local env = require("my.helpers.env")

local M = {
  "lewis6991/gitsigns.nvim",
  event = "BufReadPost",
  cond = env.firenvim.not_active() and env.vscode.not_active(),
  opts = {
    on_attach = function(bufnr)
      local gs = package.loaded.gitsigns

      -- {{{ Helpers
      local function map(mode, from, to, desc, expr)
        vim.keymap.set(
          mode,
          from,
          to,
          { expr = expr, silent = true, buffer = bufnr, desc = desc }
        )
      end

      local function exprmap(from, to, desc)
        map("n", from, to, desc, true)
      end
      -- }}}
      -- {{{ Navigation
      exprmap("]c", function()
        if vim.wo.diff then
          return "]c"
        end

        vim.schedule(function()
          gs.next_hunk()
        end)

        return "<Ignore>"
      end, "Navigate to next hunk")

      exprmap("[c", function()
        if vim.wo.diff then
          return "[c"
        end

        vim.schedule(function()
          gs.prev_hunk()
        end)

        return "<Ignore>"
      end, "Navigate to previous hunk")
      -- }}}
      -- {{{ Actions
      local prefix = "<leader>h"

      -- require("which-key").register({
      --   ["<leader>"] = { h = { name = "gitsigns" } },
      -- })

      -- {{{ Normal mode
      map("n", prefix .. "s", gs.stage_hunk, "[s]tage hunk")
      map("n", prefix .. "r", gs.reset_hunk, "[r]eset hunk")
      map("n", prefix .. "S", gs.stage_buffer, "[s]tage buffer")
      map("n", prefix .. "u", gs.undo_stage_hunk, "[u]ndo hunk staging")
      map("n", prefix .. "R", gs.reset_buffer, "[r]eset buffer")
      map("n", prefix .. "p", gs.preview_hunk, "[p]review hunk")
      map("n", prefix .. "b", function()
        gs.blame_line({ full = true })
      end, "[b]lame line")
      map("n", prefix .. "d", gs.diffthis, "[d]iff this")
      map("n", prefix .. "D", function()
        gs.diffthis("~")
      end, "[d]iff file (?)")
      -- }}}
      -- {{{ Toggles
      map(
        "n",
        prefix .. "tb",
        gs.toggle_current_line_blame,
        "[t]oggle line [b]laming"
      )
      map("n", prefix .. "td", gs.toggle_deleted, "[t]oggle [d]eleted")
      -- }}}
      -- {{{ Visual
      map("v", prefix .. "s", function()
        gs.stage_hunk({ vim.fn.line("."), vim.fn.line("v") })
      end, "stage visual hunk")
      map("v", prefix .. "r", function()
        gs.reset_hunk({ vim.fn.line("."), vim.fn.line("v") })
      end, "reset visual hunk")
      -- }}}
      -- }}}
      -- {{{ Text objects
      map({ "o", "x" }, "ih", ":<C-U>Gitsigns select_hunk<CR>", "Inside hunk")
      -- }}}
    end,
  },
}

return M