vim.pack.add({ 'https://github.com/lewis6991/gitsigns.nvim' })

require('gitsigns').setup({
  on_attach = function(bufnr)
    local gitsigns = require('gitsigns')

    local function map(mode, lhs, rhs, desc)
      vim.keymap.set(mode, lhs, rhs, { buffer = bufnr, desc = desc })
    end

    -- Navigation, falling back to vim's own diff motions in diff mode
    map('n', ']c', function()
      if vim.wo.diff then
        vim.cmd.normal({ ']c', bang = true })
      else
        gitsigns.nav_hunk('next')
      end
    end, 'Next git hunk')

    map('n', '[c', function()
      if vim.wo.diff then
        vim.cmd.normal({ '[c', bang = true })
      else
        gitsigns.nav_hunk('prev')
      end
    end, 'Previous git hunk')

    -- Actions
    map('n', '<leader>hs', gitsigns.stage_hunk, 'Stage hunk')
    map('n', '<leader>hr', gitsigns.reset_hunk, 'Reset hunk')

    map('v', '<leader>hs', function()
      gitsigns.stage_hunk({ vim.fn.line('.'), vim.fn.line('v') })
    end, 'Stage selected hunk')

    map('v', '<leader>hr', function()
      gitsigns.reset_hunk({ vim.fn.line('.'), vim.fn.line('v') })
    end, 'Reset selected hunk')

    map('n', '<leader>hS', gitsigns.stage_buffer, 'Stage buffer')
    map('n', '<leader>hR', gitsigns.reset_buffer, 'Reset buffer')
    map('n', '<leader>hp', gitsigns.preview_hunk, 'Preview hunk')
    map('n', '<leader>hd', gitsigns.diffthis, 'Diff against index')

    map('n', '<leader>hb', function()
      gitsigns.blame_line({ full = true })
    end, 'Blame line')

    map('n', '<leader>hq', gitsigns.setqflist, 'Hunks to quickfix')

    -- Toggles
    map('n', '<leader>tb', gitsigns.toggle_current_line_blame, 'Toggle line blame')
    map('n', '<leader>td', gitsigns.toggle_deleted, 'Toggle deleted lines')
  end,
})