/* eslint max-nested-callbacks:0 */

'use strict';

var metadata = require('../src/metadata.js');
var fs = require('fs');
var path = require('path');
var assert = require('assert');

require('string.fromcodepoint');

describe('Metadata service', function() {
  it('should throw error when using old options', function() {
    assert.throws(metadata.bind(metadata, {
      appendUnicode: true,
    }));
  });

  describe('for code generation', function() {

    it('should extract right unicodes from files', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/hello.svg', function(err, infos) {
        if(err) {
          return done(err);
        }
        assert.deepEqual(
          infos, {
            path: '/var/plop/hello.svg',
            name: 'hello',
            unicode: [String.fromCharCode(0xEA01)],
            renamed: false,
          }
        );
        done();
      });
    });

    it('should append unicodes to files when the option is set', function(done) {
      var metadataService = metadata({
        prependUnicode: true,
        log: function() {},
        error: function() {
          done(new Error('Not supposed to be here'));
        },
      });

      fs.writeFileSync(path.join(__dirname, 'results', 'plop.svg'), 'plop', 'utf-8');
      metadataService(path.join(__dirname, 'results', 'plop.svg'), function(err, infos) {
        if(err) {
          return done(err);
        }
        assert.deepEqual(
          infos, {
            path: path.join(__dirname, 'results', 'uEA01-plop.svg'),
            name: 'plop',
            unicode: [String.fromCharCode(0xEA01)],
            renamed: true,
          }
        );
        assert(fs.existsSync(path.join(__dirname, 'results', 'uEA01-plop.svg')));
        assert(!fs.existsSync(path.join(__dirname, 'results', 'plop.svg')));
        fs.unlinkSync(path.join(__dirname, 'results', 'uEA01-plop.svg'));
        done();
      });
    });

    it('should log file rename errors', function(done) {
      var metadataService = metadata({
        prependUnicode: true,
        startUnicode: 0xEA02,
        error: function() {},
        log: function() {
          done(new Error('Not supposed to be here'));
        },
      });

      metadataService(path.join(__dirname, 'results', 'plop.svg'), function(err, infos) {
        assert(!infos);
        assert(err);
        assert(!fs.existsSync(path.join(__dirname, 'results', 'uEA02-plop.svg')));
        done();
      });
    });

  });

  describe('for code extraction', function() {

    it('should work for simple codes', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/u0001-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/u0001-hello.svg',
          name: 'hello',
          unicode: [String.fromCharCode(0x0001)],
          renamed: false,
        });
        done();
      });
    });

    it('should work for several codes', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/u0001,u0002-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/u0001,u0002-hello.svg',
          name: 'hello',
          unicode: [String.fromCharCode(0x0001), String.fromCharCode(0x0002)],
          renamed: false,
        });
        done();
      });
    });

    it('should work for higher codepoint codes', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/u1F63A-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/u1F63A-hello.svg',
          name: 'hello',
          unicode: [String.fromCodePoint(0x1f63a)],
          renamed: false,
        });
        done();
      });
    });

    it('should work for ligature codes', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/u0001u0002-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/u0001u0002-hello.svg',
          name: 'hello',
          unicode: [String.fromCharCode(0x0001) + String.fromCharCode(0x0002)],
          renamed: false,
        });
        done();
      });
    });

    it('should work for nested codes', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/u0001u0002,u0001-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/u0001u0002,u0001-hello.svg',
          name: 'hello',
          unicode: [
            String.fromCharCode(0x0001) + String.fromCharCode(0x0002),
            String.fromCharCode(0x0001),
          ],
          renamed: false,
        });
        done();
      });
    });

    it('should not set the same codepoint twice', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/uEA01-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/uEA01-hello.svg',
          name: 'hello',
          unicode: [String.fromCharCode(0xEA01)],
          renamed: false,
        });
        metadataService('/var/plop/plop.svg', function(err2, infos2) {
          assert(!err2);
          assert.deepEqual(infos2, {
            path: '/var/plop/plop.svg',
            name: 'plop',
            unicode: [String.fromCharCode(0xEA02)],
            renamed: false,
          });
          done();
        });
      });
    });

    it('should not set the same codepoint twice with different cases', function(done) {
      var metadataService = metadata();

      metadataService('/var/plop/UEA01-hello.svg', function(err, infos) {
        assert(!err);
        assert.deepEqual(infos, {
          path: '/var/plop/UEA01-hello.svg',
          name: 'hello',
          unicode: [String.fromCharCode(0xEA01)],
          renamed: false,
        });
        metadataService('/var/plop/uEA02-hello.svg', function(err2, infos2) {
          assert(!err2);
          assert.deepEqual(infos2, {
            path: '/var/plop/uEA02-hello.svg',
            name: 'hello',
            unicode: [String.fromCharCode(0xEA02)],
            renamed: false,
          });
          metadataService('/var/plop/bell-o.svg', function(err3, infos3) {
            assert(!err3);
            assert.deepEqual(infos3, {
              path: '/var/plop/bell-o.svg',
              name: 'bell-o',
              unicode: [String.fromCharCode(0xEA03)],
              renamed: false,
            });
            done();
          });
        });
      });
    });

  });

});