// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import chai from 'chai'; // not esm
import {LitElement} from 'lit';
import { LogRow } from '../components/log_row';
import { FilterExpression, OrExpression, parseFilter } from '../src/filter';

before(() => {
  chai.should();
});

describe('filtering', () => {
  let testLitElements: LitElement[] = [];
  let testElements: HTMLElement[] = [];

  before(async () => {
    testLitElements = [
      new LogRow(
        {
          data: {
            // eslint-disable-next-line @typescript-eslint/naming-convention
            TargetLog: {
              moniker: 'core/hello-world',
              metadata: {
                errors: [],
                // eslint-disable-next-line @typescript-eslint/naming-convention
                component_url: 'fuchsia-pkg://fuchsia.com/hello#meta/logs.cm',
                timestamp: 123456789,
                severity: 'Info',
                tags: ['fofo', 'bar',],
                pid: 123,
                tid: 456,
                file: 'foo/main.rs',
                line: 25,
              },
              payload: {
                root: {
                  message: {
                    value: 'hello vscode'
                  },
                  keys: {
                    'string': 'oh no'
                  },
                  printf: undefined
                },
              },
            },
          },
          timestamp: 12345,
          version: 1
        }, false),
      new LogRow( //2
        {
          data: {
            // eslint-disable-next-line @typescript-eslint/naming-convention
            TargetLog: {
              moniker: 'core/bye-world',
              metadata: {
                errors: [],
                // eslint-disable-next-line @typescript-eslint/naming-convention
                component_url: 'fuchsia-pkg://fuchsia.com/bye#meta/logging.cm',
                timestamp: 123456789,
                severity: 'error',
                tags: ['foo'],
                pid: 789,
                tid: 987,
                file: 'foo/main.rs',
                line: 25,
              },
              payload: {
                root: {
                  message: {
                    value: 'goodbye vscode'
                  },
                  keys: {
                    'num': 5,
                    'bool': false,
                    'string': 'hey hey',
                  },
                  printf: undefined
                },
              },
            },
          },
          timestamp: 12345,
          version: 1
        }, false),
      new LogRow(
        {
          data: {
            // eslint-disable-next-line @typescript-eslint/naming-convention
            TargetLog: {
              moniker: 'bootstrap/hello-world',
              metadata: {
                errors: [],
                // eslint-disable-next-line @typescript-eslint/naming-convention
                component_url: 'fuchsia-pkg://fuchsia.com/hello#meta/logs.cm',
                timestamp: 123456789,
                severity: 'warn',
                tags: ['baz'],
                pid: 123,
                tid: 789,
                file: 'foo/main.rs',
                line: 25,
              },
              payload: {
                root: {
                  message: {
                    value: 'hello goodbye vscode'
                  },
                  keys: {
                    'num': 10,
                    'bool': true,
                    'string': 'hey there',
                  },
                  printf: undefined
                },
              },
            },
          },
          timestamp: 12345,
          version: 1
        }, false),
    ];

    for (const index in testLitElements) {
      document.body.appendChild(testLitElements[index]);
      await testLitElements[index].updateComplete;
      testElements.push(testLitElements[index].children[0] as HTMLElement);
    }
  });

  after(() => {
    for (const index in testLitElements) {
      testLitElements[index].remove();
    }
  });

  describe('FilterExpression', () => {
    describe('accepts', () => {
      it('returns true when no filters are set', () => {
        const expr = new OrExpression([]);
        expr.accepts(testElements[0]).should.be.true;
        expr.accepts(testElements[1]).should.be.true;
      });

      it('ANDs the given filters', () => {
        const result = parseFilter('moniker:hello-world severity:warn');
        result.ok.should.be.true;
        if (result.ok) {
          result.value.accepts(testElements[0]).should.be.false;
          result.value.accepts(testElements[1]).should.be.false;
          result.value.accepts(testElements[2]).should.be.true;
        }
      });

      it('ORs multiple categories', () => {
        const result = parseFilter('(moniker:bootstrap | message="hello vscode")');
        result.ok.should.be.true;
        if (result.ok) {
          result.value.accepts(testElements[0]).should.be.true;
          result.value.accepts(testElements[1]).should.be.false;
          result.value.accepts(testElements[2]).should.be.true;
        }
      });

      it('applies not', () => {
        const result = parseFilter('!moniker:bootstrap');
        result.ok.should.be.true;
        if (result.ok) {
          result.value.accepts(testElements[0]).should.be.true;
          result.value.accepts(testElements[1]).should.be.true;
          result.value.accepts(testElements[2]).should.be.false;
        }
      });
    });
  });

  describe('Filter', () => {
    /**
     * Utility that parses a filter string and returns the first filter parsed.
     *
     * @param expr a string with a filter
     * @returns the `Filter` parsed.
     */
    function singleFilter(expr: string): FilterExpression {
      const result = parseFilter(expr);
      if (result.ok) {
        return result.value;
      }
      throw Error(`failed to parse ${expr}: ${result.error}`);
    }

    describe('accepts', () => {
      describe('ORs the potential values of filters', () => {
        it('supports ORing multiple values for single category', () => {
          const filter = singleFilter('severity=warn|error');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;
        });
      });

      describe('severity', () => {
        it('handles minimum severity', () => {
          let filter = singleFilter('severity:error');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('severity>=warn');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('severity>warn');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('handles exact severity', () => {
          let filter = singleFilter('severity=warn');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('handles maximum severity', () => {
          let filter = singleFilter('severity<warn');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('severity<=warn');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });
      });

      describe('moniker', () => {
        it('handles contains', () => {
          let filter = singleFilter('moniker:hello');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('handles equals', () => {
          let filter = singleFilter('moniker=core/bye-world');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('handles regexes', () => {
          let filter = singleFilter('moniker=/^core.+$/');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('moniker:/he.*lo/');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });
      });

      describe('pid, tid', () => {
        it('handle contains', () => {
          let filter = singleFilter('pid:123');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('tid:456');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('handle equals', () => {
          let filter = singleFilter('pid=123');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('tid=456');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.false;
        });
      });

      describe('tag', () => {
        it('handles contains', () => {
          let filter = singleFilter('tag:fo');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('handles equals', () => {
          let filter = singleFilter('tag=foo');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });
      });

      describe('package-name', () => {
        it('handles contains', () => {
          let filter = singleFilter('package-name:lo');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('handles equals', () => {
          let filter = singleFilter('package-name=bye');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });
      });

      describe('manifest', () => {
        it('handles contains', () => {
          let filter = singleFilter('manifest:log');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('handles equals', () => {
          let filter = singleFilter('manifest=logs.cm');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });
      });

      describe('message', () => {
        it('handles contains', () => {
          let filter = singleFilter('message:goodbye');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('handles equals', () => {
          let filter = singleFilter('message="goodbye vscode"');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });
      });

      describe('custom', () => {
        it('supports string ops on string fields', () => {
          let filter = singleFilter('string:hey');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('string="hey hey"');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('supports equals and contains with regexes', () => {
          let filter = singleFilter('string:/^hey/');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('string=/o.*no/');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('supports numeric ops on number fields', () => {
          let filter = singleFilter('num>3');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('num>=10');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('num=5');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('num:10');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('num<10');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('num<=10');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('supports equals and contains (as equals) on boolean fields', () => {
          let filter = singleFilter('bool=true');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('bool:false');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;
        });
      });

      describe('any', () => {
        it('supports string ops on any field', () => {
          let filter = singleFilter('any=hello');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('any:hey');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.true;
        });

        it('supports raw strings', () => {
          let filter = singleFilter('hello');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;

          filter = singleFilter('not hello');
          filter.accepts(testElements[0]).should.be.false;
          filter.accepts(testElements[1]).should.be.true;
          filter.accepts(testElements[2]).should.be.false;

          filter = singleFilter('"hello vscode"');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.false;
        });

        it('supports raw regexes', () => {
          let filter = singleFilter('/hel+o/');
          filter.accepts(testElements[0]).should.be.true;
          filter.accepts(testElements[1]).should.be.false;
          filter.accepts(testElements[2]).should.be.true;
        });
      });
    });
  });
});