//! LLM prompt templates and language conversion utilities.

use crate::types::Language;

/// Default system prompt when no vocabulary is provided.
pub const DEFAULT_SYSTEM_PROMPT: &str = r#"You are a security code analyzer. Extract security-relevant claims from the provided code.

Focus on:
- TLS/SSL configuration (verification, minimum versions, cipher suites)
- Authentication settings (password policies, session management, MFA)
- Cryptography (algorithms, key sizes, modes, IVs)
- Input validation (SQL injection, command injection, XSS)
- API security (rate limiting, CORS, CSRF)
- Secrets management (hardcoded credentials, API keys)
- Configuration issues (debug modes, verbose errors)

For each claim found, provide:
- subject: A normalized concept path (e.g., "tls/cert_verification", "auth/password_min_length")
- predicate: The aspect being claimed (e.g., "enabled", "min_length", "algorithm")
- value: The actual value found
- value_type: One of "text", "number", "boolean"
- line: Line number where found (1-indexed)
- matched_text: The exact code that contains this claim (single line)
- confidence: How confident you are (0.0-1.0)
- description: Brief explanation of the security implications

Respond with JSON only, no markdown:
{
  "claims": [
    {
      "subject": "tls/cert_verification",
      "predicate": "enabled",
      "value": false,
      "value_type": "boolean",
      "line": 42,
      "matched_text": "verify=False",
      "confidence": 0.95,
      "description": "TLS certificate verification disabled, vulnerable to MITM attacks"
    }
  ]
}

If no security claims are found, return: {"claims": []}"#;

/// Convert Language enum to a concept path prefix.
pub fn language_to_prefix(language: Language) -> &'static str {
    match language {
        Language::Rust => "rust",
        Language::Go => "go",
        Language::Python => "python",
        Language::JavaScript => "javascript",
        Language::TypeScript => "typescript",
        Language::C => "c",
        Language::Cpp => "cpp",
        Language::Java => "java",
        Language::Php => "php",
        Language::Ruby => "ruby",
        Language::CSharp => "csharp",
        Language::Toml => "toml",
        Language::Yaml => "yaml",
        Language::Json => "json",
        Language::Ini => "ini",
        Language::Properties => "properties",
        Language::Docker => "docker",
        Language::Dotenv => "env",
        Language::CargoManifest => "cargo",
        Language::GoMod => "gomod",
        Language::NpmManifest => "npm",
        Language::PythonManifest => "python",
        Language::Terraform => "terraform",
        Language::Unknown => "unknown",
    }
}

/// Convert Language enum to human-readable name.
pub fn language_to_name(language: Language) -> &'static str {
    match language {
        Language::Rust => "Rust",
        Language::Go => "Go",
        Language::Python => "Python",
        Language::JavaScript => "JavaScript",
        Language::TypeScript => "TypeScript",
        Language::C => "C",
        Language::Cpp => "C++",
        Language::Java => "Java",
        Language::Php => "PHP",
        Language::Ruby => "Ruby",
        Language::CSharp => "C#",
        Language::Toml => "TOML",
        Language::Yaml => "YAML",
        Language::Json => "JSON",
        Language::Ini => "INI",
        Language::Properties => "Properties",
        Language::Docker => "Dockerfile",
        Language::Dotenv => "Environment file",
        Language::CargoManifest => "Cargo manifest",
        Language::GoMod => "Go module",
        Language::NpmManifest => "NPM manifest",
        Language::PythonManifest => "Python manifest",
        Language::Terraform => "Terraform",
        Language::Unknown => "Unknown",
    }
}

/// Convert Language enum to file extension for code block.
pub fn language_to_extension(language: Language) -> &'static str {
    match language {
        Language::Rust => "rust",
        Language::Go => "go",
        Language::Python => "python",
        Language::JavaScript => "javascript",
        Language::TypeScript => "typescript",
        Language::C => "c",
        Language::Cpp => "cpp",
        Language::Java => "java",
        Language::Php => "php",
        Language::Ruby => "ruby",
        Language::CSharp => "csharp",
        Language::Toml => "toml",
        Language::Yaml => "yaml",
        Language::Json => "json",
        Language::Ini => "ini",
        Language::Properties => "properties",
        Language::Docker => "dockerfile",
        Language::Dotenv => "env",
        Language::CargoManifest => "toml",
        Language::GoMod => "go",
        Language::NpmManifest => "json",
        Language::PythonManifest => "toml",
        Language::Terraform => "hcl",
        Language::Unknown => "",
    }
}

/// Extract JSON from a response that may contain markdown code blocks.
pub fn extract_json(response: &str) -> &str {
    let trimmed = response.trim();

    // If it starts with {, assume it's already JSON
    if trimmed.starts_with('{') {
        return trimmed;
    }

    // Try to find JSON in markdown code block
    if let Some(start) = trimmed.find("```json") {
        let after_marker = &trimmed[start + 7..];
        if let Some(end) = after_marker.find("```") {
            return after_marker[..end].trim();
        }
    }

    // Try generic code block
    if let Some(start) = trimmed.find("```") {
        let after_marker = &trimmed[start + 3..];
        // Skip language identifier if present
        let content = if let Some(newline) = after_marker.find('\n') {
            &after_marker[newline + 1..]
        } else {
            after_marker
        };
        if let Some(end) = content.find("```") {
            return content[..end].trim();
        }
    }

    trimmed
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_extract_json_plain() {
        let json = r#"{"claims": []}"#;
        assert_eq!(extract_json(json), json);
    }

    #[test]
    fn test_extract_json_markdown_code_block() {
        let response = r#"Here's the analysis:

```json
{"claims": []}
```

That's all I found."#;
        assert_eq!(extract_json(response), r#"{"claims": []}"#);
    }

    #[test]
    fn test_extract_json_generic_code_block() {
        let response = r#"```
{"claims": []}
```"#;
        assert_eq!(extract_json(response), r#"{"claims": []}"#);
    }

    #[test]
    fn test_language_to_prefix() {
        assert_eq!(language_to_prefix(Language::Rust), "rust");
        assert_eq!(language_to_prefix(Language::Python), "python");
        assert_eq!(language_to_prefix(Language::Go), "go");
    }
}