local M = {
  "lewis6991/gitsigns.nvim",
  event = "BufReadPre",
}

function M.config()
  require("gitsigns").setup({
    signs = {
      add = { hl = "GitSignsAdd", text = "▍", numhl = "GitSignsAddNr", linehl = "GitSignsAddLn" },
      change = {
        hl = "GitSignsChange",
        text = "▍",
        numhl = "GitSignsChangeNr",
        linehl = "GitSignsChangeLn",
      },
      delete = {
        hl = "GitSignsDelete",
        text = "▸",
        numhl = "GitSignsDeleteNr",
        linehl = "GitSignsDeleteLn",
      },
      topdelete = {
        hl = "GitSignsDelete",
        text = "▾",
        numhl = "GitSignsDeleteNr",
        linehl = "GitSignsDeleteLn",
      },
      changedelete = {
        hl = "GitSignsChange",
        text = "▍",
        numhl = "GitSignsChangeNr",
        linehl = "GitSignsChangeLn",
      },
      untracked = { hl = "GitSignsAdd", text = "▍", numhl = "GitSignsAddNr", linehl = "GitSignsAddLn" },
    },
    on_attach = function(bufnr)
      local gs = package.loaded.gitsigns

      local function map(mode, l, r, opts)
        opts = opts or {}
        if type(opts) == "string" then
          opts = { desc = opts }
        end
        opts.buffer = bufnr
        vim.keymap.set(mode, l, r, opts)
      end

      -- Navigation
      map("n", "]h", function()
        if vim.wo.diff then
          return "]h"
        end
        vim.schedule(function()
          gs.next_hunk()
        end)
        return "<Ignore>"
      end, { expr = true, desc = "Next Hunk" })

      map("n", "[h", function()
        if vim.wo.diff then
          return "[h"
        end
        vim.schedule(function()
          gs.prev_hunk()
        end)
        return "<Ignore>"
      end, { expr = true, desc = "Prev Hunk" })

      -- Actions
      map({ "n", "v" }, "<leader>ghs", ":Gitsigns stage_hunk<CR>", "Stage Hunk")
      map({ "n", "v" }, "<leader>ghr", ":Gitsigns reset_hunk<CR>", "Reset Hunk")
      map("n", "<leader>ghS", gs.stage_buffer, "Stage Buffer")
      map("n", "<leader>ghu", gs.undo_stage_hunk, "Undo Stage Hunk")
      map("n", "<leader>ghR", gs.reset_buffer, "Reset Buffer")
      map("n", "<leader>ghp", gs.preview_hunk, "Preview Hunk")
      map("n", "<leader>ghb", function()
        gs.blame_line({ full = true })
      end, "Blame Line")
      map("n", "<leader>ghd", gs.diffthis, "Diff This")
      map("n", "<leader>ghD", function()
        gs.diffthis("~")
      end, "Diff This ~")

      -- Text object
      map({ "o", "x" }, "ih", ":<C-U>Gitsigns select_hunk<CR>", "GitSigns Select Hunk")
    end,
  })
end

return M