local utils = require("Polydev.utils")
local M = {}

M.keybinds = {}
M.opts = nil

function M.setup(opts)
    M.opts = vim.tbl_deep_extend("force", {}, require("Polydev.configs").get("java"), opts or {})
    for key, command in pairs(M.opts.keybinds) do
	M.keybinds[command] = key
    end

    vim.api.nvim_create_user_command("JavaBuild", M.build, {})
    vim.api.nvim_create_user_command("JavaRun", M.run, {})

    if M.keybinds.JavaRun then
	vim.keymap.set("n", M.keybinds.JavaRun, ":JavaRun<CR>", { silent = true })
    end
    if M.keybinds.JavaBuild then
	vim.keymap.set("n", M.keybinds.JavaBuild, ":JavaBuild<CR>", { silent = true })
    end
end

function M.build()
    local project_root = vim.fn.expand("%:p:h"):match("(.*)/src")
    if not project_root then return print("Error: Could not detect project root directory.") end
    local out_dir = project_root .. "/build"

    vim.fn.mkdir(out_dir, "p")
    local compile_command = string.format("javac -d %s %s/*.java", out_dir, project_root .. "/src")
    local compile_status = vim.fn.system(compile_command)

    if vim.v.shell_error == 0 then
        print("Compilation successful!")
    else
        print("Error during compilation. Opening terminal for details...")
        local term_buf = utils.open_float_terminal(compile_command)
        vim.api.nvim_buf_set_option(term_buf, "modifiable", true)
        vim.api.nvim_buf_set_lines(term_buf, 0, -1, false, vim.split(compile_status, "\n", { trimempty = true }))
        vim.api.nvim_buf_set_option(term_buf, "modifiable", false)
    end
end

function M.run()
    local project_root = vim.fn.expand("%:p:h"):match("(.*)/src")
    if not project_root then return print("Error: Must be inside the 'src' directory.") end
    utils.open_float_terminal("java -cp " .. project_root .. "/build" .. " Main")
end

return M