import QtQuick
import QtQuick.Controls
import Quickshell.Io
import qs.Common
import qs.Widgets

Item {
    id: root
    
    property string currentLocation: ""
    property string placeholderText: "Search for a location..."
    
    signal locationSelected(string displayName, string coordinates)
    
    width: parent.width
    height: searchInputField.height + (searchDropdown.visible ? searchDropdown.height : 0)

    property bool _internalChange: false
    property bool isLoading: false
    property string helperTextState: "default" // "default", "prompt", "searching", "found", "not_found"
    property string currentSearchText: ""

    ListModel {
        id: searchResultsModel
    }

    function resetSearchState() {
        locationSearchTimer.stop()
        dropdownHideTimer.stop()
        if (locationSearcher.running) {
            locationSearcher.running = false;
        }
        isLoading = false
        searchResultsModel.clear()
        helperTextState = "default"
    }
    
    Timer {
        id: locationSearchTimer
        interval: 500
        running: false
        repeat: false
        onTriggered: {
            if (locationInput.text.length > 2) {
                if (locationSearcher.running) {
                    locationSearcher.running = false
                }
                
                searchResultsModel.clear()
                root.isLoading = true
                root.helperTextState = "searching"
                
                const searchLocation = locationInput.text
                root.currentSearchText = searchLocation
                const encodedLocation = encodeURIComponent(searchLocation)
                const curlCommand = `curl -s --connect-timeout 5 --max-time 10 'https://nominatim.openstreetmap.org/search?q=${encodedLocation}&format=json&limit=5&addressdetails=1'`
                
                locationSearcher.command = ["bash", "-c", curlCommand]
                locationSearcher.running = true
            }
        }
    }
    
    Timer {
        id: dropdownHideTimer
        interval: 200
        running: false
        repeat: false
        onTriggered: {
            if (!locationInput.getActiveFocus() && !searchDropdown.hovered) {
                root.resetSearchState()
            }
        }
    }

    Process {
        id: locationSearcher
        command: ["bash", "-c", "echo"]
        running: false
        
        stdout: StdioCollector {
            onStreamFinished: {
                if (root.currentSearchText !== locationInput.text) {
                    return
                }
                
                const raw = text.trim()
                root.isLoading = false
                searchResultsModel.clear()

                if (!raw || raw[0] !== "[") {
                    root.helperTextState = "not_found"
                    return
                }
                
                try {
                    const data = JSON.parse(raw)
                    if (data.length === 0) {
                        root.helperTextState = "not_found"
                        return
                    }
                    
                    for (let i = 0; i < Math.min(data.length, 5); i++) {
                        const location = data[i]
                        if (location.display_name && location.lat && location.lon) {
                            const parts = location.display_name.split(', ')
                            let cleanName = parts[0]
                            if (parts.length > 1) {
                                const state = parts[parts.length - 2]
                                if (state && state !== cleanName) {
                                    cleanName += `, ${state}`
                                }
                            }
                            const query = `${location.lat},${location.lon}`
                            searchResultsModel.append({ "name": cleanName, "query": query })
                        }
                    }
                    root.helperTextState = "found"
                } catch (e) {
                    root.helperTextState = "not_found"
                }
            }
        }
        
        onExited: (exitCode) => {
            root.isLoading = false
            if (exitCode !== 0) {
                searchResultsModel.clear()
                root.helperTextState = "not_found"
            }
        }
    }
    
    // Search input field
    Item {
        id: searchInputField
        width: parent.width
        height: 48
        
        DankTextField {
            id: locationInput
            width: parent.width
            height: parent.height
            leftIconName: "search"
            placeholderText: root.placeholderText
            text: root.currentLocation
            backgroundColor: Theme.surfaceVariant
            normalBorderColor: Qt.rgba(Theme.outline.r, Theme.outline.g, Theme.outline.b, 0.3)
            focusedBorderColor: Theme.primary
            
            onTextEdited: {
                if (root._internalChange) return
                if (getActiveFocus()) {
                    if (text.length > 2) {
                        root.isLoading = true
                        root.helperTextState = "searching"
                        locationSearchTimer.restart()
                    } else {
                        root.resetSearchState()
                        root.helperTextState = "prompt"
                    }
                }
            }
            
            onFocusStateChanged: (hasFocus) => {
                if (hasFocus) {
                    dropdownHideTimer.stop()
                    if (text.length <= 2) {
                        root.helperTextState = "prompt"
                    }
                }
                else {
                    dropdownHideTimer.start()
                }
            }
        }
        
        // Status icon overlay
        DankIcon {
            name: {
                if (root.isLoading) return "hourglass_empty"
                if (searchResultsModel.count > 0) return "check_circle"
                if (locationInput.getActiveFocus() && locationInput.text.length > 2 && !root.isLoading) return "error"
                return ""
            }
            size: Theme.iconSize - 4
            color: {
                if (root.isLoading) return Theme.surfaceVariantText
                if (searchResultsModel.count > 0) return Theme.success || Theme.primary
                if (locationInput.getActiveFocus() && locationInput.text.length > 2) return Theme.error
                return "transparent"
            }
            anchors.right: parent.right
            anchors.rightMargin: Theme.spacingM
            anchors.verticalCenter: parent.verticalCenter
            opacity: (locationInput.getActiveFocus() && locationInput.text.length > 2) ? 1.0 : 0.0
            
            Behavior on opacity {
                NumberAnimation {
                    duration: Theme.shortDuration
                    easing.type: Theme.standardEasing
                }
            }
        }
    }
    
    // Search results dropdown
    Rectangle {
        id: searchDropdown
        width: parent.width
        height: Math.min(Math.max(searchResultsModel.count * 38 + Theme.spacingS * 2, 50), 200)
        
        y: searchInputField.height
        radius: Theme.cornerRadius
        color: Theme.popupBackground()
        border.color: Qt.rgba(Theme.outline.r, Theme.outline.g, Theme.outline.b, 0.3)
        border.width: 1
        visible: locationInput.getActiveFocus() && locationInput.text.length > 2 && (searchResultsModel.count > 0 || root.isLoading)
        
        property bool hovered: false
        
        MouseArea {
            anchors.fill: parent
            hoverEnabled: true
            onEntered: {
                parent.hovered = true
                dropdownHideTimer.stop()
            }
            onExited: {
                parent.hovered = false
                if (!locationInput.getActiveFocus()) {
                    dropdownHideTimer.start()
                }
            }
            acceptedButtons: Qt.NoButton
        }
        
        Item {
            anchors.fill: parent
            anchors.margins: Theme.spacingS
            
            ListView {
                id: searchResultsList
                anchors.fill: parent
                clip: true
                model: searchResultsModel
                spacing: 2
                
                delegate: Rectangle {
                    width: searchResultsList.width
                    height: 36
                    radius: Theme.cornerRadius
                    color: resultMouseArea.containsMouse ? Qt.rgba(Theme.primary.r, Theme.primary.g, Theme.primary.b, 0.1) : "transparent"
                    
                    Row {
                        anchors.fill: parent
                        anchors.margins: Theme.spacingM
                        spacing: Theme.spacingS
                        
                        DankIcon {
                            name: "place"
                            size: Theme.iconSize - 6
                            color: Theme.surfaceVariantText
                            anchors.verticalCenter: parent.verticalCenter
                        }
                        
                        Text {
                            text: model.name || "Unknown"
                            font.pixelSize: Theme.fontSizeMedium
                            color: Theme.surfaceText
                            anchors.verticalCenter: parent.verticalCenter
                            elide: Text.ElideRight
                            width: parent.width - 30
                        }
                    }
                    
                    MouseArea {
                        id: resultMouseArea
                        anchors.fill: parent
                        hoverEnabled: true
                        cursorShape: Qt.PointingHandCursor
                        
                        onClicked: {
                            root._internalChange = true
                            const selectedName = model.name
                            const selectedQuery = model.query
                            
                            locationInput.text = selectedName
                            root.locationSelected(selectedName, selectedQuery)
                            
                            root.resetSearchState()
                            locationInput.setFocus(false)
                            root._internalChange = false
                        }
                    }
                }
            }
            
            // Show message when no results
            Text {
                anchors.centerIn: parent
                text: root.isLoading ? "Searching..." : "No locations found"
                font.pixelSize: Theme.fontSizeMedium
                color: Theme.surfaceVariantText
                visible: searchResultsList.count === 0 && locationInput.text.length > 2
            }
        }
    }
}