local t = require('tests.harness')
local hermetic = require('tests.hermetic')

local MODULES = {
  'arti-pack',
  'arti-pack.spec',
  'arti-pack.fs',
  'arti-pack.archive',
  'arti-pack.lock',
  'arti-pack.installer',
}

local function shadow_plugin()
  local dir = vim.fn.tempname()
  vim.fn.mkdir(dir .. '/lua/arti-pack', 'p')
  vim.fn.writefile({ 'return { shadowed = true }' }, dir .. '/lua/arti-pack/spec.lua')
  vim.fn.writefile({ 'return { shadowed = true }' }, dir .. '/lua/arti-pack/init.lua')
  return dir
end

t.describe('test harness', function()
  t.it('loads every module from the repository', function()
    for _, name in ipairs(MODULES) do
      require(name)
      local source = hermetic.sources[name]
      t.truthy(source, name .. ' was not resolved by the repository loader')
      t.eq(hermetic.root, source:sub(1, #hermetic.root), name .. ' resolved outside the repository')
    end
  end)

  t.it('outranks an arti-pack installed on the runtimepath', function()
    local dir = shadow_plugin()
    vim.opt.runtimepath:prepend(dir)

    local ok, err = pcall(function()
      t.eq(dir .. '/lua/arti-pack/spec.lua', vim.api.nvim_get_runtime_file('lua/arti-pack/spec.lua', false)[1])

      for _, name in ipairs({ 'arti-pack', 'arti-pack.spec' }) do
        package.loaded[name] = nil
        t.falsy(require(name).shadowed, name .. ' came from the runtimepath copy')
        t.eq(hermetic.root, hermetic.sources[name]:sub(1, #hermetic.root))
      end
    end)

    vim.opt.runtimepath:remove(dir)
    vim.fn.delete(dir, 'rf')
    assert(ok, err)
  end)
end)