/**
 * Entry Point Discovery Handler
 *
 * Resolves platform IDs for a discovered store using Dutchie GraphQL.
 * This is the step between store_discovery and product_discovery.
 *
 * Flow:
 * 1. Load dispensary info from database
 * 2. Extract slug from menu_url
 * 3. Start stealth session (fingerprint + optional proxy)
 * 4. Query Dutchie GraphQL to resolve slug → platform_dispensary_id
 * 5. Update dispensary record with resolved ID
 * 6. Queue product_discovery task if successful
 */

import { TaskContext, TaskResult } from '../task-worker';
import { startSession, endSession } from '../../platforms/dutchie';
import { resolveDispensaryIdWithDetails } from '../../platforms/dutchie/queries';

export async function handleEntryPointDiscovery(ctx: TaskContext): Promise<TaskResult> {
  const { pool, task } = ctx;
  const dispensaryId = task.dispensary_id;

  if (!dispensaryId) {
    return { success: false, error: 'No dispensary_id specified for entry_point_discovery task' };
  }

  try {
    // ============================================================
    // STEP 1: Load dispensary info
    // ============================================================
    const dispResult = await pool.query(`
      SELECT id, name, menu_url, platform_dispensary_id, menu_type, state
      FROM dispensaries
      WHERE id = $1
    `, [dispensaryId]);

    if (dispResult.rows.length === 0) {
      return { success: false, error: `Dispensary ${dispensaryId} not found` };
    }

    const dispensary = dispResult.rows[0];

    // If already has platform_dispensary_id, we're done
    if (dispensary.platform_dispensary_id) {
      console.log(`[EntryPointDiscovery] Dispensary ${dispensaryId} already has platform ID: ${dispensary.platform_dispensary_id}`);
      return {
        success: true,
        alreadyResolved: true,
        platformId: dispensary.platform_dispensary_id,
      };
    }

    const menuUrl = dispensary.menu_url;
    if (!menuUrl) {
      return { success: false, error: `Dispensary ${dispensaryId} has no menu_url` };
    }

    console.log(`[EntryPointDiscovery] Resolving platform ID for ${dispensary.name}`);
    console.log(`[EntryPointDiscovery] Menu URL: ${menuUrl}`);

    // ============================================================
    // STEP 2: Extract slug from menu URL
    // ============================================================
    let slug: string | null = null;

    const embeddedMatch = menuUrl.match(/\/embedded-menu\/([^/?]+)/);
    const dispensaryMatch = menuUrl.match(/\/dispensary\/([^/?]+)/);

    if (embeddedMatch) {
      slug = embeddedMatch[1];
    } else if (dispensaryMatch) {
      slug = dispensaryMatch[1];
    }

    if (!slug) {
      // Mark as non-dutchie menu type
      await pool.query(`
        UPDATE dispensaries
        SET menu_type = 'unknown', updated_at = NOW()
        WHERE id = $1
      `, [dispensaryId]);

      return {
        success: false,
        error: `Could not extract slug from menu_url: ${menuUrl}`,
      };
    }

    console.log(`[EntryPointDiscovery] Extracted slug: ${slug}`);

    await ctx.heartbeat();

    // ============================================================
    // STEP 3: Start stealth session
    // ============================================================
    // Per workflow-12102025.md: session identity comes from proxy location, not task params
    const session = startSession();
    console.log(`[EntryPointDiscovery] Session started: ${session.sessionId}`);

    try {
      // ============================================================
      // STEP 4: Resolve platform ID via GraphQL
      // ============================================================
      console.log(`[EntryPointDiscovery] Querying Dutchie GraphQL for slug: ${slug}`);

      const result = await resolveDispensaryIdWithDetails(slug);

      if (!result.dispensaryId) {
        // Resolution failed - could be 403, 404, or invalid response
        const reason = result.httpStatus
          ? `HTTP ${result.httpStatus}`
          : result.error || 'Unknown error';

        console.log(`[EntryPointDiscovery] Failed to resolve ${slug}: ${reason}`);

        // Mark as failed resolution but keep menu_type as dutchie
        await pool.query(`
          UPDATE dispensaries
          SET
            menu_type = CASE
              WHEN $2 = 404 THEN 'removed'
              WHEN $2 = 403 THEN 'blocked'
              ELSE 'dutchie'
            END,
            updated_at = NOW()
          WHERE id = $1
        `, [dispensaryId, result.httpStatus || 0]);

        return {
          success: false,
          error: `Could not resolve platform ID: ${reason}`,
          slug,
          httpStatus: result.httpStatus,
        };
      }

      const platformId = result.dispensaryId;
      console.log(`[EntryPointDiscovery] Resolved ${slug} -> ${platformId}`);

      await ctx.heartbeat();

      // ============================================================
      // STEP 5: Update dispensary with resolved ID
      // ============================================================
      await pool.query(`
        UPDATE dispensaries
        SET
          platform_dispensary_id = $2,
          menu_type = 'dutchie',
          crawl_enabled = true,
          updated_at = NOW()
        WHERE id = $1
      `, [dispensaryId, platformId]);

      console.log(`[EntryPointDiscovery] Updated dispensary ${dispensaryId} with platform ID`);

      // ============================================================
      // STEP 6: Queue product_discovery task
      // ============================================================
      await pool.query(`
        INSERT INTO worker_tasks (role, dispensary_id, priority, scheduled_for)
        VALUES ('product_discovery', $1, 5, NOW())
        ON CONFLICT DO NOTHING
      `, [dispensaryId]);

      console.log(`[EntryPointDiscovery] Queued product_discovery task for dispensary ${dispensaryId}`);

      return {
        success: true,
        platformId,
        slug,
        queuedProductDiscovery: true,
      };

    } finally {
      // Always end session
      endSession();
    }

  } catch (error: unknown) {
    const errorMessage = error instanceof Error ? error.message : 'Unknown error';
    console.error(`[EntryPointDiscovery] Error for dispensary ${dispensaryId}:`, errorMessage);
    return {
      success: false,
      error: errorMessage,
    };
  }
}