// Applications and session startup.

import Quickshell
import QtQuick
import qs.services

SettingsPage {
    id: root

    objectName: "applications"
    title: "Applications"
    lede: "Choose what opens your files and links, and what starts with your session."

    property string expandedRole: ""
    readonly property var applications: DesktopEntries.applications.values
    readonly property var roles: [
        { key: "browser", label: "Browser", detail: "Web links and HTML pages", categorySets: [["webbrowser"]], terms: ["web browser", "browser"] },
        { key: "mail", label: "Mail", detail: "Email links", categorySets: [["email"]], terms: ["mail client", "email client"] },
        { key: "files", label: "Files", detail: "Folders and file locations", categorySets: [["filemanager"]], terms: ["file manager"] },
        { key: "terminal", label: "Terminal", detail: "Terminal links and command-line handoffs", categorySets: [["terminalemulator"]], terms: ["terminal emulator", "terminal"] },
        { key: "music", label: "Music", detail: "MP3 audio", categorySets: [["music"], ["audio", "player"]], terms: ["music player", "audio player"] },
        { key: "images", label: "Images", detail: "PNG images", categorySets: [], terms: ["image viewer", "image editor", "photo viewer", "photo editor", "picture viewer"] },
        { key: "video", label: "Video", detail: "MP4 video", categorySets: [["video"]], terms: ["video player", "movie player"] }
    ]

    function desktopId(entry: var): string {
        const entryId = String(entry?.id ?? "");
        return entryId.endsWith(".desktop") ? entryId : entryId + ".desktop";
    }

    function displayName(entry: var): string {
        return String(entry?.name || entry?.genericName || root.desktopId(entry));
    }

    function currentHandler(role: string): string {
        return String(DefaultApps.handlers[role] ?? "");
    }

    function currentEntry(role: string): var {
        const handler = root.currentHandler(role);
        return root.applications.find(entry => root.desktopId(entry) === handler) ?? null;
    }

    function matchesRole(entry: var, role: var): bool {
        const rawCategories = Array.isArray(entry.categories)
            ? entry.categories
            : [String(entry.categories ?? "")];
        const categories = [];
        for (const rawCategory of rawCategories) {
            for (const value of String(rawCategory).split(";")) {
                const category = value.trim().toLowerCase();
                if (category !== "")
                    categories.push(category);
            }
        }
        const metadata = [entry.name, entry.genericName]
            .map(value => String(value ?? "").toLowerCase())
            .join(" ");
        return role.categorySets.some(set => set.every(category => categories.includes(category)))
            || role.terms.some(term => metadata.includes(term));
    }

    function choicesForRole(role: var): var {
        const choices = root.applications.filter(entry => root.matchesRole(entry, role));
        const currentEntry = root.currentEntry(role.key);
        if (currentEntry && !choices.some(entry => root.desktopId(entry) === root.desktopId(currentEntry)))
            choices.push(currentEntry);
        return choices.sort((left, right) => root.displayName(left).localeCompare(root.displayName(right)));
    }

    TextRow {
        visible: DefaultApps.lastError !== ""
        label: "Application settings need attention"
        detail: DefaultApps.lastError
        value: ""
        divider: false
    }

    SettingsCard {
        title: "Default applications"
        subtitle: "Open a row to choose from applications that advertise the matching role."

        Repeater {
            model: root.roles

            delegate: Column {
                id: roleBlock

                required property var modelData
                required property int index
                readonly property var choices: root.choicesForRole(roleBlock.modelData)
                readonly property var selectedEntry: root.currentEntry(roleBlock.modelData.key)

                width: parent.width

                SettingRow {
                    label: roleBlock.modelData.label
                    detail: roleBlock.modelData.detail
                    value: DefaultApps.busy ? "Loading…" : (
                        roleBlock.selectedEntry
                            ? root.displayName(roleBlock.selectedEntry)
                            : (root.currentHandler(roleBlock.modelData.key) || "Not set")
                    )
                    activatable: roleBlock.choices.length > 0 && !DefaultApps.busy
                    divider: root.expandedRole !== roleBlock.modelData.key && roleBlock.index < root.roles.length - 1
                    onActivated: {
                        root.expandedRole = root.expandedRole === roleBlock.modelData.key
                            ? ""
                            : roleBlock.modelData.key;
                    }
                }

                Column {
                    width: parent.width
                    visible: root.expandedRole === roleBlock.modelData.key

                    Repeater {
                        model: roleBlock.choices

                        delegate: SettingRow {
                            id: candidateRow

                            required property var modelData
                            required property int index

                            readonly property string candidateId: root.desktopId(candidateRow.modelData)
                            readonly property bool selected: candidateRow.candidateId === root.currentHandler(roleBlock.modelData.key)

                            label: root.displayName(candidateRow.modelData)
                            detail: String(candidateRow.modelData.genericName || candidateRow.modelData.comment || candidateRow.candidateId)
                            value: candidateRow.selected ? "Current" : ""
                            activatable: !candidateRow.selected && !DefaultApps.busy
                            divider: candidateRow.index < roleBlock.choices.length - 1 || roleBlock.index < root.roles.length - 1
                            onActivated: {
                                DefaultApps.setDefault(roleBlock.modelData.key, candidateRow.candidateId);
                                root.expandedRole = "";
                            }
                        }
                    }
                }
            }
        }
    }

    // GNOME's Search panel, answered honestly.
    //
    // It configures which applications provide results in gnome-shell's
    // overview and which folders are indexed. gnome-shell does not run here,
    // so those settings would do nothing. Under Panama searching is the
    // launcher's job, and Vicinae carries its own preferences -- reimplementing
    // them here would give two places to change one thing.
    SettingsCard {
        title: "Search"
        subtitle: "Applications, files, the calculator, clipboard history, emoji, and open windows are all searched from the launcher."

        TextRow {
            label: "Launcher"
            detail: SystemSettings.vicinaeActive
                ? "Running as a user service"
                : "Not running — Super+Shift+R opens the fallback launcher"
            value: "Vicinae"
        }

        TextRow {
            label: "Open search"
            detail: "Three keys open it, because Super+A and Super+R were GNOME's app grid and run dialog"
            value: "Super+Space"
        }

        ActionRow {
            label: "Change these shortcuts"
            detail: "Every launcher chord is rebindable, including clipboard history and emoji"
            action: "Open keyboard"
            divider: false
            onTriggered: ShellState.openSettings("shortcuts")
        }
    }

    SettingsCard {
        title: "User autostart"
        subtitle: "These desktop entries live in your user configuration. Select a row to toggle it."

        TextRow {
            visible: !DefaultApps.busy && DefaultApps.autostartEntries.length === 0
            label: "No user autostart entries"
            detail: "Applications can add entries to ~/.config/autostart."
            value: ""
            divider: false
        }

        Repeater {
            model: DefaultApps.autostartEntries

            delegate: SettingRow {
                id: autostartRow

                required property var modelData
                required property int index

                label: autostartRow.modelData.name
                detail: autostartRow.modelData.id
                value: autostartRow.modelData.enabled ? "Enabled" : "Disabled"
                activatable: !DefaultApps.busy
                divider: autostartRow.index < DefaultApps.autostartEntries.length - 1
                onActivated: DefaultApps.setAutostart(autostartRow.modelData.id, !autostartRow.modelData.enabled)
            }
        }
    }

    SettingsCard {
        title: "Compositor autostart"
        subtitle: "Panama starts these from Hyprland configuration. They are read-only here."

        TextRow {
            visible: !DefaultApps.busy && DefaultApps.luaAutostartEntries.length === 0
            label: "No compositor entries found"
            detail: "No hl.exec_cmd entries were found in config/dot/hypr/autostart.lua."
            value: ""
            divider: false
        }

        Repeater {
            model: DefaultApps.luaAutostartEntries

            delegate: TextRow {
                id: luaRow

                required property var modelData
                required property int index

                label: luaRow.modelData.name
                detail: luaRow.modelData.command
                value: "Hyprland"
                divider: luaRow.index < DefaultApps.luaAutostartEntries.length - 1
            }
        }
    }

    SettingsCard {
        title: "Refresh"

        ActionRow {
            label: "Reload application settings"
            detail: "Re-read desktop entries, defaults, and user autostart files"
            action: DefaultApps.busy ? "Refreshing…" : "Refresh"
            enabled: !DefaultApps.busy
            divider: false
            onTriggered: DefaultApps.refresh()
        }
    }
}