package database

import (
	"time"

	"github.com/golang-jwt/jwt/v4"
	"github.com/oklog/ulid/v2"
)

const InternalApplicationName = "mercury_internal"
const TokenCookieName = "mercury_token"

type Application struct {
	ID   ulid.ULID
	Name string
}

type Token struct {
	ID      ulid.ULID
	AppID   ulid.ULID
	UserID  ulid.ULID
	Scopes  TokenScopes
	Expires time.Time
}

func (t Token) ToClaims() TokenClaims {
	createdAt := ulid.Time(t.ID.Time())

	return TokenClaims{
		TokenID: t.ID,
		UserID:  t.UserID,
		RegisteredClaims: jwt.RegisteredClaims{
			Issuer:    "mercury",
			ExpiresAt: jwt.NewNumericDate(t.Expires),
			IssuedAt:  jwt.NewNumericDate(createdAt),
			NotBefore: jwt.NewNumericDate(createdAt),
		},
	}
}

type TokenClaims struct {
	TokenID ulid.ULID `json:"jti"`
	UserID  ulid.ULID `json:"sub"`
	jwt.RegisteredClaims
}

type TokenScope string

const (
	// All scopes below
	TokenScopeAll          TokenScope = "all"
	TokenScopeAccountsRead TokenScope = "accounts.read"
	// Controls whether tokens have access to sensitive account data, NOT if they can use `/accounts/@me` endpoints.
	TokenScopeAccountsMe    TokenScope = "accounts.me"
	TokenScopeAccountsWrite TokenScope = "accounts.write"
	TokenScopeBlogsRead     TokenScope = "blogs.read"
	TokenScopeBlogsWrite    TokenScope = "blogs.write"
	TokenScopePostsRead     TokenScope = "posts.read"
	TokenScopePostsWrite    TokenScope = "posts.write"
	TokenScopeTimeline      TokenScope = "timeline"
	TokenScopeStreaming     TokenScope = "streaming"
)

func (s TokenScope) IsValid() bool {
	switch s {
	case TokenScopeAccountsRead, TokenScopeAccountsMe,
	TokenScopeAccountsWrite, TokenScopeBlogsRead,
	TokenScopeBlogsWrite, TokenScopePostsRead,
	TokenScopePostsWrite, TokenScopeTimeline,
	TokenScopeStreaming:
		return true
	default:
		return false
	}
}

type TokenScopes []TokenScope

func (s TokenScopes) Has(scope TokenScope) bool {
	for i := range s {
		if s[i] == scope || s[i] == TokenScopeAll {
			return true
		}
	}
	return false
}