local map = vim.keymap.set

map("n", "<leader>e", "<cmd>NvimTreeToggle<CR>", { desc = "NvimTree" })

map("n", "<leader>f", function()
  require("conform").format { async = true }
end, { desc = "Format buffer" })

map("n", "<C-h>", "<C-w>h", { desc = "switch window left" })
map("n", "<C-l>", "<C-w>l", { desc = "switch window right" })
map("n", "<C-j>", "<C-w>j", { desc = "switch window down" })
map("n", "<C-k>", "<C-w>k", { desc = "switch window up" })

map("n", "<Esc>", "<cmd>noh<CR>", { desc = "general clear highlights" })

map("n", "<leader>n", "<cmd>set nu!<CR>", { desc = "toggle line number" })

map("n", "<leader>/", "gcc", { desc = "toggle comment", remap = true })
map("v", "<leader>/", "gc", { desc = "toggle comment", remap = true })

map("t", "<C-x>", "<C-\\><C-N>", { desc = "terminal escape terminal mode" })

map("n", "<leader>th", "<cmd>ToggleTerm direction=horizontal<cr>", { desc = "ToggleTerm: horizontal" })
map("n", "<leader>tf", "<cmd>ToggleTerm direction=float<cr>", { desc = "ToggleTerm: float" })

map("n", "<Tab>", "<cmd>BufferLineCycleNext<cr>", { desc = "Next buffer" })
map("n", "<S-Tab>", "<cmd>BufferLineCyclePrev<cr>", { desc = "Previous buffer" })
map("n", "<leader>ba", "<cmd>BufferLineCloseOthers<CR>", { desc = "Close other buffers" })
map("n", "<leader>x", "<cmd>BufferLinePickClose<CR>", { desc = "Close buffer" })
map("n", "<leader>bc", "<cmd>BufferLinePick<CR>", { desc = "Close buffer" })

vim.api.nvim_create_autocmd("LspAttach", {
  callback = function(ev)
    local bufnr = ev.buf

    local opts = function(desc)
      return { buffer = bufnr, silent = true, desc = desc }
    end

    map("n", "gd", vim.lsp.buf.definition, opts "LSP: Go to definition")
    map("n", "gD", vim.lsp.buf.declaration, opts "LSP: Go to declaration")
    map("n", "gi", vim.lsp.buf.implementation, opts "LSP: Go to implementation")
    map("n", "gr", vim.lsp.buf.references, opts "LSP: References")
    map("n", "K", vim.lsp.buf.hover, opts "LSP: Hover")
    map("n", "<leader>rn", vim.lsp.buf.rename, opts "LSP: Rename")
    map("n", "<leader>ca", vim.lsp.buf.code_action, opts "LSP: Code action")

    map("n", "[d", function()
      vim.diagnostic.jump { count = -1, float = true }
    end, opts "Diag: Prev")
    map("n", "]d", function()
      vim.diagnostic.jump { count = 1, float = true }
    end, opts "Diag: Next")
    map("n", "<leader>dd", vim.diagnostic.open_float, opts "Diag: Line diagnostics")

    map("n", "<leader>lf", function()
      vim.lsp.buf.format { async = true }
    end, opts "LSP: Format (server)")
  end,
})