package wallet

import (
	"context"
	"errors"
)

var (
	ErrDependencyUnavailable = errors.New("dependency unavailable")
	ErrInvalidAmount         = errors.New("invalid amount")
	ErrInsufficientBalance   = errors.New("insufficient balance")
	ErrFeaturePending        = errors.New("feature pending")
)

type Service struct {
	repo *Repository
}

func NewService(repo *Repository) *Service {
	return &Service{repo: repo}
}

func (s *Service) Account(ctx context.Context, userID uint64) (*AccountDTO, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	return s.repo.Account(ctx, userID)
}

func (s *Service) Ledger(ctx context.Context, userID uint64, page, pageSize int) (*PaginatedResult, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	return s.repo.Ledger(ctx, userID, page, pageSize)
}

func (s *Service) Withdraw(ctx context.Context, userID uint64, req WithdrawRequest) (*AccountDTO, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	// 提现功能已迁移到 withdrawal 模块
	// 用户应通过 /api/withdrawals 接口提交提现申请
	return nil, ErrFeaturePending
}

func (s *Service) AdminLedger(ctx context.Context, query AdminLedgerQuery) (*PaginatedResult, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	return s.repo.AdminLedger(ctx, query)
}
