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// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the Aleo SDK library.

// The Aleo SDK library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The Aleo SDK library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the Aleo SDK library. If not, see <https://www.gnu.org/licenses/>.

use crate::types::native::{CurrentNetwork, Field, Network};
use snarkvm_console::program::StatePath;
use snarkvm_ledger_query::QueryTrait;

use anyhow::anyhow;
use async_trait::async_trait;
use indexmap::IndexMap;
use serde::{Deserialize, Serialize};
use wasm_bindgen::prelude::wasm_bindgen;

use std::str::FromStr;

/// An offline query object used to insert the global state root and state paths needed to create
/// a valid inclusion proof offline.
#[wasm_bindgen]
#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
pub struct OfflineQuery {
    state_paths: IndexMap<Field<CurrentNetwork>, StatePath<CurrentNetwork>>,
    state_root: <CurrentNetwork as Network>::StateRoot,
}

#[wasm_bindgen]
impl OfflineQuery {
    /// Creates a new offline query object. The state root is required to be passed in as a string
    #[wasm_bindgen(constructor)]
    pub fn new(state_root: &str) -> Result<OfflineQuery, String> {
        let state_root = <CurrentNetwork as Network>::StateRoot::from_str(state_root).map_err(|e| e.to_string())?;
        Ok(Self { state_paths: IndexMap::new(), state_root })
    }

    /// Add a new state path to the offline query object.
    ///
    /// @param {string} commitment: The commitment corresponding to a record inpout
    /// @param {string} state_path: The state path corresponding to the commitment
    #[wasm_bindgen(js_name = "addStatePath")]
    pub fn add_state_path(&mut self, commitment: &str, state_path: &str) -> Result<(), String> {
        let commitment = Field::from_str(commitment).map_err(|e| e.to_string())?;
        let state_path = StatePath::from_str(state_path).map_err(|e| e.to_string())?;
        self.state_paths.insert(commitment, state_path);
        Ok(())
    }

    /// Get a json string representation of the offline query object
    #[wasm_bindgen(js_name = "toString")]
    #[allow(clippy::inherent_to_string)]
    pub fn to_string(&self) -> String {
        serde_json::to_string(&self).unwrap()
    }

    /// Create an offline query object from a json string representation
    #[wasm_bindgen(js_name = "fromString")]
    pub fn from_string(s: &str) -> Result<OfflineQuery, String> {
        serde_json::from_str(s).map_err(|e| e.to_string())
    }
}

#[async_trait(?Send)]
impl QueryTrait<CurrentNetwork> for OfflineQuery {
    fn current_state_root(&self) -> anyhow::Result<<CurrentNetwork as Network>::StateRoot> {
        Ok(self.state_root)
    }

    async fn current_state_root_async(&self) -> anyhow::Result<<CurrentNetwork as Network>::StateRoot> {
        Ok(self.state_root)
    }

    fn get_state_path_for_commitment(
        &self,
        commitment: &Field<CurrentNetwork>,
    ) -> anyhow::Result<StatePath<CurrentNetwork>> {
        self.state_paths.get(commitment).cloned().ok_or(anyhow!("State path not found for commitment"))
    }

    async fn get_state_path_for_commitment_async(
        &self,
        commitment: &Field<CurrentNetwork>,
    ) -> anyhow::Result<StatePath<CurrentNetwork>> {
        self.state_paths.get(commitment).cloned().ok_or(anyhow!("State path not found for commitment"))
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    use crate::RecordPlaintext;

    use wasm_bindgen_test::*;

    const OFFLINE_QUERY: &str =
        r#"{"state_paths":{},"state_root":"sr1wjueje6hy86yw9j4lhl7jwvhjxwunw34paj4k3cn2wm5h5r2syfqd83yw4"}"#;
    const RECORD: &str = "{  owner: aleo1rlwt9w0fl242h40w454m68vttd6vm4lmetu5r57unm5g354y9yzsyexf0y.private,  microcredits: 1000000u64.private,  _nonce: 2899260364216345893364017846447050369739821279831870104066405119445828210771group.public}";
    const RECORD_STATE_PATH: &str = "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";
    const STATE_ROOT: &str = "sr1wjueje6hy86yw9j4lhl7jwvhjxwunw34paj4k3cn2wm5h5r2syfqd83yw4";

    #[wasm_bindgen_test]
    fn test_to_string_and_from_string() {
        let offline_query = OfflineQuery::new(STATE_ROOT).unwrap();
        assert_eq!(offline_query.to_string(), OFFLINE_QUERY);

        let offline_query_from_str = OfflineQuery::from_string(OFFLINE_QUERY).unwrap();
        assert_eq!(offline_query_from_str, offline_query);
    }

    #[wasm_bindgen_test]
    async fn test_state_path_construction() {
        // Create an offline query
        let mut offline_query = OfflineQuery::new(STATE_ROOT).unwrap();

        // Compute the record commitment for the input record
        let record_plaintext = RecordPlaintext::from_string(RECORD).unwrap();
        let record_commitment = record_plaintext.commitment("credits.aleo", "credits").unwrap();

        // Add a valid state path
        offline_query.add_state_path(&record_commitment.to_string(), RECORD_STATE_PATH).unwrap();

        // Construct the expected state path and expected state root
        let expected_state_path = StatePath::<CurrentNetwork>::from_str(RECORD_STATE_PATH).unwrap();
        println!("expected_state_path: {:?}", expected_state_path.global_state_root().to_string());
        let expected_state_root = <CurrentNetwork as Network>::StateRoot::from_str(STATE_ROOT).unwrap();

        // Check that the state path can be retrieved from the query trait
        assert_eq!(
            offline_query.get_state_path_for_commitment(&record_commitment.clone().into()).unwrap(),
            expected_state_path
        );
        assert_eq!(
            offline_query
                .get_state_path_for_commitment_async(&record_commitment.into())
                .await
                .unwrap()
                .global_state_root(),
            expected_state_root
        );

        // Check that the state root can be retrieved from the query trait
        assert_eq!(offline_query.current_state_root().unwrap(), expected_state_root);
        assert_eq!(offline_query.current_state_root_async().await.unwrap(), expected_state_root);
    }
}