import {Function, ModuleMetaCircular, getIn, getOut} from "./metacircular.js";
import {ModuleTyped} from "./typed.js";
import {ModuleBool} from "./primitives/bool.js";
import { Double_to_Double_to_Double, ModuleDouble, mulDouble } from "./primitives/double.js";
import {Int_to_Int_to_Int, ModuleInt, mulInt} from "./primitives/int.js";
import {Int} from "./primitives/symbols.js";
import { makeSquare } from "./lib/square.js";
import {makeIdFn} from "./lib/id.js";
import {ModuleLiterals} from "./lib/literals.js";

import {DefaultMap} from "./util.js";
import { ModuleModule } from "./structures/module.js";

class Context {
  constructor(mod) {
    // input type -> Function-signature
    this.functionsFrom = new DefaultMap(() => []);
    this.functionsTo = new DefaultMap(() => []);
    this.types = new DefaultMap(() => []);
    this.instances = new DefaultMap(() => []);


    for (const {i, t} of mod) {
      this.addInstance({i, t});
    }

    // console.log(this.instances.m);


    // const callEveryFunction = ({i,t}, indent=0) => {
    //   for (const fntype of this.functionsFrom.getdefault(t)) {
    //     for (const fn of this.instances.getdefault(fntype)) {
    //       console.log("    ", fn, ':', fntype);
    //       const result = fn(i);
    //       const resultType = getOut(fntype);
    //       console.log("  ".repeat(indent), i, '->', result);
    //       if (this.types.getdefault(resultType).includes(Function)) {
    //         if (indent < 2) {
    //           callEveryFunction({i: result, t: resultType}, indent+1)
    //         }
    //       }
    //     }
    //   }
    // };

    // const callFunction = (typ, fns) => {
    //   console.log("Functions callable on", typ, ":");
    //   for (const fn of fns) {
    //     console.log("  ", fn);
    //     for (const FN of this.instances.getdefault(fn)) {
    //       console.log("    ", FN);
    //       for (const i of this.instances.getdefault(typ)) {
    //         const result = FN(i);
    //         const resultType = getOut(fn);
    //         console.log("      ", i, '->', result);
    //         if (this.types.getdefault(resultType).includes(Function)) {
    //           callFunction(resultType, )
    //       }
    //       }
    //     }
    //   }
    // };

    const callFunctionOnEveryValue = (fn, fnType, indent=1) => {
      const inType = getIn(fnType);
      const outType = getOut(fnType);
      console.log("--".repeat(indent), fn, ':', fnType);
      for (const i of this.instances.getdefault(inType)) {
        const result = fn(i);
        console.log("--".repeat(indent+1), i, '->', result);
        if (this.types.getdefault(outType).includes(Function)) {
          if (indent < 5) {
            callFunctionOnEveryValue(result, outType, indent+2);
          }
        }
      }
    }
    for (const fntypes of this.functionsFrom.m.values()) {
      for (const fntype of fntypes) {
        for (const fn of this.instances.getdefault(fntype)) {
          callFunctionOnEveryValue(fn, fntype);
        }
      }
    }

    // for (const [i, ts] of this.types.m.entries()) {
    //   for (const t of ts) {
    //     callEveryFunction({i,t});
    //   }
    // }


    // // Conformance check
    // for (const fn of this.instances.getdefault(conformanceCheck)) {
    //   const t = fn.inType;
    //   for (const i of this.instances.getdefault(t)) {
    //     if (!fn.fn(i)) {
    //       console.warn(i, 'is not conform', 'to', t);
    //     }
    //     else {
    //       console.info('👍', i, 'conforms to', t);
    //     }
    //   }
    // }

    // const MAXDEPTH = 0;

    // let calls = 0;
    // const tryEveryFunction = ({i, t}, maxDepth) => {
    //   calls++;
    //   for (const fn of this.functionsFrom.getdefault(t)) {
    //     const outType = getOut(fn);
    //     // console.log("  ".repeat(MAXDEPTH-maxDepth) + 'calling', fn, 'on', i);
    //     const result = fn(i);
    //     console.log("  ".repeat(MAXDEPTH-maxDepth), result, 'should be of type', outType);
    //     if (outType === TypeLink && result.t === undefined) {
    //       console.warn("  ".repeat(MAXDEPTH-maxDepth) + '  ^ invalid')
    //     }
    //     if (outType === Int && (typeof result) !== "number") {
    //       console.warn("  ".repeat(MAXDEPTH-maxDepth) + '  ^ invalid')
    //     }
    //     this.addInstance({i: result, t: outType});
    //     if (maxDepth > 0) {
    //       tryEveryFunction({i: result, t: outType}, maxDepth-1);
    //     }
    //   }
    // }

    // for (const {i, t} of mod) {
    //   tryEveryFunction({i, t}, MAXDEPTH);
    // }

    // console.log("calls:", calls);
  }

  addInstance({i, t}) {
    const arr = this.types.getdefault(i, true);
    arr.push(t);
    const arrI = this.instances.getdefault(t, true);
    arrI.push(i);
    if (t === Function) {
      const arr = this.functionsFrom.getdefault(getIn(i), true);
      arr.push(i);
      const arrTo = this.functionsTo.getdefault(getOut(i), true);
      arrTo.push(i);
    }
    else {
    }
  }
}


const ctx = new Context([
  ...ModuleMetaCircular,
  ...ModuleTyped,
  // ...ModuleConformable,
  // ...ModuleConformanceCheckConforms,
  // ...ModuleNum,
  // ...ModuleEq,
  ...ModuleBool,
  ...ModuleInt,
  ...ModuleDouble,
  // ...ModuleSquare,
  // ...ModuleList,
  ...makeIdFn(Int),
  ...makeSquare({i: mulInt, t: Int_to_Int_to_Int}),
  ...makeSquare({i: mulDouble, t: Double_to_Double_to_Double}),
  ...ModuleLiterals,
  ...ModuleModule,
]);