHash: u.PasswordHash, Role: gen.Role(u.Role),
			IsBlocked: u.IsBlocked, MustChangePassword: u.MustChangePassword, MustChangeCredentials: u.MustChangeCredentials,
			ReviewsUploads: u.ReviewsUploads, ManagesUpdates: u.ManagesUpdates,
		})
	}
	return archiveResponse{archive}, nil
}

type archiveResponse struct{ gen.UserArchive }

func (r archiveResponse) VisitExportUsersResponse(w http.ResponseWriter) error {
	w.Header().Set("Content-Type", "application/json")
	w.Header().Set("Content-Disposition", `attachment; filename="pipu-users.json"`)
	w.Header().Set("Cache-Control", "no-store")
	return json.NewEncoder(w).Encode(r.UserArchive)
}

func (h *Handler) ImportUsers(ctx context.Context, req gen.ImportUsersRequestObject) (gen.ImportUsersResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	if req.Body == nil {
		return nil, archiveInvalid()
	}
	entries := make([]ArchivedUser, 0, len(req.Body.Users))
	for _, u := range req.Body.Users {
		entries = append(entries, ArchivedUser{
			Username: u.Username, DisplayName: u.DisplayName, PasswordHash: u.PasswordHash, Role: Role(u.Role),
			IsBlocked: u.IsBlocked, MustChangePassword: u.MustChangePassword, MustChangeCredentials: u.MustChangeCredentials,
			ReviewsUploads: u.ReviewsUploads, ManagesUpdates: u.ManagesUpdates,
		})
	}
	created, skipped, err := h.svc.ImportUsers(ctx, p, int(req.Body.Version), entries)
	if err != nil {
		return nil, err
	}
	return gen.ImportUsers200JSONResponse{Created: created, Skipped: skipped}, nil
}