/*
 * Copyright (C) Sapphirecode - All Rights Reserved
 * This file is part of graphviz-builder which is released under MIT.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, June 2020
 */

import { GraphStream, Color } from '../../lib/index';

const simple = `graph foo {
}

`;

const complex = `digraph foo {
  subgraph cluster_foo_baz {
    color = #ff0000
    style = bold

    subgraph cluster_foo_baz_nested {
      color = #808080
      style = dotted

      subgraph cluster_foo_baz_nested_unnamed {
        color = #808080
        style = dotted

      }

    }

    foo_baz_asd [label = "asd"]
    foo_baz_test [style = "bold", color = "#808080"]
  }

  foo_baz [label = "baz"]
  foo_foo [label = "foo"]
  foo_foo -> foo_baz
  foo_foo -> foo_baz_asd [label = "edge attr"]
}

`;

// eslint-disable-next-line max-lines-per-function
describe ('stream', () => {
  it ('stream graph', () => new Promise<void> ((resolve) => {
    let output = '';
    const stream = (new GraphStream);
    stream.on ('data', (data) => {
      output += data;
    });
    stream.on ('end', () => {
      expect (output)
        .toEqual (simple);
      resolve ();
    });
    stream.create_graph ('foo', 'u');
    stream.end_graph ();
    stream.end ();
  }));

  // eslint-disable-next-line max-statements
  it ('complex stream graph', () => new Promise<void> ((resolve) => {
    let output = '';
    const stream = (new GraphStream);
    stream.on ('data', (data) => {
      output += data;
    });
    stream.on ('end', () => {
      expect (output)
        .toEqual (complex);
      resolve ();
    });
    stream.create_graph ('foo', 'd');
    stream.create_graph ('baz');
    stream.attributes ({ color: Color.red, style: 'bold' });
    stream.create_graph ('nested');
    stream.attributes ({ color: Color.gray, style: 'dotted' });
    stream.create_graph ('unnamed');
    stream.attributes ({ color: Color.gray, style: 'dotted' });
    stream.end_graph ();
    stream.end_graph ();
    const asd = stream.create_node ('asd');
    stream.attributes ({ label: 'asd' });
    stream.end_node ();
    stream.create_node ('test');
    stream.attributes ({ style: 'bold', color: Color.gray });
    stream.end_graph ();
    const baz = stream.create_node ('baz');
    stream.attributes ({ label: 'baz' });
    const foo = stream.create_node ('foo');
    stream.attributes ({ label: 'foo' });
    stream.create_edge (foo, baz);
    stream.create_edge (foo, asd);
    stream.attributes ({ label: 'edge attr' });
    stream.end_graph ();
    stream.end ();
  }));

  // eslint-disable-next-line max-lines-per-function
  it ('should reject invalid command sequences', () => {
    /**
     * command  valid                 invalid
     * [s]      cug, cdg              eg, cn, csg, ce, at
     * cn       eg, cn, csg, ce, at   cug, cdg
     * cug      eg, cn, csg, ce, at   cug, cdg
     * cdg      eg, cn, csg, ce, at   cug, cdg
     * csg      eg, cn, csg, ce, at   cug, cdg
     * eg       eg, cn, csg, ce       cug, cdg, at
     * at       eg, cn, csg, ce       cug, cdg, at
     * ce       eg, cn, csg, ce, at   cug, cdg
     */

    const cn = (g: GraphStream) => {
      g.create_node ('foo');
    };
    const cug = (g: GraphStream) => {
      g.create_graph ('foo', 'u');
    };
    const cdg = (g: GraphStream) => {
      g.create_graph ('foo', 'd');
    };
    const csg = (g: GraphStream) => {
      g.create_graph ('foo', 's');
    };
    const eg = (g: GraphStream) => {
      g.end_graph ();
    };
    const at = (g: GraphStream) => {
      g.attributes ({ color: 'red' });
    };
    const ce = (g: GraphStream) => {
      g.create_edge ('foo', 'bar');
    };

    const combinations = [
      {
        primary: (g: GraphStream) => {
          cug (g);
          cn (g);
        },
        secondary: [
          cug,
          cdg
        ]
      },
      {
        primary:   cug,
        secondary: [
          cug,
          cdg
        ]
      },
      {
        primary:   cdg,
        secondary: [
          cug,
          cdg
        ]
      },
      {
        primary:   (g: GraphStream) => {
          cug (g);
          csg (g);
        },
        secondary: [
          cug,
          cdg
        ]
      },
      {
        primary:   (g: GraphStream) => {
          cug (g);
          csg (g);
          eg (g);
        },
        secondary: [
          cug,
          cdg,
          at
        ]
      },
      {
        primary:   (g: GraphStream) => {
          cug (g);
          at (g);
        },
        secondary: [
          cug,
          cdg,
          at
        ]
      },
      {
        primary:   (g: GraphStream) => {
          cug (g);
          ce (g);
        },
        secondary: [
          cug,
          cdg
        ]
      }
    ];

    for (const comb of combinations) {
      for (const secondary of comb.secondary) {
        const g = (new GraphStream);
        comb.primary (g);
        expect (() => secondary (g))
          .toThrowError (
            /invalid state to execute command.*?expected:.*?actual:/uis
          );
      }
    }
  });
});