use ore_api::prelude::*;
use solana_program::program_pack::Pack;
use spl_token::state::Mint;
use steel::*;

/// Initialize sets up the ORE program to begin mining.
pub fn process_initialize(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
    // Load accounts.
    let [signer_info, config_info, metadata_info, mint_info, treasury_info, treasury_tokens_info, system_program, token_program, associated_token_program, metadata_program, rent_sysvar] =
        accounts
    else {
        return Err(ProgramError::NotEnoughAccountKeys);
    };
    signer_info.is_signer()?.has_address(&INITIALIZER_ADDRESS)?;
    config_info
        .is_empty()?
        .is_writable()?
        .has_seeds(&[CONFIG], &ore_api::ID)?;
    metadata_info.is_empty()?.is_writable()?.has_seeds(
        &[
            METADATA,
            mpl_token_metadata::ID.as_ref(),
            MINT_ADDRESS.as_ref(),
        ],
        &mpl_token_metadata::ID,
    )?;
    mint_info
        .is_empty()?
        .is_writable()?
        .has_seeds(&[MINT, MINT_NOISE.as_slice()], &ore_api::ID)?;
    treasury_info
        .is_empty()?
        .is_writable()?
        .has_seeds(&[TREASURY], &ore_api::ID)?;
    treasury_tokens_info.is_empty()?.is_writable()?;
    system_program.is_program(&system_program::ID)?;
    token_program.is_program(&spl_token::ID)?;
    associated_token_program.is_program(&spl_associated_token_account::ID)?;
    metadata_program.is_program(&mpl_token_metadata::ID)?;
    rent_sysvar.is_sysvar(&sysvar::rent::ID)?;

    // Initialize config.
    create_program_account::<Config>(
        config_info,
        system_program,
        signer_info,
        &ore_api::ID,
        &[CONFIG],
    )?;
    let config = config_info.as_account_mut::<Config>(&ore_api::ID)?;
    // config.base_reward_rate = INITIAL_BASE_REWARD_RATE;
    config.last_reset_at = 0;
    config.best_hash = [u8::MAX; 32];
    config.best_proof = Pubkey::default();
    config.challenge = [0; 32];
    config.block_reward = 0;

    // Initialize treasury.
    create_program_account::<Treasury>(
        treasury_info,
        system_program,
        signer_info,
        &ore_api::ID,
        &[TREASURY],
    )?;

    // Initialize mint.
    allocate_account_with_bump(
        mint_info,
        system_program,
        signer_info,
        Mint::LEN,
        &spl_token::ID,
        &[MINT, MINT_NOISE.as_slice()],
        MINT_BUMP,
    )?;
    initialize_mint_signed_with_bump(
        mint_info,
        treasury_info,
        None,
        token_program,
        rent_sysvar,
        TOKEN_DECIMALS,
        &[MINT, MINT_NOISE.as_slice()],
        MINT_BUMP,
    )?;

    // Initialize mint metadata.
    mpl_token_metadata::instructions::CreateMetadataAccountV3Cpi {
        __program: metadata_program,
        metadata: metadata_info,
        mint: mint_info,
        mint_authority: treasury_info,
        payer: signer_info,
        update_authority: (signer_info, true),
        system_program,
        rent: Some(rent_sysvar),
        __args: mpl_token_metadata::instructions::CreateMetadataAccountV3InstructionArgs {
            data: mpl_token_metadata::types::DataV2 {
                name: METADATA_NAME.to_string(),
                symbol: METADATA_SYMBOL.to_string(),
                uri: METADATA_URI.to_string(),
                seller_fee_basis_points: 0,
                creators: None,
                collection: None,
                uses: None,
            },
            is_mutable: true,
            collection_details: None,
        },
    }
    .invoke_signed(&[&[TREASURY, &[TREASURY_BUMP]]])?;

    // Initialize treasury token account.
    create_associated_token_account(
        signer_info,
        treasury_info,
        treasury_tokens_info,
        mint_info,
        system_program,
        token_program,
        associated_token_program,
    )?;

    Ok(())
}