.pragma library

// Pure helpers for the Stream Deck panel. Kept out of the QML so the parsing and
// formatting rules can be reasoned about (and changed) without touching layout.

var EMPTY_STATUS = {
  ok: false,
  configPath: "",
  modulesPath: "",
  iconsDir: "",
  brightness: 0,
  configError: "",
  daemon: { unit: "", active: false, enabled: false, state: "unknown", sub: "", sinceSec: 0 },
  device: { connected: false, known: false, model: "", keyCount: 0, cols: 0, rows: 0 },
  keys: [],
  icons: [],
  modules: [],
  warnings: []
}

// parseStatus turns streamdeck-ctl's stdout into a status object, filling in
// anything the CLI omitted so bindings never dereference undefined.
function parseStatus(raw) {
  var parsed
  try {
    parsed = JSON.parse(String(raw || ""))
  } catch (e) {
    return { ok: false, error: "Could not parse streamdeck-ctl output" }
  }
  if (!parsed || typeof parsed !== "object") {
    return { ok: false, error: "Unexpected streamdeck-ctl output" }
  }

  var status = {}
  for (var field in EMPTY_STATUS) status[field] = EMPTY_STATUS[field]
  for (var key in parsed) status[key] = parsed[key]

  status.daemon = Object.assign({}, EMPTY_STATUS.daemon, parsed.daemon || {})
  status.device = Object.assign({}, EMPTY_STATUS.device, parsed.device || {})
  status.keys = parsed.keys || []
  status.icons = parsed.icons || []
  status.modules = parsed.modules || []
  status.warnings = parsed.warnings || []
  return status
}

// keySlots expands the sparse key list from the CLI into one entry per physical
// slot, so the grid can render empty positions without the view doing lookups.
function keySlots(status) {
  var cols = Number(status.device.cols) || 8
  var rows = Number(status.device.rows) || 4
  var count = Number(status.device.keyCount) || (cols * rows)

  var configured = {}
  for (var i = 0; i < status.keys.length; i++) {
    configured[Number(status.keys[i].index)] = status.keys[i]
  }

  var slots = []
  for (var index = 0; index < count; index++) {
    if (configured[index]) {
      // Copy rather than annotate — this library's helpers must not mutate the
      // status object they were handed.
      slots.push(Object.assign({ configured: true }, configured[index]))
    } else {
      slots.push({ index: index, configured: false, kind: "empty", label: "" })
    }
  }
  return slots
}

// statusLine is the one-line summary under the panel title.
function statusLine(status) {
  if (status.configError) return "Config error"
  if (!status.device.connected) return status.daemon.active ? "Waiting for deck" : "Deck disconnected"
  if (!status.daemon.active) return "Daemon stopped"
  var used = countConfigured(status)
  var total = Number(status.device.keyCount) || 0
  return used + " of " + total + " keys in use"
}

function countConfigured(status) {
  // Count only keys the connected device can actually show, so an XL config
  // against an MK.2 can't read "17 of 15 keys in use".
  var limit = Number(status.device.keyCount) || Infinity
  var used = 0
  for (var i = 0; i < status.keys.length; i++) {
    if (status.keys[i].kind !== "empty" && Number(status.keys[i].index) < limit) used++
  }
  return used
}

// deviceLine names the hardware, falling back to the raw USB IDs when the
// product ID isn't in the daemon's supported-models table.
function deviceLine(status) {
  if (status.device.known && status.device.model) return status.device.model
  if (status.device.productId) return "Unknown (" + status.device.productId + ")"
  return "Unknown"
}

function daemonLine(status) {
  var daemon = status.daemon
  if (daemon.active) {
    var uptime = formatDuration(Number(daemon.sinceSec) || 0)
    return uptime ? "Running · " + uptime : "Running"
  }
  if (daemon.state === "failed") return "Failed"
  if (daemon.state === "unknown") return "Not installed"
  return daemon.enabled ? "Stopped" : "Stopped (disabled)"
}

function formatDuration(seconds) {
  if (!seconds || seconds < 60) return seconds > 0 ? seconds + "s" : ""
  var minutes = Math.floor(seconds / 60)
  if (minutes < 60) return minutes + "m"
  var hours = Math.floor(minutes / 60)
  if (hours < 24) return hours + "h " + (minutes % 60) + "m"
  var days = Math.floor(hours / 24)
  return days + "d " + (hours % 24) + "h"
}

// kindGlyph maps a key kind to a Nerd Font glyph for the grid cell. Kinds come
// from streamdeck-ctl, so this list tracks KeyStatus.Kind in status.go.
function kindGlyph(kind) {
  switch (kind) {
  case "toggle": return "󰄣"  // toggle-switch
  case "module": return "󰅵"  // puzzle piece
  case "text":   return "󰉼"  // text
  case "static": return "󰃐"  // image
  default:       return ""
  }
}

// describeKey is the detail line shown when a grid cell is focused. Module keys
// show only module · function — their rendered command can inline secrets, so
// streamdeck-ctl no longer emits it at all.
function describeKey(key) {
  if (!key || !key.configured) return "Empty slot — click to configure"
  var parts = []
  if (key.module && key.function) parts.push(key.module + " · " + key.function)
  else if (key.command) parts.push(truncate(key.command, 70))
  if (key.poll) parts.push("polls every " + (key.poll.interval || "2s"))
  if (key.privileged) parts.push("privileged")
  return parts.length ? parts.join("  ·  ") : "No command"
}

function truncate(text, limit) {
  var value = String(text || "").replace(/\s+/g, " ").trim()
  return value.length > limit ? value.substring(0, limit - 1) + "…" : value
}

// gridLabel keeps cell text to something that fits an 8-column grid.
function gridLabel(key) {
  if (!key || !key.configured) return ""
  return truncate(key.label || "", 10)
}

// iconOptions builds the dropdown model for icon selection: "(none)" plus every
// image file the CLI found in icons_dir.
function iconOptions(status) {
  var options = [{ value: "", label: "(none)" }]
  for (var i = 0; i < status.icons.length; i++) {
    options.push({ value: status.icons[i], label: status.icons[i] })
  }
  return options
}

function moduleOptions(status) {
  var options = [{ value: "", label: "(no module)" }]
  for (var i = 0; i < status.modules.length; i++) {
    options.push({ value: status.modules[i].name, label: status.modules[i].name })
  }
  return options
}

function functionOptions(status, moduleName) {
  var options = [{ value: "", label: "(no function)" }]
  if (!moduleName) return options
  for (var i = 0; i < status.modules.length; i++) {
    if (status.modules[i].name !== moduleName) continue
    var functions = status.modules[i].functions || []
    for (var j = 0; j < functions.length; j++) {
      options.push({ value: functions[j].name, label: functions[j].name })
    }
  }
  return options
}

// functionParams returns the declared default params for a module function, used
// to seed the editor's parameter rows.
function functionParams(status, moduleName, functionName) {
  for (var i = 0; i < status.modules.length; i++) {
    if (status.modules[i].name !== moduleName) continue
    var functions = status.modules[i].functions || []
    for (var j = 0; j < functions.length; j++) {
      if (functions[j].name === functionName) return functions[j].params || {}
    }
  }
  return {}
}

// paramRows merges a function's declared defaults with the values already set on
// the key, so the editor shows every parameter the function accepts.
function paramRows(status, moduleName, functionName, current) {
  var defaults = functionParams(status, moduleName, functionName)
  var names = {}
  var name
  for (name in defaults) names[name] = true
  for (name in (current || {})) names[name] = true

  var ordered = Object.keys(names).sort()
  var rows = []
  for (var i = 0; i < ordered.length; i++) {
    name = ordered[i]
    var value = (current && current[name] !== undefined) ? current[name] : defaults[name]
    rows.push({
      name: name,
      value: value === undefined || value === null ? "" : String(value),
      placeholder: defaults[name] === undefined ? "" : String(defaults[name])
    })
  }
  return rows
}

// editorDraft snapshots a key into the flat shape the editor binds to.
function editorDraft(key) {
  return {
    index: key ? Number(key.index) : 0,
    icon: key && key.icon ? key.icon : "",
    text: key && key.text ? key.text : "",
    textColor: key && key.textColor ? key.textColor : "",
    command: key && key.command ? key.command : "",
    module: key && key.module ? key.module : "",
    function: key && key.function ? key.function : "",
    params: key && key.params ? shallowCopy(key.params) : {}
  }
}

function shallowCopy(source) {
  var copy = {}
  for (var name in source) copy[name] = source[name]
  return copy
}

// editArguments turns an editor draft into streamdeck-ctl `key set` flags.
// Fields the user emptied are passed as -unset so they leave the YAML entirely
// rather than lingering as empty strings.
function editArguments(draft, original) {
  var args = []

  function apply(flag, field, value) {
    var text = String(value || "").trim()
    var had = String((original && original[field]) || "").trim() !== ""
    if (text !== "") args.push(flag, text)
    else if (had) args.push("-unset", yamlField(field))
  }

  apply("-icon", "icon", draft.icon)
  apply("-text", "text", draft.text)
  apply("-text-color", "textColor", draft.textColor)
  apply("-command", "command", draft.command)
  apply("-module", "module", draft.module)
  apply("-function", "function", draft.function)

  // Params only travel with a module function; without one they have nothing to
  // substitute into, and the daemon would ignore them.
  if (String(draft.module || "").trim() !== "" && String(draft.function || "").trim() !== "") {
    var wrote = false
    for (var name in draft.params) {
      var value = draft.params[name]
      if (value === undefined || value === null) continue
      args.push("-param", name + "=" + value)
      wrote = true
    }
    if (!wrote && original && original.params && Object.keys(original.params).length > 0) {
      args.push("-unset", "params")
    }
  } else if (original && original.params && Object.keys(original.params).length > 0) {
    args.push("-unset", "params")
  }

  return args
}

// yamlField maps the editor's camelCase field names to the YAML keys the CLI's
// -unset flag expects.
function yamlField(field) {
  switch (field) {
  case "textColor": return "text_color"
  case "function": return "function"
  default: return field
  }
}

// draftDiffers reports whether the editor has unsaved changes.
function draftDiffers(draft, original) {
  var fields = ["icon", "text", "textColor", "command", "module", "function"]
  for (var i = 0; i < fields.length; i++) {
    var field = fields[i]
    if (String(draft[field] || "") !== String(original[field] || "")) return true
  }
  var name
  for (name in draft.params) {
    if (String(draft.params[name] || "") !== String((original.params || {})[name] || "")) return true
  }
  for (name in (original.params || {})) {
    if (draft.params[name] === undefined) return true
  }
  return false
}