import 'dotenv/config';
import { config, loadDynamicConfig } from '../src/config/index.js';
import { ConnectorFactory } from '../src/connectors/factory.js';
import { TradeExecutor } from '../src/services/TradeExecutor.js';
import { healthTracker } from '../src/services/healthTracker.js';
import { reconciliationExitBackfillService } from '../src/services/reconciliationExitBackfillService.js';
import { supabaseService } from '../src/services/SupabaseService.js';

type BackfillCliOptions = {
    apply: boolean;
    profileIds: Set<string>;
    ignoreAllowlist: boolean;
};

type ProfileSummary = {
    profileId: string;
    userId: string;
    attempted: boolean;
    skippedReason?: string;
    batchId?: string;
    dryRun: boolean;
    openTradeCandidates: number;
    proposedRows: number;
    insertedRows: number;
    noGoTrades: number;
};

const parseOptions = (argv: string[]): BackfillCliOptions => {
    const options: BackfillCliOptions = {
        apply: false,
        profileIds: new Set<string>(),
        ignoreAllowlist: false
    };

    for (const arg of argv) {
        if (arg === '--apply') {
            options.apply = true;
            continue;
        }
        if (arg === '--ignore-allowlist') {
            options.ignoreAllowlist = true;
            continue;
        }
        if (arg.startsWith('--profile=')) {
            const value = String(arg.slice('--profile='.length) || '').trim();
            if (value) options.profileIds.add(value);
            continue;
        }
    }

    return options;
};

const isPlaceholder = (value: string | undefined): boolean => {
    const normalized = String(value || '').trim();
    if (!normalized) return true;
    return normalized === 'your_key' || normalized === 'your_secret';
};

const normalizeProfileIds = (profileIds: Set<string>): string[] => {
    return Array.from(profileIds)
        .map((value) => String(value || '').trim())
        .filter(Boolean);
};

const run = async (): Promise<void> => {
    const options = parseOptions(process.argv.slice(2));
    await loadDynamicConfig();

    const originalDryRun = config.RECON_EXIT_BACKFILL_DRY_RUN;
    const originalAllowlist = [...config.RECON_EXIT_BACKFILL_PROFILE_ALLOWLIST];

    if (!config.ENABLE_RECON_EXIT_BACKFILL) {
        throw new Error('ENABLE_RECON_EXIT_BACKFILL=false. Enable it before running reconciliation EXIT backfill.');
    }

    config.RECON_EXIT_BACKFILL_DRY_RUN = !options.apply;

    if (options.ignoreAllowlist) {
        config.RECON_EXIT_BACKFILL_PROFILE_ALLOWLIST = [];
    } else if (options.profileIds.size > 0) {
        config.RECON_EXIT_BACKFILL_PROFILE_ALLOWLIST = normalizeProfileIds(options.profileIds);
    }

    healthTracker.recordTradingControl({
        mode: 'PAUSED',
        lastChangedBy: 'maintenance-script',
        lastChangedAt: Date.now(),
        reason: 'Offline reconciliation EXIT backfill cycle'
    });

    const [users, profiles] = await Promise.all([
        supabaseService.getActiveUsers(),
        supabaseService.getActiveProfiles()
    ]);

    const userById = new Map<string, any>();
    for (const user of users || []) {
        const userId = String((user as any)?.user_id || '').trim();
        if (!userId) continue;
        userById.set(userId, user);
    }

    const selectedProfiles = (profiles || []).filter((profile: any) => {
        const profileId = String(profile?.id || '').trim();
        if (!profileId) return false;
        if (options.profileIds.size === 0) return true;
        return options.profileIds.has(profileId);
    });

    const results: ProfileSummary[] = [];

    for (const profile of selectedProfiles) {
        const profileId = String(profile?.id || '').trim();
        const userId = String(profile?.user_id || '').trim();
        if (!profileId || !userId) continue;

        const user = userById.get(userId);
        if (!user) {
            results.push({
                profileId,
                userId,
                attempted: false,
                skippedReason: 'user_not_found',
                dryRun: config.RECON_EXIT_BACKFILL_DRY_RUN,
                openTradeCandidates: 0,
                proposedRows: 0,
                insertedRows: 0,
                noGoTrades: 0
            });
            continue;
        }

        const apiKey = config.PAPER_TRADING ? user.ALPACA_API_KEY : user.REAL_ALPACA_API_KEY;
        const apiSecret = config.PAPER_TRADING ? user.ALPACA_SECRET_KEY : user.REAL_ALPACA_SECRET_KEY;
        if (isPlaceholder(apiKey) || isPlaceholder(apiSecret)) {
            results.push({
                profileId,
                userId,
                attempted: false,
                skippedReason: 'missing_exchange_credentials',
                dryRun: config.RECON_EXIT_BACKFILL_DRY_RUN,
                openTradeCandidates: 0,
                proposedRows: 0,
                insertedRows: 0,
                noGoTrades: 0
            });
            continue;
        }

        const connector = ConnectorFactory.getCustomConnector(config.EXECUTION_PROVIDER, apiKey, apiSecret);
        const executor = new TradeExecutor(connector, undefined, userId, profileId);
        executor.setProfileSettings(profile);

        try {
            const result = await reconciliationExitBackfillService.runProfile({
                profileId,
                userId,
                executor
            });

            results.push({
                profileId,
                userId,
                attempted: result.attempted,
                skippedReason: result.skippedReason,
                batchId: result.batchId,
                dryRun: result.dryRun,
                openTradeCandidates: result.openTradeCandidates,
                proposedRows: result.proposedRows,
                insertedRows: result.insertedRows,
                noGoTrades: result.noGoTrades
            });
        } finally {
            executor.dispose();
        }
    }

    config.RECON_EXIT_BACKFILL_DRY_RUN = originalDryRun;
    config.RECON_EXIT_BACKFILL_PROFILE_ALLOWLIST = originalAllowlist;

    const aggregate = results.reduce(
        (acc, row) => {
            if (row.attempted) acc.attemptedProfiles += 1;
            if (!row.attempted && row.skippedReason) {
                acc.skippedProfiles[row.skippedReason] = (acc.skippedProfiles[row.skippedReason] || 0) + 1;
            }
            acc.proposedRows += row.proposedRows;
            acc.insertedRows += row.insertedRows;
            acc.noGoTrades += row.noGoTrades;
            return acc;
        },
        {
            attemptedProfiles: 0,
            skippedProfiles: {} as Record<string, number>,
            proposedRows: 0,
            insertedRows: 0,
            noGoTrades: 0
        }
    );

    console.log(JSON.stringify({
        mode: options.apply ? 'apply' : 'dry-run',
        profileFilter: normalizeProfileIds(options.profileIds),
        ignoreAllowlist: options.ignoreAllowlist,
        requirePause: config.RECON_EXIT_BACKFILL_REQUIRE_PAUSE,
        dryRunFlagUsed: !options.apply,
        aggregate,
        results
    }, null, 2));
};

run().catch((error) => {
    const message = error instanceof Error ? error.message : String(error);
    console.error(JSON.stringify({ error: message }, null, 2));
    process.exit(1);
});