package models

import (
	"encoding/json"
	"time"
)

// User represents a system user (SuperAdmin, CompanyAdmin, Recruiter, or JobSeeker)
type User struct {
	ID           string `json:"id" db:"id"`
	Identifier   string `json:"identifier" db:"identifier"`
	PasswordHash string `json:"-" db:"password_hash"` // Never expose password hash in JSON
	Role         string `json:"role" db:"role"`       // superadmin, admin, recruiter, candidate

	// Personal Info
	FullName  string  `json:"fullName" db:"full_name"`
	Phone     *string `json:"phone,omitempty" db:"phone"`
	LineID    *string `json:"lineId,omitempty" db:"line_id"`
	WhatsApp  *string `json:"whatsapp,omitempty" db:"whatsapp"`
	Instagram *string `json:"instagram,omitempty" db:"instagram"`

	// Candidate Profile Info
	BirthDate *time.Time `json:"birthDate,omitempty" db:"birth_date"`
	Address   *string    `json:"address,omitempty" db:"address"`
	City      *string    `json:"city,omitempty" db:"city"`
	State     *string    `json:"state,omitempty" db:"state"`
	ZipCode   *string    `json:"zipCode,omitempty" db:"zip_code"`
	Objective *string    `json:"objective,omitempty" db:"objective"`
	Title     *string    `json:"title,omitempty" db:"title"`
	AvatarURL *string    `json:"avatarUrl,omitempty" db:"avatar_url"`

	// Profile (JSONB fields)
	Bio               *string `json:"bio,omitempty" db:"bio"`
	ProfilePictureURL *string `json:"profilePictureUrl,omitempty" db:"profile_picture_url"`
	Skills            []byte  `json:"skills,omitempty" db:"skills"`         // JSONB
	Experience        []byte  `json:"experience,omitempty" db:"experience"` // JSONB
	Education         []byte  `json:"education,omitempty" db:"education"`   // JSONB

	// Settings
	Language string `json:"language" db:"language"` // pt, en, es, ja
	Active   bool   `json:"active" db:"active"`

	// Metadata
	CreatedAt   time.Time  `json:"createdAt" db:"created_at"`
	UpdatedAt   time.Time  `json:"updatedAt" db:"updated_at"`
	LastLoginAt *time.Time `json:"lastLoginAt,omitempty" db:"last_login_at"`
}

// UserResponse is the public representation of a user (without sensitive data)
type UserResponse struct {
	ID                string     `json:"id"`
	Identifier        string     `json:"identifier"`
	Role              string     `json:"role"`
	FullName          string     `json:"fullName"`
	Phone             *string    `json:"phone,omitempty"`
	LineID            *string    `json:"lineId,omitempty"`
	WhatsApp          *string    `json:"whatsapp,omitempty"`
	Instagram         *string    `json:"instagram,omitempty"`
	Language          string     `json:"language"`
	Active            bool       `json:"active"`
	CreatedAt         time.Time  `json:"createdAt"`
	LastLoginAt       *time.Time `json:"lastLoginAt,omitempty"`
	Bio               *string    `json:"bio,omitempty"`
	ProfilePictureURL *string    `json:"profilePictureUrl,omitempty"`
	Skills            []string   `json:"skills,omitempty"`
	Experience        []any      `json:"experience,omitempty"`
	Education         []any      `json:"education,omitempty"`
}

// ToResponse converts User to UserResponse
func (u *User) ToResponse() UserResponse {
	// Helper to unmarshal JSONB
	var skills []string
	if len(u.Skills) > 0 {
		_ = json.Unmarshal(u.Skills, &skills)
	}
	var experience []any
	if len(u.Experience) > 0 {
		_ = json.Unmarshal(u.Experience, &experience)
	}
	var education []any
	if len(u.Education) > 0 {
		_ = json.Unmarshal(u.Education, &education)
	}

	return UserResponse{
		ID:                u.ID,
		Identifier:        u.Identifier,
		Role:              u.Role,
		FullName:          u.FullName,
		Phone:             u.Phone,
		LineID:            u.LineID,
		WhatsApp:          u.WhatsApp,
		Instagram:         u.Instagram,
		Language:          u.Language,
		Active:            u.Active,
		CreatedAt:         u.CreatedAt,
		LastLoginAt:       u.LastLoginAt,
		Bio:               u.Bio,
		ProfilePictureURL: u.ProfilePictureURL,
		Skills:            skills,
		Experience:        experience,
		Education:         education,
	}
}