local M = { "nvimtools/none-ls.nvim" }
local f = require("funcs")

M.event = { "BufReadPre", "BufNewFile" }

M.dependencies = { "mason-null-ls.nvim" }

local lsp_maps = function(client, bufnr)
    local lsp_mappings = f.empty_map_table()

    -- TODO: CONDITIONALLY GATE THIS
    lsp_mappings.n["<leader>lf"] = { function() vim.lsp.buf.format() end, desc = "Format" }

    lsp_mappings.n["<leader>ld"] = { function() vim.diagnostic.open_float() end, desc = "Hover diagnostics" }
    lsp_mappings.n["[d"] = { function() vim.diagnostic.goto_prev() end, desc = "Previous diagnostic" }
    lsp_mappings.n["]d"] = { function() vim.diagnostic.goto_next() end, desc = "Next diagnostic" }
    lsp_mappings.n["gl"] = { function() vim.diagnostic.open_float() end, desc = "Hover diagnostics" }

    if f.is_available("telescope.nvim") then
        lsp_mappings.n["<leader>lD"] = {
            function() require("telescope.builtin").diagnostics() end,
            desc = "Search diagnostics",
        }
    end

    if f.is_available "mason-lspconfig.nvim" then
        lsp_mappings.n["<leader>li"] = { "<cmd>LspInfo<cr>", desc = "LSP information" }
    end

    if f.is_available "null-ls.nvim" then
        lsp_mappings.n["<leader>lI"] = { "<cmd>NullLsInfo<cr>", desc = "Null-ls information" }
    end

    if client.supports_method "textDocument/codeAction" then
        lsp_mappings.n["<leader>la"] = {
            function() vim.lsp.buf.code_action() end,
            desc = "LSP code action",
        }
        lsp_mappings.v["<leader>la"] = lsp_mappings.n["<leader>la"]
    end
end

M.opts = function()
    local nls = require("null-ls")
    return {
        root_dir = require("null-ls.utils").root_pattern(".null-ls-root", "Makefile", ".git"),
        sources = {
            -- shell
            nls.builtins.formatting.shfmt,
            nls.builtins.code_actions.shellcheck,
            -- python
            nls.builtins.formatting.black,
            -- perl
            nls.builtins.formatting.perltidy,
            -- Various (yaml, markdown, json among others)
            nls.builtins.formatting.prettierd,
        },
        on_attach = lsp_maps
    }
end

return M