local actions = require("telescope.actions")

local action_state = require "telescope.actions.state"

local interactive_rebase = function(prompt_bufnr)
    local selection = action_state.get_selected_entry()
    -- Use vim-fugitive for the rebase
    vim.cmd('Git rebase -i ' .. selection.name)
end

require("telescope").setup{
  extensions = {
    coc = {
        theme = 'ivy',
        prefer_locations = true, -- always use Telescope locations to preview definitions/declarations/implementations etc
    }
  },
  defaults = {
    mappings = {
      i = {
        ["<esc>"] = actions.close,
        ["<C-u>"] = false,
      },
    },
    theme = "ivy",
  },
  pickers = {
      git_branches = {
          mappings = {
              i = {
                  ["<C-b>"] = interactive_rebase,
              },
          },
      },
  },
}

-- Implement delta as previewer for diffs

local previewers = require('telescope.previewers')
local builtin = require('telescope.builtin')
local conf = require('telescope.config')
local E = {}

local delta = previewers.new_termopen_previewer {
  get_command = function(entry)
    -- this is for status
    -- You can get the AM things in entry.status. So we are displaying file if entry.status == '??' or 'A '
    -- just do an if and return a different command
    if entry.status == '??' or 'A ' then
      return { 'git', '-c', 'core.pager=delta', '-c', 'delta.side-by-side=false', 'diff', entry.value }
    end

    -- note we can't use pipes
    -- this command is for git_commits and git_bcommits
    return { 'git', '-c', 'core.pager=delta', '-c', 'delta.side-by-side=false', 'diff', entry.value .. '^!' }

  end
}

E.my_git_commits = function(opts)
  opts = opts or {}
  opts.previewer = delta

  builtin.git_commits(opts)
end

E.my_git_bcommits = function(opts)
  opts = opts or {}
  opts.previewer = delta

  builtin.git_bcommits(opts)
end

E.my_git_status = function(opts)
  opts = opts or {}
  opts.previewer = delta

  builtin.git_status(opts)
end

E.my_git_branches = function(opts)
  opts = opts or {}
  opts.previewer = delta

  builtin.git_branches(opts)
end

E.project_files = function()
  local opts = {} -- define here if you want to define something
  vim.fn.system('git rev-parse --is-inside-work-tree')
  if vim.v.shell_error == 0 then
    require"telescope.builtin".git_files(opts)
  else
    require"telescope.builtin".find_files(opts)
  end
end

return E