function parsePeers(peerMap) {
    if (!peerMap) return []
    return Object.keys(peerMap).map(function (key) {
        var p = peerMap[key]
        return {
            hostname: p.HostName || key,
            ip: (p.TailscaleIPs && p.TailscaleIPs.length) ? p.TailscaleIPs[0] : "",
            online: p.Online || false,
            exitNode: p.ExitNodeOption || false
        }
    })
}

function makeExitNodeCommand(hostname) {
    return ["tailscale", "set", "--exit-node=" + hostname]
}

function findActiveExitNode(peerMap) {
    if (!peerMap) return ""
    for (const key in peerMap) {
        const p = peerMap[key]
        if (p.ExitNode) {
            return p.HostName || key
        }
    }
    return ""
}

var safeClipboardCmds = ["dms cl copy", "wl-copy", "clipmanctl copy", "xclip -selection clipboard", "xsel --clipboard --input", "none"]

function validateClipboardCmd(cmd) {
    return typeof cmd === "string" && safeClipboardCmds.includes(cmd)
}

function buildCopyCommand(text, clipboardCmd) {
    if (!validateClipboardCmd(clipboardCmd)) return null
    var escaped = text.replace(/'/g, "'\\''")
    return ["sh", "-c", "printf '%s' '" + escaped + "' | " + clipboardCmd]
}

function parseStatusResult(jsonText) {
    try {
        const data = JSON.parse(jsonText)
        return {
            isConnected: data.BackendState === "Running",
            tailscaleIP: (data.Self && data.Self.TailscaleIPs && data.Self.TailscaleIPs[0]) || "",
            currentExitNode: findActiveExitNode(data.Peer || {}),
            peers: parsePeers(data.Peer || {})
        }
    } catch (e) {
        return { isConnected: false, tailscaleIP: "", currentExitNode: "", peers: [] }
    }
}

function buildToggleCommand(isConnected) {
    return isConnected ? ["tailscale", "down"] : ["tailscale", "up"]
}

function parseClipboardDetection(stdout) {
    var trimmed = typeof stdout === "string" ? stdout.trim() : ""
    return validateClipboardCmd(trimmed) ? trimmed : "none"
}

function errorMessage(cmd) {
    var messages = {
        "up": "Failed to connect to Tailscale",
        "connect": "Failed to connect to Tailscale",
        "down": "Failed to disconnect from Tailscale",
        "disconnect": "Failed to disconnect from Tailscale",
        "set": "Failed to set exit node",
        "status": "Failed to read Tailscale status"
    }
    return messages[cmd] || "Tailscale command failed"
}

// CommonJS export for Node.js tests (ignored by QML)
if (typeof module !== "undefined" && module.exports) {
    module.exports = { parsePeers, makeExitNodeCommand, findActiveExitNode, errorMessage, validateClipboardCmd, buildCopyCommand, parseClipboardDetection, buildToggleCommand, parseStatusResult }
}