/**
 * The kind table is the one place a kind is described. Everything a kind needs – its lists, its
 * name and mark, its empty value, its tag, its port – has to follow from the row alone, so each
 * check here walks the table rather than naming a kind.
 */
import { describe, expect, it } from 'vitest';
import { AddVariableCommand } from '../../src/core/commands/variableCommands';
import { declaredPortType, portDefOf } from '../../src/core/graph';
import { BUILT_IN_NODES } from '../../src/core/graph/nodes';
import { tagOf, untag } from '../../src/core/model/Properties';
import { findAsset } from '../../src/core/model/Project';
import {
  coerceField,
  DECLARED_PORT_KINDS,
  emptyOf,
  FIELD_KINDS,
  isKindWith,
  isTaggedKind,
  KIND,
  KINDS,
  kindLabel,
  kindMark,
  LIST_ITEM_KINDS,
  plainKindOf,
  STRUCT_FIELD_KINDS,
  VARIABLE_KINDS,
} from '../../src/core/properties/kinds';
import { itemKindOf, listItemOf, makeItem } from '../../src/core/properties/listItems';
import { deserializeProject } from '../../src/core/store/serialize';
import { makeBehavior, makeProject, roundTrip } from '../helpers';

const TAGGED = FIELD_KINDS.filter(isTaggedKind);
/** A value of the type a tagged kind travels as, distinct from the kind's empty value. */
const sampleOf = (kind: (typeof TAGGED)[number]) => (KIND[kind].travels === 'number' ? 0xff0000 : 'walk-up');

describe('the kind table', () => {
  it('has a word and a mark for every kind a user can pick, and no two marks alike', () => {
    const picked = new Set([...VARIABLE_KINDS, ...FIELD_KINDS, ...DECLARED_PORT_KINDS]);
    for (const kind of picked) {
      expect(kindLabel(kind), kind).not.toBe(kind);
      expect(kindMark(kind), kind).not.toBe('?');
    }
    expect(new Set([...picked].map(kindMark)).size).toBe(picked.size);
  });

  it('derives the kind lists from the roles, the depth rules on top', () => {
    for (const row of KINDS) {
      expect(VARIABLE_KINDS.includes(row.kind as never), row.kind).toBe(isKindWith('variable', row.kind));
      expect(FIELD_KINDS.includes(row.kind as never), row.kind).toBe(isKindWith('field', row.kind));
      expect(DECLARED_PORT_KINDS.includes(row.kind as never), row.kind).toBe(isKindWith('port', row.kind));
    }
    expect(LIST_ITEM_KINDS).toEqual([...FIELD_KINDS, 'struct']);
    expect(STRUCT_FIELD_KINDS).toEqual([...FIELD_KINDS, 'list']);
  });

  it('reads nothing as the empty value of a kind, and the empty value as itself', () => {
    for (const kind of FIELD_KINDS) {
      expect(coerceField(undefined, kind), kind).toBe(emptyOf(kind));
      expect(coerceField(emptyOf(kind), kind), kind).toBe(emptyOf(kind));
    }
  });

  it('reads a bare value as the untagged kind travelling its way', () => {
    for (const kind of FIELD_KINDS) {
      if (isTaggedKind(kind)) continue;
      expect(plainKindOf(KIND[kind].travels), kind).toBe(kind);
      expect(itemKindOf(emptyOf(kind)), kind).toBe(kind);
    }
  });
});

describe('a tagged kind', () => {
  it('wraps what it reads, and reads back as itself', () => {
    for (const kind of TAGGED) {
      const item = makeItem(kind, sampleOf(kind));
      expect(tagOf(item), kind).toBe(kind);
      expect(itemKindOf(item), kind).toBe(kind);
      expect(untag(item), kind).toBe(sampleOf(kind));
      expect(listItemOf(item), kind).toEqual(item);
      // The bare value beside it is the plain kind – which is why the tag is needed at all.
      expect(itemKindOf(sampleOf(kind)), kind).toBe(plainKindOf(KIND[kind].travels));
    }
  });

  it('survives a save and load in a list variable and in a node parameter', () => {
    for (const kind of TAGGED) {
      const item = makeItem(kind, sampleOf(kind));
      const f = makeProject();
      const behavior = makeBehavior(f, 'B');
      f.stack.execute(new AddVariableCommand(behavior.id, 'items', 'list'));
      findAsset(f.project, behavior.id)!.props.items = [item, sampleOf(kind)];
      expect(findAsset(roundTrip(f.project), behavior.id)?.props.items, kind).toEqual([item, sampleOf(kind)]);

      const loaded = deserializeProject({
        id: 'p',
        assets: [
          {
            id: 'b',
            type: 'behavior',
            name: 'B',
            graph: { nodes: [{ id: 'n', type: 'List', x: 0, y: 0, params: { value: [item] } }], edges: [] },
          },
        ],
      });
      const asset = findAsset(loaded, 'b');
      expect(asset?.type === 'behavior' && asset.graph.nodes[0]?.params.value, kind).toEqual([item]);
    }
  });
});

describe('a declared port', () => {
  it('travels as the table says, and carries the field that edits it only when tagged', () => {
    for (const kind of DECLARED_PORT_KINDS) {
      expect(declaredPortType(kind), kind).toBe(KIND[kind].travels);
      expect(portDefOf({ key: 'p', kind }).field?.kind, kind).toBe(isTaggedKind(kind) ? kind : undefined);
    }
  });
});

describe('the literal nodes', () => {
  it('are one per kind: named, typed and edited as the kind they hand out', () => {
    for (const [type, kind] of [
      ['Number', 'number'],
      ['Boolean', 'boolean'],
      ['String', 'text'],
      ['Texture', 'texture'],
      ['StateMachine', 'statemachine'],
      ['List', 'list'],
    ] as const) {
      const def = BUILT_IN_NODES.find((d) => d.type === type)!;
      expect(def.label, type).toBe(kindLabel(kind));
      expect(def.outputs[0]?.type, type).toBe(KIND[kind].travels);
      expect(def.params[0]?.kind, type).toBe(kind);
    }
  });
});