// Link Validation Script
const validateWebsite = {
    // Core paths that must exist
    criticalPaths: [
        '/',
        '/projects',
        '/papers',
        '/proposals',
        '/docs',
        '/api',
        '/investors'
    ],

    // Project paths
    projectPaths: [
        '/projects/analytics',
        '/projects/autoglaucoma',
        '/projects/automedical'
    ],

    // Paper paths
    paperPaths: [
        '/papers/fermed-vlm.pdf',
        '/papers/fermed-vlm.html',
        '/papers/archive'
    ],

    // Proposal paths
    proposalPaths: [
        '/proposals/nhs/main',
        '/proposals/nhs/detailed',
        '/proposals/nhs/formal',
        '/proposals/spanish/12oct',
        '/proposals/spanish/hospital',
        '/proposals/simple'
    ],

    // Documentation paths
    docPaths: [
        '/docs/main',
        '/docs/internal/emails',
        '/docs/internal/requirements',
        '/docs/internal/context',
        '/docs/references'
    ],

    // Validate all links
    validateLinks() {
        const results = {
            working: [],
            redirects: [],
            broken: []
        };

        // Combine all paths
        const allPaths = [
            ...this.criticalPaths,
            ...this.projectPaths,
            ...this.paperPaths,
            ...this.proposalPaths,
            ...this.docPaths
        ];

        // Check each path
        allPaths.forEach(path => {
            try {
                const response = fetch(path);
                if (response.ok) {
                    results.working.push(path);
                } else if (response.status >= 300 && response.status < 400) {
                    results.redirects.push(path);
                } else {
                    results.broken.push(path);
                }
            } catch (error) {
                results.broken.push(path);
            }
        });

        return results;
    },

    // Validate navigation consistency
    validateNavigation() {
        const navResults = {
            consistent: [],
            inconsistent: []
        };

        // Check navigation elements
        document.querySelectorAll('nav a').forEach(link => {
            const href = link.getAttribute('href');
            if (href) {
                const matchingPath = this.allPaths.find(path => path === href);
                if (matchingPath) {
                    navResults.consistent.push(href);
                } else {
                    navResults.inconsistent.push(href);
                }
            }
        });

        return navResults;
    },

    // Validate breadcrumbs
    validateBreadcrumbs() {
        const breadcrumbResults = {
            valid: [],
            invalid: []
        };

        document.querySelectorAll('.breadcrumb').forEach(breadcrumb => {
            const links = breadcrumb.querySelectorAll('a');
            let validPath = true;
            let currentPath = '';

            links.forEach(link => {
                const href = link.getAttribute('href');
                if (href) {
                    currentPath += href === '/' ? '' : href;
                    if (!this.allPaths.includes(currentPath)) {
                        validPath = false;
                    }
                }
            });

            if (validPath) {
                breadcrumbResults.valid.push(currentPath);
            } else {
                breadcrumbResults.invalid.push(currentPath);
            }
        });

        return breadcrumbResults;
    },

    // Generate report
    generateReport() {
        const linkResults = this.validateLinks();
        const navResults = this.validateNavigation();
        const breadcrumbResults = this.validateBreadcrumbs();

        return {
            links: linkResults,
            navigation: navResults,
            breadcrumbs: breadcrumbResults,
            summary: {
                totalLinks: Object.values(linkResults).flat().length,
                brokenLinks: linkResults.broken.length,
                inconsistentNav: navResults.inconsistent.length,
                invalidBreadcrumbs: breadcrumbResults.invalid.length
            }
        };
    }
};

// Export for use in Node.js environments
if (typeof module !== 'undefined' && module.exports) {
    module.exports = validateWebsite;
}