import XCTest
@testable import AIMenubarUsage

final class ClaudeProviderTests: XCTestCase {
    func testDecodeOAuthUsageFixture() throws {
        let data = try loadFixture(named: "claude-oauth-usage")
        let usage = try JSONDecoder().decode(ClaudeOAuthUsageResponse.self, from: data)

        XCTAssertEqual(usage.fiveHour?.utilization ?? 0, 0.42, accuracy: 0.001)
        XCTAssertEqual(usage.sevenDay?.utilization ?? 0, 0.15, accuracy: 0.001)
    }

    func testSnapshotMapping() throws {
        let data = try loadFixture(named: "claude-oauth-usage")
        let usage = try JSONDecoder().decode(ClaudeOAuthUsageResponse.self, from: data)
        let snapshot = ClaudeAPI.snapshot(from: usage, fetchedAt: Date(), isStale: false)

        XCTAssertEqual(snapshot.providerID, .claude)
        XCTAssertEqual(snapshot.formatted(.claudeFiveHourUtilization), "42%")
        XCTAssertEqual(snapshot.formatted(.claudeSevenDayUtilization), "15%")
    }

    private func loadFixture(named name: String) throws -> Data {
        let url = URL(fileURLWithPath: #filePath)
            .deletingLastPathComponent()
            .appendingPathComponent("Fixtures")
            .appendingPathComponent("\(name).json")
        return try Data(contentsOf: url)
    }
}