-- Mostly Generated with Antigravity CLI Gemini 3.7 Flash
return {
	"lervag/vimtex",
	lazy = false,
	init = function()
		vim.g.vimtex_compiler_method = "tectonic"
		vim.g.vimtex_quickfix_mode = 0
		vim.g.vimtex_view_enabled = 0 -- Disable external GUI popup
	end,
	config = function()
		local function open_pdf_split()
			local pdf_path = vim.fn.expand("%:p:r") .. ".pdf"
			if vim.fn.filereadable(pdf_path) == 1 then
				vim.cmd("vsplit " .. vim.fn.fnameescape(pdf_path))
			else
				vim.notify("PDF not found: " .. pdf_path .. "\nCompile first with <Space>ll", vim.log.levels.WARN)
			end
		end

		-- Provide user command :VimtexPreviewBuffer
		vim.api.nvim_create_user_command("VimtexPreviewBuffer", open_pdf_split, { desc = "VimTeX: Open PDF in vertical split" })

		-- Buffer-local keymaps for TeX files
		vim.api.nvim_create_autocmd("FileType", {
			pattern = { "tex", "latex" },
			callback = function(ev)
				local opts = { buffer = ev.buf, desc = "VimTeX: View PDF in Neovim split" }
				vim.keymap.set("n", "<localleader>lv", open_pdf_split, opts)
				vim.keymap.set("n", "<leader>lv", open_pdf_split, opts)
			end,
		})

		-- Helper function to refresh and re-render all open PDF splits with image.nvim
		local function reload_pdf_buffers()
			local ok, image_api = pcall(require, "image")
			for _, win in ipairs(vim.api.nvim_list_wins()) do
				local buf = vim.api.nvim_win_get_buf(win)
				local buf_name = vim.api.nvim_buf_get_name(buf)
				if buf_name:match("%.pdf$") then
					vim.api.nvim_win_call(win, function()
						vim.cmd("edit!")
					end)
					if ok and image_api then
						local imgs = image_api.get_images({ window = win, buffer = buf })
						if #imgs > 0 then
							for _, img in ipairs(imgs) do
								img:clear()
								img:render()
							end
						else
							image_api.hijack_buffer(buf_name, win, buf)
						end
					end
				end
			end
		end

		-- Automatically trigger compilation on save (:w)
		vim.api.nvim_create_autocmd("BufWritePost", {
			pattern = "*.tex",
			callback = function()
				if vim.b.vimtex and vim.fn.exists(":VimtexCompileSS") == 2 then
					vim.cmd("VimtexCompileSS")
				end
			end,
		})

		-- Automatically reload and re-render PDF splits when compilation finishes
		vim.api.nvim_create_autocmd("User", {
			pattern = { "VimtexEventCompileSuccess", "VimtexEventCompileStopped" },
			callback = function()
				reload_pdf_buffers()
			end,
		})
	end,
}