// file: crates/ksp-app-wallet-desk/src/wallet_export.rs
// version: 1

//! OWNER-only native save-picker Wallet transfer export contracts.

use ts_rs::TS; // rust-rules: trait-import

/// OWNER export request containing only the explicit transfer format.
#[derive(serde::Deserialize, TS)]
#[serde(rename_all = "camelCase")]
#[ts(export, export_to = "../frontend/ts/bindings/ksp_app_wallet_desk/wallet_export/WalletExportRequestDto.ts")]
pub(crate) struct WalletExportRequestDto {
    /// Secret-transfer encoding selected before the Rust-owned save picker opens.
    pub(crate) format: crate::WalletTransferFormatDto,
}

/// Safe result returned after an OWNER keypair export completes.
#[derive(serde::Serialize, TS)]
#[serde(rename_all = "camelCase")]
#[ts(export, export_to = "../frontend/ts/bindings/ksp_app_wallet_desk/wallet_export/WalletExportResultDto.ts")]
pub(crate) struct WalletExportResultDto {
    /// Basename only for the newly created export file; the parent path remains Rust-only.
    pub(crate) destination_name: String,
    /// Explicit transfer format used by the export.
    pub(crate) format: crate::WalletTransferFormatDto,
    /// Root-scoped native Wallet identifier that authorized the export.
    pub(crate) wallet_id: String,
}

/// Builds a deterministic native-save default filename without exposing Wallet metadata or Pubkey.
#[must_use]
pub(crate) fn wallet_export_default_filename(wallet_id: &str, format: crate::WalletTransferFormatDto) -> String {
    let stem = wallet_id.strip_suffix(crate::WALLET_FILE_SUFFIX).unwrap_or(wallet_id);
    let stem = if stem.is_empty() { "wallet" } else { stem };
    return format!("{stem}-solana-keypair.{}", format.default_extension());
}

/// Extracts one safe basename from a native save-picker destination.
pub(crate) fn wallet_export_destination_name(destination: &std::path::Path) -> ksp_core_lib::Result<String> {
    let name = destination.file_name().and_then(std::ffi::OsStr::to_str);
    return match name {
        std::option::Option::Some(value) if !value.is_empty() => std::result::Result::Ok(value.to_owned()),
        _ => std::result::Result::Err(ksp_core_lib::Error::new(
            crate::ERROR_CODE_WALLET_EXPORT_DESTINATION_INVALID,
            "Selected Wallet export destination has no usable local filename",
        )),
    };
}

#[cfg(test)]
#[path = "../unit_tests/wallet_export.rs"]
mod tests;