using System.CommandLine;
using BlueLaminate.Cli;
using BlueLaminate.EFCore.Data;
using BlueLaminate.Scraper.Weapons;
using BlueLaminate.Scraper.Wiki;

// Entry point: System.CommandLine builds the command tree, parsing, and help.
// New features are added as additional commands here as they're implemented.
var forceOption = new Option<bool>("--force")
{
    Description = "Ignore the once-a-month throttle and sync now."
};
var dryRunOption = new Option<bool>("--dry-run")
{
    Description = "Scrape and print the weapons without writing to the database."
};

var syncWeapons = new Command(
    "sync-weapons",
    "Scrape the CS2 weapon catalogue from the wiki and upsert it (throttled to once a month).")
{
    forceOption,
    dryRunOption,
};
syncWeapons.SetAction((parseResult, ct) =>
    SyncWeaponsAsync(parseResult.GetValue(forceOption), parseResult.GetValue(dryRunOption), ct));

var root = new RootCommand("BlueLaminate CLI — Counter-Strike skin tracker tools.")
{
    syncWeapons,
};

return await root.Parse(args).InvokeAsync();

// Fetch the CS2 weapon catalogue from the wiki and upsert it. Throttled to once
// a month unless --force is passed; --dry-run scrapes and prints without a DB.
static async Task<int> SyncWeaponsAsync(bool force, bool dryRun, CancellationToken ct)
{
    var scraper = new WeaponWikiScraper(new WikiPageFetcher(CreateHttpClient()));

    if (dryRun)
    {
        var weapons = await scraper.ScrapeAsync(ct);
        Console.WriteLine($"Scraped {weapons.Count} weapons (dry run, nothing written):");
        foreach (var w in weapons)
            Console.WriteLine($"  {w.Name,-20} {w.Type,-16} {w.Team}");
        return 0;
    }

    using var db = new SkinTrackerDbContextFactory().CreateDbContext([]);
    var result = await new WeaponSyncService(db, scraper).SyncAsync(force, ct);

    if (result.Skipped)
    {
        Console.WriteLine(
            $"Skipped: weapons were last synced {result.LastRanAt:u}. "
            + "Next run allowed one month later — pass --force to override.");
    }
    else
    {
        Console.WriteLine(
            $"Synced {result.Scraped} weapons: {result.Inserted} inserted, "
            + $"{result.Updated} updated, "
            + $"{result.Scraped - result.Inserted - result.Updated} unchanged.");
    }

    return 0;
}

static HttpClient CreateHttpClient()
{
    var http = new HttpClient();
    // The wiki is fronted by Cloudflare; a browser-like User-Agent is accepted
    // on the MediaWiki API endpoint the scraper uses.
    http.DefaultRequestHeaders.UserAgent.ParseAdd(
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
        + "(KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36");
    return http;
}