require('spec.helpers')
local git = require('diffs.git')

describe('git', function()
  describe('get_repo_root', function()
    it('returns repo root for current repo', function()
      local cwd = vim.fn.getcwd()
      local root = git.get_repo_root(cwd .. '/lua/diffs/init.lua')
      assert.is_not_nil(root)
      assert.are.equal(cwd, root)
    end)

    it('returns nil for non-git directory', function()
      local root = git.get_repo_root('/tmp')
      assert.is_nil(root)
    end)
  end)

  describe('get_file_content', function()
    it('returns file content at HEAD', function()
      local cwd = vim.fn.getcwd()
      local content, err = git.get_file_content('HEAD', cwd .. '/lua/diffs/init.lua')
      assert.is_nil(err)
      assert.is_not_nil(content)
      assert.is_true(#content > 0)
    end)

    it('returns error for non-existent file', function()
      local cwd = vim.fn.getcwd()
      local content, err = git.get_file_content('HEAD', cwd .. '/does_not_exist.lua')
      assert.is_nil(content)
      assert.is_not_nil(err)
    end)

    it('returns error for non-git directory', function()
      local content, err = git.get_file_content('HEAD', '/tmp/some_file.txt')
      assert.is_nil(content)
      assert.is_not_nil(err)
    end)
  end)

  describe('get_relative_path', function()
    it('returns relative path within repo', function()
      local cwd = vim.fn.getcwd()
      local rel = git.get_relative_path(cwd .. '/lua/diffs/init.lua')
      assert.are.equal('lua/diffs/init.lua', rel)
    end)

    it('returns nil for non-git directory', function()
      local rel = git.get_relative_path('/tmp/some_file.txt')
      assert.is_nil(rel)
    end)
  end)
end)