import { redirect } from 'vike/abort'

export const data = async (pageContext) => {
    try {
        // Extract URL parameters safely
        const { urlParsed } = pageContext
        const searchParams = urlParsed?.search || {}

        console.log(
            'Preview route - pageContext keys:',
            Object.keys(pageContext),
        )
        console.log('Preview route - urlParsed:', urlParsed)
        console.log('Preview route - searchParams:', searchParams)

        const {
            secret,
            path = '/',
            status = 'draft',
            documentId,
            uid,
        } = searchParams

        // Validate preview secret
        if (!secret || secret !== import.meta.env.VITE_PREVIEW_SECRET) {
            console.log(
                'Invalid secret:',
                secret,
                'Expected:',
                import.meta.env.VITE_PREVIEW_SECRET,
            )
            throw redirect('/preview-unauthorized')
        }

        // Build the preview URL path (not full URL since we're redirecting within same origin)
        const previewPath = path || '/'
        const previewUrl = new URL(previewPath, 'http://localhost')

        // Add preview parameters
        previewUrl.searchParams.set('preview', 'true')
        previewUrl.searchParams.set('status', status)

        // Optional: include document metadata for advanced preview functionality
        if (documentId) {
            previewUrl.searchParams.set('documentId', documentId)
        }
        if (uid) {
            previewUrl.searchParams.set('uid', uid)
        }

        const redirectUrl = previewUrl.pathname + previewUrl.search
        console.log('Redirecting to:', redirectUrl)

        // Use Vike's redirect
        throw redirect(redirectUrl)
    } catch (error) {
        // If it's a redirect, let it pass through
        if (error._isAbortError) {
            throw error
        }

        console.error('Preview data error:', error)

        // For debugging, let's not redirect on error, but show what went wrong
        return {
            redirectUrl: null,
            error: error.message || 'Failed to process preview request',
            pageContext: Object.keys(pageContext),
            urlParsed: pageContext.urlParsed,
        }
    }
}