-- Type-to-search move picker.  The inspector used to change moves by cycling
-- the catalog one tap at a time -- 165 taps to walk Gen1 -- which is the same
-- class of friction the species arrows had before #541.  This is the
-- replacement: one modal list, filtered as you type, committing through
-- Ops.setMove so an unusable / scalar id refuses instead of asserting.
--
-- Modal is literal.  Kit hit-tests without a z-order, so App.draw raises
-- Kit.blockClicks over the chrome and the panel while this is open and lowers
-- it only for this overlay; nothing underneath can take the same tap.

local Theme = require("Theme")
local Ops = require("Ops")
local PickerChrome = require("PickerChrome")
local PAL = Theme.PAL

local Picker = {}

local FIELD_ID = "move-picker"

function Picker.results(S)
  local p = S.movePicker
  return Ops.moveSearch(S, p and p.query or "")
end

local function commit(S, id)
  local p = S.movePicker
  if not p then return false end
  return Ops.setMove(S, S.editingMon, p.slot, id)
end

-- Enter commits the top match, which is the whole point of a search field.
function Picker.commitFirst(S, Kit)
  local hits = Picker.results(S)
  if not hits[1] then return Ops.say(S, "No move matches that") end
  local ok = commit(S, hits[1])
  if ok then Ops.closeMovePicker(S, Kit) end
  return ok
end

function Picker.draw(S, Kit, width, height)
  local p = S.movePicker
  if not p then return end
  local s = Kit.scale

  -- The click that opened the picker is still the frame's click: the
  -- inspector dispatches earlier in App.draw than this overlay does, so
  -- without swallowing it the scrim below would read it as a tap outside and
  -- shut the picker in the same frame it went up.  App re-raises the shield
  -- at the top of the next frame, so leaving it up here is safe.
  if p.opened then
    p.opened = nil
    Kit.blockClicks = true
  end

  -- the scrim doubles as the "tap outside to cancel" target; it covers the
  -- full window so unsafe bands (notch / home indicator) stay dimmed too
  Theme.col(PAL.bgBot, 0.72)
  love.graphics.rectangle("fill", 0, 0, width, height)

  -- Card fills / centres in SafeArea so phones and RGxxx landscapes keep a
  -- usable list (#917 / #715).
  local x, y, w, h, pad = PickerChrome.card(Kit, width, height)
  if Kit.press(0, 0, width, height) and not Kit.hit(x, y, w, h) then
    Ops.closeMovePicker(S, Kit)
    return
  end

  Kit.card(x, y, w, h)
  local cx, cy = x + pad, y + pad
  local inner = w - 2 * pad

  local closeW = PickerChrome.closeSize(Kit)
  local captionH = Kit.textHeight("caption")
  local headH = math.max(captionH, closeW)
  Kit.caption(cx, cy + (headH - captionH) / 2, ("CHOOSE MOVE %d"):format(p.slot or 1))
  if Kit.button(x + w - pad - closeW, cy + (headH - closeW) / 2, closeW, closeW, "x",
      { font = "small", radius = 7 * s }) then
    Ops.closeMovePicker(S, Kit)
    return
  end
  cy = cy + headH + 10 * s

  local fieldH = PickerChrome.fieldH(Kit)
  p.query = Kit.textfield(FIELD_ID, cx, cy, inner, fieldH, p.query,
    "type a name, an id, or a type")
  cy = cy + fieldH + 10 * s

  local hits = Picker.results(S)
  local listH, rowH, rowGap, pagerH = PickerChrome.listMetrics(Kit, y, h, pad, cy)
  local perPage = math.max(1, math.floor((listH + rowGap) / (rowH + rowGap)))
  p.offset = Theme.clamp(p.offset or 0, 0, math.max(0, #hits - perPage))
  -- wheel / touch drag scroll the modal list too; the shield is already
  -- lowered for this layer, so Kit.scroll works here and only here (#715)
  p.offset = Kit.scroll(cx, cy, inner, listH, p.offset, #hits, perPage)

  local mon = S.editingMon
  local currentId = mon and mon.moves and mon.moves[p.slot]
    and mon.moves[p.slot].id

  if #hits == 0 then
    Kit.emptyBox(cx, cy, inner, listH, "Nothing matches that.")
  else
    Kit.pushClip(cx, cy, inner, listH)
    for i = 1, perPage do
      local id = hits[p.offset + i]
      if not id then break end
      local ry = cy + (i - 1) * (rowH + rowGap)
      local def = S.data.moves[id]
      local usable = Ops.moveUsable(S, id)
      local current = currentId == id
      if Kit.row(cx, ry, inner, rowH, current, PAL.green, 9 * s) then
        if commit(S, id) then
          Ops.closeMovePicker(S, Kit)
          Kit.popClip()
          return
        end
      end
      local typ = usable and tostring(def and def.type or "?") or "no data"
      local pp = usable and ("PP %d"):format(tonumber(def and def.pp) or 0) or ""
      local tail = pp ~= "" and (typ .. "  " .. pp) or typ
      local tailW = Kit.textWidth("tiny", tail)
      Kit.text("monoRow",
        Kit.ellipsize("monoRow", id, inner - tailW - 28 * s),
        cx + 12 * s, ry + (rowH - Kit.textHeight("monoRow")) / 2,
        usable and PAL.text or PAL.faint)
      Kit.textRight("tiny", tail, cx + inner - 10 * s,
        ry + (rowH - Kit.textHeight("tiny")) / 2, PAL.caption)
    end
    Kit.popClip()
    Kit.scrollbar(cx, cy, inner, listH, p.offset, #hits, perPage)
  end

  p.offset = Kit.pager(cx, y + h - pad - pagerH, inner, p.offset, #hits, perPage)
end

return Picker