-- LSP und Treesitter Konfiguration
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

-- Mason für einfache LSP-Installation
require('mason').setup()
require('mason-lspconfig').setup({
	ensure_installed = {
		-- Sprachen
		'lua_ls',            -- Lua
		'pyright',           -- Python
		'ruff',              -- Python Linter
		'ts_ls',             -- TypeScript/JavaScript
		-- 'vue-language-server', -- Vue
		'intelephense',      -- PHP
		'html',              -- HTML
		'cssls',             -- CSS
		'yamlls',            -- YAML
		'jsonls',            -- JSON
		'docker_compose_language_service', -- Docker Compose
		'dockerls',          -- Dockerfile
		'gopls',
	},
})

-- LSP-Server konfigurieren
local lspconfig = require('lspconfig')

-- Lua
lspconfig.lua_ls.setup({
	capabilities = capabilities,
})

-- TypeScript (inkl. React)
lspconfig.ts_ls.setup({
	capabilities = capabilities,
})

-- Typescript-Tools für bessere TS/JS Unterstützung
require("typescript-tools").setup({
	settings = {
		-- Für NestJS, React und andere TS-Frameworks
		tsserver_file_preferences = {
			importModuleSpecifierPreference = "relative",
		},
	},
})

-- Python
lspconfig.pyright.setup({
	capabilities = capabilities,
})

-- PHP/Symfony
lspconfig.intelephense.setup({
	capabilities = capabilities,
	settings = {
		intelephense = {
			stubs = {
				"apache", "bcmath", "bz2", "calendar", "Core", "curl", "date", "dba",
				"dom", "fileinfo", "filter", "ftp", "gd", "gettext", "hash", "iconv",
				"imap", "intl", "json", "ldap", "libxml", "mbstring", "mysqli", "mysqlnd",
				"oci8", "openssl", "pcntl", "pcre", "PDO", "pdo_mysql", "pdo_pgsql",
				"pdo_sqlite", "pgsql", "Phar", "posix", "pspell", "readline", "Reflection",
				"session", "shmop", "SimpleXML", "snmp", "soap", "sockets", "sodium", "SPL",
				"sqlite3", "standard", "superglobals", "sysvmsg", "sysvsem", "sysvshm",
				"tidy", "tokenizer", "xml", "xmlreader", "xmlrpc", "xmlwriter", "xsl", "Zend OPcache",
				"zip", "zlib", "wordpress", "symfony"
			},
		},
	},
})

-- Go
lspconfig.gopls.setup({
	capabilities = capabilities,
	settings = {
		gopls = {
			analyses = {
				unusedparams = true,
			},
			staticcheck = true,
			gofumpt = true, -- Strengere Formatierung als gofmt
			usePlaceholders = true,
			completeUnimported = true,
			experimentalPostfixCompletions = true,
		},
	},
})

-- YAML mit Schema-Unterstützung
lspconfig.yamlls.setup({
	capabilities = capabilities,
	settings = {
		yaml = {
			schemas = require('schemastore').yaml.schemas(),
		},
	},
})

-- JSON mit Schema-Unterstützung
lspconfig.jsonls.setup({
	capabilities = capabilities,
	settings = {
		json = {
			schemas = require('schemastore').json.schemas(),
			validate = { enable = true },
		},
	},
})

-- Treesitter-Konfiguration für Syntax-Highlighting
require('nvim-treesitter.configs').setup({
	ensure_installed = {
		"lua", "vim", "vimdoc", "json", "yaml", "html", "css",
		"javascript", "typescript", "tsx", "php", "python", "vue",
		"dockerfile", "markdown", "regex", "bash", "go",
	},
	highlight = { enable = true },
	indent = { enable = true },
})

-- Autocomplete-Konfiguration
local cmp = require('cmp')
local luasnip = require('luasnip')

cmp.setup({
	snippet = {
		expand = function(args)
			luasnip.lsp_expand(args.body)
		end,
	},
	window = {
		completion = cmp.config.window.bordered(),
		documentation = cmp.config.window.bordered(),
	},
	mapping = cmp.mapping.preset.insert({
		['<C-d>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-Space>'] = cmp.mapping.complete(),
		['<CR>'] = cmp.mapping.confirm({ select = true }),
		['<Tab>'] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			else
				fallback()
			end
		end, { 'i', 's' }),
		['<S-Tab>'] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_prev_item()
			elseif luasnip.jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, { 'i', 's' }),
	}),
	sources = cmp.config.sources({
		{ name = 'nvim_lsp' },
		{ name = 'luasnip' },
		{ name = 'buffer' },
		{ name = 'path' },
	}),
})

-- Einfache benutzerdefinierte Snippets (optional)
-- Hier ein Beispiel für ein paar einfache Snippets
local snippets_path = vim.fn.stdpath("config") .. "/snippets"
if vim.fn.isdirectory(snippets_path) == 0 then
	vim.fn.mkdir(snippets_path, "p")
end

-- Füge einige nützliche Snippets hinzu
luasnip.add_snippets("python", {
	luasnip.snippet("def", {
		luasnip.text_node("def "),
		luasnip.insert_node(1, "function_name"),
		luasnip.text_node("("),
		luasnip.insert_node(2, "args"),
		luasnip.text_node("):\n\t"),
		luasnip.insert_node(0),
	}),
})

luasnip.add_snippets("typescript", {
	luasnip.snippet("fn", {
		luasnip.text_node("function "),
		luasnip.insert_node(1, "name"),
		luasnip.text_node("("),
		luasnip.insert_node(2, "params"),
		luasnip.text_node(") {\n\t"),
		luasnip.insert_node(0),
		luasnip.text_node("\n}"),
	}),
})

luasnip.add_snippets("go", {
	luasnip.snippet("func", {
		luasnip.text_node("func "),
		luasnip.insert_node(1, "name"),
		luasnip.text_node("("),
		luasnip.insert_node(2, "params"),
		luasnip.text_node(") "),
		luasnip.insert_node(3, "returnType"),
		luasnip.text_node(" {\n\t"),
		luasnip.insert_node(0),
		luasnip.text_node("\n}"),
	}),
	luasnip.snippet("if", {
		luasnip.text_node("if "),
		luasnip.insert_node(1, "condition"),
		luasnip.text_node(" {\n\t"),
		luasnip.insert_node(0),
		luasnip.text_node("\n}"),
	}),
})

-- Code-Formatierung
require("conform").setup({
	formatters_by_ft = {
		javascript = { "prettier" },
		typescript = { "prettier" },
		javascriptreact = { "prettier" },
		typescriptreact = { "prettier" },
		vue = { "prettier" },
		json = { "prettier" },
		yaml = { "prettier" },
		html = { "prettier" },
		css = { "prettier" },
		php = { "php_cs_fixer" },
		python = { "black" },
		lua = { "stylua" },
		go = { "gofumpt" },
	},
})

-- Formatierung beim Speichern
vim.api.nvim_create_autocmd("BufWritePre", {
	pattern = "*",
	callback = function()
		require("conform").format({ async = false, lsp_fallback = true })
	end,
})


-- Einstellungen für die Diagnostik (Fehleranzeige)
vim.diagnostic.config({
	virtual_text = {
		format = function(diagnostic)
			local icon = "→ "
			if diagnostic.severity == vim.diagnostic.severity.ERROR then
				icon = "✗ "
			elseif diagnostic.severity == vim.diagnostic.severity.WARN then
				icon = "⚠ "
			elseif diagnostic.severity == vim.diagnostic.severity.INFO then
				icon = "ℹ "
			elseif diagnostic.severity == vim.diagnostic.severity.HINT then
				icon = "➤ "
			end
			return icon .. diagnostic.message
		end
	},
	signs = true, -- Symbole in der Randspalte anzeigen
	underline = true, -- Problematischen Code unterstreichen
	update_in_insert = false,
	severity_sort = true,
	float = {
		border = "rounded",
		source = "always",
	},
})

-- Tastenkombinationen für Diagnostik
vim.keymap.set('n', '<leader>cd', vim.diagnostic.open_float, { desc = 'Fehlerdetails anzeigen' })
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, { desc = 'Vorheriger Fehler' })
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, { desc = 'Nächster Fehler' })
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Fehler in Liste anzeigen' })