import AppKit
import Foundation

// Simple .properties loader with bundle defaults and user override support
final class Config {
    static let shared = Config()

    private var props: [String: String] = [:]

    private init() {
        // Defaults
        props = [
            "svc.host": "svc.prole.org",
            "svc.port": "443",
            "k3s.retropie.host": "retropie.prole.org",
            "k3s.retropie.port": "6443",
            "k3d.local.host": "localhost",
            "k3d.local.port": "6443"
        ]

        // Load bundled defaults if present
        if let url = Bundle.main.url(forResource: "prole", withExtension: "properties") {
            merge(loadProperties(url: url))
        }

        // Load user override from Application Support
        let fm = FileManager.default
        if let appSupport = try? fm.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false) {
            let dir = appSupport.appendingPathComponent("Prole", isDirectory: true)
            let url = dir.appendingPathComponent("prole.properties")
            if fm.fileExists(atPath: url.path) {
                merge(loadProperties(url: url))
            }
        }
    }

    private func merge(_ other: [String: String]) { for (k, v) in other { props[k] = v } }

    private func loadProperties(url: URL) -> [String: String] {
        guard let data = try? Data(contentsOf: url), let text = String(data: data, encoding: .utf8) else { return [:] }
        var result: [String: String] = [:]
        for line in text.components(separatedBy: .newlines) {
            let trimmed = line.trimmingCharacters(in: .whitespacesAndNewlines)
            if trimmed.isEmpty || trimmed.hasPrefix("#") { continue }
            if let eq = trimmed.firstIndex(of: "=") {
                let key = String(trimmed[..<eq]).trimmingCharacters(in: .whitespaces)
                let value = String(trimmed[trimmed.index(after: eq)...]).trimmingCharacters(in: .whitespaces)
                if !key.isEmpty { result[key] = value }
            }
        }
        return result
    }

    func string(_ key: String, default def: String) -> String { props[key] ?? def }
    func int(_ key: String, default def: Int) -> Int { Int(props[key] ?? "") ?? def }

    // Convenience accessors used by ServiceChecker/StatusView
    var svcHost: String { string("svc.host", default: "svc.prole.org") }
    var svcPort: Int { int("svc.port", default: 443) }

    var retropieHost: String { string("k3s.retropie.host", default: "retropie.prole.org") }
    var retropiePort: Int { int("k3s.retropie.port", default: 6443) }

    var localHost: String { string("k3d.local.host", default: "localhost") }
    var localPort: Int { int("k3d.local.port", default: 6443) }

    // UI background config was removed along with the splash screen.

    // Dev port-forward supervision
    var pfEnabled: Bool {
        let v = (props["pf.enabled"] ?? "").lowercased()
        return v == "1" || v == "true" || v == "yes" || v == "on"
    }

    // Background/foreground mode for port-forward launcher
    // Defaults to background to honor daemon-style commands.
    var pfModeBackground: Bool {
        let v = (props["pf.mode"] ?? "background").lowercased()
        // Allow synonyms
        if v == "bg" || v == "background" || v == "daemon" { return true }
        if v == "fg" || v == "foreground" { return false }
        return true
    }

    // Keepalive wrapper for port-forward commands. If true, a shell loop will
    // keep restarting the child command on exit and keep the wrapper process alive.
    // Default: true (so UI remains stable and processes behave like daemons).
    var pfKeepAlive: Bool {
        let v = (props["pf.keepalive"] ?? "true").lowercased()
        return v == "1" || v == "true" || v == "yes" || v == "on"
    }

    // Enable verbose debug logging for PortForwardManager and related startup.
    // Default: false. Set pf.debug=true to print detailed diagnostics.
    var pfDebug: Bool {
        let v = (props["pf.debug"] ?? "false").lowercased()
        return v == "1" || v == "true" || v == "yes" || v == "on"
    }

    // Discover and adopt already-running matching port-forward processes at startup/reset
    // Default: true
    var pfDiscovery: Bool {
        let v = (props["pf.discovery"] ?? "true").lowercased()
        return v == "1" || v == "true" || v == "yes" || v == "on"
    }

    // Adopt existing matching processes instead of launching duplicates
    // Default: true
    var pfAdoptExisting: Bool {
        let v = (props["pf.adoptExisting"] ?? "true").lowercased()
        return v == "1" || v == "true" || v == "yes" || v == "on"
    }

    // Optional kubeconfig path to export as KUBECONFIG for child processes
    var kubeconfigPath: String? {
        let v = (props["kubeconfig.path"] ?? "").trimmingCharacters(in: .whitespacesAndNewlines)
        return v.isEmpty ? nil : v
    }

    var pfCommands: [String] {
        // Collect keys pf.1, pf.2, ... in ascending order
        let keys = props.keys
            .filter { $0.hasPrefix("pf.") }
            .compactMap { k -> (Int, String)? in
                let tail = k.dropFirst(3)
                if let idx = Int(tail) { return (idx, k) }
                return nil
            }
            .sorted { $0.0 < $1.0 }
            .map { $0.1 }
        return keys.compactMap { props[$0] }
            .map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
            .filter { !$0.isEmpty }
    }
}