import XCTest
@testable import ReynaCLIHostCore
import Foundation

final class ContactsAuthorizationTests: XCTestCase {

    struct AlreadyAuthorizedProvider: ContactsAuthorizationProviding {
        func authorizationStatus() -> ContactsAuthorizationStatus { .authorized }
        func requestAccess() throws -> Bool {
            XCTFail("must not call requestAccess when already authorized")
            return false
        }
    }

    struct NotDeterminedGranted: ContactsAuthorizationProviding {
        func authorizationStatus() -> ContactsAuthorizationStatus { .notDetermined }
        func requestAccess() throws -> Bool { true }
    }

    struct NotDeterminedDenied: ContactsAuthorizationProviding {
        func authorizationStatus() -> ContactsAuthorizationStatus { .notDetermined }
        func requestAccess() throws -> Bool { false }
    }

    struct DeniedProvider: ContactsAuthorizationProviding {
        func authorizationStatus() -> ContactsAuthorizationStatus { .denied }
        func requestAccess() throws -> Bool { false }
    }

    struct ErrorProvider: ContactsAuthorizationProviding {
        func authorizationStatus() -> ContactsAuthorizationStatus { .notDetermined }
        func requestAccess() throws -> Bool {
            throw ContactsProviderError.unavailable("disk error")
        }
    }

    struct EmptyContactsSearch: ContactsSearchProviding {
        func searchContacts(query: String?, limit: Int) throws -> [ContactListItem] { [] }
    }

    struct EmptyContactsRead: ContactsReadProviding {
        func readContact(id: String) throws -> ContactDetailItem {
            throw ContactsProviderError.notFound("not found")
        }
    }

    struct EmptyContactsCreate: ContactsCreateProviding {
        func createContact(firstName: String?, lastName: String?, organization: String?, jobTitle: String?, note: String?, email: ContactEmailLabelValue?, phone: ContactPhoneLabelValue?) throws -> ContactCreateResult {
            throw ContactsProviderError.unavailable("no create")
        }
    }

    struct EmptyCalendarList: CalendarListProviding {
        func listCalendars() throws -> [CalendarListItem] { [] }
    }

    func testAlreadyAuthorizedNoRequest() {
        let auth = AlreadyAuthorizedProvider()
        let req = Request(id: "c-a1", operation: "contacts.request_access", arguments: .object([:]))
        let resp = dispatch(request: req, calendarProvider: EmptyCalendarList(), eventsProvider: FakeEventsProvider(events: []), createProvider: FakeCreateProvider(willReturn: sampleEvent()), authProvider: MockCalAuth(status: .authorized), contactsAuthProvider: auth, contactsSearchProvider: EmptyContactsSearch(), contactsReadProvider: EmptyContactsRead(), contactsCreateProvider: EmptyContactsCreate())
        XCTAssertTrue(resp.ok)
        XCTAssertEqual(resp.result?.status, "authorized")
        XCTAssertNil(resp.result?.contacts, "auth response must not leak contacts")
        XCTAssertNil(resp.result?.contact)
    }

    func testNotDeterminedGrantedReturnsAuthorized() {
        let auth = NotDeterminedGranted()
        let req = Request(id: "c-a2", operation: "contacts.request_access", arguments: .object([:]))
        let resp = dispatch(request: req, calendarProvider: EmptyCalendarList(), eventsProvider: FakeEventsProvider(events: []), createProvider: FakeCreateProvider(willReturn: sampleEvent()), authProvider: MockCalAuth(status: .authorized), contactsAuthProvider: auth, contactsSearchProvider: EmptyContactsSearch(), contactsReadProvider: EmptyContactsRead(), contactsCreateProvider: EmptyContactsCreate())
        XCTAssertTrue(resp.ok)
        XCTAssertEqual(resp.result?.status, "authorized")
        XCTAssertEqual(resp.result?.operation, "contacts.request_access")
    }

    func testDeniedReturnsPermissionDenied() {
        let auth = NotDeterminedDenied()
        let req = Request(id: "c-a3", operation: "contacts.request_access", arguments: .object([:]))
        let resp = dispatch(request: req, calendarProvider: EmptyCalendarList(), eventsProvider: FakeEventsProvider(events: []), createProvider: FakeCreateProvider(willReturn: sampleEvent()), authProvider: MockCalAuth(status: .authorized), contactsAuthProvider: auth, contactsSearchProvider: EmptyContactsSearch(), contactsReadProvider: EmptyContactsRead(), contactsCreateProvider: EmptyContactsCreate())
        XCTAssertFalse(resp.ok)
        XCTAssertEqual(resp.error?.code, "permission_denied")
    }

    func testErrorReturnsContactsUnavailable() {
        let auth = ErrorProvider()
        let req = Request(id: "c-a4", operation: "contacts.request_access", arguments: .object([:]))
        let resp = dispatch(request: req, calendarProvider: EmptyCalendarList(), eventsProvider: FakeEventsProvider(events: []), createProvider: FakeCreateProvider(willReturn: sampleEvent()), authProvider: MockCalAuth(status: .authorized), contactsAuthProvider: auth, contactsSearchProvider: EmptyContactsSearch(), contactsReadProvider: EmptyContactsRead(), contactsCreateProvider: EmptyContactsCreate())
        XCTAssertFalse(resp.ok)
        XCTAssertEqual(resp.error?.code, "contacts_unavailable")
    }

    func testContactsSearchDoesNotCallAuthRequest() {
        final class SpySearch: ContactsSearchProviding, @unchecked Sendable {
            var called = false
            func searchContacts(query: String?, limit: Int) throws -> [ContactListItem] {
                called = true
                return []
            }
        }
        final class SpyAuth: ContactsAuthorizationProviding, @unchecked Sendable {
            var didRequest = false
            func authorizationStatus() -> ContactsAuthorizationStatus { .authorized }
            func requestAccess() throws -> Bool {
                didRequest = true
                return false
            }
        }
        let search = SpySearch()
        let cAuth = SpyAuth()
        let req = Request(id: "cs-1", operation: "contacts.search", arguments: .object(["query": .string("john"), "limit": .number(10)]))
        let resp = dispatch(request: req, calendarProvider: EmptyCalendarList(), eventsProvider: FakeEventsProvider(events: []), createProvider: FakeCreateProvider(willReturn: sampleEvent()), authProvider: MockCalAuth(status: .authorized), contactsAuthProvider: cAuth, contactsSearchProvider: search, contactsReadProvider: EmptyContactsRead(), contactsCreateProvider: EmptyContactsCreate())
        XCTAssertTrue(resp.ok)
        XCTAssertFalse(cAuth.didRequest, "contacts.search must never trigger authorization request")
        XCTAssertTrue(search.called)
    }

    // Bridging tests reuse same bridge pattern – verify contacts bridge pumps run loop
    func testContactsBridgePumpsMainRunLoop() {
        let exp = expectation(description: "contacts bridge")
        final class Box: @unchecked Sendable { var granted = false; var error: Error? = nil }
        let box = Box()
        DispatchQueue.main.async {
            let bridge = ContactsMainRunLoopBridge()
            do {
                box.granted = try bridge.requestAccess(timeout: 2) { completion in
                    Timer.scheduledTimer(withTimeInterval: 0.02, repeats: false) { _ in
                        completion(true, nil)
                    }
                }
            } catch {
                box.error = error
            }
            exp.fulfill()
        }
        wait(for: [exp], timeout: 5)
        XCTAssertNil(box.error)
        XCTAssertTrue(box.granted)
    }

    // MARK: - Helpers shared

    struct FakeEventsProvider: CalendarEventsListProviding {
        var events: [CalendarEventItem]
        func listEvents(start: Date, end: Date, calendarId: String?, calendarTitle: String?, limit: Int) throws -> [CalendarEventItem] { events }
    }

    struct FakeCreateProvider: CalendarEventCreateProviding {
        var willReturn: CalendarEventItem
        func createEvent(title: String, start: Date, end: Date, allDay: Bool, notes: String?, location: String?, calendarId: String?, calendarTitle: String?) throws -> CalendarEventItem { willReturn }
    }

    func sampleEvent() -> CalendarEventItem {
        CalendarEventItem(id: "sample", title: "Sample", start: "2026-01-01T10:00:00Z", end: "2026-01-01T11:00:00Z", all_day: false, calendar_id: "cal1", calendar_title: "Home", notes: nil, location: nil)
    }

    struct MockCalAuth: CalendarAuthorizationProviding {
        var status: CalendarAuthorizationStatus
        func authorizationStatus() -> CalendarAuthorizationStatus { status }
        func requestFullAccess() throws -> Bool { false }
    }

    // Isolation: only ContactsAuthorizationProvider.swift should call requestAccess(for: .contacts)
    func testOnlyContactsAuthorizationProviderCallsRequestAccessForContacts() throws {
        let fm = FileManager.default
        var cur = URL(fileURLWithPath: fm.currentDirectoryPath)
        var dirs: [URL] = []
        for _ in 0..<10 {
            let candCore = cur.appendingPathComponent("Sources/ReynaCLIHostCore")
            if fm.fileExists(atPath: candCore.path) { dirs.append(candCore); break }
            let cand = cur.appendingPathComponent("native/ReynaCLIHost/Sources/ReynaCLIHostCore")
            if fm.fileExists(atPath: cand.path) { dirs.append(cand); break }
            cur = cur.deletingLastPathComponent()
        }
        guard let srcDir = dirs.first else {
            XCTFail("Could not find ReynaCLIHostCore sources"); return
        }
        let files = (try? fm.contentsOfDirectory(at: srcDir, includingPropertiesForKeys: nil)) ?? []
        var hits: [String] = []
        for file in files where file.pathExtension == "swift" {
            guard let content = try? String(contentsOf: file) else { continue }
            if content.contains("requestAccess(for:") && file.lastPathComponent != "ContactsAuthorizationProvider.swift" {
                // Calendar provider calls requestFullAccessToEvents – not contacts
                if content.contains(".contacts") || content.contains("CNContact") {
                    hits.append(file.lastPathComponent)
                }
            }
        }
        XCTAssertTrue(hits.isEmpty, "Only ContactsAuthorizationProvider.swift should call requestAccess(for: .contacts), found extras: \(hits)")
    }
}