local test_samurai = require("test-samurai")
local core = require("test-samurai.core")
local util = require("test-samurai.util")

local orig_find_root = util.find_root
local orig_fs_stat = vim.loop.fs_stat
local orig_readfile = vim.fn.readfile

describe("test-samurai core", function()
  before_each(function()
    test_samurai.setup()
    util.find_root = orig_find_root
    vim.loop.fs_stat = orig_fs_stat
    vim.fn.readfile = orig_readfile
  end)

  it("selects Go runner for _test.go files", function()
    local bufnr = vim.api.nvim_create_buf(false, true)
    vim.api.nvim_buf_set_name(bufnr, "/tmp/foo_test.go")
    local runner = core.get_runner_for_buf(bufnr)
    assert.is_not_nil(runner)
    assert.equals("go", runner.name)
  end)

  it("does not fallback to Go runner when no runners are configured", function()
    test_samurai.setup({ runner_modules = {} })
    local bufnr = vim.api.nvim_create_buf(false, true)
    vim.api.nvim_buf_set_name(bufnr, "/tmp/no_runner_test.go")
    local runner = core.get_runner_for_buf(bufnr)
    assert.is_nil(runner)
  end)

  it("selects JS jest runner for *.test.ts files", function()
    local bufnr = vim.api.nvim_create_buf(false, true)
    vim.api.nvim_buf_set_name(bufnr, "/tmp/foo.test.ts")
    vim.bo[bufnr].filetype = "typescript"

    local runner = core.get_runner_for_buf(bufnr)
    assert.is_not_nil(runner)
    assert.equals("js-jest", runner.name)
  end)

  it("prefers mocha runner when mocha is in package.json", function()
    util.find_root = function(_, _)
      return "/tmp/mocha_proj"
    end

    vim.loop.fs_stat = function(path)
      if path == "/tmp/mocha_proj/package.json" then
        return { type = "file" }
      end
      return nil
    end

    vim.fn.readfile = function(path)
      if path == "/tmp/mocha_proj/package.json" then
        return {
          "{",
          '  "devDependencies": { "mocha": "^10.0.0" }',
          "}",
        }
      end
      return {}
    end

    test_samurai.setup()

    local bufnr = vim.api.nvim_create_buf(false, true)
    vim.api.nvim_buf_set_name(bufnr, "/tmp/mocha_proj/foo.test.ts")
    vim.bo[bufnr].filetype = "typescript"

    local runner = core.get_runner_for_buf(bufnr)

    util.find_root = orig_find_root
    vim.loop.fs_stat = orig_fs_stat
    vim.fn.readfile = orig_readfile

    assert.is_not_nil(runner)
    assert.equals("js-mocha", runner.name)
  end)
end)