-- Minimal settings for bootstrap and Phase 3.2

-- Disable unused language providers early; enable later only if a plugin requires them
vim.g.loaded_ruby_provider = 0
vim.g.loaded_perl_provider = 0
vim.g.loaded_node_provider = 0

-- Store initial working directory as project root
-- Used by netrw navigation to return to project root after following symlinks
vim.g.project_root = vim.fn.getcwd()

-- Prevent automatic directory changes when switching files
vim.opt.autochdir = false -- Keep working directory at project root

-- Enable project-local configuration files
vim.opt.exrc = true -- Load .nvim.lua from project root
vim.opt.secure = true -- Prompt before loading untrusted files

-- Custom tabline configuration
-- Load utils module for custom tabline function
local utils = require('utils')

-- Configure number of parent directories to show in full (default: 1)
-- Examples:
--   1: /path/to/my/project/src/file.txt → pat/to/my/project/src/file.txt
--   2: /path/to/my/project/src/file.txt → pat/to/my/project/src/file.txt
utils.tabline_full_parents = 1

-- Configure number of characters to show for shortened directories (default: 3)
-- Examples:
--   3: /path/to/my → pat/to/my
--   1: /path/to/my → p/t/m
utils.tabline_shorten_length = 4

-- Use custom tabline function
vim.opt.tabline = '%!v:lua.require("utils").custom_tabline()'
vim.opt.showtabline = 1 -- Show tabline only when there are 2+ tabs

-- Phase 3.2: non-plugin settings (legacy values where specified)
-- Completion UI for nvim-cmp
vim.opt.completeopt = { "menu", "menuone", "noselect" }

-- Spelling
vim.opt.spelllang = { "en_gb" }

-- Keyword characters (add $ for PHP/shell variables, - for CSS/HTML/config files)
vim.opt.iskeyword:append("$")
vim.opt.iskeyword:append("-")

-- Visuals
vim.opt.showbreak = "  ↳"
vim.opt.listchars = {
	eol = "¬",
	tab = "│ ",
	trail = "~",
	extends = ">",
	precedes = "<",
	space = "·",
}

-- Enable line numbers and relative line numbers
vim.opt.number = true
vim.opt.relativenumber = true

-- Scrolloff settings
vim.opt.scrolloff = 4

-- Phase 6.2: UX settings
vim.opt.signcolumn = "yes" -- Always show sign column (for LSP diagnostics, git signs, etc.)
vim.opt.cursorline = true -- Highlight current line
vim.opt.colorcolumn = "80,120" -- Visual guides at 80 and 120 characters

-- Phase 9.4: Default indentation (per-filetype overrides in after/ftplugin/)
vim.opt.tabstop = 4 -- Display tabs as 4 spaces
vim.opt.shiftwidth = 4 -- Indent by 4
vim.opt.softtabstop = 4 -- Backspace removes 4 spaces
vim.opt.expandtab = true -- Use spaces by default (overridden per-filetype)

-- Persistent undo
vim.opt.undofile = true -- Enable persistent undo
vim.opt.undodir = vim.fn.stdpath("config") .. "/undodir" -- Store undo files in config directory

-- LSP diagnostics configuration
vim.diagnostic.config({
	virtual_text = {
		spacing = 4,
		prefix = "●",
		-- Show severity (ERROR, WARN, INFO, HINT)
		format = function(diagnostic)
			return string.format("%s: %s", diagnostic.source or "", diagnostic.message)
		end,
	},
	signs = false, -- Disable signs (redundant with background highlights and virtual text)
	underline = true, -- Use background highlights on problematic text
	update_in_insert = false, -- Don't update diagnostics while typing
	severity_sort = true, -- Sort by severity (errors first)
	float = {
		border = "rounded",
		source = "always", -- Show diagnostic source
		header = "",
		prefix = "",
	},
})