require "nvchad.mappings"

local map = vim.keymap.set

map("n", ";", ":", { desc = "CMD enter command mode" })
map("i", "jj", "<ESC>")
map("i", "оо", "<ESC>")

-- Перемещение строк вверх/вниз в Visual режиме
map("v", "<A-j>", ":m '>+1<CR>gv=gv", { desc = "Move line down" })
map("v", "<A-k>", ":m '<-2<CR>gv=gv", { desc = "Move line up" })

-- Курсор остаётся на месте при объединении строк
map("n", "J", "mzJ`z", { desc = "Join lines keeping cursor" })

-- Центрировать экран при скролле и поиске
map("n", "<C-d>", "<C-d>zz", { desc = "Scroll down centered" })
map("n", "<C-u>", "<C-u>zz", { desc = "Scroll up centered" })
map("n", "n", "nzzzv", { desc = "Next search centered" })
map("n", "N", "Nzzzv", { desc = "Prev search centered" })

-- Вставка поверх выделения без потери буфера
map("x", "<leader>p", '"_dP', { desc = "Paste without yanking" })

-- Быстрое сохранение
map({ "n", "i", "v" }, "<C-s>", "<cmd>w<CR>", { desc = "Save file" })

-- Markdown превью: scroll sync
local mdviewer_sync = vim.api.nvim_create_augroup("MDViewerScrollSync", { clear = true })
local mdviewer_preview_win = nil

local function setup_scroll_sync()
  vim.api.nvim_clear_autocmds { group = mdviewer_sync }
  vim.api.nvim_create_autocmd("CursorMoved", {
    group = mdviewer_sync,
    callback = function()
      local win = mdviewer_preview_win
      if not win or not vim.api.nvim_win_is_valid(win) then return end

      local src_line = vim.api.nvim_win_get_cursor(0)[1]
      local src_total = vim.api.nvim_buf_line_count(0)
      if src_total <= 1 then return end

      local ratio = (src_line - 1) / (src_total - 1)

      pcall(vim.api.nvim_win_call, win, function()
        local term_total = vim.fn.line "$"
        if term_total <= 1 then return end
        local target = math.max(1, math.floor(ratio * (term_total - 1)) + 1)
        vim.cmd("normal! " .. target .. "Gzt")
      end)
    end,
  })
end

map("n", "<leader>mp", function()
  vim.cmd "MDViewerToggle"
  local preview = require "mdviewer.preview"
  if preview.is_active() then
    -- После toggle курсор в окне превью — запоминаем его
    mdviewer_preview_win = vim.api.nvim_get_current_win()
    vim.cmd "wincmd p"
    setup_scroll_sync()
  else
    mdviewer_preview_win = nil
    vim.api.nvim_clear_autocmds { group = mdviewer_sync }
  end
end, { desc = "Toggle markdown preview" })