/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

@testable import Client
import Foundation
import XCTest
import Shared

private let DefaultSearchEngineName = "Google"
private let ExpectedEngineNames = ["Amazon.com", "Bing", "DuckDuckGo", "Google", "Twitter", "Wikipedia", "Yahoo"]

class SearchEnginesTests: XCTestCase {

    func testIncludesExpectedEngines() {
        // Verify that the set of shipped engines includes the expected subset.
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files).orderedEngines
        XCTAssertTrue((engines?.count)! >= ExpectedEngineNames.count)

        for engineName in ExpectedEngineNames {
            XCTAssertTrue(((engines?.filter { engine in engine.shortName == engineName })?.count)! > 0)
        }
    }

    func testDefaultEngineOnStartup() {
        // If this is our first run, Yahoo should be first for the en locale.
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)
        XCTAssertEqual(engines.defaultEngine.shortName, DefaultSearchEngineName)
        XCTAssertEqual(engines.orderedEngines[0].shortName, DefaultSearchEngineName)
    }

    func testAddingAndDeletingCustomEngines() {
        let testEngine = OpenSearchEngine(engineID: "ATester", shortName: "ATester", image: UIImage(), searchTemplate: "http://firefox.com/find?q={searchTerm}", suggestTemplate: nil, isCustomEngine: true)
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)
        engines.addSearchEngine(testEngine)
        XCTAssertEqual(engines.orderedEngines[1].engineID, testEngine.engineID)

        engines.deleteCustomEngine(testEngine)
        let deleted = engines.orderedEngines.filter {$0 == testEngine}
        XCTAssertEqual(deleted, [])
    }

    func testDefaultEngine() {
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)
        let engineSet = engines.orderedEngines

        engines.defaultEngine = (engineSet?[0])!
        XCTAssertTrue(engines.isEngineDefault((engineSet?[0])!))
        XCTAssertFalse(engines.isEngineDefault((engineSet?[1])!))
        // The first ordered engine is the default.
        XCTAssertEqual(engines.orderedEngines[0].shortName, engineSet?[0].shortName)

        engines.defaultEngine = (engineSet?[1])!
        XCTAssertFalse(engines.isEngineDefault((engineSet?[0])!))
        XCTAssertTrue(engines.isEngineDefault((engineSet?[1])!))
        // The first ordered engine is the default.
        XCTAssertEqual(engines.orderedEngines[0].shortName, engineSet?[1].shortName)

        let engines2 = SearchEngines(prefs: profile.prefs, files: profile.files)
        // The default engine should have been persisted.
        XCTAssertTrue(engines2.isEngineDefault((engineSet?[1])!))
        // The first ordered engine is the default.
        XCTAssertEqual(engines.orderedEngines[0].shortName, engineSet?[1].shortName)
    }

    func testOrderedEngines() {
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)

        engines.orderedEngines = [ExpectedEngineNames[4], ExpectedEngineNames[2], ExpectedEngineNames[0]].map { name in
            for engine in engines.orderedEngines {
                if engine.shortName == name {
                    return engine
                }
            }
            XCTFail("Could not find engine: \(name)")
            return engines.orderedEngines.first!
        }
        XCTAssertEqual(engines.orderedEngines[0].shortName, ExpectedEngineNames[4])
        XCTAssertEqual(engines.orderedEngines[1].shortName, ExpectedEngineNames[2])
        XCTAssertEqual(engines.orderedEngines[2].shortName, ExpectedEngineNames[0])

        let engines2 = SearchEngines(prefs: profile.prefs, files: profile.files)
        // The ordering should have been persisted.
        XCTAssertEqual(engines2.orderedEngines[0].shortName, ExpectedEngineNames[4])
        XCTAssertEqual(engines2.orderedEngines[1].shortName, ExpectedEngineNames[2])
        XCTAssertEqual(engines2.orderedEngines[2].shortName, ExpectedEngineNames[0])

        // Remaining engines should be appended in alphabetical order.
        XCTAssertEqual(engines2.orderedEngines[3].shortName, ExpectedEngineNames[1])
        XCTAssertEqual(engines2.orderedEngines[4].shortName, ExpectedEngineNames[3])
        XCTAssertEqual(engines2.orderedEngines[5].shortName, ExpectedEngineNames[5])
        XCTAssertEqual(engines2.orderedEngines[6].shortName, ExpectedEngineNames[6])
    }

    func testQuickSearchEngines() {
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)
        let engineSet = engines.orderedEngines

        // You can't disable the default engine.
        engines.defaultEngine = (engineSet?[1])!
        engines.disableEngine((engineSet?[1])!)
        XCTAssertTrue(engines.isEngineEnabled((engineSet?[1])!))

        // The default engine is not included in the quick search engines.
        XCTAssertEqual(0, engines.quickSearchEngines.filter { engine in engine.shortName == engineSet?[1].shortName }.count)

        // Enable and disable work.
        engines.enableEngine((engineSet?[0])!)
        XCTAssertTrue(engines.isEngineEnabled((engineSet?[0])!))
        XCTAssertEqual(1, engines.quickSearchEngines.filter { engine in engine.shortName == engineSet?[0].shortName }.count)

        engines.disableEngine((engineSet?[0])!)
        XCTAssertFalse(engines.isEngineEnabled((engineSet?[0])!))
        XCTAssertEqual(0, engines.quickSearchEngines.filter { engine in engine.shortName == engineSet?[0].shortName }.count)

        // Setting the default engine enables it.
        engines.defaultEngine = (engineSet?[0])!
        XCTAssertTrue(engines.isEngineEnabled((engineSet?[1])!))

        // Setting the order may change the default engine, which enables it.
        engines.orderedEngines = [(engineSet?[2])!, (engineSet?[1])!, (engineSet?[0])!]
        XCTAssertTrue(engines.isEngineDefault((engineSet?[2])!))
        XCTAssertTrue(engines.isEngineEnabled((engineSet?[2])!))

        // The enabling should be persisted.
        engines.enableEngine((engineSet?[2])!)
        engines.disableEngine((engineSet?[1])!)
        engines.enableEngine((engineSet?[0])!)

        let engines2 = SearchEngines(prefs: profile.prefs, files: profile.files)
        XCTAssertTrue(engines2.isEngineEnabled((engineSet?[2])!))
        XCTAssertFalse(engines2.isEngineEnabled((engineSet?[1])!))
        XCTAssertTrue(engines2.isEngineEnabled((engineSet?[0])!))
    }

    func testSearchSuggestionSettings() {
        let profile = MockProfile()
        let engines = SearchEngines(prefs: profile.prefs, files: profile.files)

        // By default, you should see search suggestions
        XCTAssertTrue(engines.shouldShowSearchSuggestions)

        // Setting should be persisted.
        engines.shouldShowSearchSuggestions = false

        let engines2 = SearchEngines(prefs: profile.prefs, files: profile.files)
        XCTAssertFalse(engines2.shouldShowSearchSuggestions)
    }

    func testDirectoriesForLanguageIdentifier() {
        XCTAssertEqual(
            SearchEngines.directoriesForLanguageIdentifier("nl", basePath: "/tmp", fallbackIdentifier: "en"),
            ["/tmp/nl", "/tmp/en"]
        )
        XCTAssertEqual(
            SearchEngines.directoriesForLanguageIdentifier("en-US", basePath: "/tmp", fallbackIdentifier: "en"),
            ["/tmp/en-US", "/tmp/en"]
        )
        XCTAssertEqual(
            SearchEngines.directoriesForLanguageIdentifier("es-MX", basePath: "/tmp", fallbackIdentifier: "en"),
            ["/tmp/es-MX", "/tmp/es", "/tmp/en"]
        )
        XCTAssertEqual(
            SearchEngines.directoriesForLanguageIdentifier("zh-Hans-CN", basePath: "/tmp", fallbackIdentifier: "en"),
            ["/tmp/zh-Hans-CN", "/tmp/zh-CN", "/tmp/zh", "/tmp/en"]
        )
    }
}