-- General
vim.g.mapleader = ' '                                 -- Use <Space> as <Leader> key
vim.o.undofile  = true                                -- Keep undo history after closing files
vim.o.shada     = "'50,<20,s10,:100,/50,@50,h,r/tmp/" -- Fewer saved items (faster startup), skip /tmp files

-- UI
vim.o.number     = true                    -- Show line numbers
vim.o.cursorline = true                    -- Highlight the line the cursor is on
vim.o.signcolumn = 'yes'                   -- Always show sign column (no text shifting)
vim.o.wrap       = false                   -- Don't wrap long lines
vim.o.list       = true                    -- Show tabs, trailing spaces and nbsp
vim.o.listchars  = 'tab:→ ,trail:·,nbsp:␣' -- Symbols used for those characters
vim.o.fillchars  = 'eob: '                 -- Hide `~` on lines after end of buffer
vim.o.splitbelow = true                    -- Open horizontal splits below
vim.o.splitright = true                    -- Open vertical splits to the right
vim.o.splitkeep  = 'screen'                -- Keep text in place when opening splits
vim.o.cmdheight  = 0                       -- Hide command line when not typing a command
vim.o.shortmess  = 'CFOSWacou'             -- Hide completion, search count, undo and write messages
vim.cmd.syntax('off')                      -- Disable legacy syntax (treesitter handles highlighting)
require('vim._core.ui2').enable({          -- New message/cmdline UI, messages in float (nightly)
  msg = { targets = 'msg' }
})

-- Editing
vim.o.expandtab    = true    -- Insert spaces when pressing <Tab>
vim.o.shiftwidth   = 2       -- Spaces per indent level (>>, <<, autoindent)
vim.o.tabstop      = 2       -- Display width of a tab character
vim.o.ignorecase   = true    -- Ignore case when searching
vim.o.smartcase    = true    -- ...unless the pattern contains uppercase
vim.o.virtualedit  = 'block' -- Allow cursor past end of line in visual block
vim.o.spelloptions = 'camel' -- Spell-check camelCase words per part

-- Completion
vim.o.complete     = '.,w,b,kspell'                 -- Complete from buffer, windows, buffers, spell
vim.o.completeopt  = 'menuone,noselect,fuzzy,popup' -- Show menu for one match, don't preselect, fuzzy match, description popup
vim.o.pumheight    = 10                             -- Max items visible in completion popup
vim.o.pummaxwidth  = 120                            -- Max width of completion popup

-- 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')
Config.autocmd('LspAttach', '*', function(ev) vim.bo[ev.buf].complete = 'o' end, 'Use lsp completions')

-- Diagnostics
Config.later(function()
  vim.diagnostic.config({
    jump = { on_jump = vim.diagnostic.open_float },
    signs = {
      priority = 9999,
      severity = { min = vim.diagnostic.severity.INFO },
      text = {
        [vim.diagnostic.severity.ERROR] = '',
        [vim.diagnostic.severity.WARN]  = '',
        [vim.diagnostic.severity.INFO]  = '',
      },
    },
  })
end)