//! Integration tests for M3.7.8 symptom projection
//!
//! Validates that user queries normalize deterministically and can match
//! extracted failure signatures from M3.7.7.

use mem_core::project_symptom;

#[test]
fn a1_same_symptom_same_hash() {
    // Multiple query formulations should normalize to the same sym_sha
    let q1 = "npm ERR! ERESOLVE unable to resolve typescript";
    let q2 = "npm error: eresolve dependency tree";
    let q3 = "cannot resolve typescript (npm)";

    let sym1 = project_symptom("npm", q1);
    let sym2 = project_symptom("npm", q2);
    let sym3 = project_symptom("npm", q3);

    // All should produce identical hashes
    assert_eq!(sym1.sym_sha, sym2.sym_sha, "q1 and q2 should hash identically");
    assert_eq!(sym2.sym_sha, sym3.sym_sha, "q2 and q3 should hash identically");

    // Verify they're not empty
    assert!(!sym1.sym_sha.is_empty());
    assert_eq!(sym1.sym_sha.len(), 64, "SHA256 should be 64 hex chars");
}

#[test]
fn a2_abbrev_expansion() {
    // ERESOLVE, ERR, OOM, EACCES should expand correctly per tool
    let cases = vec![
        ("npm", "npm ERESOLVE error", "resolve"),
        ("npm", "npm ERR unable to resolve", "error"),
        ("cargo", "error E0599 no method", "e0599"),
        ("cargo", "E0308 type mismatch", "e0308"),
        ("kubectl", "error CRD not found", "custom"),
    ];

    for (tool, query, expected_substring) in cases {
        let symptom = project_symptom(tool, query);
        assert!(
            symptom.normalised.contains(expected_substring),
            "Query '{}' (tool {}) should contain '{}' after expansion, got: {}",
            query,
            tool,
            expected_substring,
            symptom.normalised
        );
    }
}

#[test]
fn a3_stop_word_removal() {
    // Stop words (able, to, the, of, etc.) should be removed
    let query = "npm is unable to resolve the typescript dependency tree";
    let symptom = project_symptom("npm", query);

    // These specific stop words should NOT appear
    let stop_words_to_check = vec!["is", "unable", "to", "the", "of"];
    for stop in stop_words_to_check {
        // Check that the stop word is NOT in the normalized form
        let has_stop = symptom.normalised.split_whitespace().any(|w| w == stop);
        assert!(!has_stop, "Stop word '{}' should be removed, got: {}", stop, symptom.normalised);
    }

    // Key terms should remain
    assert!(
        symptom.normalised.contains("resolve"),
        "Should contain 'resolve'"
    );
    assert!(
        symptom.normalised.contains("dependency"),
        "Should contain 'dependency'"
    );
    assert!(
        symptom.normalised.contains("typescript"),
        "Should contain 'typescript'"
    );
}

#[test]
fn a4_tool_consistency() {
    // Same error text under different tools should produce different hashes
    let query = "error 1234 module not found";

    let sym_npm = project_symptom("npm", query);
    let sym_cargo = project_symptom("cargo", query);
    let sym_kubectl = project_symptom("kubectl", query);

    // All should have different hashes (tool name is part of identity)
    assert_ne!(
        sym_npm.sym_sha, sym_cargo.sym_sha,
        "npm and cargo should have different signatures"
    );
    assert_ne!(
        sym_cargo.sym_sha, sym_kubectl.sym_sha,
        "cargo and kubectl should have different signatures"
    );
    assert_ne!(
        sym_npm.sym_sha, sym_kubectl.sym_sha,
        "npm and kubectl should have different signatures"
    );

    // Verify tool field
    assert_eq!(sym_npm.tool, "npm");
    assert_eq!(sym_cargo.tool, "cargo");
    assert_eq!(sym_kubectl.tool, "kubectl");
}

#[test]
fn a5_case_insensitive() {
    // "NPM ERROR" should hash identically to "npm error"
    let q1 = project_symptom("npm", "NPM ERROR ERESOLVE");
    let q2 = project_symptom("npm", "npm error eresolve");
    let q3 = project_symptom("npm", "NpM eRrOr ErEsOlVe");

    assert_eq!(q1.sym_sha, q2.sym_sha, "Uppercase and lowercase should hash identically");
    assert_eq!(q2.sym_sha, q3.sym_sha, "Mixed case should also hash identically");
}

#[test]
fn a6_keyword_order_irrelevant() {
    // "error npm resolve" should hash same as "npm resolve error"
    // (keywords are sorted alphabetically before hashing)
    let q1 = project_symptom("npm", "error npm resolve typescript");
    let q2 = project_symptom("npm", "npm typescript resolve error");
    let q3 = project_symptom("npm", "typescript error npm resolve");

    assert_eq!(
        q1.sym_sha, q2.sym_sha,
        "Different keyword order should hash identically"
    );
    assert_eq!(
        q2.sym_sha, q3.sym_sha,
        "All permutations should hash identically"
    );

    // But the normalised form should be sorted
    let expected_sorted = "error npm resolve typescript";
    assert_eq!(q1.normalised, expected_sorted, "Should be sorted alphabetically");
}

#[test]
fn test_matches_signature() {
    // SymptomVector::matches_signature should compare sym_sha
    let symptom = project_symptom("npm", "npm error resolve dependency");

    assert!(
        symptom.matches_signature(&symptom.sym_sha),
        "Should match its own signature"
    );
    assert!(
        !symptom.matches_signature("different_hash_value"),
        "Should not match different hash"
    );
    assert!(
        !symptom.matches_signature(&symptom.sym_sha[0..32]),
        "Should not match partial hash"
    );
}

#[test]
fn test_npm_real_world_scenarios() {
    // Real-world npm error scenarios
    let queries = vec![
        "npm ERR! code ERESOLVE",
        "npm ERR! ERESOLVE unable to resolve dependency tree",
        "npm error: cannot find module @types/node",
        "npm E404 not found",
        "permission denied (EACCES) npm ERR!",
    ];

    for query in &queries {
        let symptom = project_symptom("npm", query);
        assert!(!symptom.sym_sha.is_empty(), "Query '{}' produced empty hash", query);
        assert_eq!(symptom.tool, "npm");
        assert!(!symptom.normalised.is_empty());
        assert!(symptom.confidence > 0.0);
    }
}

#[test]
fn test_cargo_real_world_scenarios() {
    // Real-world cargo error scenarios
    let queries = vec![
        "error E0599: no method named 'foo' found for type 'Bar'",
        "error E0308: mismatched types",
        "error E0433: cannot find function 'println'",
        "cargo error: failed to compile",
    ];

    for query in &queries {
        let symptom = project_symptom("cargo", query);
        assert!(!symptom.sym_sha.is_empty(), "Query '{}' produced empty hash", query);
        assert_eq!(symptom.tool, "cargo");
        assert!(!symptom.normalised.is_empty());
    }
}

#[test]
fn test_kubectl_real_world_scenarios() {
    // Real-world kubectl error scenarios
    let queries = vec![
        "error: error validating YAML",
        "error: connection refused",
        "RBAC authorization error",
        "CRD not found custom resource definition",
    ];

    for query in &queries {
        let symptom = project_symptom("kubectl", query);
        assert!(!symptom.sym_sha.is_empty(), "Query '{}' produced empty hash", query);
        assert_eq!(symptom.tool, "kubectl");
        assert!(!symptom.normalised.is_empty());
    }
}

#[test]
fn test_confidence_scoring() {
    // More specific queries should have higher confidence
    let low_conf = project_symptom("npm", "error");
    let medium_conf = project_symptom("npm", "npm error cannot resolve");
    let high_conf = project_symptom("npm", "npm error ERESOLVE cannot resolve typescript module");

    // Confidence should increase with specificity
    println!("low_conf: {}", low_conf.confidence);
    println!("medium_conf: {}", medium_conf.confidence);
    println!("high_conf: {}", high_conf.confidence);

    assert!(
        medium_conf.confidence >= low_conf.confidence,
        "More keywords should have equal or higher confidence"
    );
    assert!(
        high_conf.confidence >= medium_conf.confidence,
        "Even more keywords should have equal or higher confidence"
    );
}

#[test]
fn test_raw_query_preserved() {
    // Original query should be preserved for logging
    let original = "npm ERR! ERESOLVE unable to resolve typescript";
    let symptom = project_symptom("npm", original);

    assert_eq!(symptom.raw_query, original);
}

#[test]
fn test_keywords_vector_populated() {
    // Keywords should be extracted and deduplicated
    let symptom = project_symptom("npm", "npm error resolve typescript dependency");

    assert!(!symptom.keywords.is_empty(), "Keywords should not be empty");
    // Check for specific keywords
    assert!(
        symptom.keywords.contains(&"npm".to_string()),
        "Should contain 'npm' keyword"
    );
    assert!(
        symptom.keywords.contains(&"error".to_string()),
        "Should contain 'error' keyword"
    );

    // Keywords should be sorted
    let mut sorted_keywords = symptom.keywords.clone();
    sorted_keywords.sort();
    assert_eq!(
        symptom.keywords, sorted_keywords,
        "Keywords should be sorted"
    );
}

#[test]
fn test_deterministic_across_multiple_calls() {
    // Calling project_symptom multiple times with same input should always produce same output
    let query = "npm unable to resolve typescript dependency tree";
    let mut hashes = Vec::new();

    for _ in 0..10 {
        let symptom = project_symptom("npm", query);
        hashes.push(symptom.sym_sha);
    }

    // All hashes should be identical
    for hash in &hashes[1..] {
        assert_eq!(hash, &hashes[0], "All calls should produce identical hash");
    }
}

#[test]
fn test_special_characters_handled() {
    // Queries with special characters should be tokenized properly
    let queries = vec![
        "npm ERR! code:ERESOLVE!",
        "npm (error) [ERESOLVE]",
        "npm error \"cannot resolve\"",
        "npm error: can't resolve 'module'",
    ];

    for query in queries {
        let symptom = project_symptom("npm", query);
        assert!(!symptom.sym_sha.is_empty());
        assert!(!symptom.normalised.is_empty());
    }
}

#[test]
fn test_error_code_extraction() {
    // Error codes like E0599, EACCES should be extracted
    let symptom = project_symptom("cargo", "error E0599 no method found");
    assert!(
        symptom.normalised.contains("e0599"),
        "Error code E0599 should be extracted"
    );
}