pragma Singleton
pragma ComponentBehavior: Bound

import QtQuick
import Quickshell
import Quickshell.Io
import Quickshell.Bluetooth

Singleton {
    id: root

    readonly property BluetoothAdapter adapter: Bluetooth.defaultAdapter
    readonly property bool available: adapter !== null
    readonly property bool enabled: (adapter && adapter.enabled) ?? false
    readonly property bool discovering: (adapter
                                         && adapter.discovering) ?? false
    readonly property var devices: adapter ? adapter.devices : null
    readonly property var pairedDevices: {
        if (!adapter || !adapter.devices)
        return []

        return adapter.devices.values.filter(dev => {
                                                 return dev && (dev.paired
                                                                || dev.trusted)
                                             })
    }
    readonly property var allDevicesWithBattery: {
        if (!adapter || !adapter.devices)
        return []

        return adapter.devices.values.filter(dev => {
                                                 return dev
                                                 && dev.batteryAvailable
                                                 && dev.battery > 0
                                             })
    }

    function sortDevices(devices) {
        return devices.sort((a, b) => {
                                var aName = a.name || a.deviceName || ""
                                var bName = b.name || b.deviceName || ""

                                var aHasRealName = aName.includes(" ")
                                && aName.length > 3
                                var bHasRealName = bName.includes(" ")
                                && bName.length > 3

                                if (aHasRealName && !bHasRealName)
                                return -1
                                if (!aHasRealName && bHasRealName)
                                return 1

                                var aSignal = (a.signalStrength !== undefined
                                               && a.signalStrength > 0) ? a.signalStrength : 0
                                var bSignal = (b.signalStrength !== undefined
                                               && b.signalStrength > 0) ? b.signalStrength : 0
                                return bSignal - aSignal
                            })
    }

    function getDeviceIcon(device) {
        if (!device)
            return "bluetooth"

        var name = (device.name || device.deviceName || "").toLowerCase()
        var icon = (device.icon || "").toLowerCase()
        if (icon.includes("headset") || icon.includes("audio") || name.includes(
                    "headphone") || name.includes("airpod") || name.includes(
                    "headset") || name.includes("arctis"))
            return "headset"

        if (icon.includes("mouse") || name.includes("mouse"))
            return "mouse"

        if (icon.includes("keyboard") || name.includes("keyboard"))
            return "keyboard"

        if (icon.includes("phone") || name.includes("phone") || name.includes(
                    "iphone") || name.includes("android") || name.includes(
                    "samsung"))
            return "smartphone"

        if (icon.includes("watch") || name.includes("watch"))
            return "watch"

        if (icon.includes("speaker") || name.includes("speaker"))
            return "speaker"

        if (icon.includes("display") || name.includes("tv"))
            return "tv"

        return "bluetooth"
    }

    function canConnect(device) {
        if (!device)
            return false

        return !device.paired && !device.pairing && !device.blocked
    }

    function getSignalStrength(device) {
        if (!device || device.signalStrength === undefined
                || device.signalStrength <= 0)
            return "Unknown"

        var signal = device.signalStrength
        if (signal >= 80)
            return "Excellent"

        if (signal >= 60)
            return "Good"

        if (signal >= 40)
            return "Fair"

        if (signal >= 20)
            return "Poor"

        return "Very Poor"
    }

    function getSignalIcon(device) {
        if (!device || device.signalStrength === undefined
                || device.signalStrength <= 0)
            return "signal_cellular_null"

        var signal = device.signalStrength
        if (signal >= 80)
            return "signal_cellular_4_bar"

        if (signal >= 60)
            return "signal_cellular_3_bar"

        if (signal >= 40)
            return "signal_cellular_2_bar"

        if (signal >= 20)
            return "signal_cellular_1_bar"

        return "signal_cellular_0_bar"
    }

    function isDeviceBusy(device) {
        if (!device)
            return false
        return device.pairing
                || device.state === BluetoothDeviceState.Disconnecting
                || device.state === BluetoothDeviceState.Connecting
    }

    function connectDeviceWithTrust(device) {
        if (!device)
            return

        device.trusted = true
        device.connect()
    }

    function getCardName(device) {
        if (!device)
            return ""
        return "bluez_card." + device.address.replace(/:/g, "_")
    }

    function isAudioDevice(device) {
        if (!device)
            return false
        let icon = getDeviceIcon(device)
        return icon === "headset" || icon === "speaker"
    }

    function getCodecInfo(codecName) {
        let codec = codecName.replace(/-/g, "_").toUpperCase()
        
        let codecMap = {
            "LDAC": {
                name: "LDAC",
                description: "Highest quality • Higher battery usage",
                qualityColor: "#4CAF50"
            },
            "APTX_HD": {
                name: "aptX HD",
                description: "High quality • Balanced battery",
                qualityColor: "#FF9800"
            },
            "APTX": {
                name: "aptX",
                description: "Good quality • Low latency",
                qualityColor: "#FF9800"
            },
            "AAC": {
                name: "AAC",
                description: "Balanced quality and battery",
                qualityColor: "#2196F3"
            },
            "SBC_XQ": {
                name: "SBC-XQ",
                description: "Enhanced SBC • Better compatibility",
                qualityColor: "#2196F3"
            },
            "SBC": {
                name: "SBC",
                description: "Basic quality • Universal compatibility",
                qualityColor: "#9E9E9E"
            },
            "MSBC": {
                name: "mSBC",
                description: "Modified SBC • Optimized for speech",
                qualityColor: "#9E9E9E"
            },
            "CVSD": {
                name: "CVSD",
                description: "Basic speech codec • Legacy compatibility",
                qualityColor: "#9E9E9E"
            }
        }

        return codecMap[codec] || {
            name: codecName,
            description: "Unknown codec",
            qualityColor: "#9E9E9E"
        }
    }
    
    property var deviceCodecs: ({})
    
    function updateDeviceCodec(deviceAddress, codec) {
        deviceCodecs[deviceAddress] = codec
        deviceCodecsChanged()
    }
    
    function refreshDeviceCodec(device) {
        if (!device || !device.connected || !isAudioDevice(device)) {
            return
        }
        
        let cardName = getCardName(device)
        codecQueryProcess.cardName = cardName
        codecQueryProcess.deviceAddress = device.address
        codecQueryProcess.availableCodecs = []
        codecQueryProcess.parsingTargetCard = false
        codecQueryProcess.detectedCodec = ""
        codecQueryProcess.running = true
    }
    
    function getCurrentCodec(device, callback) {
        if (!device || !device.connected || !isAudioDevice(device)) {
            callback("")
            return
        }
        
        let cardName = getCardName(device)
        codecQueryProcess.cardName = cardName
        codecQueryProcess.callback = callback
        codecQueryProcess.availableCodecs = []
        codecQueryProcess.parsingTargetCard = false
        codecQueryProcess.detectedCodec = ""
        codecQueryProcess.running = true
    }
    
    function getAvailableCodecs(device, callback) {
        if (!device || !device.connected || !isAudioDevice(device)) {
            callback([], "")
            return
        }
        
        let cardName = getCardName(device)
        codecFullQueryProcess.cardName = cardName
        codecFullQueryProcess.callback = callback
        codecFullQueryProcess.availableCodecs = []
        codecFullQueryProcess.parsingTargetCard = false
        codecFullQueryProcess.detectedCodec = ""
        codecFullQueryProcess.running = true
    }
    
    function switchCodec(device, profileName, callback) {
        if (!device || !isAudioDevice(device)) {
            callback(false, "Invalid device")
            return
        }
        
        let cardName = getCardName(device)
        codecSwitchProcess.cardName = cardName
        codecSwitchProcess.profile = profileName
        codecSwitchProcess.callback = callback
        codecSwitchProcess.running = true
    }
    
    Process {
        id: codecQueryProcess
        
        property string cardName: ""
        property string deviceAddress: ""
        property var callback: null
        property bool parsingTargetCard: false
        property string detectedCodec: ""
        property var availableCodecs: []
        
        command: ["pactl", "list", "cards"]
        
        onExited: function(exitCode, exitStatus) {
            if (exitCode === 0 && detectedCodec) {
                if (deviceAddress) {
                    root.updateDeviceCodec(deviceAddress, detectedCodec)
                }
                if (callback) {
                    callback(detectedCodec)
                }
            } else if (callback) {
                callback("")
            }
            
            parsingTargetCard = false
            detectedCodec = ""
            availableCodecs = []
            deviceAddress = ""
            callback = null
        }
        
        stdout: SplitParser {
            splitMarker: "\n"
            onRead: (data) => {
                let line = data.trim()
                
                if (line.includes(`Name: ${codecQueryProcess.cardName}`)) {
                    codecQueryProcess.parsingTargetCard = true
                    return
                }
                
                if (codecQueryProcess.parsingTargetCard && line.startsWith("Name: ") && !line.includes(codecQueryProcess.cardName)) {
                    codecQueryProcess.parsingTargetCard = false
                    return
                }
                
                if (codecQueryProcess.parsingTargetCard) {
                    if (line.startsWith("Active Profile:")) {
                        let profile = line.split(": ")[1] || ""
                        let activeCodec = codecQueryProcess.availableCodecs.find((c) => {
                            return c.profile === profile
                        })
                        if (activeCodec) {
                            codecQueryProcess.detectedCodec = activeCodec.name
                        }
                        return
                    }
                    if (line.includes("codec") && line.includes("available: yes")) {
                        let parts = line.split(": ")
                        if (parts.length >= 2) {
                            let profile = parts[0].trim()
                            let description = parts[1]
                            let codecMatch = description.match(/codec ([^\)\s]+)/i)
                            let codecName = codecMatch ? codecMatch[1].toUpperCase() : "UNKNOWN"
                            let codecInfo = root.getCodecInfo(codecName)
                            if (codecInfo && !codecQueryProcess.availableCodecs.some((c) => {
                                return c.profile === profile
                            })) {
                                let newCodecs = codecQueryProcess.availableCodecs.slice()
                                newCodecs.push({
                                    "name": codecInfo.name,
                                    "profile": profile,
                                    "description": codecInfo.description,
                                    "qualityColor": codecInfo.qualityColor
                                })
                                codecQueryProcess.availableCodecs = newCodecs
                            }
                        }
                    }
                }
            }
        }
    }
    
    Process {
        id: codecFullQueryProcess
        
        property string cardName: ""
        property var callback: null
        property bool parsingTargetCard: false
        property string detectedCodec: ""
        property var availableCodecs: []
        
        command: ["pactl", "list", "cards"]
        
        onExited: function(exitCode, exitStatus) {
            if (callback) {
                callback(exitCode === 0 ? availableCodecs : [], exitCode === 0 ? detectedCodec : "")
            }
            parsingTargetCard = false
            detectedCodec = ""
            availableCodecs = []
            callback = null
        }
        
        stdout: SplitParser {
            splitMarker: "\n"
            onRead: (data) => {
                let line = data.trim()
                
                if (line.includes(`Name: ${codecFullQueryProcess.cardName}`)) {
                    codecFullQueryProcess.parsingTargetCard = true
                    return
                }
                
                if (codecFullQueryProcess.parsingTargetCard && line.startsWith("Name: ") && !line.includes(codecFullQueryProcess.cardName)) {
                    codecFullQueryProcess.parsingTargetCard = false
                    return
                }
                
                if (codecFullQueryProcess.parsingTargetCard) {
                    if (line.startsWith("Active Profile:")) {
                        let profile = line.split(": ")[1] || ""
                        let activeCodec = codecFullQueryProcess.availableCodecs.find((c) => {
                            return c.profile === profile
                        })
                        if (activeCodec) {
                            codecFullQueryProcess.detectedCodec = activeCodec.name
                        }
                        return
                    }
                    if (line.includes("codec") && line.includes("available: yes")) {
                        let parts = line.split(": ")
                        if (parts.length >= 2) {
                            let profile = parts[0].trim()
                            let description = parts[1]
                            let codecMatch = description.match(/codec ([^\)\s]+)/i)
                            let codecName = codecMatch ? codecMatch[1].toUpperCase() : "UNKNOWN"
                            let codecInfo = root.getCodecInfo(codecName)
                            if (codecInfo && !codecFullQueryProcess.availableCodecs.some((c) => {
                                return c.profile === profile
                            })) {
                                let newCodecs = codecFullQueryProcess.availableCodecs.slice()
                                newCodecs.push({
                                    "name": codecInfo.name,
                                    "profile": profile,
                                    "description": codecInfo.description,
                                    "qualityColor": codecInfo.qualityColor
                                })
                                codecFullQueryProcess.availableCodecs = newCodecs
                            }
                        }
                    }
                }
            }
        }
    }
    
    Process {
        id: codecSwitchProcess
        
        property string cardName: ""
        property string profile: ""
        property var callback: null
        
        command: ["pactl", "set-card-profile", cardName, profile]
        
        onExited: function(exitCode, exitStatus) {
            if (callback) {
                callback(exitCode === 0, exitCode === 0 ? "Codec switched successfully" : "Failed to switch codec")
            }
            
            // If successful, refresh the codec for this device
            if (exitCode === 0) {
                if (root.adapter && root.adapter.devices) {
                    root.adapter.devices.values.forEach(device => {
                        if (device && root.getCardName(device) === cardName) {
                            Qt.callLater(() => root.refreshDeviceCodec(device))
                        }
                    })
                }
            }
            
            callback = null
        }
    }
}