// Copyright (c) Tribufu. All Rights Reserved.

use serde::{Deserialize, Serialize};

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2ResponseType {
    Code,
    Token,
}

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2ClientType {
    Confidential,
    Public,
}

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2TokenHintType {
    AccessToken,
    RefreshToken,
}

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2GrantType {
    AuthorizationCode,
    ClientCredentials,
    DeviceCode,
    Passkey,
    Password,
    RefreshToken,
}

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2AuthorizeError {
    AccessDenied,
    InvalidRequest,
    InvalidScope,
    ServerError,
    TemporarilyUnavailable,
    UnauthorizedClient,
    UnsupportedResponseType,
}

#[derive(Debug, Copy, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum OAuth2TokenType {
    Bearer,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2AuthorizeRequest {
    pub response_type: OAuth2ResponseType,
    pub client_id: String,
    pub client_secret: Option<String>,
    pub redirect_uri: String,
    pub scope: Option<String>,
    pub state: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2CodeResponse {
    pub code: String,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub state: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2ErrorResponse {
    pub error: OAuth2AuthorizeError,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub error_description: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub error_uri: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub state: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2TokenRequest {
    pub grant_type: OAuth2GrantType,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub code: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub refresh_token: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub username: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub password: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub passkey: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub client_id: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub client_secret: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub redirect_uri: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2TokenResponse {
    pub token_type: OAuth2TokenType,

    pub access_token: String,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub refresh_token: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub scope: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub state: Option<String>,

    pub expires_in: u64,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2RevokeRequest {
    pub token: String,
    pub token_type_hint: OAuth2TokenHintType,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct OAuth2IntrospectionResponse {
    pub active: bool,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub client_id: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub username: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub scope: Option<String>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub exp: Option<i64>,
}

impl OAuth2IntrospectionResponse {
    pub fn inative() -> Self {
        Self {
            active: false,
            client_id: None,
            username: None,
            scope: None,
            exp: None,
        }
    }
}