use cosmwasm_std::{to_json_binary, Binary, Deps, DepsMut, Env, MessageInfo, Response, StdResult};
use cw2::set_contract_version;

use crate::counter::{error::*, execute, msg::*, query, state::*};

// version info for migration info
pub const CONTRACT_NAME: &str = "crates.io:counter";
const CONTRACT_VERSION: &str = env!("CARGO_PKG_VERSION");

// ANCHOR: interface_entry
// ANCHOR: entry_point_line
#[cfg_attr(feature = "export", entry_point)]
// ANCHOR_END: entry_point_line
pub fn instantiate(
    deps: DepsMut,
    _env: Env,
    info: MessageInfo,
    msg: InstantiateMsg,
) -> Result<Response, ContractError> {
    let state = State {
        count: msg.count,
        owner: info.sender.clone(),
        cousin: None,
    };
    set_contract_version(deps.storage, CONTRACT_NAME, CONTRACT_VERSION)?;
    STATE.save(deps.storage, &state)?;

    Ok(Response::new()
        .add_attribute("method", "instantiate")
        .add_attribute("owner", info.sender)
        .add_attribute("count", msg.count.to_string()))
}

#[cfg_attr(feature = "export", entry_point)]
pub fn execute(
    deps: DepsMut,
    _env: Env,
    info: MessageInfo,
    msg: ExecuteMsg,
) -> Result<Response, ContractError> {
    match msg {
        ExecuteMsg::Increment {} => execute::increment(deps),
        ExecuteMsg::Reset { count } => execute::reset(deps, info, count),
        ExecuteMsg::SetCousin { cousin } => execute::set_cousin(deps, info, cousin),
    }
}

#[cfg_attr(feature = "export", entry_point)]
pub fn query(deps: Deps, _env: Env, msg: QueryMsg) -> StdResult<Binary> {
    match msg {
        QueryMsg::Count {} => to_json_binary(&query::count(deps)?),
        QueryMsg::CousinCount {} => to_json_binary(&query::cousin_count(deps)?),
        QueryMsg::RawCousinCount {} => to_json_binary(&query::raw_cousin_count(deps)?),
    }
}

// ANCHOR_END: interface_entry

#[cfg(test)]
mod tests {
    use super::*;
    use cosmwasm_std::{
        coins, from_json,
        testing::{mock_dependencies, mock_env, mock_info},
    };

    #[test]
    fn proper_initialization() {
        let mut deps = mock_dependencies();

        let msg = InstantiateMsg { count: 17 };
        let info = mock_info("creator", &coins(1000, "earth"));

        // we can just call .unwrap() to assert this was a success
        let res = instantiate(deps.as_mut(), mock_env(), info, msg).unwrap();
        assert_eq!(0, res.messages.len());

        // it worked, let's query the state
        let res = query(deps.as_ref(), mock_env(), QueryMsg::GetCount {}).unwrap();
        let value: GetCountResponse = from_json(res).unwrap();
        assert_eq!(17, value.count);
    }

    #[test]
    fn increment() {
        let mut deps = mock_dependencies();

        let msg = InstantiateMsg { count: 17 };
        let info = mock_info("creator", &coins(2, "token"));
        let _res = instantiate(deps.as_mut(), mock_env(), info, msg).unwrap();

        // beneficiary can release it
        let info = mock_info("anyone", &coins(2, "token"));
        let msg = ExecuteMsg::Increment {};
        let _res = execute(deps.as_mut(), mock_env(), info, msg).unwrap();

        // should increase counter by 1
        let res = query(deps.as_ref(), mock_env(), QueryMsg::GetCount {}).unwrap();
        let value: GetCountResponse = from_json(res).unwrap();
        assert_eq!(18, value.count);
    }

    #[test]
    fn reset() {
        let mut deps = mock_dependencies();

        let msg = InstantiateMsg { count: 17 };
        let info = mock_info("creator", &coins(2, "token"));
        let _res = instantiate(deps.as_mut(), mock_env(), info, msg).unwrap();

        // beneficiary can release it
        let unauth_info = mock_info("anyone", &coins(2, "token"));
        let msg = ExecuteMsg::Reset { count: 5 };
        let res = execute(deps.as_mut(), mock_env(), unauth_info, msg);
        match res {
            Err(ContractError::Unauthorized {}) => {}
            _ => panic!("Must return unauthorized error"),
        }

        // only the original creator can reset the counter
        let auth_info = mock_info("creator", &coins(2, "token"));
        let msg = ExecuteMsg::Reset { count: 5 };
        let _res = execute(deps.as_mut(), mock_env(), auth_info, msg).unwrap();

        // should now be 5
        let res = query(deps.as_ref(), mock_env(), QueryMsg::GetCount {}).unwrap();
        let value: GetCountResponse = from_json(res).unwrap();
        assert_eq!(5, value.count);
    }
}