use tempfile::TempDir;
use std::fs;
use std::path::Path;

use anvil::templates::{TemplateManager, TemplateContext};
use anvil::project::config::ProjectConfig;

// ============================================================================
// Template extraction tests
// ============================================================================

#[test]
fn test_basic_template_extracts_all_expected_files() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "test_proj".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    let count = TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();
    assert!(count >= 16, "Expected at least 16 files, got {}", count);
}

#[test]
fn test_template_creates_sketch_directory() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "blink".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let sketch_dir = tmp.path().join("blink");
    assert!(sketch_dir.is_dir(), "Sketch directory should exist");

    let ino_file = sketch_dir.join("blink.ino");
    assert!(ino_file.exists(), "Sketch .ino file should exist");

    // Verify the .ino content has correct includes
    let content = fs::read_to_string(&ino_file).unwrap();
    assert!(
        content.contains("blink_app.h"),
        ".ino should include project-specific app header"
    );
    assert!(
        content.contains("hal_arduino.h"),
        ".ino should include hal_arduino.h"
    );
}

#[test]
fn test_template_creates_hal_files() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "sensor".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    assert!(
        tmp.path().join("lib/hal/hal.h").exists(),
        "hal.h should exist"
    );
    assert!(
        tmp.path().join("lib/hal/hal_arduino.h").exists(),
        "hal_arduino.h should exist"
    );

    // Verify hal.h defines the abstract Hal class
    let hal_content = fs::read_to_string(tmp.path().join("lib/hal/hal.h")).unwrap();
    assert!(
        hal_content.contains("class Hal"),
        "hal.h should define class Hal"
    );
    assert!(
        hal_content.contains("virtual void pinMode"),
        "hal.h should declare pinMode"
    );
}

#[test]
fn test_template_creates_app_header() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "my_sensor".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let app_path = tmp.path().join("lib/app/my_sensor_app.h");
    assert!(app_path.exists(), "App header should exist with project name");

    let content = fs::read_to_string(&app_path).unwrap();
    assert!(
        content.contains("#include <hal.h>"),
        "App header should include hal.h"
    );
    assert!(
        content.contains("class BlinkApp"),
        "App header should define BlinkApp class"
    );
}

#[test]
fn test_template_creates_test_infrastructure() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "blink".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    assert!(
        tmp.path().join("test/CMakeLists.txt").exists(),
        "CMakeLists.txt should exist"
    );
    assert!(
        tmp.path().join("test/test_unit.cpp").exists(),
        "test_unit.cpp should exist"
    );
    assert!(
        tmp.path().join("test/mocks/mock_hal.h").exists(),
        "mock_hal.h should exist"
    );
    assert!(
        tmp.path().join("test/mocks/sim_hal.h").exists(),
        "sim_hal.h should exist"
    );
    assert!(
        tmp.path().join("test/run_tests.sh").exists(),
        "run_tests.sh should exist"
    );
    assert!(
        tmp.path().join("test/run_tests.bat").exists(),
        "run_tests.bat should exist"
    );
}

#[test]
fn test_template_test_file_references_correct_app() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "motor_ctrl".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let test_content = fs::read_to_string(
        tmp.path().join("test/test_unit.cpp")
    ).unwrap();
    assert!(
        test_content.contains("motor_ctrl_app.h"),
        "Test file should include project-specific app header"
    );
}

#[test]
fn test_template_cmake_references_correct_project() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "my_bot".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let cmake = fs::read_to_string(
        tmp.path().join("test/CMakeLists.txt")
    ).unwrap();
    assert!(
        cmake.contains("my_bot"),
        "CMakeLists.txt should contain project name"
    );
}

#[test]
fn test_template_creates_dot_files() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "blink".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    assert!(
        tmp.path().join(".gitignore").exists(),
        ".gitignore should be created from _dot_ prefix"
    );
    assert!(
        tmp.path().join(".editorconfig").exists(),
        ".editorconfig should be created"
    );
    assert!(
        tmp.path().join(".clang-format").exists(),
        ".clang-format should be created"
    );
    assert!(
        tmp.path().join(".vscode/settings.json").exists(),
        ".vscode/settings.json should be created"
    );
}

#[test]
fn test_template_creates_readme() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "blink".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let readme = tmp.path().join("README.md");
    assert!(readme.exists(), "README.md should exist");

    let content = fs::read_to_string(&readme).unwrap();
    assert!(content.contains("blink"), "README should contain project name");
}

// ============================================================================
// .anvil.toml config tests
// ============================================================================

#[test]
fn test_template_creates_valid_config() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "blink".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    // Should be loadable by ProjectConfig
    let config = ProjectConfig::load(tmp.path()).unwrap();
    assert_eq!(config.project.name, "blink");
    assert_eq!(config.build.fqbn, "arduino:avr:uno");
    assert_eq!(config.monitor.baud, 115200);
    assert!(config.build.extra_flags.contains(&"-Werror".to_string()));
}

#[test]
fn test_config_roundtrip() {
    let tmp = TempDir::new().unwrap();
    let config = ProjectConfig::new("roundtrip_test");
    config.save(tmp.path()).unwrap();

    let loaded = ProjectConfig::load(tmp.path()).unwrap();
    assert_eq!(loaded.project.name, "roundtrip_test");
    assert_eq!(loaded.build.fqbn, config.build.fqbn);
    assert_eq!(loaded.monitor.baud, config.monitor.baud);
    assert_eq!(loaded.build.include_dirs, config.build.include_dirs);
}

#[test]
fn test_config_find_project_root_walks_up() {
    let tmp = TempDir::new().unwrap();
    let config = ProjectConfig::new("walk_test");
    config.save(tmp.path()).unwrap();

    // Create nested subdirectory
    let deep = tmp.path().join("sketch").join("src").join("deep");
    fs::create_dir_all(&deep).unwrap();

    let found = ProjectConfig::find_project_root(&deep).unwrap();
    let expected = tmp.path().canonicalize().unwrap();

    // On Windows, canonicalize() returns \\?\ extended path prefix.
    // Strip it for comparison since find_project_root may not include it.
    let found_str = found.to_string_lossy().to_string();
    let expected_str = expected.to_string_lossy().to_string();
    let norm = |s: &str| s.strip_prefix(r"\\?\").unwrap_or(s).to_string();
    assert_eq!(norm(&found_str), norm(&expected_str));
}

#[test]
fn test_config_resolve_include_flags() {
    let tmp = TempDir::new().unwrap();
    fs::create_dir_all(tmp.path().join("lib/hal")).unwrap();
    fs::create_dir_all(tmp.path().join("lib/app")).unwrap();

    let config = ProjectConfig::new("flags_test");
    let flags = config.resolve_include_flags(tmp.path());

    assert_eq!(flags.len(), 2);
    assert!(flags[0].starts_with("-I"));
    assert!(flags[0].ends_with("lib/hal") || flags[0].ends_with("lib\\hal"));
}

#[test]
fn test_config_skips_nonexistent_include_dirs() {
    let tmp = TempDir::new().unwrap();
    // Don't create the directories
    let config = ProjectConfig::new("missing_dirs");
    let flags = config.resolve_include_flags(tmp.path());
    assert_eq!(flags.len(), 0, "Should skip non-existent directories");
}

// ============================================================================
// Full project creation test (end-to-end in temp dir)
// ============================================================================

#[test]
fn test_full_project_structure() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "full_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    // Verify the complete expected file tree
    let expected_files = vec![
        ".anvil.toml",
        ".gitignore",
        ".editorconfig",
        ".clang-format",
        ".vscode/settings.json",
        "README.md",
        "full_test/full_test.ino",
        "lib/hal/hal.h",
        "lib/hal/hal_arduino.h",
        "lib/app/full_test_app.h",
        "build.sh",
        "build.bat",
        "upload.sh",
        "upload.bat",
        "monitor.sh",
        "monitor.bat",
        "_detect_port.ps1",
        "test/CMakeLists.txt",
        "test/test_unit.cpp",
        "test/run_tests.sh",
        "test/run_tests.bat",
        "test/mocks/mock_hal.h",
        "test/mocks/sim_hal.h",
    ];

    for f in &expected_files {
        let p = tmp.path().join(f);
        assert!(
            p.exists(),
            "Expected file missing: {} (checked {})",
            f,
            p.display()
        );
    }
}

#[test]
fn test_no_unicode_in_template_output() {
    // Eric's rule: only ASCII characters
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "ascii_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    // Check all generated text files for non-ASCII
    check_ascii_recursive(tmp.path());
}

fn check_ascii_recursive(dir: &Path) {
    for entry in fs::read_dir(dir).unwrap() {
        let entry = entry.unwrap();
        let path = entry.path();
        if path.is_dir() {
            check_ascii_recursive(&path);
        } else {
            // Only check text files
            let ext = path.extension().and_then(|e| e.to_str()).unwrap_or("");
            if matches!(ext, "h" | "cpp" | "ino" | "txt" | "sh" | "bat" | "json" | "toml" | "md") {
                let content = fs::read_to_string(&path).unwrap();
                for (line_num, line) in content.lines().enumerate() {
                    for (col, ch) in line.chars().enumerate() {
                        assert!(
                            ch.is_ascii(),
                            "Non-ASCII character '{}' (U+{:04X}) at {}:{}:{} ",
                            ch,
                            ch as u32,
                            path.display(),
                            line_num + 1,
                            col + 1
                        );
                    }
                }
            }
        }
    }
}

// ============================================================================
// Error case tests
// ============================================================================

#[test]
fn test_unknown_template_fails() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    let result = TemplateManager::extract("nonexistent", tmp.path(), &ctx);
    assert!(result.is_err());
}

#[test]
fn test_load_config_from_nonproject_fails() {
    let tmp = TempDir::new().unwrap();
    let result = ProjectConfig::load(tmp.path());
    assert!(result.is_err());
}

// ============================================================================
// Self-contained script tests
// ============================================================================

#[test]
fn test_template_creates_self_contained_scripts() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "standalone".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    // All six scripts must exist
    let scripts = vec![
        "build.sh", "build.bat",
        "upload.sh", "upload.bat",
        "monitor.sh", "monitor.bat",
    ];
    for script in &scripts {
        let p = tmp.path().join(script);
        assert!(p.exists(), "Script missing: {}", script);
    }
}

#[test]
fn test_build_sh_reads_anvil_toml() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "toml_reader".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join("build.sh")).unwrap();
    assert!(
        content.contains(".anvil.toml"),
        "build.sh should reference .anvil.toml"
    );
    assert!(
        content.contains("arduino-cli"),
        "build.sh should invoke arduino-cli"
    );
    assert!(
        !content.contains("anvil build"),
        "build.sh must NOT depend on the anvil binary"
    );
}

#[test]
fn test_upload_sh_reads_anvil_toml() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "uploader".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join("upload.sh")).unwrap();
    assert!(
        content.contains(".anvil.toml"),
        "upload.sh should reference .anvil.toml"
    );
    assert!(
        content.contains("arduino-cli"),
        "upload.sh should invoke arduino-cli"
    );
    assert!(
        content.contains("upload"),
        "upload.sh should contain upload command"
    );
    assert!(
        content.contains("--monitor"),
        "upload.sh should support --monitor flag"
    );
    assert!(
        !content.contains("anvil upload"),
        "upload.sh must NOT depend on the anvil binary"
    );
}

#[test]
fn test_monitor_sh_reads_anvil_toml() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "serial_mon".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join("monitor.sh")).unwrap();
    assert!(
        content.contains(".anvil.toml"),
        "monitor.sh should reference .anvil.toml"
    );
    assert!(
        content.contains("--watch"),
        "monitor.sh should support --watch flag"
    );
    assert!(
        !content.contains("anvil monitor"),
        "monitor.sh must NOT depend on the anvil binary"
    );
}

#[test]
fn test_scripts_have_shebangs() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "shebangs".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    for script in &["build.sh", "upload.sh", "monitor.sh", "test/run_tests.sh"] {
        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
        assert!(
            content.starts_with("#!/"),
            "{} should start with a shebang line",
            script
        );
    }
}

#[test]
fn test_scripts_no_anvil_binary_dependency() {
    // Critical: generated projects must NOT require the anvil binary
    // for build, upload, or monitor operations.
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "no_anvil_dep".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let scripts = vec![
        "build.sh", "build.bat",
        "upload.sh", "upload.bat",
        "monitor.sh", "monitor.bat",
        "test/run_tests.sh", "test/run_tests.bat",
    ];

    for script in &scripts {
        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
        // None of these scripts should shell out to anvil
        let has_anvil_cmd = content.lines().any(|line| {
            let trimmed = line.trim();
            // Skip comments, echo/print lines, and shell output functions
            if trimmed.starts_with('#')
                || trimmed.starts_with("::")
                || trimmed.starts_with("echo")
                || trimmed.starts_with("REM")
                || trimmed.starts_with("rem")
                || trimmed.starts_with("warn")
                || trimmed.starts_with("die")
            {
                return false;
            }
            // Check for "anvil " as a command invocation
            trimmed.contains("anvil ")
                && !trimmed.contains("anvil.toml")
                && !trimmed.contains("anvil.local")
                && !trimmed.contains("Anvil")
        });
        assert!(
            !has_anvil_cmd,
            "{} should not invoke the anvil binary (project must be self-contained)",
            script
        );
    }
}

#[test]
fn test_gitignore_excludes_build_cache() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "gitcheck".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join(".gitignore")).unwrap();
    assert!(
        content.contains(".build/"),
        ".gitignore should exclude .build/ (arduino-cli build cache)"
    );
    assert!(
        content.contains("test/build/"),
        ".gitignore should exclude test/build/ (cmake build cache)"
    );
    assert!(
        content.contains(".anvil.local"),
        ".gitignore should exclude .anvil.local (machine-specific config)"
    );
}

#[test]
fn test_readme_documents_self_contained_workflow() {
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "docs_check".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let readme = fs::read_to_string(tmp.path().join("README.md")).unwrap();
    assert!(
        readme.contains("./build.sh"),
        "README should document build.sh"
    );
    assert!(
        readme.contains("./upload.sh"),
        "README should document upload.sh"
    );
    assert!(
        readme.contains("./monitor.sh"),
        "README should document monitor.sh"
    );
    assert!(
        readme.contains("self-contained"),
        "README should mention self-contained"
    );
}

#[test]
fn test_scripts_tolerate_missing_toml_keys() {
    // Regression: toml_get must not kill the script when a key is absent.
    // With set -euo pipefail, bare grep returns exit 1 on no match,
    // pipefail propagates it, and set -e terminates silently.
    // Every grep in toml_get/toml_array must have "|| true".
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "grep_safe".to_string(),
        anvil_version: "1.0.0".to_string(),
    };

    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    for script in &["build.sh", "upload.sh", "monitor.sh"] {
        let content = fs::read_to_string(tmp.path().join(script)).unwrap();

        // If the script uses set -e (or -euo pipefail), then every
        // toml_get/toml_array function must guard grep with || true
        if content.contains("set -e") || content.contains("set -euo") {
            // Find the toml_get function body and check for || true
            let has_safe_grep = content.contains("|| true");
            assert!(
                has_safe_grep,
                "{} uses set -e but toml_get/toml_array lacks '|| true' guard. \
                 Missing TOML keys will silently kill the script.",
                script
            );
        }
    }
}

// ==========================================================================
// Batch script safety
// ==========================================================================

#[test]
fn test_bat_scripts_no_unescaped_parens_in_echo() {
    // Regression: unescaped ( or ) in echo lines inside if blocks
    // cause cmd.exe to misparse block boundaries.
    // e.g. "echo Configuring (first run)..." closes the if block early.
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "parens_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let bat_files = vec![
        "build.bat",
        "upload.bat",
        "monitor.bat",
        "test/run_tests.bat",
    ];

    for bat in &bat_files {
        let content = fs::read_to_string(tmp.path().join(bat)).unwrap();
        let mut in_if_block = 0i32;

        for (line_num, line) in content.lines().enumerate() {
            let trimmed = line.trim();

            // Track if-block nesting (rough heuristic)
            if trimmed.starts_with("if ") && trimmed.ends_with('(') {
                in_if_block += 1;
            }
            if trimmed == ")" {
                in_if_block -= 1;
            }

            // Inside if blocks, echo lines must not have bare ( or )
            if in_if_block > 0
                && (trimmed.starts_with("echo ") || trimmed.starts_with("echo."))
            {
                let msg_part = &trimmed[4..]; // after "echo"
                // Allow ^( and ^) which are escaped
                let unescaped_open = msg_part.matches('(').count()
                    - msg_part.matches("^(").count();
                let unescaped_close = msg_part.matches(')').count()
                    - msg_part.matches("^)").count();
                assert!(
                    unescaped_open == 0 && unescaped_close == 0,
                    "{} line {}: unescaped parentheses in echo inside if block: {}",
                    bat,
                    line_num + 1,
                    trimmed
                );
            }
        }
    }
}

// ==========================================================================
// .anvil.local references in scripts
// ==========================================================================

#[test]
fn test_scripts_read_anvil_local_for_port() {
    // upload and monitor scripts should read port from .anvil.local,
    // NOT from .anvil.toml.
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "local_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    for script in &["upload.sh", "upload.bat", "monitor.sh", "monitor.bat"] {
        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
        assert!(
            content.contains(".anvil.local"),
            "{} should reference .anvil.local for port config",
            script
        );
    }
}

#[test]
fn test_anvil_toml_template_has_no_port() {
    // Port config belongs in .anvil.local, not .anvil.toml
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "no_port".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join(".anvil.toml")).unwrap();
    for line in content.lines() {
        let trimmed = line.trim().trim_start_matches('#').trim();
        assert!(
            !trimmed.starts_with("port ")
                && !trimmed.starts_with("port=")
                && !trimmed.starts_with("port_windows")
                && !trimmed.starts_with("port_linux"),
            ".anvil.toml should not contain port entries, found: {}",
            line
        );
    }
}

// ==========================================================================
// _detect_port.ps1 integration
// ==========================================================================

#[test]
fn test_bat_scripts_call_detect_port_ps1() {
    // upload.bat and monitor.bat should delegate port detection to
    // _detect_port.ps1, not do inline powershell with { } braces
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "ps1_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    for bat in &["upload.bat", "monitor.bat"] {
        let content = fs::read_to_string(tmp.path().join(bat)).unwrap();
        assert!(
            content.contains("_detect_port.ps1"),
            "{} should call _detect_port.ps1 for port detection",
            bat
        );
    }
}

#[test]
fn test_detect_port_ps1_is_valid() {
    // Basic structural checks on the PowerShell helper
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "ps1_valid".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let content = fs::read_to_string(tmp.path().join("_detect_port.ps1")).unwrap();
    assert!(
        content.contains("arduino-cli board list --format json"),
        "_detect_port.ps1 should use arduino-cli JSON output"
    );
    assert!(
        content.contains("protocol_label"),
        "_detect_port.ps1 should check protocol_label for USB detection"
    );
    assert!(
        content.contains("VidPid"),
        "_detect_port.ps1 should support VID:PID resolution"
    );
}

// ==========================================================================
// Refresh command
// ==========================================================================

#[test]
fn test_refresh_freshly_extracted_is_up_to_date() {
    // A freshly extracted project should have all refreshable files
    // byte-identical to the template.
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "fresh_proj".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    let reference = TempDir::new().unwrap();
    TemplateManager::extract("basic", reference.path(), &ctx).unwrap();

    let refreshable = vec![
        "build.sh", "build.bat",
        "upload.sh", "upload.bat",
        "monitor.sh", "monitor.bat",
        "_detect_port.ps1",
        "test/run_tests.sh", "test/run_tests.bat",
    ];

    for f in &refreshable {
        let a = fs::read(tmp.path().join(f)).unwrap();
        let b = fs::read(reference.path().join(f)).unwrap();
        assert_eq!(a, b, "Freshly extracted {} should match template", f);
    }
}

#[test]
fn test_refresh_detects_modified_script() {
    // Tampering with a script should cause a byte mismatch
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "mod_proj".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    // Tamper with build.sh
    let build_sh = tmp.path().join("build.sh");
    let mut content = fs::read_to_string(&build_sh).unwrap();
    content.push_str("\n# user modification\n");
    fs::write(&build_sh, content).unwrap();

    // Compare with fresh template
    let reference = TempDir::new().unwrap();
    TemplateManager::extract("basic", reference.path(), &ctx).unwrap();

    let a = fs::read(tmp.path().join("build.sh")).unwrap();
    let b = fs::read(reference.path().join("build.sh")).unwrap();
    assert_ne!(a, b, "Modified build.sh should differ from template");

    // Non-modified file should still match
    let a = fs::read(tmp.path().join("upload.sh")).unwrap();
    let b = fs::read(reference.path().join("upload.sh")).unwrap();
    assert_eq!(a, b, "Untouched upload.sh should match template");
}

#[test]
fn test_refresh_does_not_list_user_files() {
    // .anvil.toml, source files, and config must never be refreshable.
    let never_refreshable = vec![
        ".anvil.toml",
        ".anvil.local",
        ".gitignore",
        ".editorconfig",
        ".clang-format",
        "README.md",
        "test/CMakeLists.txt",
        "test/test_unit.cpp",
        "test/mocks/mock_hal.h",
        "test/mocks/sim_hal.h",
    ];

    let refreshable = vec![
        "build.sh", "build.bat",
        "upload.sh", "upload.bat",
        "monitor.sh", "monitor.bat",
        "_detect_port.ps1",
        "test/run_tests.sh", "test/run_tests.bat",
    ];

    for uf in &never_refreshable {
        assert!(
            !refreshable.contains(uf),
            "{} must never be in the refreshable files list",
            uf
        );
    }
}

// ==========================================================================
// .anvil.local VID:PID in scripts
// ==========================================================================

#[test]
fn test_scripts_read_vid_pid_from_anvil_local() {
    // upload and monitor scripts should parse vid_pid from .anvil.local
    let tmp = TempDir::new().unwrap();
    let ctx = TemplateContext {
        project_name: "vidpid_test".to_string(),
        anvil_version: "1.0.0".to_string(),
    };
    TemplateManager::extract("basic", tmp.path(), &ctx).unwrap();

    for script in &["upload.sh", "upload.bat", "monitor.sh", "monitor.bat"] {
        let content = fs::read_to_string(tmp.path().join(script)).unwrap();
        assert!(
            content.contains("vid_pid") || content.contains("VidPid") || content.contains("VID_PID"),
            "{} should parse vid_pid from .anvil.local",
            script
        );
    }
}