use std::ops::Deref;

use cashu_js::{
    nuts::{
        nut02::{JsId, JsKeySet, JsKeySetsResponse, JsKeysResponse, JsMintKeySet},
        nut04::{JsMintRequest, JsPostMintResponse},
    },
    types::JsAmount,
};
use cashu_sdk::{mint::Mint, nuts::nut01, nuts::nut02::KeySet};
use wasm_bindgen::prelude::*;

use crate::error::{into_err, Result};

#[wasm_bindgen(js_name = Mint)]
pub struct JsMint {
    inner: Mint,
}

impl Deref for JsMint {
    type Target = Mint;
    fn deref(&self) -> &Self::Target {
        &self.inner
    }
}

impl From<Mint> for JsMint {
    fn from(inner: Mint) -> JsMint {
        JsMint { inner }
    }
}

#[wasm_bindgen(js_class = Mint)]
impl JsMint {
    #[wasm_bindgen(constructor)]
    pub fn new(
        secret: String,
        derivation_path: String,
        inactive_keyset: JsValue,
        spent_secrets: JsValue,
        max_order: u8,
        min_fee_reserve: JsAmount,
        percent_fee_reserve: f32,
    ) -> Result<JsMint> {
        let inactive_keyset = serde_wasm_bindgen::from_value(inactive_keyset).map_err(into_err)?;
        let spent_secrets = serde_wasm_bindgen::from_value(spent_secrets).map_err(into_err)?;
        Ok(JsMint {
            inner: Mint::new(
                &secret,
                &derivation_path,
                inactive_keyset,
                spent_secrets,
                max_order,
                *min_fee_reserve.deref(),
                percent_fee_reserve,
            ),
        })
    }

    /// Get Active Keyset Pubkeys
    #[wasm_bindgen(getter)]
    pub fn active_keyset_pubkeys(&self) -> Result<JsKeysResponse> {
        let keyset: KeySet = self.inner.active_keyset.clone().into();

        Ok(nut01::Response { keys: keyset.keys }.into())
    }

    /// Get Keysets
    #[wasm_bindgen(js_name = KeySets)]
    pub fn keysets(&self) -> JsKeySetsResponse {
        self.inner.keysets().into()
    }

    /// Get Active Keyset
    #[wasm_bindgen(getter)]
    pub fn active_keyset(&self) -> JsMintKeySet {
        self.inner.active_keyset.clone().into()
    }

    /// Keyset
    #[wasm_bindgen(js_name = KeySet)]
    pub fn keyset(&self, id: JsId) -> Option<JsKeySet> {
        self.inner.keyset(id.deref()).map(|ks| ks.into())
    }

    /// Process Mint Request
    #[wasm_bindgen(js_name = ProcessMintRequest)]
    pub fn process_mint_request(
        &mut self,
        mint_request: JsMintRequest,
    ) -> Result<JsPostMintResponse> {
        Ok(self
            .inner
            .process_mint_request(mint_request.deref().clone())
            .map_err(into_err)?
            .into())
    }
}