const { LoadConfig } = require("../../lib/config")
const { GetModVersions, GetCompatibleVersion } = require("../../lib/modrinth")

const config = LoadConfig()
const { minecraft_version, modrinth_mods } = config

const Check = async () =>
{
    console.log(`\n  Checking mod compatibility for MC ${minecraft_version} (Fabric)...\n`)

    const compatible = []
    const incompatible = []
    const failed = []

    for (const slug of modrinth_mods)
    {
        try
        {
            const versions = await GetModVersions(slug)
            if (!versions)
            {
                failed.push(slug)
                continue
            }

            const match = GetCompatibleVersion(versions, minecraft_version, "fabric")
            if (match)
            {
                const filename = match.files[0]?.filename || match.version_number
                compatible.push({ slug, version: filename })
            }
            else
            {
                incompatible.push(slug)
            }
        }
        catch (err)
        {
            failed.push(slug)
        }
    }

    // Display results
    if (compatible.length)
    {
        console.log("  [OK] Compatible:")
        for (const { slug, version } of compatible)
            console.log(`       ${slug} -> ${version}`)
        console.log("")
    }

    if (incompatible.length)
    {
        console.log("  [FAIL] No compatible version:")
        for (const slug of incompatible)
            console.log(`         ${slug}`)
        console.log("")
    }

    if (failed.length)
    {
        console.log("  [WARN] Failed to check:")
        for (const slug of failed)
            console.log(`         ${slug}`)
        console.log("")
    }

    // Summary
    const total = modrinth_mods.length
    const ok = compatible.length

    console.log(`  Summary: ${ok}/${total} mods compatible\n`)

    if (incompatible.length === 0 && failed.length === 0)
        console.log("  [OK] Safe to generate!\n")
    else
        console.log("  [FAIL] Not all mods are compatible. Generate may have issues.\n")
}

module.exports = { Check }