-- lua/plugins/gitsigns.lua
-- Git signs in the gutter + hunk actions and navigation keymaps

return {
  'lewis6991/gitsigns.nvim',
  opts = {
    signs = {
      add          = { text = '+' },
      change       = { text = '~' },
      delete       = { text = '_' },
      topdelete    = { text = '‾' },
      changedelete = { text = '~' },
    },
    on_attach = function(bufnr)
      local gs = require 'gitsigns'

      local function map(mode, lhs, rhs, opts)
        opts = vim.tbl_extend('force', { buffer = bufnr }, opts or {})
        vim.keymap.set(mode, lhs, rhs, opts)
      end

      -- Navigation
      map('n', ']c', function()
        if vim.wo.diff then vim.cmd.normal { ']c', bang = true }
        else gs.nav_hunk 'next' end
      end, { desc = 'Jump to next git [c]hange' })

      map('n', '[c', function()
        if vim.wo.diff then vim.cmd.normal { '[c', bang = true }
        else gs.nav_hunk 'prev' end
      end, { desc = 'Jump to previous git [c]hange' })

      -- Hunk actions (visual + normal)
      map('v', '<leader>hs', function() gs.stage_hunk { vim.fn.line '.', vim.fn.line 'v' } end, { desc = 'git [s]tage hunk' })
      map('v', '<leader>hr', function() gs.reset_hunk { vim.fn.line '.', vim.fn.line 'v' } end, { desc = 'git [r]eset hunk' })
      map('n', '<leader>hs', gs.stage_hunk,                                                      { desc = 'git [s]tage hunk' })
      map('n', '<leader>hr', gs.reset_hunk,                                                      { desc = 'git [r]eset hunk' })
      map('n', '<leader>hS', gs.stage_buffer,                                                    { desc = 'git [S]tage buffer' })
      map('n', '<leader>hu', gs.undo_stage_hunk,                                                 { desc = 'git [u]ndo stage hunk' })
      map('n', '<leader>hR', gs.reset_buffer,                                                    { desc = 'git [R]eset buffer' })
      map('n', '<leader>hp', gs.preview_hunk,                                                    { desc = 'git [p]review hunk' })
      map('n', '<leader>hb', gs.blame_line,                                                      { desc = 'git [b]lame line' })
      map('n', '<leader>hd', gs.diffthis,                                                        { desc = 'git [d]iff against index' })
      map('n', '<leader>hD', function() gs.diffthis '@' end,                                     { desc = 'git [D]iff against last commit' })

      -- Toggles
      map('n', '<leader>tb', gs.toggle_current_line_blame, { desc = '[T]oggle git [b]lame line' })
      map('n', '<leader>tD', gs.preview_hunk_inline,       { desc = '[T]oggle git show [D]eleted' })
    end,
  },
}