use semver::Version;
use serde::{Deserialize, Serialize};
use std::borrow::Cow;
use std::sync::LazyLock;
use time::OffsetDateTime;

// the usage of X- has been deprecated for quite along time, it turns out
pub(crate) static ATUIN_HEADER_VERSION: &str = "Atuin-Version";
pub(crate) static ATUIN_CARGO_VERSION: &str = env!("CARGO_PKG_VERSION");

pub(crate) static ATUIN_VERSION: LazyLock<Version> =
    LazyLock::new(|| Version::parse(ATUIN_CARGO_VERSION).expect("failed to parse self semver"));

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct UserResponse {
    pub(crate) username: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct RegisterRequest {
    pub(crate) email: String,
    pub(crate) username: String,
    pub(crate) password: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct RegisterResponse {
    pub(crate) session: String,
    /// Auth type: "hub" for Hub API tokens, "cli" for legacy CLI session tokens.
    /// Old servers that don't return this field will deserialize as None.
    #[serde(default)]
    pub(crate) auth: Option<String>,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct DeleteUserResponse {}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct ChangePasswordRequest {
    pub(crate) current_password: String,
    pub(crate) new_password: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct ChangePasswordResponse {}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct LoginRequest {
    pub(crate) username: String,
    pub(crate) password: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct LoginResponse {
    pub(crate) session: String,
    /// Auth type: "hub" for Hub API tokens, "cli" for legacy CLI session tokens.
    /// Old servers that don't return this field will deserialize as None.
    #[serde(default)]
    pub(crate) auth: Option<String>,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct AddHistoryRequest {
    pub(crate) id: String,
    #[serde(with = "time::serde::rfc3339")]
    pub(crate) timestamp: OffsetDateTime,
    pub(crate) data: String,
    pub(crate) hostname: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct CountResponse {
    pub(crate) count: i64,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct SyncHistoryRequest {
    #[serde(with = "time::serde::rfc3339")]
    pub(crate) sync_ts: OffsetDateTime,
    #[serde(with = "time::serde::rfc3339")]
    pub(crate) history_ts: OffsetDateTime,
    pub(crate) host: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct SyncHistoryResponse {
    pub(crate) history: Vec<String>,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct ErrorResponse<'a> {
    pub(crate) reason: Cow<'a, str>,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct IndexResponse {
    pub(crate) homage: String,
    pub(crate) version: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct StatusResponse {
    pub(crate) count: i64,
    pub(crate) username: String,
    pub(crate) deleted: Vec<String>,

    // These could/should also go on the index of the server
    // However, we do not request the server index as a part of normal sync
    // I'd rather slightly increase the size of this response, than add an extra HTTP request
    pub(crate) page_size: i64, // max page size supported by the server
    pub(crate) version: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct DeleteHistoryRequest {
    pub(crate) client_id: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct MessageResponse {
    pub(crate) message: String,
}

#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct MeResponse {
    pub(crate) username: String,
}

// Hub CLI authentication types

/// Response from POST /auth/cli/code - generates a code for CLI auth
#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct CliCodeResponse {
    pub(crate) code: String,
}

/// Response from GET /auth/cli/verify?code=<code> - polls for authorization
#[derive(Debug, Serialize, Deserialize)]
pub(crate) struct CliVerifyResponse {
    /// Session token, present only when authorization is complete
    pub(crate) token: Option<String>,
    pub(crate) success: Option<bool>,
    pub(crate) error: Option<String>,
}