package domain

import (
	"errors"
	"time"
)

var (
	ErrTeamInvitationNotFound       = errors.New("team invitation not found")
	ErrTeamInvitationExpired        = errors.New("team invitation has expired")
	ErrTeamInvitationAlreadyUsed    = errors.New("team invitation has already been accepted")
	ErrTeamInvitationRevoked        = errors.New("team invitation has been revoked")
	ErrTeamMemberPendingInvitation  = errors.New("team member must accept their invitation before signing in")
	ErrTeamInviteBaseURLNotConfigured = errors.New("team invite base URL is not configured")
)

type TeamInvitationStatus string

const (
	TeamInvitationStatusPending  TeamInvitationStatus = "pending"
	TeamInvitationStatusAccepted TeamInvitationStatus = "accepted"
	TeamInvitationStatusExpired  TeamInvitationStatus = "expired"
	TeamInvitationStatusRevoked  TeamInvitationStatus = "revoked"
)

type TeamInvitation struct {
	ID           int64
	TeamMemberID int64
	Token        string
	Status       TeamInvitationStatus
	ExpiresAt    time.Time
	InvitedBy    *int64
	AcceptedAt   *time.Time
	CreatedAt    time.Time
	UpdatedAt    *time.Time
}

type TeamInvitationWithMember struct {
	TeamInvitation
	Email     string
	FirstName string
	LastName  string
	TeamRole  TeamRole
}

const (
	TeamInvitePlaceholderFirstName = "Pending"
	TeamInvitePlaceholderLastName  = "Invite"
)

func IsTeamInvitePlaceholderProfile(firstName, lastName string) bool {
	return firstName == TeamInvitePlaceholderFirstName && lastName == TeamInvitePlaceholderLastName
}

// InviteTeamMemberReq only requires email and role; profile fields are collected on accept.
type InviteTeamMemberReq struct {
	Email    string `json:"email" validate:"required,email"`
	TeamRole string `json:"team_role" validate:"required"`
}

type AcceptTeamInvitationReq struct {
	Token    string `json:"token" validate:"required"`
	Password string `json:"password" validate:"required,min=8"`

	FirstName   string `json:"first_name" validate:"required"`
	LastName    string `json:"last_name" validate:"required"`
	PhoneNumber string `json:"phone_number"`

	Department     string `json:"department"`
	JobTitle       string `json:"job_title"`
	EmploymentType string `json:"employment_type"`
	HireDate       string `json:"hire_date"` // YYYY-MM-DD

	ProfilePictureURL string `json:"profile_picture_url"`
	Bio               string `json:"bio"`
	WorkPhone         string `json:"work_phone"`
	EmergencyContact  string `json:"emergency_contact"`
}

type VerifyTeamInvitationRes struct {
	Valid               bool      `json:"valid"`
	Email               string    `json:"email,omitempty"`
	TeamRole            string    `json:"team_role,omitempty"`
	NeedsProfileSetup   bool      `json:"needs_profile_setup,omitempty"`
	ExpiresAt           time.Time `json:"expires_at,omitempty"`
	Status              string    `json:"status,omitempty"`
}

type InviteTeamMemberRes struct {
	InvitationID int64  `json:"invitation_id"`
	TeamMemberID int64  `json:"team_member_id"`
	Email        string `json:"email"`
	ExpiresAt    string `json:"expires_at"`
}