// Sprint 66 Phase 4: CI/CD Templates Integration Tests
// RED tests following Extreme TDD methodology
//
// These tests validate the CI/CD template generation, variable substitution,
// and integration with TDG enforcement system.

#![cfg(test)]

use anyhow::Result;
use std::fs;
use std::path::{Path, PathBuf};
use tempfile::TempDir;

// ============================================================================
// Test Fixture
// ============================================================================

struct CiTemplateFixture {
    _temp_dir: TempDir,
    project_root: PathBuf,
    _templates_dir: PathBuf,
    github_template_path: PathBuf,
    gitlab_template_path: PathBuf,
    jenkins_template_path: PathBuf,
}

impl CiTemplateFixture {
    fn new() -> Result<Self> {
        let temp_dir = tempfile::tempdir()?;
        let project_root = temp_dir.path().to_path_buf();

        // Create templates directory structure
        let templates_dir = project_root.join("templates").join("ci");
        fs::create_dir_all(&templates_dir)?;

        // Copy actual templates
        let github_template_path = templates_dir.join("github-actions-tdg.yml");
        let gitlab_template_path = templates_dir.join("gitlab-ci-tdg.yml");
        let jenkins_template_path = templates_dir.join("Jenkinsfile-tdg");

        // Read actual templates from project
        let actual_templates_dir = Path::new(env!("CARGO_MANIFEST_DIR"))
            .parent()
            .unwrap()
            .join("templates")
            .join("ci");

        if actual_templates_dir.exists() {
            fs::copy(
                actual_templates_dir.join("github-actions-tdg.yml"),
                &github_template_path,
            )?;
            fs::copy(
                actual_templates_dir.join("gitlab-ci-tdg.yml"),
                &gitlab_template_path,
            )?;
            fs::copy(
                actual_templates_dir.join("Jenkinsfile-tdg"),
                &jenkins_template_path,
            )?;
        }

        Ok(Self {
            _temp_dir: temp_dir,
            project_root,
            _templates_dir: templates_dir,
            github_template_path,
            gitlab_template_path,
            jenkins_template_path,
        })
    }

    fn read_template(&self, template_path: &Path) -> Result<String> {
        Ok(fs::read_to_string(template_path)?)
    }

    fn substitute_variables(&self, template: &str) -> String {
        template
            .replace("{{PMAT_VERSION}}", "2.180.0")
            .replace("{{BASELINE_PATH}}", ".pmat/tdg-baseline.json")
            .replace("{{MIN_GRADE}}", "B+")
            .replace("{{MAX_SCORE_DROP}}", "5.0")
            .replace("{{MODE}}", "strict")
            .replace("{{BLOCK_ON_REGRESSION}}", "true")
            .replace("{{BLOCK_ON_NEW_FILES}}", "true")
            .replace("{{AUTO_UPDATE}}", "true")
            .replace("{{STORE_IN_GIT}}", "true")
    }
}

// ============================================================================
// GitHub Actions Template Tests
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_exists() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    // Verify template file exists
    assert!(
        fixture.github_template_path.exists(),
        "GitHub Actions template should exist at templates/ci/github-actions-tdg.yml"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_has_required_jobs() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.github_template_path)?;

    // Required jobs
    assert!(
        template.contains("tdg-quality-check"),
        "GitHub Actions template must have tdg-quality-check job"
    );

    // Required steps
    assert!(
        template.contains("Checkout code"),
        "Template must have checkout step"
    );
    assert!(
        template.contains("Install PMAT"),
        "Template must have PMAT installation step"
    );
    assert!(
        template.contains("Run regression check"),
        "Template must have regression check step"
    );
    assert!(
        template.contains("Check new file quality"),
        "Template must have quality check step"
    );
    assert!(
        template.contains("Generate TDG report"),
        "Template must have report generation step"
    );
    assert!(
        template.contains("Update baseline on main branch"),
        "Template must have baseline update step"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_variable_substitution() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.github_template_path)?;

    // Verify template has placeholder variables
    assert!(
        template.contains("{{PMAT_VERSION}}"),
        "Template must have PMAT_VERSION placeholder"
    );
    assert!(
        template.contains("{{BASELINE_PATH}}"),
        "Template must have BASELINE_PATH placeholder"
    );
    assert!(
        template.contains("{{MIN_GRADE}}"),
        "Template must have MIN_GRADE placeholder"
    );
    assert!(
        template.contains("{{MAX_SCORE_DROP}}"),
        "Template must have MAX_SCORE_DROP placeholder"
    );
    assert!(
        template.contains("{{MODE}}"),
        "Template must have MODE placeholder"
    );

    // Substitute variables
    let substituted = fixture.substitute_variables(&template);

    // Verify substitution worked
    assert!(
        substituted.contains("PMAT_VERSION: \"2.180.0\""),
        "PMAT_VERSION should be substituted"
    );
    assert!(
        substituted.contains(".pmat/tdg-baseline.json"),
        "BASELINE_PATH should be substituted"
    );
    assert!(
        substituted.contains("MIN_GRADE: \"B+\""),
        "MIN_GRADE should be substituted"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_pr_comment_integration() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.github_template_path)?;

    // Verify PR comment step exists
    assert!(
        template.contains("Comment PR with TDG results"),
        "Template must have PR comment step"
    );
    assert!(
        template.contains("actions/github-script@v7"),
        "Template must use github-script action for PR comments"
    );
    assert!(
        template.contains("github.rest.issues.createComment"),
        "Template must create PR comment via GitHub API"
    );

    Ok(())
}

// ============================================================================
// GitLab CI Template Tests
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_gitlab_ci_template_exists() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    // Verify template file exists
    assert!(
        fixture.gitlab_template_path.exists(),
        "GitLab CI template should exist at templates/ci/gitlab-ci-tdg.yml"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_gitlab_ci_template_has_required_stages() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.gitlab_template_path)?;

    // Verify stages
    assert!(
        template.contains("stages:"),
        "GitLab CI template must define stages"
    );
    assert!(
        template.contains("- install"),
        "Template must have install stage"
    );
    assert!(
        template.contains("- analyze"),
        "Template must have analyze stage"
    );
    assert!(
        template.contains("- report"),
        "Template must have report stage"
    );
    assert!(
        template.contains("- update"),
        "Template must have update stage"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_gitlab_ci_template_has_required_jobs() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.gitlab_template_path)?;

    // Required jobs
    assert!(
        template.contains("install_pmat:"),
        "Template must have install_pmat job"
    );
    assert!(
        template.contains("baseline_check:"),
        "Template must have baseline_check job"
    );
    assert!(
        template.contains("tdg_regression_check:"),
        "Template must have tdg_regression_check job"
    );
    assert!(
        template.contains("tdg_quality_check:"),
        "Template must have tdg_quality_check job"
    );
    assert!(
        template.contains("tdg_report:"),
        "Template must have tdg_report job"
    );
    assert!(
        template.contains("tdg_baseline_update:"),
        "Template must have tdg_baseline_update job"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_gitlab_ci_template_caching() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.gitlab_template_path)?;

    // Verify caching configuration
    assert!(
        template.contains("cache:"),
        "GitLab CI template must configure caching"
    );
    assert!(
        template.contains(".cargo/"),
        "Template must cache cargo dependencies"
    );
    assert!(
        template.contains("artifacts:"),
        "Template must define artifacts"
    );

    Ok(())
}

// ============================================================================
// Jenkins Pipeline Template Tests
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_jenkins_template_exists() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    // Verify template file exists
    assert!(
        fixture.jenkins_template_path.exists(),
        "Jenkins template should exist at templates/ci/Jenkinsfile-tdg"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_jenkins_template_has_required_stages() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify pipeline structure
    assert!(
        template.contains("pipeline {"),
        "Jenkins template must be a declarative pipeline"
    );
    assert!(template.contains("stages {"), "Template must define stages");

    // Required stages
    assert!(
        template.contains("stage('Setup')"),
        "Template must have Setup stage"
    );
    assert!(
        template.contains("stage('Install PMAT')"),
        "Template must have Install PMAT stage"
    );
    assert!(
        template.contains("stage('Baseline Check')"),
        "Template must have Baseline Check stage"
    );
    assert!(
        template.contains("stage('Quality Analysis')"),
        "Template must have Quality Analysis stage"
    );
    assert!(
        template.contains("stage('Generate Report')"),
        "Template must have Generate Report stage"
    );
    assert!(
        template.contains("stage('Update Baseline')"),
        "Template must have Update Baseline stage"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_jenkins_template_parallel_execution() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify parallel execution for quality checks
    assert!(
        template.contains("parallel {"),
        "Jenkins template must use parallel execution for quality checks"
    );
    assert!(
        template.contains("stage('Regression Check')"),
        "Template must have parallel Regression Check stage"
    );
    assert!(
        template.contains("stage('Quality Check')"),
        "Template must have parallel Quality Check stage"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_jenkins_template_post_actions() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify post-build actions
    assert!(template.contains("post {"), "Template must have post block");
    assert!(
        template.contains("always {"),
        "Template must have always post action"
    );
    assert!(
        template.contains("success {"),
        "Template must have success post action"
    );
    assert!(
        template.contains("failure {"),
        "Template must have failure post action"
    );

    Ok(())
}

// ============================================================================
// Cross-Platform Template Tests
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_all_templates_use_consistent_pmat_commands() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    let github_template = fixture.read_template(&fixture.github_template_path)?;
    let gitlab_template = fixture.read_template(&fixture.gitlab_template_path)?;
    let jenkins_template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify consistent PMAT command usage across all templates
    let required_commands = vec![
        "pmat tdg baseline create",
        "pmat tdg baseline update",
        "pmat tdg check-regression",
        "pmat tdg check-quality",
        "pmat tdg --path",
    ];

    for cmd in required_commands {
        assert!(
            github_template.contains(cmd),
            "GitHub Actions template must use command: {}",
            cmd
        );
        assert!(
            gitlab_template.contains(cmd),
            "GitLab CI template must use command: {}",
            cmd
        );
        assert!(
            jenkins_template.contains(cmd),
            "Jenkins template must use command: {}",
            cmd
        );
    }

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_all_templates_have_baseline_auto_update() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    let github_template = fixture.read_template(&fixture.github_template_path)?;
    let gitlab_template = fixture.read_template(&fixture.gitlab_template_path)?;
    let jenkins_template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify baseline auto-update on main branch
    assert!(
        github_template.contains("Update baseline on main branch"),
        "GitHub Actions template must have baseline auto-update"
    );
    assert!(
        gitlab_template.contains("tdg_baseline_update:"),
        "GitLab CI template must have baseline auto-update job"
    );
    assert!(
        jenkins_template.contains("stage('Update Baseline')"),
        "Jenkins template must have baseline auto-update stage"
    );

    // Verify git commit and push
    assert!(
        github_template.contains("git commit"),
        "GitHub Actions template must commit baseline updates"
    );
    assert!(
        gitlab_template.contains("git commit"),
        "GitLab CI template must commit baseline updates"
    );
    assert!(
        jenkins_template.contains("git commit"),
        "Jenkins template must commit baseline updates"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_all_templates_generate_reports() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    let github_template = fixture.read_template(&fixture.github_template_path)?;
    let gitlab_template = fixture.read_template(&fixture.gitlab_template_path)?;
    let jenkins_template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify report generation
    let report_formats = vec!["--format json", "--format markdown"];

    for format in report_formats {
        assert!(
            github_template.contains(format),
            "GitHub Actions template must generate report in format: {}",
            format
        );
        assert!(
            gitlab_template.contains(format),
            "GitLab CI template must generate report in format: {}",
            format
        );
        assert!(
            jenkins_template.contains(format),
            "Jenkins template must generate report in format: {}",
            format
        );
    }

    Ok(())
}

// ============================================================================
// Integration Tests (End-to-End)
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_can_be_substituted_and_deployed() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.github_template_path)?;

    // Substitute all variables
    let substituted = fixture.substitute_variables(&template);

    // Verify no placeholder variables remain
    assert!(
        !substituted.contains("{{"),
        "Substituted template should not contain placeholder variables"
    );
    assert!(
        !substituted.contains("}}"),
        "Substituted template should not contain placeholder variables"
    );

    // Write to .github/workflows directory
    let workflows_dir = fixture.project_root.join(".github").join("workflows");
    fs::create_dir_all(&workflows_dir)?;
    let workflow_path = workflows_dir.join("tdg-quality.yml");
    fs::write(&workflow_path, substituted)?;

    // Verify file was created
    assert!(
        workflow_path.exists(),
        "GitHub Actions workflow should be deployed to .github/workflows/"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_gitlab_ci_template_can_be_substituted_and_deployed() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.gitlab_template_path)?;

    // Substitute all variables
    let substituted = fixture.substitute_variables(&template);

    // Verify no placeholder variables remain
    assert!(
        !substituted.contains("{{"),
        "Substituted template should not contain placeholder variables"
    );

    // Write to project root as .gitlab-ci.yml
    let ci_config_path = fixture.project_root.join(".gitlab-ci.yml");
    fs::write(&ci_config_path, substituted)?;

    // Verify file was created
    assert!(
        ci_config_path.exists(),
        "GitLab CI config should be deployed to project root"
    );

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_jenkins_template_can_be_substituted_and_deployed() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Substitute all variables
    let substituted = fixture.substitute_variables(&template);

    // Verify no placeholder variables remain
    assert!(
        !substituted.contains("{{"),
        "Substituted template should not contain placeholder variables"
    );

    // Write to project root as Jenkinsfile
    let jenkinsfile_path = fixture.project_root.join("Jenkinsfile");
    fs::write(&jenkinsfile_path, substituted)?;

    // Verify file was created
    assert!(
        jenkinsfile_path.exists(),
        "Jenkinsfile should be deployed to project root"
    );

    Ok(())
}

// ============================================================================
// Template Validation Tests
// ============================================================================

#[test]
#[ignore] // RED test - Phase 4
fn test_github_actions_template_yaml_syntax() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;
    let template = fixture.read_template(&fixture.github_template_path)?;
    let substituted = fixture.substitute_variables(&template);

    // Basic YAML syntax validation
    // This is a simple check - full validation would require a YAML parser
    assert!(
        !substituted.contains("\t"),
        "YAML template should not contain tabs (use spaces)"
    );

    // Check for proper indentation patterns
    let lines: Vec<&str> = substituted.lines().collect();
    for (i, line) in lines.iter().enumerate() {
        if line.contains(":") && !line.trim().starts_with('#') {
            let spaces = line.len() - line.trim_start().len();
            assert!(
                spaces % 2 == 0,
                "Line {} should have even indentation (2-space indents): {}",
                i + 1,
                line
            );
        }
    }

    Ok(())
}

#[test]
#[ignore] // RED test - Phase 4
fn test_all_templates_have_documentation_headers() -> Result<()> {
    let fixture = CiTemplateFixture::new()?;

    let github_template = fixture.read_template(&fixture.github_template_path)?;
    let gitlab_template = fixture.read_template(&fixture.gitlab_template_path)?;
    let jenkins_template = fixture.read_template(&fixture.jenkins_template_path)?;

    // Verify documentation headers
    let templates = vec![
        ("GitHub Actions", github_template),
        ("GitLab CI", gitlab_template),
        ("Jenkins", jenkins_template),
    ];

    for (name, template) in templates {
        assert!(
            template.contains("PMAT TDG Quality Enforcement"),
            "{} template must have documentation header",
            name
        );
        assert!(
            template.contains("Auto-generated by"),
            "{} template must indicate it's auto-generated",
            name
        );
        assert!(
            template.contains("DO NOT EDIT MANUALLY"),
            "{} template must warn against manual editing",
            name
        );
        assert!(
            template.contains("Configuration: .pmat/tdg-rules.toml"),
            "{} template must reference configuration file",
            name
        );
    }

    Ok(())
}
