#![cfg(feature = "test-bpf")]

use anchor_lang::prelude::*;
use solana_program_test::*;
use solana_sdk::signature::Keypair;

use mango_v4::state::*;
use program_test::*;

mod program_test;

// Check opening and closing positions
#[tokio::test]
async fn test_position_lifetime() -> Result<()> {
    let context = TestContext::new().await;
    let solana = &context.solana.clone();

    let admin = &Keypair::new();
    let owner = &context.users[0].key;
    let payer = &context.users[1].key;
    let mints = &context.mints[0..3];

    let payer_mint_accounts = &context.users[1].token_accounts[0..=2];

    //
    // SETUP: Create a group and accounts
    //

    let mango_setup::GroupWithTokens { group, tokens, .. } = mango_setup::GroupWithTokensConfig {
        admin,
        payer,
        mints,
    }
    .create(solana)
    .await;

    let account = send_tx(
        solana,
        AccountCreateInstruction {
            account_num: 0,
            account_size: AccountSize::Large,
            group,
            owner,
            payer,
        },
    )
    .await
    .unwrap()
    .account;

    let funding_account = send_tx(
        solana,
        AccountCreateInstruction {
            account_num: 1,
            account_size: AccountSize::Large,
            group,
            owner,
            payer,
        },
    )
    .await
    .unwrap()
    .account;

    //
    // SETUP: Put some tokens into the funding account to allow borrowing
    //
    {
        let funding_amount = 1000000;
        for &payer_token in payer_mint_accounts {
            send_tx(
                solana,
                TokenDepositInstruction {
                    amount: funding_amount,
                    account: funding_account,
                    token_account: payer_token,
                    token_authority: payer.clone(),
                    bank_index: 0,
                },
            )
            .await
            .unwrap();
        }
    }

    //
    // TEST: Deposit and withdraw tokens for all mints
    //
    {
        let start_balance = solana.token_account_balance(payer_mint_accounts[0]).await;

        // this activates the positions
        let deposit_amount = 100;
        for &payer_token in payer_mint_accounts {
            send_tx(
                solana,
                TokenDepositInstruction {
                    amount: deposit_amount,
                    account,
                    token_account: payer_token,
                    token_authority: payer.clone(),
                    bank_index: 0,
                },
            )
            .await
            .unwrap();
        }

        // this closes the positions
        for &payer_token in payer_mint_accounts {
            send_tx(
                solana,
                TokenWithdrawInstruction {
                    amount: u64::MAX,
                    allow_borrow: false,
                    account,
                    owner,
                    token_account: payer_token,
                    bank_index: 0,
                },
            )
            .await
            .unwrap();
        }

        // Check that positions are fully deactivated
        let account = get_mango_account(solana, account).await;
        assert_eq!(account.token_iter_active().count(), 0);

        // No user tokens got lost
        for &payer_token in payer_mint_accounts {
            assert_eq!(
                start_balance,
                solana.token_account_balance(payer_token).await
            );
        }
    }

    //
    // TEST: Activate a position by borrowing, then close the borrow
    //
    {
        let start_balance = solana.token_account_balance(payer_mint_accounts[0]).await;

        // collateral for the incoming borrow
        let collateral_amount = 1000;
        send_tx(
            solana,
            TokenDepositInstruction {
                amount: collateral_amount,
                account,
                token_account: payer_mint_accounts[0],
                token_authority: payer.clone(),
                bank_index: 0,
            },
        )
        .await
        .unwrap();

        // borrow some of mint1, activating the position
        let borrow_amount = 10;
        send_tx(
            solana,
            TokenWithdrawInstruction {
                amount: borrow_amount,
                allow_borrow: true,
                account,
                owner,
                token_account: payer_mint_accounts[1],
                bank_index: 0,
            },
        )
        .await
        .unwrap();
        assert_eq!(
            account_position(solana, account, tokens[1].bank).await,
            -(borrow_amount as i64)
        );

        // give it back, closing the position
        {
            send_tx(
                solana,
                TokenDepositInstruction {
                    // deposit withdraw amount + some more to cover loan origination fees
                    amount: borrow_amount + 2,
                    account,
                    token_account: payer_mint_accounts[1],
                    token_authority: payer.clone(),
                    bank_index: 0,
                },
            )
            .await
            .unwrap();
            send_tx(
                solana,
                TokenWithdrawInstruction {
                    // withdraw residual amount left
                    amount: u64::MAX,
                    allow_borrow: false,
                    account,
                    owner,
                    token_account: payer_mint_accounts[1],
                    bank_index: 0,
                },
            )
            .await
            .unwrap();
        }

        // withdraw the collateral, closing the position
        send_tx(
            solana,
            TokenWithdrawInstruction {
                amount: collateral_amount,
                allow_borrow: false,
                account,
                owner,
                token_account: payer_mint_accounts[0],
                bank_index: 0,
            },
        )
        .await
        .unwrap();

        // Check that positions are fully deactivated
        let account = get_mango_account(solana, account).await;
        assert_eq!(account.token_iter_active().count(), 0);

        // No user tokens got lost
        // TODO: -1 is a workaround for rounding down in withdraw
        for &payer_token in payer_mint_accounts {
            assert!(start_balance - 1 <= solana.token_account_balance(payer_token).await);
        }
    }

    Ok(())
}