package usecase

import (
	"app-cloudep-member-server/pkg/domain"
	"app-cloudep-member-server/pkg/domain/entity"
	"app-cloudep-member-server/pkg/domain/member"
	"app-cloudep-member-server/pkg/domain/repository"
	"app-cloudep-member-server/pkg/domain/usecase"
	"context"
	"errors"
	"fmt"

	"code.30cm.net/digimon/library-go/errs"
	"code.30cm.net/digimon/library-go/errs/code"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/mon"
)

// HasPasswordFunc 這樣方便測試
var HasPasswordFunc = HashPassword

func (use *MemberUseCase) CreateUserAccount(ctx context.Context, req usecase.CreateLoginUserRequest) error {
	token := ""
	if req.Platform == member.Digimon {
		var e error
		// 密碼加密
		token, e = HasPasswordFunc(req.Token, use.Config.Bcrypt.Cost)
		if e != nil {
			return errs.NewError(
				code.CloudEPMember,
				code.CatSystem,
				domain.HashPasswordErrorCode,
				fmt.Sprintf("failed to encrypt err: %s", e.Error()),
			)
		}
	}

	err := use.Account.Insert(ctx, &entity.Account{
		LoginID:  req.LoginID,
		Token:    token,
		Platform: req.Platform,
	})
	if err != nil {
		// 錯誤代碼 20-201-02
		e := errs.DatabaseErrorWithScopeL(
			code.CloudEPMember,
			domain.InsertAccountErrorCode,
			logx.WithContext(ctx),
			[]logx.LogField{
				{Key: "req", Value: req},
				{Key: "func", Value: "Account.Insert"},
				{Key: "err", Value: err.Error()},
			},
			"account duplicate").Wrap(err)

		return e
	}

	return nil
}

func (use *MemberUseCase) GetUIDByAccount(ctx context.Context, req usecase.GetUIDByAccountRequest) (usecase.GetUIDByAccountResponse, error) {
	account, err := use.AccountUID.FindUIDByLoginID(ctx, req.Account)
	if err != nil {
		var e *errs.LibError
		switch {
		case errors.Is(err, mon.ErrNotFound):
			e = errs.ResourceNotFoundWithScope(
				code.CloudEPMember,
				domain.FailedFindUIDByLoginIDErrorCode,
				fmt.Sprintf("failed to insert account: %s", req.Account),
			)
		default:
			// 錯誤代碼 20-201-07
			e = errs.DatabaseErrorWithScopeL(
				code.CloudEPMember,
				domain.FailedFindUIDByLoginIDErrorCode,
				logx.WithContext(ctx),
				[]logx.LogField{
					{Key: "req", Value: req},
					{Key: "func", Value: "AccountUID.FindUIDByLoginID"},
					{Key: "err", Value: err.Error()},
				},
				"failed to find account").Wrap(err)
		}

		return usecase.GetUIDByAccountResponse{}, e
	}

	return usecase.GetUIDByAccountResponse{
		UID:     account.UID,
		Account: req.Account,
	}, nil
}

func (use *MemberUseCase) GetUserAccountInfo(ctx context.Context, req usecase.GetUIDByAccountRequest) (usecase.GetAccountInfoResponse, error) {
	account, err := use.Account.FindOneByAccount(ctx, req.Account)
	if err != nil {
		var e *errs.LibError
		switch {
		case errors.Is(err, mon.ErrNotFound):
			// 錯誤代碼 20-301-08
			e = errs.ResourceNotFoundWithScope(
				code.CloudEPMember,
				domain.FailedFindOneByAccountErrorCode,
				fmt.Sprintf("failed to find account: %s", req.Account),
			)
		default:
			// 錯誤代碼 20-201-08
			e = errs.DatabaseErrorWithScopeL(
				code.CloudEPMember,
				domain.FailedFindOneByAccountErrorCode,
				logx.WithContext(ctx),
				[]logx.LogField{
					{Key: "req", Value: req},
					{Key: "func", Value: "Account.FindOneByAccount"},
					{Key: "err", Value: err.Error()},
				},
				"failed to find account").Wrap(err)
		}

		return usecase.GetAccountInfoResponse{}, e
	}

	return usecase.GetAccountInfoResponse{
		Data: usecase.CreateLoginUserRequest{
			LoginID:  account.LoginID,
			Platform: account.Platform,
			Token:    account.Token,
		},
	}, nil
}

// ===========================

func (use *MemberUseCase) GetUserInfo(ctx context.Context, req usecase.GetUserInfoRequest) (usecase.UserInfo, error) {
	var user *entity.User
	var err error

	switch {
	case req.UID != "":
		user, err = use.User.FindOneByUID(ctx, req.UID)
	case req.NickName != "":
		user, err = use.User.FindOneByNickName(ctx, req.NickName)
	default:
		// 驗證至少提供一個查詢參數
		return usecase.UserInfo{}, errs.InvalidFormatWithScope(
			code.CloudEPMember,
			"UID or NickName must be provided",
		)
	}
	// 查詢失敗時處理錯誤
	if err != nil {
		return usecase.UserInfo{}, handleUserQueryError(ctx, err, req)
	}

	// 返回查詢結果
	return mapUserEntityToUserInfo(user), nil
}

// 將查詢錯誤處理邏輯封裝為單獨的函數
func handleUserQueryError(ctx context.Context, err error, req usecase.GetUserInfoRequest) error {
	if errors.Is(err, mon.ErrNotFound) {
		return errs.ResourceNotFoundWithScope(
			code.CloudEPMember,
			domain.FailedToGetUserInfoErrorCode,
			fmt.Sprintf("user not found: %s", req.UID),
		)
	}

	return errs.DatabaseErrorWithScopeL(
		code.CloudEPMember,
		domain.FailedToGetUserInfoErrorCode,
		logx.WithContext(ctx),
		[]logx.LogField{
			{Key: "req", Value: req},
			{Key: "func", Value: "MemberUseCase.GetUserInfo"},
			{Key: "err", Value: err.Error()},
		},
		"failed to query user info").Wrap(err)
}

// 將用戶實體轉換為業務層數據結構
func mapUserEntityToUserInfo(user *entity.User) usecase.UserInfo {
	return usecase.UserInfo{
		CreateUserInfoRequest: usecase.CreateUserInfoRequest{
			UID:               user.UID,
			AlarmCategory:     user.AlarmCategory,
			UserStatus:        user.UserStatus,
			PreferredLanguage: user.PreferredLanguage,
			Currency:          user.Currency,
			Nickname:          user.Nickname,
			AvatarURL:         user.AvatarURL,
			FullName:          user.FullName,
			GenderCode:        user.GenderCode,
			Birthdate:         user.Birthdate,
			PhoneNumber:       user.PhoneNumber,
			Address:           user.Address,
			Email:             user.Email,
		},
		CreateTime: GetOriginalInt64(user.CreateAt),
		UpdateTime: GetOriginalInt64(user.UpdateAt),
	}
}

// ===========================

func (use *MemberUseCase) UpdateUserToken(ctx context.Context, req usecase.UpdateTokenRequest) error {
	// 密碼加密
	token, e := HasPasswordFunc(req.Token, use.Config.Bcrypt.Cost)
	if e != nil {
		return errs.NewError(
			code.CloudEPMember,
			code.CatSystem,
			domain.HashPasswordErrorCode,
			fmt.Sprintf("failed to encrypt err: %s", e.Error()),
		)
	}

	err := use.Account.UpdateTokenByLoginID(ctx, req.Account, token)
	if err != nil {
		var e *errs.LibError
		switch {
		case errors.Is(err, mon.ErrNotFound):
			// 錯誤代碼 20-301-08
			e = errs.ResourceNotFoundWithScope(
				code.CloudEPMember,
				domain.FailedToUpdatePasswordErrorCode,
				fmt.Sprintf("failed to upadte password since account not found: %s", req.Account),
			)
		default:
			// 錯誤代碼 20-201-02
			e = errs.DatabaseErrorWithScopeL(
				code.CloudEPMember,
				domain.FailedToUpdatePasswordErrorCode,
				logx.WithContext(ctx),
				[]logx.LogField{
					{Key: "req", Value: req},
					{Key: "func", Value: "Account.UpdateTokenByLoginID"},
					{Key: "err", Value: err.Error()},
				},
				"failed to update password").Wrap(err)
		}

		return e
	}

	return nil
}

func (use *MemberUseCase) UpdateUserInfo(ctx context.Context, req *usecase.UpdateUserInfoRequest) error {
	err := use.User.UpdateUserDetailsByUID(ctx, &repository.UpdateUserInfoRequest{
		UID:               req.UID,
		AvatarURL:         req.AvatarURL,
		FullName:          req.FullName,
		Nickname:          req.Nickname,
		GenderCode:        req.GenderCode,
		Birthdate:         req.Birthdate,
		Address:           req.Address,
		AlarmCategory:     req.AlarmCategory,
		UserStatus:        req.UserStatus,
		PreferredLanguage: req.PreferredLanguage,
		Currency:          req.Currency,
	})
	if err != nil {
		var e *errs.LibError
		switch {
		case errors.Is(err, mon.ErrNotFound):
			e = errs.ResourceNotFoundWithScope(
				code.CloudEPMember,
				domain.FailedToUpdateUserErrorCode,
				fmt.Sprintf("failed to upadte use info since account not found: %s", req.UID),
			)
		default:
			e = errs.DatabaseErrorWithScopeL(
				code.CloudEPMember,
				domain.FailedToUpdateUserErrorCode,
				logx.WithContext(ctx),
				[]logx.LogField{
					{Key: "req", Value: req},
					{Key: "func", Value: "User.UpdateUserDetailsByUid"},
					{Key: "err", Value: err.Error()},
				},
				"failed to update user info").Wrap(err)
		}

		return e
	}

	return nil
}

func (use *MemberUseCase) UpdateStatus(ctx context.Context, req usecase.UpdateStatusRequest) error {
	err := use.User.UpdateStatus(ctx, req.UID, req.Status.ToInt32())
	if err != nil {
		var e *errs.LibError
		switch {
		case errors.Is(err, mon.ErrNotFound):
			e = errs.ResourceNotFoundWithScope(
				code.CloudEPMember,
				domain.FailedToFindUserErrorCode,
				fmt.Sprintf("failed to upadte use info since account not found: %s", req.UID),
			)

		default:
			e = errs.DatabaseErrorWithScopeL(
				code.CloudEPMember,
				domain.FailedToUpdateUserStatusErrorCode,
				logx.WithContext(ctx),
				[]logx.LogField{
					{Key: "req", Value: req},
					{Key: "func", Value: "User.UpdateStatus"},
					{Key: "err", Value: err.Error()},
				},
				"failed to update user info").Wrap(err)
		}

		return e
	}

	return nil
}

func (use *MemberUseCase) ListMember(ctx context.Context, req usecase.ListUserInfoRequest) (usecase.ListUserInfoResponse, error) {
	listMembers, total, err := use.User.ListMembers(ctx, &repository.UserQueryParams{
		AlarmCategory:   req.AlarmCategory,
		UserStatus:      req.UserStatus,
		CreateStartTime: req.CreateStartTime,
		CreateEndTime:   req.CreateEndTime,
		PageSize:        req.PageSize,
		PageIndex:       req.PageIndex,
	})
	if err != nil {
		e := errs.DatabaseErrorWithScopeL(
			code.CloudEPMember,
			domain.FailedToGetUserInfoErrorCode,
			logx.WithContext(ctx),
			[]logx.LogField{
				{Key: "req", Value: req},
				{Key: "func", Value: "User.ListMembers"},
				{Key: "err", Value: err.Error()},
			},
			"failed to list members").Wrap(err)

		return usecase.ListUserInfoResponse{}, e
	}

	var data = make([]usecase.UserInfo, 0, len(listMembers))

	for _, item := range listMembers {
		data = append(data, usecase.UserInfo{
			CreateUserInfoRequest: usecase.CreateUserInfoRequest{
				UID:               item.UID,
				AlarmCategory:     item.AlarmCategory,
				UserStatus:        item.UserStatus,
				PreferredLanguage: item.PreferredLanguage,
				Currency:          item.Currency,
				Nickname:          item.Nickname,
				AvatarURL:         item.AvatarURL, // 按照先前的命名 AvatarURL
				FullName:          item.FullName,
				GenderCode:        item.GenderCode,
				Birthdate:         item.Birthdate,
				PhoneNumber:       item.PhoneNumber,
				Address:           item.Address,
				Email:             item.Email,
			},
			CreateTime: GetOriginalInt64(item.CreateAt), // 使用自定義指標轉換函數
			UpdateTime: GetOriginalInt64(item.UpdateAt),
		})
	}

	return usecase.ListUserInfoResponse{
		Data: data,
		Page: usecase.Pager{
			Total: total,
			Index: req.PageIndex,
			Size:  req.PageSize,
		},
	}, nil
}

// GetOriginalInt64 取得原始值的函數
func GetOriginalInt64(value *int64) int64 {
	if value == nil {
		return 0 // 處理 nil 的情況
	}

	return *value
}