package dto

import (
	"time"

	"tyapi-server/internal/domains/user/entities"
)

// CreateUserRequest 创建用户请求
type CreateUserRequest struct {
	Username  string `json:"username" binding:"required,min=3,max=50" example:"john_doe"`
	Email     string `json:"email" binding:"required,email" example:"john@example.com"`
	Password  string `json:"password" binding:"required,min=6,max=128" example:"password123"`
	FirstName string `json:"first_name" binding:"max=50" example:"John"`
	LastName  string `json:"last_name" binding:"max=50" example:"Doe"`
	Phone     string `json:"phone" binding:"omitempty,max=20" example:"+86-13800138000"`
}

// UpdateUserRequest 更新用户请求
type UpdateUserRequest struct {
	FirstName *string `json:"first_name,omitempty" binding:"omitempty,max=50" example:"John"`
	LastName  *string `json:"last_name,omitempty" binding:"omitempty,max=50" example:"Doe"`
	Phone     *string `json:"phone,omitempty" binding:"omitempty,max=20" example:"+86-13800138000"`
	Avatar    *string `json:"avatar,omitempty" binding:"omitempty,url" example:"https://example.com/avatar.jpg"`
}

// ChangePasswordRequest 修改密码请求
type ChangePasswordRequest struct {
	OldPassword string `json:"old_password" binding:"required" example:"oldpassword123"`
	NewPassword string `json:"new_password" binding:"required,min=6,max=128" example:"newpassword123"`
}

// UserResponse 用户响应
type UserResponse struct {
	ID          string               `json:"id" example:"123e4567-e89b-12d3-a456-426614174000"`
	Username    string               `json:"username" example:"john_doe"`
	Email       string               `json:"email" example:"john@example.com"`
	FirstName   string               `json:"first_name" example:"John"`
	LastName    string               `json:"last_name" example:"Doe"`
	Phone       string               `json:"phone" example:"+86-13800138000"`
	Avatar      string               `json:"avatar" example:"https://example.com/avatar.jpg"`
	Status      entities.UserStatus  `json:"status" example:"active"`
	LastLoginAt *time.Time           `json:"last_login_at,omitempty" example:"2024-01-01T00:00:00Z"`
	CreatedAt   time.Time            `json:"created_at" example:"2024-01-01T00:00:00Z"`
	UpdatedAt   time.Time            `json:"updated_at" example:"2024-01-01T00:00:00Z"`
	Profile     *UserProfileResponse `json:"profile,omitempty"`
}

// UserProfileResponse 用户档案响应
type UserProfileResponse struct {
	Bio      string     `json:"bio,omitempty" example:"Software Developer"`
	Location string     `json:"location,omitempty" example:"Beijing, China"`
	Website  string     `json:"website,omitempty" example:"https://johndoe.com"`
	Birthday *time.Time `json:"birthday,omitempty" example:"1990-01-01T00:00:00Z"`
	Gender   string     `json:"gender,omitempty" example:"male"`
	Timezone string     `json:"timezone,omitempty" example:"Asia/Shanghai"`
	Language string     `json:"language,omitempty" example:"zh-CN"`
}

// UserListRequest 用户列表请求
type UserListRequest struct {
	Page     int                    `form:"page" binding:"omitempty,min=1" example:"1"`
	PageSize int                    `form:"page_size" binding:"omitempty,min=1,max=100" example:"20"`
	Sort     string                 `form:"sort" binding:"omitempty,oneof=created_at updated_at username email" example:"created_at"`
	Order    string                 `form:"order" binding:"omitempty,oneof=asc desc" example:"desc"`
	Status   entities.UserStatus    `form:"status" binding:"omitempty,oneof=active inactive suspended pending" example:"active"`
	Search   string                 `form:"search" binding:"omitempty,max=100" example:"john"`
	Filters  map[string]interface{} `form:"-"`
}

// UserListResponse 用户列表响应
type UserListResponse struct {
	Users      []*UserResponse `json:"users"`
	Pagination PaginationMeta  `json:"pagination"`
}

// PaginationMeta 分页元数据
type PaginationMeta struct {
	Page       int   `json:"page" example:"1"`
	PageSize   int   `json:"page_size" example:"20"`
	Total      int64 `json:"total" example:"100"`
	TotalPages int   `json:"total_pages" example:"5"`
	HasNext    bool  `json:"has_next" example:"true"`
	HasPrev    bool  `json:"has_prev" example:"false"`
}

// LoginRequest 登录请求
type LoginRequest struct {
	Login    string `json:"login" binding:"required" example:"john_doe"`
	Password string `json:"password" binding:"required" example:"password123"`
}

// LoginResponse 登录响应
type LoginResponse struct {
	User        *UserResponse `json:"user"`
	AccessToken string        `json:"access_token" example:"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."`
	TokenType   string        `json:"token_type" example:"Bearer"`
	ExpiresIn   int64         `json:"expires_in" example:"86400"`
}

// UpdateProfileRequest 更新用户档案请求
type UpdateProfileRequest struct {
	Bio      *string    `json:"bio,omitempty" binding:"omitempty,max=500" example:"Software Developer"`
	Location *string    `json:"location,omitempty" binding:"omitempty,max=100" example:"Beijing, China"`
	Website  *string    `json:"website,omitempty" binding:"omitempty,url" example:"https://johndoe.com"`
	Birthday *time.Time `json:"birthday,omitempty" example:"1990-01-01T00:00:00Z"`
	Gender   *string    `json:"gender,omitempty" binding:"omitempty,oneof=male female other" example:"male"`
	Timezone *string    `json:"timezone,omitempty" binding:"omitempty,max=50" example:"Asia/Shanghai"`
	Language *string    `json:"language,omitempty" binding:"omitempty,max=10" example:"zh-CN"`
}

// UserStatsResponse 用户统计响应
type UserStatsResponse struct {
	TotalUsers     int64 `json:"total_users" example:"1000"`
	ActiveUsers    int64 `json:"active_users" example:"950"`
	InactiveUsers  int64 `json:"inactive_users" example:"30"`
	SuspendedUsers int64 `json:"suspended_users" example:"20"`
	NewUsersToday  int64 `json:"new_users_today" example:"5"`
	NewUsersWeek   int64 `json:"new_users_week" example:"25"`
	NewUsersMonth  int64 `json:"new_users_month" example:"120"`
}

// UserSearchRequest 用户搜索请求
type UserSearchRequest struct {
	Query    string `form:"q" binding:"required,min=1,max=100" example:"john"`
	Page     int    `form:"page" binding:"omitempty,min=1" example:"1"`
	PageSize int    `form:"page_size" binding:"omitempty,min=1,max=50" example:"10"`
}

// 转换方法
func (r *CreateUserRequest) ToEntity() *entities.User {
	return &entities.User{
		Username:  r.Username,
		Email:     r.Email,
		Password:  r.Password,
		FirstName: r.FirstName,
		LastName:  r.LastName,
		Phone:     r.Phone,
		Status:    entities.UserStatusActive,
	}
}

func FromEntity(user *entities.User) *UserResponse {
	if user == nil {
		return nil
	}

	return &UserResponse{
		ID:          user.ID,
		Username:    user.Username,
		Email:       user.Email,
		FirstName:   user.FirstName,
		LastName:    user.LastName,
		Phone:       user.Phone,
		Avatar:      user.Avatar,
		Status:      user.Status,
		LastLoginAt: user.LastLoginAt,
		CreatedAt:   user.CreatedAt,
		UpdatedAt:   user.UpdatedAt,
	}
}

func FromEntities(users []*entities.User) []*UserResponse {
	if users == nil {
		return []*UserResponse{}
	}

	responses := make([]*UserResponse, len(users))
	for i, user := range users {
		responses[i] = FromEntity(user)
	}
	return responses
}