--[[
    init.lua - Main Neovim configuration entry point
    
    HOW THIS WORKS:
    1. Bootstrap lazy.nvim (plugin manager)
    2. Load basic settings
    3. Load all plugins from plugins/ directory
    4. Set global keymaps and LSP keymaps
]]

-- ============================================================================
-- STEP 0: SETUP NODE PATH (for fnm)
-- ============================================================================
local fnm_current = vim.fn.trim(vim.fn.system("fnm current 2>/dev/null"))
if fnm_current ~= "" then
	local fnm_dir = vim.fn.expand("~/.local/share/fnm")
	local fnm_bin_path = fnm_dir .. "/node-versions/" .. fnm_current .. "/installation/bin"
	vim.env.PATH = fnm_bin_path .. ":" .. vim.env.PATH
end

-- ============================================================================
-- STEP 1: BOOTSTRAP LAZY.NVIM
-- ============================================================================
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
	vim.fn.system({
		"git",
		"clone",
		"--filter=blob:none",
		"https://github.com/folke/lazy.nvim.git",
		"--branch=stable",
		lazypath,
	})
end
vim.opt.rtp:prepend(lazypath)

-- ============================================================================
-- STEP 2: LOAD SETTINGS
-- ============================================================================
require("basic-settings")

-- ============================================================================
-- STEP 3: LOAD PLUGINS
-- ============================================================================
require("lazy").setup("plugins")

-- ============================================================================
-- STEP 4: LSP KEYMAPS
-- ============================================================================
vim.keymap.set("n", "gd", vim.lsp.buf.definition, { desc = "Go to definition" })
vim.keymap.set("n", "gD", vim.lsp.buf.declaration, { desc = "Go to declaration" })
vim.keymap.set("n", "gi", vim.lsp.buf.implementation, { desc = "Go to implementation" })
vim.keymap.set("n", "gr", vim.lsp.buf.references, { desc = "Show references" })
vim.keymap.set("n", "K", vim.lsp.buf.hover, { desc = "Show hover docs" })
vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, { desc = "Rename symbol" })
vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, { desc = "Code actions" })
vim.keymap.set("n", "<leader>e", vim.diagnostic.open_float, { desc = "Show diagnostic" })

vim.diagnostic.config({
	virtual_text = { prefix = "●" },
	signs = true,
	float = { border = "rounded" },
})

-- ============================================================================
-- STEP 5: GLOBAL KEYMAPS
-- ============================================================================
vim.keymap.set("n", "<leader>w", ":w<CR>", { desc = "Save file" })
vim.keymap.set("n", "<leader>q", ":q<CR>", { desc = "Quit" })
vim.keymap.set("n", "<C-n>", ":Neotree filesystem reveal left<CR>", { desc = "Toggle explorer" })
vim.keymap.set("n", "<leader>nt", ":Neotree focus<CR>", { desc = "Focus neo-tree" })
vim.keymap.set("n", "<C-p>", ":Telescope find_files<CR>", { desc = "Find files" })

-- Better window navigation
vim.keymap.set("n", "<C-h>", "<C-w>h", { desc = "Navigate left" })
vim.keymap.set("n", "<C-j>", "<C-w>j", { desc = "Navigate down" })
vim.keymap.set("n", "<C-k>", "<C-w>k", { desc = "Navigate up" })
vim.keymap.set("n", "<C-l>", "<C-w>l", { desc = "Navigate right" })

-- Split windows
vim.keymap.set("n", "<leader>sh", ":split<CR>", { desc = "Split window horizontally" })
vim.keymap.set("n", "<leader>sv", ":vsplit<CR>", { desc = "Split window vertically" })
vim.keymap.set("n", "<leader>\"", ":split<CR>", { desc = "Split window horizontally" })
vim.keymap.set("n", "<leader>%", ":vsplit<CR>", { desc = "Split window vertically" })

-- Resize windows
vim.keymap.set("n", "<C-Up>", ":resize -2<CR>", { desc = "Resize window up" })
vim.keymap.set("n", "<C-Down>", ":resize +2<CR>", { desc = "Resize window down" })
vim.keymap.set("n", "<C-Left>", ":vertical resize -2<CR>", { desc = "Resize window left" })
vim.keymap.set("n", "<C-Right>", ":vertical resize +2<CR>", { desc = "Resize window right" })

-- Move text up/down
vim.keymap.set("n", "<A-j>", ":m .+1<CR>==", { desc = "Move line down" })
vim.keymap.set("n", "<A-k>", ":m .-2<CR>==", { desc = "Move line up" })
vim.keymap.set("v", "<A-j>", ":m '>+1<CR>gv=gv", { desc = "Move selection down" })
vim.keymap.set("v", "<A-k>", ":m '<-2<CR>gv=gv", { desc = "Move selection up" })

-- Folding keymaps
vim.keymap.set("n", "za", "za", { desc = "Toggle fold under cursor" })
vim.keymap.set("n", "zA", "zA", { desc = "Toggle fold recursively" })
vim.keymap.set("n", "zR", "zR", { desc = "Open all folds" })
vim.keymap.set("n", "zM", "zM", { desc = "Close all folds" })
vim.keymap.set("n", "zo", "zo", { desc = "Open fold under cursor" })
vim.keymap.set("n", "zc", "zc", { desc = "Close fold under cursor" })
vim.keymap.set("n", "zO", "zO", { desc = "Open all folds under cursor" })
vim.keymap.set("n", "zC", "zC", { desc = "Close all folds under cursor" })

-- Path of current file to clipboard
vim.keymap.set("n", "<leader>yp", ":let @+=expand('%:p')<CR>", { desc = "Absolute path of current file to clipboard" })
vim.keymap.set("n", "<leader>yr", ":let @+=expand('%:.')<CR>", { desc = "Relative path of current file to clipboard" })
vim.keymap.set("n", "<leader>cf", ":let @+=expand('%:t')<CR>", { desc = "Current filename to clipboard" })
vim.keymap.set({'n','v'}, '<leader>ya', function()
  local fname = vim.fn.expand('%:.')
  local lines = (vim.fn.mode() == 'v' or vim.fn.mode() == 'V')
    and (tostring(math.min(vim.fn.line("'<"), vim.fn.line("'>")))..'..'..tostring(math.max(vim.fn.line("'<"), vim.fn.line("'>"))))
    or tostring(vim.fn.line('.'))
  local result = fname..':'..lines
  vim.fn.setreg('+', result)
  print('Copied: '..result)
end, {desc = 'Copy file path and line(s) to clipboard'})

-- clear search highlighting
vim.keymap.set("n", "<leader>ch", ":noh<CR>", { desc = "clear search highlighting" })

-- toggle word wrap
vim.keymap.set("n", "<leader>tw", ":set wrap!<CR>", { desc = "toggle word wrap" })