-- Non-plugin autocommands (minimal placeholder for bootstrap)
local aug = vim.api.nvim_create_augroup("UserDefaults", { clear = true })

-- Phase 10.3: Templates (auto-populate new files from templates)
local template_aug = vim.api.nvim_create_augroup("Templates", { clear = true })

vim.api.nvim_create_autocmd("BufNewFile", {
	group = template_aug,
	pattern = "*.sh",
	callback = function()
		-- Read template at top of file, then move to end
		vim.cmd("0read ~/.config/nvim/templates/template.sh")
		vim.cmd("normal! G")
	end,
})

-- Phase 9.4: Per-filetype indentation settings to match formatters

-- PHP: WordPress coding standards (tabs, displayed as 2 spaces)
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = "php",
	callback = function()
		vim.opt_local.expandtab = false -- Use actual tabs (WordPress standard)
		vim.opt_local.tabstop = 2 -- Display tabs as 2 spaces wide
		vim.opt_local.shiftwidth = 2 -- Indent/outdent by 2 columns (one tab)
		vim.opt_local.softtabstop = 2 -- Tab key inserts 2 columns (one tab)
	end,
})

-- JavaScript, TypeScript, JSON, CSS: Prettier defaults (2 spaces)
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = { "javascript", "javascriptreact", "typescript", "typescriptreact", "json", "css", "scss", "html" },
	callback = function()
		vim.opt_local.expandtab = true -- Use spaces (Prettier default)
		vim.opt_local.tabstop = 2 -- Display as 2 spaces
		vim.opt_local.shiftwidth = 2 -- Indent by 2
		vim.opt_local.softtabstop = 2
	end,
})

-- Lua: stylua defaults (2 spaces)
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = "lua",
	callback = function()
		vim.opt_local.expandtab = true -- Use spaces (common for Lua configs)
		vim.opt_local.tabstop = 2 -- Display as 2 spaces
		vim.opt_local.shiftwidth = 2 -- Indent by 2
		vim.opt_local.softtabstop = 2
	end,
})

-- Markdown: Prettier defaults (2 spaces) + spellcheck
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = "markdown",
	callback = function()
		vim.opt_local.expandtab = true -- Use spaces
		vim.opt_local.tabstop = 2 -- Display as 2 spaces
		vim.opt_local.shiftwidth = 2 -- Indent by 2
		vim.opt_local.softtabstop = 2
		vim.opt_local.spell = true -- Enable spellcheck for markdown
	end,
})

-- Python: Black defaults (4 spaces)
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = "python",
	callback = function()
		vim.opt_local.expandtab = true -- Use spaces (PEP 8)
		vim.opt_local.tabstop = 4 -- Display as 4 spaces
		vim.opt_local.shiftwidth = 4 -- Indent by 4
		vim.opt_local.softtabstop = 4
	end,
})

-- Phase 11.8: Colorize diagnostic severity in quickfix/location list
vim.api.nvim_create_autocmd("FileType", {
	group = aug,
	pattern = "qf", -- Applies to both quickfix and location list
	callback = function()
		-- Use matchadd() for higher priority highlighting
		-- This will override the default qf syntax
		vim.fn.matchadd("qfError", "\\<error\\>", 10)
		vim.fn.matchadd("qfWarning", "\\<warning\\>", 10)
		vim.fn.matchadd("qfInfo", "\\<info\\>", 10)
		vim.fn.matchadd("qfHint", "\\<hint\\>", 10)
		vim.fn.matchadd("qfNote", "\\<note\\>", 10)

		-- Also match uppercase variants
		vim.fn.matchadd("qfError", "\\<Error\\>", 10)
		vim.fn.matchadd("qfWarning", "\\<Warning\\>", 10)
		vim.fn.matchadd("qfInfo", "\\<Info\\>", 10)
		vim.fn.matchadd("qfHint", "\\<Hint\\>", 10)
		vim.fn.matchadd("qfNote", "\\<Note\\>", 10)
	end,
})

-- Session management: auto-load on startup, auto-save on exit (only if Session.vim exists)
local session_aug = vim.api.nvim_create_augroup("SessionManagement", { clear = true })

-- Auto-load Session.vim if it exists in the current directory
vim.api.nvim_create_autocmd("VimEnter", {
	group = session_aug,
	pattern = "*",
	nested = true, -- Allow other autocmds to fire after loading session
	callback = function()
		-- Only auto-load if:
		-- 1. Session.vim exists in cwd
		-- 2. No files were specified on command line (vim.fn.argc() == 0)
		-- 3. Not started with nvim -S (check if we already loaded a session)
		if vim.fn.argc() == 0 and vim.fn.filereadable("Session.vim") == 1 and vim.v.this_session == "" then
			vim.cmd("source Session.vim")
		end
	end,
})

-- Auto-save session on exit, but ONLY if Session.vim already exists
vim.api.nvim_create_autocmd("VimLeavePre", {
	group = session_aug,
	pattern = "*",
	callback = function()
		-- Only save if Session.vim exists (user manually created it)
		if vim.fn.filereadable("Session.vim") == 1 then
			vim.cmd("mksession! Session.vim")
		end
	end,
})

return {}