use drillx::Solution;
use steel::*;

use crate::{
    consts::*,
    instruction::*,
    state::{bus_pda, config_pda, proof_pda, treasury_pda},
};

/// Builds an auth instruction.
pub fn auth(proof: Pubkey) -> Instruction {
    Instruction {
        program_id: NOOP_PROGRAM_ID,
        accounts: vec![],
        data: proof.to_bytes().to_vec(),
    }
}

/// Builds a claim instruction.
pub fn claim(signer: Pubkey, beneficiary: Pubkey, amount: u64) -> Instruction {
    let proof = proof_pda(signer).0;
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new(beneficiary, false),
            AccountMeta::new(proof, false),
            AccountMeta::new_readonly(TREASURY_ADDRESS, false),
            AccountMeta::new(TREASURY_TOKENS_ADDRESS, false),
            AccountMeta::new_readonly(spl_token::ID, false),
        ],
        data: Claim {
            amount: amount.to_le_bytes(),
        }
        .to_bytes(),
    }
}

/// Builds a close instruction.
pub fn close(signer: Pubkey) -> Instruction {
    let proof = proof_pda(signer).0;
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new(proof, false),
            AccountMeta::new_readonly(solana_program::system_program::ID, false),
        ],
        data: Close {}.to_bytes(),
    }
}

/// Builds a mine instruction.
pub fn mine(
    signer: Pubkey,
    authority: Pubkey,
    bus: Pubkey,
    solution: Solution,
    boost_keys: Option<[Pubkey; 2]>,
) -> Instruction {
    let proof = proof_pda(authority).0;
    let mut accounts = vec![
        AccountMeta::new(signer, true),
        AccountMeta::new(bus, false),
        AccountMeta::new_readonly(CONFIG_ADDRESS, false),
        AccountMeta::new(proof, false),
        AccountMeta::new_readonly(sysvar::instructions::ID, false),
        AccountMeta::new_readonly(sysvar::slot_hashes::ID, false),
    ];
    if let Some([boost_address, boost_config_address]) = boost_keys {
        accounts.push(AccountMeta::new_readonly(boost_address, false));
        accounts.push(AccountMeta::new(proof_pda(boost_address).0, false));
        accounts.push(AccountMeta::new_readonly(boost_config_address, false));
    }
    Instruction {
        program_id: crate::ID,
        accounts,
        data: Mine {
            digest: solution.d,
            nonce: solution.n,
        }
        .to_bytes(),
    }
}

/// Builds an open instruction.
pub fn open(signer: Pubkey, miner: Pubkey, payer: Pubkey) -> Instruction {
    let proof_pda = proof_pda(signer);
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new_readonly(miner, false),
            AccountMeta::new(payer, true),
            AccountMeta::new(proof_pda.0, false),
            AccountMeta::new_readonly(solana_program::system_program::ID, false),
            AccountMeta::new_readonly(sysvar::slot_hashes::ID, false),
        ],
        data: Open {}.to_bytes(),
    }
}

/// Builds a reset instruction.
pub fn reset(signer: Pubkey) -> Instruction {
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new(BUS_ADDRESSES[0], false),
            AccountMeta::new(BUS_ADDRESSES[1], false),
            AccountMeta::new(BUS_ADDRESSES[2], false),
            AccountMeta::new(BUS_ADDRESSES[3], false),
            AccountMeta::new(BUS_ADDRESSES[4], false),
            AccountMeta::new(BUS_ADDRESSES[5], false),
            AccountMeta::new(BUS_ADDRESSES[6], false),
            AccountMeta::new(BUS_ADDRESSES[7], false),
            AccountMeta::new(CONFIG_ADDRESS, false),
            AccountMeta::new(MINT_ADDRESS, false),
            AccountMeta::new(TREASURY_ADDRESS, false),
            AccountMeta::new(TREASURY_TOKENS_ADDRESS, false),
            AccountMeta::new_readonly(spl_token::ID, false),
        ],
        data: Reset {}.to_bytes(),
    }
}

// Build an update instruction.
pub fn update(signer: Pubkey, miner: Pubkey) -> Instruction {
    let proof = proof_pda(signer).0;
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new_readonly(miner, false),
            AccountMeta::new(proof, false),
        ],
        data: Update {}.to_bytes(),
    }
}

/// Builds an initialize instruction.
pub fn initialize(signer: Pubkey) -> Instruction {
    let bus_pdas = [
        bus_pda(0),
        bus_pda(1),
        bus_pda(2),
        bus_pda(3),
        bus_pda(4),
        bus_pda(5),
        bus_pda(6),
        bus_pda(7),
    ];
    let config_pda = config_pda();
    let mint_pda = Pubkey::find_program_address(&[MINT, MINT_NOISE.as_slice()], &crate::ID);
    let treasury_pda = treasury_pda();
    let metadata_pda = Pubkey::find_program_address(
        &[
            METADATA,
            mpl_token_metadata::ID.as_ref(),
            mint_pda.0.as_ref(),
        ],
        &mpl_token_metadata::ID,
    );
    Instruction {
        program_id: crate::ID,
        accounts: vec![
            AccountMeta::new(signer, true),
            AccountMeta::new(bus_pdas[0].0, false),
            AccountMeta::new(bus_pdas[1].0, false),
            AccountMeta::new(bus_pdas[2].0, false),
            AccountMeta::new(bus_pdas[3].0, false),
            AccountMeta::new(bus_pdas[4].0, false),
            AccountMeta::new(bus_pdas[5].0, false),
            AccountMeta::new(bus_pdas[6].0, false),
            AccountMeta::new(bus_pdas[7].0, false),
            AccountMeta::new(config_pda.0, false),
            AccountMeta::new(metadata_pda.0, false),
            AccountMeta::new(mint_pda.0, false),
            AccountMeta::new(treasury_pda.0, false),
            AccountMeta::new(TREASURY_TOKENS_ADDRESS, false),
            AccountMeta::new_readonly(system_program::ID, false),
            AccountMeta::new_readonly(spl_token::ID, false),
            AccountMeta::new_readonly(spl_associated_token_account::ID, false),
            AccountMeta::new_readonly(mpl_token_metadata::ID, false),
            AccountMeta::new_readonly(sysvar::rent::ID, false),
        ],
        data: Initialize {}.to_bytes(),
    }
}