-- General =====================================================================
vim.g.mapleader       = ' '  -- Use `<Space>` as <Leader> key
vim.o.undofile        = true -- Enable persistent undo

-- UI ==========================================================================
vim.o.breakindent     = true       -- Indent wrapped lines to match line start
vim.o.breakindentopt  = 'list:-1'  -- Add padding for lists (if 'wrap' is set)
vim.o.cursorline      = true       -- Enable current line highlighting
vim.o.linebreak       = true       -- Wrap lines at 'breakat' (if 'wrap' is set)
vim.o.list            = true       -- Show helpful text indicators
vim.o.number          = true       -- Show line numbers
vim.o.pumheight       = 10         -- Make popup menu smaller
vim.o.pummaxwidth     = 100        -- Make popup menu not too wide
vim.o.shortmess       = 'CFOSWaco' -- Disable some built-in completion messages
vim.o.signcolumn      = 'yes'      -- Always show signcolumn (less flicker)
vim.o.splitbelow      = true       -- Horizontal splits will be below
vim.o.splitkeep       = 'screen'   -- Reduce scroll during window split
vim.o.splitright      = true       -- Vertical splits will be to the right
vim.o.wrap            = false      -- Don't visually wrap lines (toggle with \w)
vim.o.cmdheight       = 0          -- Hide the command line when not in use.

-- Editing =====================================================================
vim.o.expandtab       = true     -- Convert tabs to spaces
vim.o.formatoptions   = 'rqnl1j' -- Improve comment editing
vim.o.ignorecase      = true     -- Ignore case during search
vim.o.infercase       = true     -- Infer case in built-in completion
vim.o.shiftwidth      = 2        -- Use this number of spaces for indentation
vim.o.smartcase       = true     -- Respect case if search pattern has upper case
vim.o.spelloptions    = 'camel'  -- Treat camelCase word parts as separate words
vim.o.tabstop         = 2        -- Show tab as this number of spaces
vim.o.virtualedit     = 'block'  -- Allow going past end of line in blockwise mode

-- Pattern for a start of numbered list (used in `gw`).
vim.o.formatlistpat   = [[^\s*[0-9\-\+\*]\+[\.\)]*\s\+]]

-- Built-in completion
vim.o.complete        = '.,w,b,kspell'                  -- Use less sources
vim.o.completeopt     = 'menuone,noselect,fuzzy,nosort' -- Use custom behavior
vim.o.completetimeout = 100                             -- Limit sources delay

-- Autocommands ================================================================
Config.autocmd('TextYankPost', '*', function() vim.hl.hl_op() end, 'Highlight yanked text')
Config.autocmd('TermOpen', '*', function() vim.cmd('startinsert') end, 'Start insert mode when terminal opens')

-- Diagnostics =================================================================
Config.later(function()
  vim.diagnostic.config({
    signs = { priority = 9999, severity = { min = 'WARN', max = 'ERROR' } },
    underline = { severity = { min = 'HINT', max = 'ERROR' } },
    virtual_lines = false,
    virtual_text = {
      current_line = true,
      severity = { min = 'ERROR', max = 'ERROR' },
    },
    update_in_insert = false,
  })
end)