#:package TimeWarp.Amuru@<latest-version>

#!/usr/bin/dotnet --
#:package TimeWarp.Amuru

using TimeWarp.Amuru;
using static System.Console;

// Default behavior - stream to console (like bash/PowerShell)
await Shell.Builder("npm", "install").RunAsync();

// Capture output when needed
var result = await Shell.Builder("git", "status").CaptureAsync();
if (result.Success)
{
    WriteLine($"Git says: {result.Stdout}");
}

// Stream large files without memory issues
await foreach (var line in Shell.Builder("tail", "-f", "/var/log/app.log").StreamStdoutAsync())
{
    WriteLine($"Log: {line}");
}

// Chain commands with pipelines
var result = await Shell.Builder("find", ".", "-name", "*.cs")
    .Pipe("grep", "async")
    .CaptureAsync();
WriteLine($"Found {result.Lines.Length} async files");

// Work with CommandOutput
var output = await Shell.Builder("docker", "ps").CaptureAsync();
WriteLine($"Exit code: {output.ExitCode}");
WriteLine($"Success: {output.Success}");
WriteLine($"Stdout: {output.Stdout}");
WriteLine($"Stderr: {output.Stderr}");
WriteLine($"Combined: {output.Combined}");

// Use the fluent builder API for complex commands
var result = await Shell.Builder("git")
    .WithArguments("log", "--oneline", "-n", "10")
    .WithWorkingDirectory("/my/repo")
    .WithCancellationToken(cancellationToken)
    .CaptureAsync();

// Provide standard input to commands
var grepResult = await Shell.Builder("grep")
    .WithArguments("pattern")
    .WithStandardInput("line1\nline2 with pattern\nline3")
    .CaptureAsync();

// Interactive selection with Fzf
var selectedFile = await Fzf.Builder()
    .FromInput("file1.txt", "file2.txt", "file3.txt")
    .WithPreview("cat {}")
    .SelectAsync();

// Interactive pipeline - find and select files
var chosenFile = await Shell.Builder("find")
    .WithArguments(".", "-name", "*.cs")
    .Pipe("fzf", "--preview", "head -20 {}")
    .SelectAsync();

// Full interactive mode for stream-based tools (fzf, REPLs)
await Shell.Builder("fzf")
    .PassthroughAsync();

// TUI applications (vim, nano, edit) need true TTY passthrough
await Shell.Builder("vim")
    .WithArguments("myfile.txt")
    .TtyPassthroughAsync();

// Global dotnet options
var sdks = await DotNet.WithListSdks().CaptureAsync();
var runtimes = await DotNet.WithListRuntimes().CaptureAsync();
var version = await DotNet.WithVersion().CaptureAsync();

// Base builder for custom arguments
var result = await DotNet.Builder()
    .WithArguments("--list-sdks")
    .CaptureAsync();

// Build and test with streaming output
await DotNet.Build()
    .WithConfiguration("Release")
    .RunAsync();

await DotNet.Test()
    .WithFilter("Category=Unit")
    .RunAsync();

// Without When() - breaks the fluent chain
DotNetAddPackageBuilder builder = DotNet.AddPackage(packageName);
if (version != null)
{
    builder = builder.WithVersion(version);
}
else
{
    builder = builder.WithPrerelease();
}
await builder.CaptureAsync();

// With When() - keeps the fluent chain intact
await DotNet.AddPackage(packageName)
    .WithProject(projectFile)
    .When(version != null, b => b.WithVersion(version!))
    .When(version == null, b => b.WithPrerelease())
    .CaptureAsync();

// Works with all builders
await Shell.Builder("git")
    .WithArguments("push")
    .When(force, b => b.WithArguments("--force"))
    .When(dryRun, b => b.WithArguments("--dry-run"))
    .When(workDir != null, b => b.WithWorkingDirectory(workDir!))
    .RunAsync();

.When(version != null, b => b.WithVersion(version!))

.WhenNotNull(version, (b, v) => b.WithVersion(v))  // Cleaner than When!

.Unless(isProduction, b => b.WithVerbose())

static DotNetBuildBuilder AddProductionSettings(DotNetBuildBuilder b) =>
  b.WithConfiguration("Release").WithNoRestore();

await DotNet.Build()
  .Apply(AddProductionSettings)
  .RunAsync();

.ForEach(sources, (b, source) => b.WithSource(source))

.Tap(b => Console.WriteLine($"Building with config: {b}"))

// RunAsync() - Default shell behavior, streams to console
await Shell.Builder("npm", "install").RunAsync();
// Returns: exit code (int)
// Console output: real-time streaming

// CaptureAsync() - Silent execution with full output capture
var result = await Shell.Builder("git", "status").CaptureAsync();
// Returns: CommandOutput with all streams
// Console output: none (silent)

// PassthroughAsync() - Stream-based interactive tools (fzf, REPLs)
await Shell.Builder("fzf").PassthroughAsync();
// Returns: ExecutionResult
// Console output: piped through Console streams

// TtyPassthroughAsync() - True TTY for TUI applications (vim, nano, edit)
await Shell.Builder("vim", "file.txt").TtyPassthroughAsync();
// Returns: ExecutionResult
// Console output: inherits parent TTY (required for TUI apps)

// SelectAsync() - Selection tools (shows UI, captures selection)
var selected = await Fzf.Builder()
    .FromInput("option1", "option2")
    .SelectAsync();
// Returns: selected string
// Console output: UI on stderr, selection captured from stdout

var output = await Shell.Builder("docker", "ps").CaptureAsync();

// Access individual streams
Console.WriteLine($"Stdout: {output.Stdout}");
Console.WriteLine($"Stderr: {output.Stderr}");
Console.WriteLine($"Combined: {output.Combined}"); // Both in chronological order

// Check status
Console.WriteLine($"Exit code: {output.ExitCode}");
Console.WriteLine($"Success: {output.Success}"); // ExitCode == 0

// Convenience properties for line processing
foreach (var line in output.Lines) // Combined.Split('\n')
{
    ProcessLine(line);
}

// Stream lines as they arrive (no buffering)
await foreach (var line in Shell.Builder("tail", "-f", "/var/log/app.log")
    .StreamStdoutAsync(cancellationToken))
{
    Console.WriteLine($"Log: {line}");
}

// Stream with LINQ-style processing
var errorLines = Shell.Builder("cat", "huge.log")
    .StreamStdoutAsync()
    .Where(line => line.Contains("ERROR"))
    .Take(100);

await foreach (var error in errorLines)
{
    LogError(error);
}

// Shells don't cache - neither do we
await Shell.Builder("date").RunAsync();  // Shows current time
await Shell.Builder("date").RunAsync();  // Shows NEW current time

// If you need caching, it's trivial in C#:
private static CommandOutput? cachedResult;
var result = cachedResult ??= await Shell.Builder("expensive-command").CaptureAsync();

// Throws CommandExecutionException on non-zero exit code
await Shell.Builder("ls", "/nonexistent").RunAsync();

// CaptureAsync also throws on failure by default
var result = await Shell.Builder("git", "invalid-command").CaptureAsync();

// Disable validation for graceful degradation
var result = await Shell.Builder("ls", "/nonexistent")
    .WithValidation(CommandResultValidation.None)
    .CaptureAsync();

if (!result.Success)
{
    Console.WriteLine($"Command failed with exit code: {result.ExitCode}");
    Console.WriteLine($"Error: {result.Stderr}");
}

// With explicit cancellation token
var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));
await Shell.Builder("long-running-command")
    .RunAsync(cts.Token);

// With timeout via builder
await Shell.Builder("slow-command")
    .WithTimeout(TimeSpan.FromSeconds(10))
    .RunAsync();

// Timeout and external token are combined
await Shell.Builder("another-command")
    .WithTimeout(TimeSpan.FromSeconds(5))
    .RunAsync(userCancellationToken);

// Set up mock commands for testing
CliConfiguration.SetCommandPath("fzf", "/path/to/mock/fzf");
CliConfiguration.SetCommandPath("git", "/path/to/mock/git");

// Your code using these commands will now use the mocks
var selected = await Fzf.Builder()
    .FromInput("option1", "option2", "option3")
    .SelectAsync(); // Uses mock fzf

var status = await Shell.Builder("git", "status")
    .CaptureAsync(); // Uses mock git

// Clean up after tests
CliConfiguration.Reset();

// Create a simple mock script
File.WriteAllText("/tmp/mock-fzf", "#!/bin/bash\necho 'mock-selection'");
await Shell.Builder("chmod", "+x", "/tmp/mock-fzf").RunAsync();

// Configure TimeWarp.Amuru to use it
CliConfiguration.SetCommandPath("fzf", "/tmp/mock-fzf");

// Now SelectAsync will use the mock
var selected = await Fzf.Builder()
    .FromInput("a", "b", "c")
    .SelectAsync(); // Returns "mock-selection"