import ClawdisIPC
import Foundation
import OSLog

enum ControlRequestHandler {
    static func process(
        request: Request,
        notifier: NotificationManager = NotificationManager(),
        logger: Logger = Logger(subsystem: "com.steipete.clawdis", category: "control")) async throws -> Response
    {
        let paused = await MainActor.run { AppStateStore.isPausedFlag }
        if paused {
            return Response(ok: false, message: "clawdis paused")
        }
        let canvasEnabled = await MainActor.run { AppStateStore.canvasEnabled }

        switch request {
        case let .notify(title, body, sound, priority, delivery):
            let chosenSound = sound?.trimmingCharacters(in: .whitespacesAndNewlines)
            let chosenDelivery = delivery ?? .system

            switch chosenDelivery {
            case .system:
                let ok = await notifier.send(title: title, body: body, sound: chosenSound, priority: priority)
                return ok ? Response(ok: true) : Response(ok: false, message: "notification not authorized")

            case .overlay:
                await MainActor.run {
                    NotifyOverlayController.shared.present(title: title, body: body)
                }
                return Response(ok: true)

            case .auto:
                let ok = await notifier.send(title: title, body: body, sound: chosenSound, priority: priority)
                if ok { return Response(ok: true) }
                await MainActor.run {
                    NotifyOverlayController.shared.present(title: title, body: body)
                }
                return Response(ok: true, message: "notification not authorized; used overlay")
            }

        case let .ensurePermissions(caps, interactive):
            let statuses = await PermissionManager.ensure(caps, interactive: interactive)
            let missing = statuses.filter { !$0.value }.map(\.key.rawValue)
            let ok = missing.isEmpty
            let msg = ok ? "all granted" : "missing: \(missing.joined(separator: ","))"
            return Response(ok: ok, message: msg)

        case .status:
            return Response(ok: true, message: "ready")

        case .rpcStatus:
            let result = await AgentRPC.shared.status()
            return Response(ok: result.ok, message: result.error)

        case let .screenshot(displayID, windowID, _):
            let authorized = await PermissionManager
                .ensure([.screenRecording], interactive: false)[.screenRecording] ?? false
            guard authorized else { return Response(ok: false, message: "screen recording permission missing") }
            if let data = await Screenshotter.capture(displayID: displayID, windowID: windowID) {
                return Response(ok: true, payload: data)
            }
            return Response(ok: false, message: "screenshot failed")

        case let .runShell(command, cwd, env, timeoutSec, needsSR):
            if needsSR {
                let authorized = await PermissionManager
                    .ensure([.screenRecording], interactive: false)[.screenRecording] ?? false
                guard authorized else { return Response(ok: false, message: "screen recording permission missing") }
            }
            return await ShellExecutor.run(command: command, cwd: cwd, env: env, timeout: timeoutSec)

        case let .agent(message, thinking, session, deliver, to):
            let trimmed = message.trimmingCharacters(in: .whitespacesAndNewlines)
            guard !trimmed.isEmpty else { return Response(ok: false, message: "message empty") }
            let sessionKey = session ?? "main"
            let rpcResult = await AgentRPC.shared.send(
                text: trimmed,
                thinking: thinking,
                sessionKey: sessionKey,
                deliver: deliver,
                to: to,
                channel: nil)
            return rpcResult.ok
                ? Response(ok: true, message: rpcResult.text ?? "sent")
                : Response(ok: false, message: rpcResult.error ?? "failed to send")

        case let .canvasShow(session, path, placement):
            guard canvasEnabled else {
                return Response(ok: false, message: "Canvas disabled by user")
            }
            do {
                let dir = try await MainActor.run { try CanvasManager.shared.show(
                    sessionKey: session,
                    path: path,
                    placement: placement) }
                return Response(ok: true, message: dir)
            } catch {
                return Response(ok: false, message: error.localizedDescription)
            }

        case let .canvasHide(session):
            await MainActor.run { CanvasManager.shared.hide(sessionKey: session) }
            return Response(ok: true)

        case let .canvasGoto(session, path, placement):
            guard canvasEnabled else {
                return Response(ok: false, message: "Canvas disabled by user")
            }
            do {
                try await MainActor.run { try CanvasManager.shared.goto(
                    sessionKey: session,
                    path: path,
                    placement: placement) }
                return Response(ok: true)
            } catch {
                return Response(ok: false, message: error.localizedDescription)
            }

        case let .canvasEval(session, javaScript):
            guard canvasEnabled else {
                return Response(ok: false, message: "Canvas disabled by user")
            }
            do {
                let result = try await CanvasManager.shared.eval(sessionKey: session, javaScript: javaScript)
                return Response(ok: true, payload: Data(result.utf8))
            } catch {
                return Response(ok: false, message: error.localizedDescription)
            }

        case let .canvasSnapshot(session, outPath):
            guard canvasEnabled else {
                return Response(ok: false, message: "Canvas disabled by user")
            }
            do {
                let path = try await CanvasManager.shared.snapshot(sessionKey: session, outPath: outPath)
                return Response(ok: true, message: path)
            } catch {
                return Response(ok: false, message: error.localizedDescription)
            }

        case .nodeList:
            let ids = await BridgeServer.shared.connectedNodeIds()
            let payload = (try? JSONSerialization.data(
                withJSONObject: ["connectedNodeIds": ids],
                options: [.prettyPrinted]))
                .flatMap { String(data: $0, encoding: .utf8) }
                ?? "{}"
            return Response(ok: true, payload: Data(payload.utf8))

        case let .nodeInvoke(nodeId, command, paramsJSON):
            do {
                let res = try await BridgeServer.shared.invoke(nodeId: nodeId, command: command, paramsJSON: paramsJSON)
                if res.ok {
                    let payload = res.payloadJSON ?? ""
                    return Response(ok: true, payload: Data(payload.utf8))
                }
                let errText = res.error?.message ?? "node invoke failed"
                return Response(ok: false, message: errText)
            } catch {
                return Response(ok: false, message: error.localizedDescription)
            }
        }
    }
}