pragma Singleton

// ─────────────────────────────────────────────────────────────────────────────
// How much of the Claude subscription this account has used.
//
// The collector writes one display-ready record and this only ever reads it.
// That split is the point: adding a second agent later is a collector, not a
// change here or in the widget, and nothing in QML ever sees a credential.
//
// The record carries its own status, so this can tell the three cases apart:
// the collector has never run, it ran and the session was stale, or it has
// real numbers. The widget hides for the first two, which is right -- a bar
// indicator that says "unknown" is worse than an empty space.
// ─────────────────────────────────────────────────────────────────────────────

import Quickshell
import Quickshell.Io
import QtQuick
import qs.config

Singleton {
    id: root

    // "ok" | "stale" | "unavailable" | "" (never collected)
    property string status: ""
    property string detail: ""

    // Percentages, 0-100, or -1 when the endpoint did not report one.
    property int fiveHourUsed: -1
    property int weekUsed: -1
    property string weekResetsAt: ""
    property string tier: ""

    readonly property bool available: root.status === "ok"
        && (root.fiveHourUsed >= 0 || root.weekUsed >= 0)

    // The number worth showing when there is only room for one: whichever
    // window is closer to its limit is the one about to interrupt you.
    readonly property int headline: Math.max(root.fiveHourUsed, root.weekUsed)

    readonly property string helperPath: Quickshell.shellDir + "/scripts/panama-agent-usage"
    readonly property string statePath:
        (Quickshell.env("XDG_STATE_HOME") || `${Quickshell.env("HOME")}/.local/state`)
        + "/panama/agent-usage.json"

    // Minutes, never a repaint. Usage moves slowly and the collector makes a
    // network call; anything faster would be spending someone's battery to
    // watch a number that changes a few times an hour.
    Timer {
        interval: 5 * 60 * 1000
        running: Settings.showAgentUsage
        repeat: true
        triggeredOnStart: true
        onTriggered: collect.running = true
    }

    Process {
        id: collect
        command: [root.helperPath]
        onExited: record.reload()
    }

    FileView {
        id: record
        path: root.statePath
        printErrors: false
        watchChanges: true
        onFileChanged: this.reload()
        onLoaded: {
            try {
                const parsed = JSON.parse(this.text());
                root.status = String(parsed.status ?? "");
                root.detail = String(parsed.detail ?? "");
                const usage = parsed.usage;
                if (usage) {
                    root.fiveHourUsed = Number.isFinite(usage.fiveHour?.used)
                        ? usage.fiveHour.used : -1;
                    root.weekUsed = Number.isFinite(usage.week?.used)
                        ? usage.week.used : -1;
                    root.weekResetsAt = String(usage.week?.resetsAt ?? "");
                    root.tier = String(usage.tier ?? "");
                } else {
                    root.fiveHourUsed = -1;
                    root.weekUsed = -1;
                }
            } catch (error) {
                root.status = "";
            }
        }
        onLoadFailed: root.status = "";
    }
}