package shellrunner_test

import (
	"testing"
	"time"

	shellrunner "git.iamthefij.com/iamthefij/go-shell-runner"
)

func TestShellRunnerNoCallback(t *testing.T) {
	cases := []struct {
		command    string
		output     string
		ReturnCode int
	}{
		{"echo hello world", "hello world\n", 0},
		{"echo hello world && exit 1", "hello world\n", 1},
	}

	for _, c := range cases {
		c := c
		t.Run(c.command, func(t *testing.T) {
			t.Parallel()

			runner := shellrunner.NewShellRunner()
			runner.Start()

			// Test command without callback
			if err := runner.AddCommand(c.command, nil); err != nil {
				t.Fatalf("unexpected error adding command: %v", err)
			}

			runner.Stop()

			result := runner.GetResults()
			if result == nil || result.Output != c.output || result.ReturnCode != c.ReturnCode {
				t.Fatalf("expected output '%s' and return code %d, got '%s' and %d", c.output, c.ReturnCode, result.Output, result.ReturnCode)
			}
		})
	}
}

func TestShellRunnerCallback(t *testing.T) {
	t.Parallel()

	runner := shellrunner.NewShellRunner()
	runner.Start()

	// Test command with callback
	done := make(chan struct{})

	callbackReached := false

	if err := runner.AddCommand("echo callback test", func(result *shellrunner.CommandResult) {
		callbackReached = true
		if result.Output != "callback test\n" {
			t.Fatalf("expected 'callback test', got '%s'", result.Output)
		}
		close(done)
	}); err != nil {
		t.Fatalf("unexpected error adding command: %v", err)
	}

	// Timeout waiting for callback
	select {
	case <-done:
	case <-time.After(2 * time.Second):
		t.Fatal("callback timed out")
	}

	if !callbackReached {
		t.Fatal("callback was not reached")
	}

	runner.Stop()

	// Make sure stop and kill both exit gracefully after the runner is stopped
	runner.Stop()
	runner.Stop()
}

func TestShellRunnerKillWithTimeout(t *testing.T) {
	t.Parallel()

	runner := shellrunner.NewShellRunner()
	runner.Start()

	// Test command with callback
	callbackReached := false

	if err := runner.AddCommand("sleep 10 && echo callback test", func(result *shellrunner.CommandResult) {
		callbackReached = true
		if result.Output != "callback test\n" {
			t.Fatalf("expected 'callback test', got '%s'", result.Output)
		}
	}); err != nil {
		t.Fatalf("unexpected error adding command: %v", err)
	}

	// Wait one second to make sure the command starts running
	time.Sleep(1 * time.Second)

	if err := runner.KillWithTimeout(1 * time.Second); err == nil {
		t.Fatal("expected error when killing commands, but got none")
	}

	if callbackReached {
		t.Fatal("callback was reached before kill")
	}
}

func TestStopPreventsNewCommands(t *testing.T) {
	runner := shellrunner.NewShellRunner()
	runner.Start()

	runner.Stop()

	err := runner.AddCommand("echo should not run", nil)
	if err == nil {
		t.Fatal("expected error when adding command after stop, but got none")
	}
}