package logic

import (
	"context"
	"strconv"
	"strings"

	userentity "spark-server/internal/module/user/entity"
	"spark-server/internal/pkg/errs"
)

func (s *Service) ListUsers(ctx context.Context, email string, page, size int) (list []UserView, total int64, err error) {
	if !s.ready() {
		return nil, 0, ErrNotReady
	}
	if size <= 0 || size > 200 {
		size = 50
	}
	if page < 0 {
		page = 0
	}
	rows, total, err := s.repo.ListUsers(ctx, email, page, size)
	if err != nil {
		return nil, 0, err
	}
	list = make([]UserView, 0, len(rows))
	for i := range rows {
		list = append(list, userView(&rows[i]))
	}
	return list, total, nil
}

func (s *Service) UserByEmail(ctx context.Context, email string) (map[string]any, error) {
	email = strings.ToLower(strings.TrimSpace(email))
	if email == "" {
		return nil, errs.ErrInvalidArgument
	}
	if !s.ready() {
		return nil, ErrNotReady
	}
	rows, err := s.repo.UsersByEmail(ctx, email)
	if err != nil {
		return nil, err
	}
	items := make([]UserView, 0, len(rows))
	for i := range rows {
		items = append(items, userView(&rows[i]))
	}
	return map[string]any{
		"email": email, "appUsers": items, "appCode": "spark",
	}, nil
}

func (s *Service) UserByID(ctx context.Context, id int64) (*UserView, error) {
	if !s.ready() {
		return nil, ErrNotReady
	}
	r, err := s.repo.UserByID(ctx, id)
	if err != nil {
		return nil, err
	}
	v := userView(r)
	return &v, nil
}

func (s *Service) UsersByNickname(ctx context.Context, nickname string) ([]UserView, error) {
	if !s.ready() {
		return nil, ErrNotReady
	}
	rows, err := s.repo.UsersByNickname(ctx, nickname)
	if err != nil {
		return nil, err
	}
	out := make([]UserView, 0, len(rows))
	for i := range rows {
		out = append(out, userView(&rows[i]))
	}
	return out, nil
}

func (s *Service) UsersByDevice(ctx context.Context, deviceID string) ([]UserView, error) {
	if !s.ready() {
		return nil, ErrNotReady
	}
	deviceID = strings.TrimSpace(deviceID)
	did, _ := strconv.ParseUint(deviceID, 10, 64)
	rows, err := s.repo.UsersByDevice(ctx, deviceID, did)
	if err != nil {
		return nil, err
	}
	out := make([]UserView, 0, len(rows))
	for i := range rows {
		out = append(out, userView(&rows[i]))
	}
	return out, nil
}

func (s *Service) UsersByIP(ctx context.Context, ip string) ([]UserView, error) {
	if !s.ready() {
		return nil, ErrNotReady
	}
	rows, err := s.repo.UsersByIP(ctx, strings.TrimSpace(ip))
	if err != nil {
		return nil, err
	}
	out := make([]UserView, 0, len(rows))
	for i := range rows {
		out = append(out, userView(&rows[i]))
	}
	return out, nil
}

func (s *Service) BanByEmail(ctx context.Context, email string, banned bool) error {
	email = strings.ToLower(strings.TrimSpace(email))
	if email == "" {
		return errs.ErrInvalidArgument
	}
	if !s.ready() {
		return ErrNotReady
	}
	status := userentity.StatusActive
	if banned {
		status = userentity.StatusDisabled
	}
	return s.repo.SetUserStatusByEmail(ctx, email, status)
}

func (s *Service) ResetNicknameByEmail(ctx context.Context, email, nickname string) error {
	email = strings.ToLower(strings.TrimSpace(email))
	if email == "" {
		return errs.ErrInvalidArgument
	}
	if strings.TrimSpace(nickname) == "" {
		nickname = "用户"
	}
	if !s.ready() {
		return ErrNotReady
	}
	return s.repo.SetNicknameByEmail(ctx, email, nickname)
}

func (s *Service) ResetAvatarByEmail(ctx context.Context, email string) error {
	email = strings.ToLower(strings.TrimSpace(email))
	if email == "" {
		return errs.ErrInvalidArgument
	}
	if !s.ready() {
		return ErrNotReady
	}
	return s.repo.ClearAvatarByEmail(ctx, email)
}

func (s *Service) SameIPRank(ctx context.Context, limit int) ([]SameIPItem, error) {
	if !s.ready() {
		return nil, ErrNotReady
	}
	if limit <= 0 || limit > 200 {
		limit = 50
	}
	rows, err := s.repo.SameIPRank(ctx, limit)
	if err != nil {
		return nil, err
	}
	out := make([]SameIPItem, 0, len(rows))
	for i := range rows {
		out = append(out, SameIPItem{
			IP: rows[i].IP, UserCount: rows[i].UserCount, DeviceCount: rows[i].DeviceCount, Count: rows[i].UserCount,
		})
	}
	return out, nil
}