import QtQuick
import Quickshell
import Quickshell.Io
import "ClockModel.js" as Model

// Owns ~/.config/omarchy/clockbar.json: reads it, watches it, writes it back
// when the editor saves.
//
// The file is the source of truth in both directions — the editor writes it
// and the watcher picks the change straight back up, so a hand-edit and an
// edit through the popup are the same operation as far as the bar is
// concerned. That is what makes the two config routes impossible to
// desynchronise.
QtObject {
  id: root

  readonly property string home: Quickshell.env("HOME")
  readonly property string path: home + "/.config/omarchy/clockbar.json"

  property var config: defaults()
  property bool loaded: false
  // Set when the file on disk is present but unparseable. The bar keeps
  // rendering the last good config and says so, rather than emptying itself
  // and losing the user's clocks behind a stray comma.
  property string parseError: ""

  signal changed()

  function defaults() {
    return {
      version: 1,
      clocks: [
        { label: "LA", timezone: "America/Los_Angeles" },
        { label: "NYC", timezone: "America/New_York" },
        { label: "SG", timezone: "Asia/Singapore" },
        { label: "AUS", timezone: "Australia/Sydney" },
        { label: "NZ", timezone: "Pacific/Auckland" }
      ],
      workingHours: { start: 8, end: 18, workdays: [1, 2, 3, 4, 5] },
      dimOutsideWorkingHours: true,
      showSeconds: false,
      barSize: 0
    }
  }

  // Every field is coerced rather than trusted, so a half-finished hand-edit
  // degrades to the default for that one key instead of breaking the bar.
  function normalize(raw) {
    var base = defaults()
    if (!raw || typeof raw !== "object") return base

    var out = base
    if (Array.isArray(raw.clocks)) {
      var clocks = []
      for (var i = 0; i < raw.clocks.length; i++) {
        var entry = raw.clocks[i]
        if (!entry || typeof entry !== "object") continue
        var tz = String(entry.timezone || "").replace(/^\s+|\s+$/g, "")
        if (!tz) continue
        var label = String(entry.label === undefined || entry.label === null ? "" : entry.label).replace(/^\s+|\s+$/g, "")
        clocks.push({ label: label || tz, timezone: tz })
      }
      out.clocks = clocks
    }

    var wh = raw.workingHours
    if (wh && typeof wh === "object") {
      var start = Number(wh.start)
      var end = Number(wh.end)
      if (isFinite(start) && start >= 0 && start <= 24) out.workingHours.start = start
      if (isFinite(end) && end >= 0 && end <= 24) out.workingHours.end = end
      if (Array.isArray(wh.workdays)) {
        var days = []
        for (var d = 0; d < wh.workdays.length; d++) {
          var n = Number(wh.workdays[d])
          if (isFinite(n) && n >= 0 && n <= 6 && days.indexOf(n) === -1) days.push(n)
        }
        if (days.length) out.workingHours.workdays = days
      }
    }

    if (typeof raw.dimOutsideWorkingHours === "boolean") out.dimOutsideWorkingHours = raw.dimOutsideWorkingHours
    if (typeof raw.showSeconds === "boolean") out.showSeconds = raw.showSeconds
    var size = Number(raw.barSize)
    if (isFinite(size) && size >= 0 && size <= 200) out.barSize = size

    return out
  }

  // Applying what was read. This path NEVER writes.
  //
  // FileView can emit `loaded` more than once while starting up, and the early
  // emission can carry empty text before the read has actually landed. Seeding
  // defaults from that and saving them destroyed the real file — the user's
  // clocks were replaced by the stock five on the next shell restart. So an
  // empty or unparseable read now leaves both the file and the last good
  // config alone, and only a confirmed missing file seeds anything.
  function apply(raw) {
    var text = String(raw || "").replace(/^\s+|\s+$/g, "")
    if (!text) {
      root.loaded = true
      return
    }

    var parsed
    try {
      parsed = JSON.parse(text)
    } catch (e) {
      root.parseError = String(e.message || e)
      console.warn("clockbar: " + root.path + " is not valid JSON, keeping the last good config: " + root.parseError)
      root.loaded = true
      return
    }

    root.parseError = ""
    root.config = normalize(parsed)
    root.loaded = true
    root.changed()
  }

  // The one place defaults are written, and only when the file genuinely is
  // not there. A permissions error or an unknown failure must not be answered
  // by overwriting whatever is on disk.
  function seed() {
    root.config = defaults()
    root.parseError = ""
    root.loaded = true
    save(root.config)
  }

  function save(next) {
    var clean = normalize(next)
    root.config = clean
    file.setText(JSON.stringify(clean, null, 2) + "\n")
    root.parseError = ""
    root.changed()
  }

  property FileView file: FileView {
    path: root.path
    watchChanges: true
    atomicWrites: true
    printErrors: false
    onLoaded: root.apply(text())
    onLoadFailed: function (error) {
      if (error === FileViewError.FileNotFound) {
        // First run. Seed the file so the user has something to edit and so
        // the watcher has a real file to follow from here on.
        root.seed()
        return
      }
      console.warn("clockbar: could not read " + root.path + ": " + FileViewError.toString(error))
      root.loaded = true
    }
    onFileChanged: reload()
  }

  Component.onCompleted: Qt.callLater(function () { root.file.reload() })
}