'use strict';
/* global Promise */

var Ajv = require('./ajv')
  , should = require('./chai').should();


describe('compileAsync method', function() {
  var ajv, loadCallCount;

  var SCHEMAS = {
    "http://example.com/object.json": {
      "$id": "http://example.com/object.json",
      "properties": {
        "a": { "type": "string" },
        "b": { "$ref": "int2plus.json" }
      }
    },
    "http://example.com/int2plus.json": {
      "$id": "http://example.com/int2plus.json",
      "type": "integer",
      "minimum": 2
    },
    "http://example.com/tree.json": {
      "$id": "http://example.com/tree.json",
      "type": "array",
      "items": { "$ref": "leaf.json" }
    },
    "http://example.com/leaf.json": {
      "$id": "http://example.com/leaf.json",
      "properties": {
        "name": { "type": "string" },
        "subtree": { "$ref": "tree.json" }
      }
    },
    "http://example.com/recursive.json": {
      "$id": "http://example.com/recursive.json",
      "properties": {
        "b": { "$ref": "parent.json" }
      },
      "required": ["b"]
    },
    "http://example.com/invalid.json": {
      "$id": "http://example.com/recursive.json",
      "properties": {
        "invalid": { "type": "number" }
      },
      "required": "invalid"
    },
    "http://example.com/foobar.json": {
      "$id": "http://example.com/foobar.json",
      "$schema": "http://example.com/foobar_meta.json",
      "myFooBar": "foo"
    },
    "http://example.com/foobar_meta.json": {
      "$id": "http://example.com/foobar_meta.json",
      "type": "object",
      "properties": {
        "myFooBar": {
          "enum": ["foo", "bar"]
        }
      }
    },
    "http://example.com/foo.json": {
      "$id": "http://example.com/foo.json",
      "type": "object",
      "properties": {
        "bar": {"$ref": "bar.json"},
        "other": {"$ref": "other.json"}
      }
    },
    "http://example.com/bar.json": {
      "$id": "http://example.com/bar.json",
      "type": "object",
      "properties": {
        "foo": {"$ref": "foo.json"}
      }
    },
    "http://example.com/other.json": {
      "$id": "http://example.com/other.json"
    }
  };

  beforeEach(function() {
    loadCallCount = 0;
    ajv = new Ajv({ loadSchema: loadSchema });
  });


  it('should compile schemas loading missing schemas with options.loadSchema function', function() {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": { "$ref": "object.json" }
      }
    };
    return ajv.compileAsync(schema).then(function (validate) {
      should.equal(loadCallCount, 2);
      validate .should.be.a('function');
      validate({ a: { b: 2 } }) .should.equal(true);
      validate({ a: { b: 1 } }) .should.equal(false);
    });
  });


  it('should compile schemas loading missing schemas and return function via callback', function (done) {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": { "$ref": "object.json" }
      }
    };
    ajv.compileAsync(schema, function (err, validate) {
      should.equal(loadCallCount, 2);
      should.not.exist(err);
      validate .should.be.a('function');
      validate({ a: { b: 2 } }) .should.equal(true);
      validate({ a: { b: 1 } }) .should.equal(false);
      done();
    });
  });


  it('should correctly load schemas when missing reference has JSON path', function() {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": { "$ref": "object.json#/properties/b" }
      }
    };
    return ajv.compileAsync(schema).then(function (validate) {
      should.equal(loadCallCount, 2);
      validate .should.be.a('function');
      validate({ a: 2 }) .should.equal(true);
      validate({ a: 1 }) .should.equal(false);
    });
  });


  it('should correctly compile with remote schemas that have mutual references', function() {
    var schema = {
      "$id": "http://example.com/root.json",
      "properties": {
        "tree": { "$ref": "tree.json" }
      }
    };
    return ajv.compileAsync(schema).then(function (validate) {
      validate .should.be.a('function');
      var validData = { tree: [
        { name: 'a', subtree: [ { name: 'a.a' } ] },
        { name: 'b' }
      ] };
      var invalidData = { tree: [
        { name: 'a', subtree: [ { name: 1 } ] }
      ] };
      validate(validData) .should.equal(true);
      validate(invalidData) .should.equal(false);
    });
  });


  it('should correctly compile with remote schemas that reference the compiled schema', function() {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": { "$ref": "recursive.json" }
      }
    };
    return ajv.compileAsync(schema).then(function (validate) {
      should.equal(loadCallCount, 1);
      validate .should.be.a('function');
      var validData = { a: { b: { a: { b: {} } } } };
      var invalidData = { a: { b: { a: {} } } };
      validate(validData) .should.equal(true);
      validate(invalidData) .should.equal(false);
    });
  });


  it('should resolve reference containing "properties" segment with the same property (issue #220)', function() {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": {
          "$ref": "object.json#/properties/a"
        }
      }
    };
    return ajv.compileAsync(schema).then(function (validate) {
      should.equal(loadCallCount, 2);
      validate .should.be.a('function');
      validate({ a: 'foo' }) .should.equal(true);
      validate({ a: 42 }) .should.equal(false);
    });
  });


  describe('loading metaschemas (#334)', function() {
    it('should load metaschema if not available', function() {
      return test(SCHEMAS['http://example.com/foobar.json'], 1);
    });

    it('should load metaschema of referenced schema if not available', function() {
      return test({ "$ref": "http://example.com/foobar.json" }, 2);
    });

    function test(schema, expectedLoadCallCount) {
      ajv.addKeyword('myFooBar', {
        type: 'string',
        validate: function (sch, data) {
          return sch == data;
        }
      });

      return ajv.compileAsync(schema).then(function (validate) {
        should.equal(loadCallCount, expectedLoadCallCount);
        validate .should.be.a('function');
        validate('foo') .should.equal(true);
        validate('bar') .should.equal(false);
      });
    }
  });


  it('should return compiled schema on the next tick if there are no references (#51)', function() {
    var schema = {
      "$id": "http://example.com/int2plus.json",
      "type": "integer",
      "minimum": 2
    };
    var beforeCallback1;
    var p1 = ajv.compileAsync(schema).then(function (validate) {
      beforeCallback1 .should.equal(true);
      spec(validate);
      var beforeCallback2;
      var p2 = ajv.compileAsync(schema).then(function (_validate) {
        beforeCallback2 .should.equal(true);
        spec(_validate);
      });
      beforeCallback2 = true;
      return p2;
    });
    beforeCallback1 = true;
    return p1;

    function spec(validate) {
      should.equal(loadCallCount, 0);
      validate .should.be.a('function');
      var validData = 2;
      var invalidData = 1;
      validate(validData) .should.equal(true);
      validate(invalidData) .should.equal(false);
    }
  });


  it('should queue calls so only one compileAsync executes at a time (#52)', function() {
    var schema = {
      "$id": "http://example.com/parent.json",
      "properties": {
        "a": { "$ref": "object.json" }
      }
    };

    return Promise.all([
      ajv.compileAsync(schema).then(spec),
      ajv.compileAsync(schema).then(spec),
      ajv.compileAsync(schema).then(spec)
    ]);

    function spec(validate) {
      should.equal(loadCallCount, 2);
      validate .should.be.a('function');
      validate({ a: { b: 2 } }) .should.equal(true);
      validate({ a: { b: 1 } }) .should.equal(false);
    }
  });


  it('should throw exception if loadSchema is not passed', function (done) {
    var schema = {
      "$id": "http://example.com/int2plus.json",
      "type": "integer",
      "minimum": 2
    };
    ajv = new Ajv;
    should.throw(function() {
      ajv.compileAsync(schema, function() {
        done(new Error('it should have thrown exception'));
      });
    });
    setTimeout(function() {
      // function is needed for the test to pass in Firefox 4
      done();
    });
  });


  describe('should return error via callback', function() {
    it('if passed schema is invalid', function (done) {
      var invalidSchema = {
        "$id": "http://example.com/int2plus.json",
        "type": "integer",
        "minimum": "invalid"
      };
      ajv.compileAsync(invalidSchema, shouldFail(done));
    });

    it('if loaded schema is invalid', function (done) {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "invalid.json" }
        }
      };
      ajv.compileAsync(schema, shouldFail(done));
    });

    it('if required schema is loaded but the reference cannot be resolved', function (done) {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "object.json#/definitions/not_found" }
        }
      };
      ajv.compileAsync(schema, shouldFail(done));
    });

    it('if loadSchema returned error', function (done) {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "object.json" }
        }
      };
      ajv = new Ajv({ loadSchema: badLoadSchema });
      ajv.compileAsync(schema, shouldFail(done));

      function badLoadSchema() {
        return Promise.reject(new Error('cant load'));
      }
    });

    it('if schema compilation throws some other exception', function (done) {
      ajv.addKeyword('badkeyword', { compile: badCompile });
      var schema = { badkeyword: true };
      ajv.compileAsync(schema, shouldFail(done));

      function badCompile(/* schema */) {
        throw new Error('cant compile keyword schema');
      }
    });

    function shouldFail(done) {
      return function (err, validate) {
        should.exist(err);
        should.not.exist(validate);
        done();
      };
    }
  });


  describe('should return error via promise', function() {
    it('if passed schema is invalid', function() {
      var invalidSchema = {
        "$id": "http://example.com/int2plus.json",
        "type": "integer",
        "minimum": "invalid"
      };
      return shouldReject(ajv.compileAsync(invalidSchema));
    });

    it('if loaded schema is invalid', function() {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "invalid.json" }
        }
      };
      return shouldReject(ajv.compileAsync(schema));
    });

    it('if required schema is loaded but the reference cannot be resolved', function() {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "object.json#/definitions/not_found" }
        }
      };
      return shouldReject(ajv.compileAsync(schema));
    });

    it('if loadSchema returned error', function() {
      var schema = {
        "$id": "http://example.com/parent.json",
        "properties": {
          "a": { "$ref": "object.json" }
        }
      };
      ajv = new Ajv({ loadSchema: badLoadSchema });
      return shouldReject(ajv.compileAsync(schema));

      function badLoadSchema() {
        return Promise.reject(new Error('cant load'));
      }
    });

    it('if schema compilation throws some other exception', function() {
      ajv.addKeyword('badkeyword', { compile: badCompile });
      var schema = { badkeyword: true };
      return shouldReject(ajv.compileAsync(schema));

      function badCompile(/* schema */) {
        throw new Error('cant compile keyword schema');
      }
    });

    function shouldReject(p) {
      return p.then(
        function(validate) {
          should.not.exist(validate);
          throw new Error('Promise has resolved; it should have rejected');
        },
        function(err) {
          should.exist(err);
        }
      );
    }
  });


  describe('schema with multiple remote properties, the first is recursive schema (#801)', function() {
    it('should validate data', function() {
      var schema = {
        "$id": "http://example.com/list.json",
        "type": "object",
        "properties": {
          "foo": {"$ref": "foo.json"}
        }
      };

      return ajv.compileAsync(schema).then(function (validate) {
        validate({foo: {}}) .should.equal(true);
      });
    });
  });


  function loadSchema(uri) {
    loadCallCount++;
    return new Promise(function (resolve, reject) {
      setTimeout(function() {
        if (SCHEMAS[uri]) resolve(SCHEMAS[uri]);
        else reject(new Error('404'));
      }, 10);
    });
  }
});