const getExplorerAccountLinkFor = (account, network) => {
	const prefix = getExplorerPrefix(network)
	const POAnetwokIDs = [77, 99, 100]
	if (POAnetwokIDs.includes(parseInt(network))) {
		return `https://blockscout.com/poa/${prefix}/address/${account}`
	} else {
		return `https://${prefix}etherscan.io/address/${account}`
	}
}

const getExplorerTxLinkFor = (hash, network) => {
	const prefix = getExplorerPrefix(network)
	const POAnetwokIDs = [77, 99, 100]
	if (POAnetwokIDs.includes(parseInt(network))) {
		return `https://blockscout.com/poa/${prefix}/tx/${hash}`
	} else {
		return `https://${prefix}etherscan.io/tx/${hash}`
	}
}

const getExplorerTokenLinkFor = (tokenAddress, account, network) => {
	const prefix = getExplorerPrefix(network)
	const POAnetwokIDs = [77, 99, 100]
	if (POAnetwokIDs.includes(parseInt(network))) {
		return `https://blockscout.com/poa/${prefix}/address/${tokenAddress}`
	} else {
		return `https://${prefix}etherscan.io/token/${tokenAddress}?a=${account}`
	}
}

function getExplorerPrefix (network) {
	const net = parseInt(network)
	let prefix
	switch (net) {
	case 1: // main net
		prefix = ''
		break
	case 3: // ropsten test net
		prefix = 'ropsten.'
		break
	case 4: // rinkeby test net
		prefix = 'rinkeby.'
		break
	case 42: // kovan test net
		prefix = 'kovan.'
		break
	case 77: // POA Sokol test net
		prefix = 'sokol'
		break
	case 99: // POA Core net
		prefix = 'core'
		break
	case 100: // Dai chain
		prefix = 'dai'
		break
	default:
		prefix = ''
	}
	return prefix
}

module.exports = {
	getExplorerAccountLinkFor,
	getExplorerTxLinkFor,
	getExplorerTokenLinkFor,
}