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use anchor_client::{solana_sdk::pubkey::Pubkey, Client};
use anyhow::Result;
use mpl_token_metadata::{
    instruction::{create_master_edition_v3, create_metadata_accounts_v3},
    state::{CollectionDetails, Creator},
};
use spl_associated_token_account::{
    get_associated_token_address, instruction::create_associated_token_account,
};
use spl_token::{
    instruction::{initialize_mint, mint_to},
    ID as TOKEN_PROGRAM_ID,
};

use crate::{
    candy_machine::CANDY_MACHINE_ID,
    common::*,
    config::ConfigData,
    pdas::{find_master_edition_pda, find_metadata_pda},
};

pub fn create_collection(
    client: &Client,
    _candy_machine: Pubkey,
    cache: &mut Cache,
    config_data: &ConfigData,
) -> Result<(Signature, Pubkey)> {
    let program = client.program(CANDY_MACHINE_ID);
    let payer = program.payer();

    let collection_mint = Keypair::new();
    let collection_item: &mut CacheItem = match cache.items.get_mut("-1") {
        Some(item) => item,
        None => {
            return Err(anyhow!("Trying to create and set collection when collection item info isn't in cache! This shouldn't happen!"));
        }
    };

    // Allocate memory for the account
    let min_rent = program
        .rpc()
        .get_minimum_balance_for_rent_exemption(MINT_LAYOUT as usize)?;

    // Create mint account
    let create_mint_account_ix = system_instruction::create_account(
        &payer,
        &collection_mint.pubkey(),
        min_rent,
        MINT_LAYOUT,
        &TOKEN_PROGRAM_ID,
    );

    // Initialize mint ix
    let init_mint_ix = initialize_mint(
        &TOKEN_PROGRAM_ID,
        &collection_mint.pubkey(),
        &payer,
        Some(&payer),
        0,
    )?;

    let ata_pubkey = get_associated_token_address(&payer, &collection_mint.pubkey());

    // Create associated account instruction
    let create_assoc_account_ix =
        create_associated_token_account(&payer, &payer, &collection_mint.pubkey(), &spl_token::ID);

    // Mint to instruction
    let mint_to_ix = mint_to(
        &TOKEN_PROGRAM_ID,
        &collection_mint.pubkey(),
        &ata_pubkey,
        &payer,
        &[],
        1,
    )?;

    let creator = Creator {
        address: payer,
        verified: true,
        share: 100,
    };
    let collection_metadata_pubkey = find_metadata_pda(&collection_mint.pubkey());

    let create_metadata_account_ix = create_metadata_accounts_v3(
        mpl_token_metadata::ID,
        collection_metadata_pubkey,
        collection_mint.pubkey(),
        payer,
        payer,
        payer,
        collection_item.name.clone(),
        config_data.symbol.clone(),
        collection_item.metadata_link.clone(),
        Some(vec![creator]),
        0,
        true,
        true,
        None,
        None,
        Some(CollectionDetails::V1 { size: 0 }),
    );

    let collection_edition_pubkey = find_master_edition_pda(&collection_mint.pubkey());

    let create_master_edition_ix = create_master_edition_v3(
        mpl_token_metadata::ID,
        collection_edition_pubkey,
        collection_mint.pubkey(),
        payer,
        payer,
        collection_metadata_pubkey,
        payer,
        Some(0),
    );

    let builder = program
        .request()
        .instruction(create_mint_account_ix)
        .instruction(init_mint_ix)
        .instruction(create_assoc_account_ix)
        .instruction(mint_to_ix)
        .signer(&collection_mint)
        .instruction(create_metadata_account_ix)
        .instruction(create_master_edition_ix);

    let sig = builder.send()?;

    collection_item.on_chain = true;
    cache.program.collection_mint = collection_mint.pubkey().to_string();
    cache.sync_file()?;

    Ok((sig, collection_mint.pubkey()))
}