package platform

import (
	"context"
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
)

func TestStreamExecOutputWritesLiveFileIncrementally(t *testing.T) {
	dir := t.TempDir()
	livePath := filepath.Join(dir, "job.log")

	cmd := satExecCommand("printf", "line1\nline2\n")
	out, err := streamExecOutput(cmd, nil, livePath)
	if err != nil {
		t.Fatalf("streamExecOutput error: %v", err)
	}
	if string(out) != "line1\nline2\n" {
		t.Fatalf("out=%q want %q", out, "line1\nline2\n")
	}
	got, err := os.ReadFile(livePath)
	if err != nil {
		t.Fatalf("ReadFile(livePath): %v", err)
	}
	if string(got) != "line1\nline2\n" {
		t.Fatalf("livePath content=%q want %q", got, "line1\nline2\n")
	}
}

func TestStreamExecOutputSkipsLiveFileWhenPathEmpty(t *testing.T) {
	cmd := satExecCommand("printf", "line1\n")
	out, err := streamExecOutput(cmd, nil, "")
	if err != nil {
		t.Fatalf("streamExecOutput error: %v", err)
	}
	if string(out) != "line1\n" {
		t.Fatalf("out=%q want %q", out, "line1\n")
	}
}

func TestRunSATCommandCtxWritesLivePath(t *testing.T) {
	dir := t.TempDir()
	verboseLog := filepath.Join(dir, "verbose.log")
	livePath := filepath.Join(dir, "job.log")

	oldExecCommand := satExecCommand
	satExecCommand = func(name string, args ...string) *exec.Cmd {
		return exec.Command(name, args...)
	}
	t.Cleanup(func() { satExecCommand = oldExecCommand })

	out, err := runSATCommandCtx(context.Background(), verboseLog, "job", []string{"printf", "hello\n"}, nil, nil, livePath)
	if err != nil {
		t.Fatalf("runSATCommandCtx error: %v", err)
	}
	if string(out) != "hello\n" {
		t.Fatalf("out=%q want %q", out, "hello\n")
	}
	got, err := os.ReadFile(livePath)
	if err != nil {
		t.Fatalf("ReadFile(livePath): %v", err)
	}
	if string(got) != "hello\n" {
		t.Fatalf("livePath content=%q want %q", got, "hello\n")
	}
}

func TestRunAcceptancePackCtxInvokesJobBoundaryHook(t *testing.T) {
	old := satJobBoundaryHook
	t.Cleanup(func() { satJobBoundaryHook = old })

	var seen []string
	SetJobBoundaryHook(func(jobName string) {
		seen = append(seen, jobName)
	})

	oldExecCommand := satExecCommand
	satExecCommand = func(name string, args ...string) *exec.Cmd {
		return exec.Command(name, args...)
	}
	t.Cleanup(func() { satExecCommand = oldExecCommand })

	dir := t.TempDir()
	_, err := runAcceptancePackCtx(context.Background(), dir, "test-pack", []satJob{
		{name: "01-a.log", cmd: []string{"printf", "a\n"}},
		{name: "02-b.log", cmd: []string{"printf", "b\n"}},
	}, nil)
	if err != nil {
		t.Fatalf("runAcceptancePackCtx error: %v", err)
	}

	if len(seen) != 2 || seen[0] != "01-a.log" || seen[1] != "02-b.log" {
		t.Fatalf("seen=%v want [01-a.log 02-b.log]", seen)
	}
}

func TestRunAcceptancePackCtxInvokesSyncBracketHookOnlyForMarkedJobs(t *testing.T) {
	old := satSyncBracketHook
	t.Cleanup(func() { satSyncBracketHook = old })

	var calls []string
	SetSyncBracketHook(func(jobName, phase string) error {
		calls = append(calls, jobName+":"+phase)
		return nil
	})

	oldExecCommand := satExecCommand
	satExecCommand = func(name string, args ...string) *exec.Cmd {
		return exec.Command(name, args...)
	}
	t.Cleanup(func() { satExecCommand = oldExecCommand })

	dir := t.TempDir()
	_, err := runAcceptancePackCtx(context.Background(), dir, "test-pack", []satJob{
		{name: "01-inventory.log", cmd: []string{"printf", "a\n"}},
		{name: "02-load.log", cmd: []string{"printf", "b\n"}, syncBracket: true},
	}, nil)
	if err != nil {
		t.Fatalf("runAcceptancePackCtx error: %v", err)
	}

	want := []string{"02-load.log:before", "02-load.log:after"}
	if len(calls) != len(want) {
		t.Fatalf("calls=%v want %v", calls, want)
	}
	for i := range want {
		if calls[i] != want[i] {
			t.Fatalf("calls=%v want %v", calls, want)
		}
	}
}

func TestRunSyncBracketHookLogsErrorWithoutFailingJob(t *testing.T) {
	old := satSyncBracketHook
	t.Cleanup(func() { satSyncBracketHook = old })
	SetSyncBracketHook(func(jobName, phase string) error {
		return fmt.Errorf("blackbox target unreachable")
	})

	var logged []string
	runSyncBracketHook(satJob{name: "02-load.log", syncBracket: true}, "before", func(line string) {
		logged = append(logged, line)
	})

	if len(logged) != 1 || !strings.Contains(logged[0], "02-load.log") || !strings.Contains(logged[0], "blackbox target unreachable") {
		t.Fatalf("logged=%v want a single line naming the job and the error", logged)
	}
}