---- Aliases ----
local cmd = vim.cmd
local g = vim.g
local opt = vim.opt

---- General Config ----
opt.mouse = 'a'
opt.tabstop = 2
opt.shiftwidth = 2
opt.number = true
opt.breakindent = true
opt.showmatch = true
opt.ignorecase = true
opt.smartcase = true
opt.joinspaces = false
opt.showmode = false
opt.hidden = true
opt.backup = false
opt.writebackup = false
opt.swapfile = false
opt.shortmess:append({ I = true })
-- whichwrap -- left/right keys can traverse up/down
--opt.whichwrap = {'<','>','[',']'}
opt.cmdheight = 2
opt.showcmd = true
g.mapleader = ' '

---- Terminal ----
vim.api.nvim_create_autocmd({ "TermOpen" }, {
	callback = function()
		if vim.l then
			vim.l.number = false
		end
	end,
})

---- Theming ----
opt.termguicolors = true
opt.background = 'dark'
g.gruvbox_italic = true
cmd.colorscheme('gruvbox')
opt.listchars = {
	eol = '↲' ,
	tab = '▶▹',
	nbsp = '␣',
	extends = '…',
	trail = '•'}
-- vim-airline config ---
g.airline_powerline_fonts = true
g.airline_theme = 'powerlineish'
g['airline#extensions#tabline#enabled'] = 1
g['airline#extensions#tabline#left_sep'] = ' '
g['airline#extensions#tabline#left_alt_sep'] = '|'

---- Maps ----
vim.keymap.set('!','<C-BS>','<C-w>')
vim.keymap.set('v','>','>gv')
vim.keymap.set('v','<','<gv')
vim.keymap.set('n','<C-L>',':nohlsearch<CR>')

---- Treesitter ----
local ts = require 'nvim-treesitter.configs'
ts.setup {
	ensure_installed = {
		'bash',
		'c',
		'cmake',
		'comment',
		'cpp',
		'css',
		'dockerfile',
		'diff',
		'dot',
		'git_config',
		'git_rebase',
		'gitattributes',
		'gitcommit',
		'gitignore',
		'go',
		'html',
		'http',
		'ini',
		'javascript',
		'json',
		'kdl',
		'kotlin',
		'latex',
		'lua',
		'make',
		'markdown',
		'markdown_inline',
		'passwd',
		'perl',
		'php',
		'python',
		'regex',
		'rust',
		'scss',
		'sql',
		'terraform',
		'toml',
		'typescript',
		'vim',
		'yaml',
	},
	highlight = {enable = true, indent = true}}

---- Filetypes ---
vim.filetype.add({ extension = {kdl = 'kdl'} })


---- LSP ----
local lsp = require 'lspconfig'

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_lsp_attach = function(client, bufnr)
	-- See `:help vim.lsp.*` for documentation on any of the below functions
	vim.keymap.set('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
	vim.keymap.set('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
	vim.keymap.set('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
	vim.keymap.set('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
	vim.keymap.set('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
	vim.keymap.set('n', '<Leader>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
	vim.keymap.set('n', '<Leader>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
	vim.keymap.set('n', '<Leader>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>', opts)
	vim.keymap.set('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
	vim.keymap.set('n', '<Leader>e', '<cmd>lua vim.diagnostic.open_float()<CR>', opts)
	vim.keymap.set('n', '[d', '<cmd>lua vim.diagnostic.goto_prev()<CR>', opts)
	vim.keymap.set('n', ']d', '<cmd>lua vim.diagnostic.goto_next()<CR>', opts)
	vim.keymap.set('n', '<Leader>q', '<cmd>lua vim.diagnostic.setloclist()<CR>', opts)
	vim.keymap.set('n', '<F3>', '<cmd>lua vim.lsp.buf.formatting()<CR>', opts)
end

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = {
	clangd = {},
	eslint = {},
	gopls = {},
	jsonls = {},
	kotlin_language_server = {},
	marksman = {},
	pylsp = {},
	rust_analyzer = {},
	texlab = {},
	tflint = {},
	tsserver = {},
}
-- Setup loop moved to the cmp section, since calling setup multiple times
-- overrides the previous calls.

-- Auto format on save
vim.api.nvim_create_autocmd({ "BufWritePre" }, {
	callback = function()
		vim.lsp.buf.format()
	end,
})

---- Plugins ----
-- Go
g.ale_go_golangci_lint_options = ''
g.ale_go_golangci_lint_package = 1
---- nvim-lint ----
local lint = require 'lint'
local clippy_format = '%E%f:%l:%c: %\\d%#:%\\d%# %.%\\{-}'
			.. 'error:%.%\\{-} %m,%W%f:%l:%c: %\\d%#:%\\d%# %.%\\{-}'
			.. 'warning:%.%\\{-} %m,%C%f:%l %m,%-G,%-G'
			.. 'error: aborting %.%#,%-G'
			.. 'error: Could not compile %.%#,%E'
			.. 'error: %m,%Eerror[E%n]: %m,%-G'
			.. 'warning: the option `Z` is unstable %.%#,%W'
			.. 'warning: %m,%Inote: %m,%C %#--> %f:%l:%c'

lint.linters.clippy = {
	cmd = 'cargo clippy',
	stdin = false,
	append_fname = true,
	args = {},
	stream = 'stdout',
	ignore_exitcode = false,
	env = nil,
	parser = require('lint.parser').from_errorformat(clippy_format)
}

linters = {
	bash = {'shellcheck'},
	go = {'golangcilint'},
	python = {'flake8'},
	rust = {'clippy'},
	yaml = {'yamllint'},
}
-- set linters --
lint.linters_by_ft = linters
-- set autocommands --
for ft, ft_linters in pairs(linters) do
	local on_change = false
	local on_write = false
	for l in pairs(ft_linters) do
		if lint.linters.l.stdin then
			on_change = true
		else
			on_write = true
		end
	end
	if on_change then
		vim.api.nvim_create_autocmd(
			{"FileType"},
			{
				pattern=ft,
				callback = function()
					vim.api.nvim_create_autocmd(
						{"TextChanged" },
						{
							callback = function()
								lint.try_lint(nil, {ignore_errors=true})
							end,
						}
					)
				end
			}
		)
	end
	if on_write then
		vim.api.nvim_create_autocmd(
			{"FileType"},
			{
				pattern=ft,
				callback = function()
					vim.api.nvim_create_autocmd(
						{"BufWritePost" },
						{
							callback = function()
								lint.try_lint(nil, {ignore_errors=true})
							end,
						}
					)
				end
			}
		)
	end
end
---- LuaSnip
require('luasnip.loaders.from_lua').lazy_load()
cmd [[imap <silent><expr> <Tab> luasnip#expand_or_jumpable() ? '<Plug>luasnip-expand-or-jump' : '<Tab>']]
cmd [[inoremap <silent> <S-Tab> <cmd>lua require'luasnip'.jump(-1)<Cr>]]
cmd [[snoremap <silent> <Tab> <cmd>lua require('luasnip').jump(1)<Cr>]]
cmd [[snoremap <silent> <S-Tab> <cmd>lua require('luasnip').jump(-1)<Cr>]]
---- completion-nvim
local cmp = require'cmp'

cmp.setup({
	snippet = {
		expand = function(args)
			require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
		end,
	},
	window = {
		-- completion = cmp.config.window.bordered(),
		-- documentation = cmp.config.window.bordered(),
	},
	mapping = cmp.mapping.preset.insert({
		['<C-b>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-Space>'] = cmp.mapping.complete(),
		['<C-e>'] = cmp.mapping.abort(),
		-- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
		['<CR>'] = cmp.mapping.confirm({ select = true }),
	}),
	sources = cmp.config.sources({
		{ name = 'nvim_lsp' },
		{ name = 'luasnip' },
		{ name = 'path' },
		{ name = 'buffer' },
	})
})
--cmd [[autocmd FileType *\(TelescopePrompt\)\@<! lua require'completion'.on_attach()]]

-- Setup lspconfig.
local capabilities = vim.lsp.protocol.make_client_capabilities()
lsp.util.default_config = vim.tbl_deep_extend(
		'force', lsp.util.default_config, { capabilities = capabilities, })
for server, add_to_config in pairs(servers) do
	config = {
		on_attach = on_lsp_attach,
		flags = {
			debounce_text_changes = 150,
		},
	}
	for k,v in pairs(add_to_config) do
		config[k] = v
	end
	lsp[server].setup(config)
end
---- git-blame.nvim
g.gitblame_enabled = 0
---- gitsigns.nvim
require('gitsigns').setup {
	on_attach = function(bufnr)
		local gs = package.loaded.gitsigns

		-- Navigation
		vim.keymap.set('n', ']c', function()
			if vim.wo.diff then return ']c' end
			vim.schedule(function() gs.next_hunk() end)
			return '<Ignore>'
		end, {expr=true})

		vim.keymap.set('n', '[c', function()
			if vim.wo.diff then return '[c' end
			vim.schedule(function() gs.prev_hunk() end)
			return '<Ignore>'
		end, {expr=true})

		-- Actions
		vim.keymap.set({'n', 'v'}, '<leader>hs', ':Gitsigns stage_hunk<CR>')
		vim.keymap.set({'n', 'v'}, '<leader>hr', ':Gitsigns reset_hunk<CR>')
		vim.keymap.set('n', '<leader>hS', gs.stage_buffer)
		vim.keymap.set('n', '<leader>hu', gs.undo_stage_hunk)
		vim.keymap.set('n', '<leader>hR', gs.reset_buffer)
		vim.keymap.set('n', '<leader>hp', gs.preview_hunk)
		vim.keymap.set('n', '<leader>hb', function() gs.blame_line{full=true} end)
		vim.keymap.set('n', '<leader>tb', gs.toggle_current_line_blame)
		vim.keymap.set('n', '<leader>hd', gs.diffthis)
		vim.keymap.set('n', '<leader>hD', function() gs.diffthis('~') end)
		vim.keymap.set('n', '<leader>td', gs.toggle_deleted)

		-- Text object
		vim.keymap.set({'o', 'x'}, 'ih', ':<C-U>Gitsigns select_hunk<CR>')
	end
}
---- Comment.nvim
require('Comment').setup()
---- vim-markdown
g.vim_markdown_no_default_key_mappings = 1
g.vim_markdown_folding_disabled = 1
g.vim_markdown_toml_frontmatter = 1
---- Telescope
local telescope = require 'telescope'
telescope.setup{
	defaults = {
		file_ignore_patterns = {"%.avif", "%.jpg", "%.pdf", "%.png", "%.webp"},
	},
	pickers = {
		find_files = {
			hidden = true,
		}
	}
}
telescope.load_extension('fzy_native')
telescope.load_extension('luasnip')
local builtin = require('telescope.builtin')
vim.keymap.set('n', '<Leader>f', builtin.fd)
vim.keymap.set('n', '<Leader>b', builtin.buffers)
vim.keymap.set('n', '<Leader>/', builtin.current_buffer_fuzzy_find)
vim.keymap.set('n', '<Leader>g', builtin.live_grep)
vim.keymap.set('n', '<Leader>cg', builtin.grep_string)
vim.keymap.set('n', '<Leader>:', builtin.commands)
vim.keymap.set('n', '<Leader>s', telescope.extensions.luasnip.luasnip)
---- nvim-dap
local dap = require('dap')
vim.fn.sign_define('DapBreakpoint',{ text ='🟥', texthl ='', linehl ='', numhl =''})
vim.fn.sign_define('DapStopped',{ text ='▶️', texthl ='', linehl ='', numhl =''})
-- Set keymaps to control the debugge
vim.keymap.set('n', '<leader>dc', require 'dap'.continue)
vim.keymap.set('n', '<leader>do', require 'dap'.step_over)
vim.keymap.set('n', '<leader>di', require 'dap'.step_into)
vim.keymap.set('n', '<leader>dO', require 'dap'.step_out)
vim.keymap.set('n', '<leader>db', require 'dap'.toggle_breakpoint)
vim.keymap.set('n', '<leader>dB', function()
	require 'dap'.set_breakpoint(vim.fn.input('Breakpoint condition: '))
end)
local dapui = require('dapui')
dap.listeners.after.event_initialized["dapui_config"]=function()
	dapui.open()
end
dap.listeners.before.event_terminated["dapui_config"]=function()
	dapui.close()
end
dap.listeners.before.event_exited["dapui_config"]=function()
	dapui.close()
end
-- nvim-dap-go
require('dap-go').setup()

---- web-devicons
require('nvim-web-devicons').setup()