import * as t from "@babel/types";
import { GenericParseContext } from "../../encoding";
import { objectPattern } from "../../utils";
import { restoreExtension, variableSlug } from "@cosmology/utils";
import { buildExportCreators } from "../../utils";

export const rpcHookFuncArguments = (): t.ObjectPattern[] => {
    return [
        objectPattern(
            [
                t.objectProperty(
                    t.identifier("rpc"),
                    t.identifier("rpc"),
                    false,
                    true
                ),
            ],
            t.tsTypeAnnotation(
                t.tsTypeLiteral([
                    t.tsPropertySignature(
                        t.identifier("rpc"),
                        t.tsTypeAnnotation(
                            t.tsTypeReference(t.identifier("Rpc"))
                        )
                    ),
                ])
            )
        ),
    ];
};

export const rpcHookClassArguments = (): t.ObjectExpression[] => {
    return [
        t.objectExpression([
            t.objectProperty(
                t.identifier("rpc"),
                t.identifier("rpc"),
                false,
                true
            ),
        ]),
    ];
};

/**
 * Create an AST for a certain key and hook.
 * eg: __fixtures__/output1/hooks.ts
 * v1beta2: _AkashAuditV1beta2Queryrpc.createRpcQueryHooks(rpc)
 * @param {Object=} imports - imports array reference for generating imports.
 * @param {Object=} path - filename of a package.
 * @param {string} methodName - hook method name of packages
 * @returns {ParseResult} created AST
 */
export const rpcHookNewTmRequire = (
    imports: HookImport[],
    path: string,
    methodName: string,
    options?: {
        restoreImportExtension?: string;
    }
) => {
    const editedPath = restoreExtension(
        variableSlug(path),
        options?.restoreImportExtension
    );

    imports.push({
        as: editedPath,
        path,
    });

    return t.callExpression(
        t.memberExpression(
            t.identifier(editedPath),
            t.identifier(methodName)
        ),
        [t.identifier("rpc")]
    );
};

export const rpcHookRecursiveObjectProps = (names: string[], leaf?: any) => {
    const [name, ...rest] = names;

    let baseComponent;
    if (names.length === 1) {
        baseComponent = leaf ? leaf : t.identifier(name);
    } else {
        baseComponent = rpcHookRecursiveObjectProps(rest, leaf);
    }

    return t.objectExpression([
        t.objectProperty(t.identifier(name), baseComponent),
    ]);
};

/**
 * Create an ASTs for hooks of packages recursively, and get imports of packages.
 * eg: __fixtures__/output1/hooks.ts
 * export const createRpcQueryHooks = ...
 * @param {Object=} imports - imports array reference for generating imports.
 * @param {Object=} obj - mapping of packages and rpc query filenames
 * @param {string} methodName - hook method name of packages
 * @returns {ParseResult} created AST
 */
export const rpcHookTmNestedImportObject = (
    imports: HookImport[],
    obj: object,
    methodName: string,
    options?: {
        restoreImportExtension?: string;
    }
) => {
    //if obj is a path, end recursion and get the mapping.
    if (typeof obj === "string") {
        return rpcHookNewTmRequire(imports, obj, methodName);
    }

    const keys = Object.keys(obj);

    // get hooks for keys of the obj.
    return t.objectExpression(
        keys.map((name) => {
            return t.objectProperty(
                t.identifier(name),
                rpcHookTmNestedImportObject(
                    imports,
                    obj[name],
                    methodName,
                    options
                )
            );
        })
    );
};

interface HookImport {
    as: string;
    path: string;
}

/**
 * Create an ASTs for createRpcQueryHooks and imports of related packages.
 * eg: __fixtures__/output1/hooks.ts
 * import * as _AkashAuditV1beta2Queryrpc from ...
 * export const createRpcQueryHooks = ...
 * @param {Object=} context - context of generating the file
 * @param {Object=} obj - mapping of packages and rpc query filenames
 * @param {string} identifier - name of function creating hooks. eg: createRpcQueryHooks
 * @returns {ParseResult} created AST
 */
export const createScopedRpcHookFactory = (
    context: GenericParseContext,
    obj: object,
    identifier: string,
    instantHooksMapping?: {
        [key: string]: {
            useHookName: string;
            importedVarName: string;
            comment?: string;
        };
    }
) => {
    return buildExportCreators(
        context,
        obj,
        identifier,
        ["ProtobufRpcClient"],
        undefined,
        instantHooksMapping
    );
};