import Foundation
import Testing

@testable import phbar

// MARK: - Config directory cascade
//
// `PHPaths` resolves the config root in priority order:
//   1. $XDG_CONFIG_HOME/phbar  (only for an absolute XDG path)
//   2. ~/.config/phbar
//   3. ~/.phbar

@Test func pathsCandidatesIncludeAbsoluteXdgFirst() {
	let home = FileManager.default.homeDirectoryForCurrentUser
	let candidates = PHPaths.configDirectoryCandidates(environment: ["XDG_CONFIG_HOME": "/custom/xdg"])

	#expect(candidates.count == 3)
	#expect(candidates[0].path == "/custom/xdg/phbar")
	#expect(candidates[1].path == home.appending(path: ".config/phbar").path)
	#expect(candidates[2].path == home.appending(path: ".phbar").path)
}

@Test func pathsCandidatesOmitRelativeXdg() {
	let home = FileManager.default.homeDirectoryForCurrentUser
	let candidates = PHPaths.configDirectoryCandidates(environment: ["XDG_CONFIG_HOME": "relative/path"])

	#expect(candidates.count == 2)
	#expect(candidates[0].path == home.appending(path: ".config/phbar").path)
	#expect(candidates[1].path == home.appending(path: ".phbar").path)
}

@Test func pathsCandidatesOmitEmptyXdg() {
	let candidates = PHPaths.configDirectoryCandidates(environment: ["XDG_CONFIG_HOME": ""])
	#expect(candidates.count == 2)
}

@Test func pathsCandidatesOmitXdgWhenUnset() {
	let candidates = PHPaths.configDirectoryCandidates(environment: [:])
	#expect(candidates.count == 2)
}

@Test func pathsResolvePicksFirstExistingCandidate() throws {
	// An existing XDG-rooted dir takes priority over ~/.config/phbar because
	// it sorts first in the candidate list.
	let xdgRoot = FileManager.default.temporaryDirectory.appending(path: "phbar_xdg_\(UUID().uuidString)")
	let xdgConfig = xdgRoot.appending(path: "phbar")
	try FileManager.default.createDirectory(at: xdgConfig, withIntermediateDirectories: true)
	defer { try? FileManager.default.removeItem(at: xdgRoot) }

	let resolved = PHPaths.resolveConfigDirectory(environment: ["XDG_CONFIG_HOME": xdgRoot.path])

	#expect(resolved == xdgConfig)
}

@Test func pathsConfigDirectoryMatchesResolve() {
	// The cached static agrees with a fresh resolve against the live process env.
	#expect(PHPaths.configDirectory == PHPaths.resolveConfigDirectory())
}