import Foundation
import Testing
@testable import OpenClaw

struct AgentOverviewRefreshGateTests {
    @Test func `new overview refresh invalidates an older result`() {
        var gate = AgentOverviewRefreshGate()

        let first = gate.begin()
        let second = gate.begin()

        #expect(!gate.isCurrent(first))
        #expect(gate.isCurrent(second))
    }

    @Test func `current overview refresh remains accepted until superseded`() {
        var gate = AgentOverviewRefreshGate()
        let generation = gate.begin()

        #expect(gate.isCurrent(generation))
    }

    @Test func `automatic refresh coalesces before invalidating current work`() throws {
        let source = try String(contentsOf: Self.gatewayDataSourceURL(), encoding: .utf8)
        let method = try #require(source.range(of: "func refreshOverview(force: Bool) async"))
        let tail = source[method.lowerBound...]
        let coalescingGuard = try #require(tail.range(of: "if self.overviewLoading, !force"))
        let generation = try #require(tail.range(of: "let generation = self.overviewRefreshGate.begin()"))

        #expect(coalescingGuard.lowerBound < generation.lowerBound)
    }

    private static func gatewayDataSourceURL() -> URL {
        URL(fileURLWithPath: #filePath)
            .deletingLastPathComponent()
            .deletingLastPathComponent()
            .appendingPathComponent("Sources/Design/AgentProTab+GatewayData.swift")
    }
}