export type EVMVersion =
  | 'homestead'
  | 'tangerineWhistle'
  | 'spuriousDragon'
  | 'byzantium'
  | 'constantinople'
  | 'petersburg'
  | 'istanbul'
  | 'berlin'
  | 'london'
  | 'paris'
  | null;

export type Language = 'Solidity' | 'Yul';

export type Source = {
  [fileName: string]: {
    // Optional: keccak256 hash of the source file
    keccak256?: string;
    // Required (unless "urls" is used): literal contents of the source file
    content: string;
    urls?: string[];
  };
};

export type CompilerInput = {
  // Required: Source code language. Currently supported are "Solidity" and "Yul".
  language: Language;
  // Required
  sources: Source;
  // Optional
  settings: {
    // Optional: Sorted list of remappings
    remappings?: string[];
    // Optional: Optimizer settings
    optimizer: {
      // disabled by default
      enabled: boolean;
      // Optimize for how many times you intend to run the code.
      // Lower values will optimize more for initial deployment cost, higher
      // values will optimize more for high-frequency usage.
      runs: number;
      // Switch optimizer components on or off in detail.
      // The "enabled" switch above provides two defaults which can be
      // tweaked here. If "details" is given, "enabled" can be omitted.
      details?: {
        // The peephole optimizer is always on if no details are given,
        // use details to switch it off.
        peephole?: boolean;
        // The unused jumpdest remover is always on if no details are given,
        // use details to switch it off.
        jumpdestRemover?: boolean;
        // Sometimes re-orders literals in commutative operations.
        orderLiterals?: boolean;
        // Removes duplicate code blocks
        deduplicate?: boolean;
        // Common subexpression elimination, this is the most complicated step but
        // can also provide the largest gain.
        cse?: boolean;
        // Optimize representation of literal numbers and strings in code.
        constantOptimizer?: boolean;
        // The new Yul optimizer. Mostly operates on the code of ABIEncoderV2.
        // It can only be activated through the details here.
        yul?: boolean;
        // Tuning options for the Yul optimizer.
        yulDetails?: {
          // Improve allocation of stack slots for variables, can free up stack slots early.
          // Activated by default if the Yul optimizer is activated.
          stackAllocation: boolean;
        };
      };
    };
    // Version of the EVM to compile for.
    // Affects type checking and code generation.
    evmVersion?: EVMVersion;
    // Optional: Debugging settings
    debug?: {
      // How to treat revert (and require) reason strings. Settings are
      // "default", "strip", "debug" and "verboseDebug".
      // "default" does not inject compiler-generated revert strings and keeps user-supplied ones.
      // "strip" removes all revert strings (if possible, i.e. if literals are used) keeping side-effects
      // "debug" injects strings for compiler-generated internal reverts (not yet implemented)
      // "verboseDebug" even appends further information to user-supplied revert strings (not yet implemented)
      revertStrings: 'default' | 'strip' | 'debug' | 'verboseDebug';
    };
    // Metadata settings (optional)
    metadata?: {
      // Use only literal content and not URLs (false by default)
      useLiteralContent: boolean;
      // Use the given hash method for the metadata hash that is appended to the bytecode.
      // The metadata hash can be removed from the bytecode via option "none".
      // The other options are "ipfs" and "bzzr1".
      // If the option is omitted, "ipfs" is used by default.
      bytecodeHash: 'ipfs' | 'bzzr1' | 'none';
    };
    // Addresses of the libraries. If not all libraries are given here,
    // it can result in unlinked objects whose output data is different.
    libraries?: {
      // The top level key is the the name of the source file where the library is used.
      // If remappings are used, this source file should match the global path
      // after remappings were applied.
      // If this key is an empty string, that refers to a global level.
      [fileName: string]: Record<string, string>;
    };
    // The following can be used to select desired outputs based
    // on file and contract names.
    // If this field is omitted, then the compiler loads and does type checking,
    // but will not generate any outputs apart from errors.
    // The first level key is the file name and the second level key is the contract name.
    // An empty contract name is used for outputs that are not tied to a contract
    // but to the whole source file like the AST.
    // A star as contract name refers to all contracts in the file.
    // Similarly, a star as a file name matches all files.
    // To select all outputs the compiler can possibly generate, use
    // "outputSelection: { "*": { "*": [ "*" ], "": [ "*" ] } }"
    // but note that this might slow down the compilation process needlessly.
    //
    // The available output types are as follows:
    //
    // File level (needs empty string as contract name):
    //   ast - AST of all source files
    //   legacyAST - legacy AST of all source files
    //
    // Contract level (needs the contract name or "*"):
    //   abi - ABI
    //   devdoc - Developer documentation (natspec)
    //   userdoc - User documentation (natspec)
    //   metadata - Metadata
    //   ir - Yul intermediate representation of the code before optimization
    //   irOptimized - Intermediate representation after optimization
    //   storageLayout - Slots, offsets and types of the contract's state variables.
    //   evm.assembly - New assembly format
    //   evm.legacyAssembly - Old-style assembly format in JSON
    //   evm.bytecode.object - Bytecode object
    //   evm.bytecode.opcodes - Opcodes list
    //   evm.bytecode.sourceMap - Source mapping (useful for debugging)
    //   evm.bytecode.linkReferences - Link references (if unlinked object)
    //   evm.deployedBytecode* - Deployed bytecode (has the same options as evm.bytecode)
    //   evm.methodIdentifiers - The list of function hashes
    //   evm.gasEstimates - Function gas estimates
    //   ewasm.wast - eWASM S-expressions format (not supported at the moment)
    //   ewasm.wasm - eWASM binary format (not supported at the moment)
    //
    // Note that using a using `evm`, `evm.bytecode`, `ewasm`, etc. will select every
    // target part of that output. Additionally, `*` can be used as a wildcard to request everything.
    //
    outputSelection?: {
      '*': {
        '': ['ast'];
        '*': [
          'abi',
          'metadata',
          'devdoc',
          'userdoc',
          'storageLayout',
          'evm.legacyAssembly',
          'evm.bytecode',
          'evm.deployedBytecode',
          'evm.methodIdentifiers',
          'evm.gasEstimates',
          'evm.assembly'
        ];
      };
    };
  };
};