import { test, expect } from '@playwright/test';
import { login } from './helpers/auth';
import { epic, feature, severity, description, tag } from './helpers/allure';
import { navigateToTransactions, navigateToDiscounts, navigateToSettings } from './helpers/navigation';

test.describe('Discounts & Fees Tests', () => {
  test.setTimeout(300000);

  test('should calculate discount and verify against transactions page', async ({ page }) => {
    feature('Discounts Operations');
    tag('functional');
    severity('critical');
    description('Get latest transaction date, calculate MDR+VAT+FEE from transactions, then verify matches Discounts page totals');
    epic('Discounts & Fees');

    let latestDate = '';
    let txnTotalMDR = 0, txnTotalVAT = 0, txnTotalFee = 0, txnTotalDiscount = 0;

    // Step 1: Go to Transactions page
    await test.step('Step 1: Go to Transactions page', async () => {
      await login(page);
      await navigateToTransactions(page);
      await page.waitForTimeout(2000);
      console.log('✓ On Transactions page');
    });

    // Step 2: Find latest date with transactions
    await test.step('Step 2: Find latest date with transactions', async () => {
      await page.waitForTimeout(1000);
      
      // Scroll the table horizontally to reveal the init date column
      const tableContent = page.locator('.ant-table-content').first();
      await tableContent.evaluate((element) => {
        // Scroll to the right to reveal the init date column
        element.scrollLeft = element.scrollWidth;
      });
      await page.waitForTimeout(500);
      console.log('✓ Scrolled table horizontally to reveal init date column');
      
      // Get the first real data row (skip the hidden ant-table-measure-row)
      const firstRow = page.locator('tr.ant-table-row').first();
      const rowText = await firstRow.textContent();
      
      console.log('Full first row text after scroll:', rowText?.substring(0, 200));
      
      // Extract date from the row (format: "Mon DD, YYYY" like "Jun 19, 2026")
      const dateMatch = rowText?.match(/(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+\d{1,2},\s*\d{4}/);
      
      if (dateMatch) {
        latestDate = dateMatch[0];
        console.log('\n========== DATE EXTRACTED ==========');
        console.log('✓ Latest transaction date:', latestDate);
        console.log('====================================\n');
      } else {
        console.log('⚠ Could not extract date from first row');
        throw new Error('Failed to extract date from transaction row');
      }
    });

    // Step 3: Count how many transaction rows fall within the latest date
    await test.step('Step 3: Count transactions within the latest date', async () => {
      await page.waitForTimeout(500);

      const monthRegex = /(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+\d{1,2},\s*\d{4}/;

      let totalMatching = 0;
      let currentPage = 1;
      let keepPaging = true;

      while (keepPaging) {
        // Wait for the table body to be present before reading
        await page.locator('tr.ant-table-row').first().waitFor({ state: 'visible', timeout: 10000 });

        const rows = page.locator('tr.ant-table-row');
        const rowCount = await rows.count();

        // Capture the first row key on this page (used to detect page change later)
        const firstKey = await rows.first().getAttribute('data-row-key');
        const lastKey = await rows.nth(rowCount - 1).getAttribute('data-row-key');

        // Read the actual page footer ("Page X of Y") for verification
        const footer = await page.locator('text=/Page\\s+\\d+\\s+of\\s+\\d+/').first().textContent().catch(() => null);

        let pageMatching = 0;
        for (let i = 0; i < rowCount; i++) {
          const rowText = await rows.nth(i).textContent();
          const match = rowText?.match(monthRegex);
          const rowDate = match ? match[0] : '';
          if (rowDate === latestDate) {
            pageMatching++;
          }
        }

        totalMatching += pageMatching;
        console.log(`[${footer?.trim() || 'page ' + currentPage}] firstID=${firstKey} lastID=${lastKey} -> ${pageMatching}/${rowCount} on ${latestDate}`);

        // If not every row on this page matched, we've reached older dates - stop
        if (pageMatching < rowCount) {
          keepPaging = false;
          break;
        }

        // All rows matched - go to next page
        const nextPage = currentPage + 1;
        const nextPageBtn = page.locator(`button:has-text("${nextPage}")`).first();
        const hasNextPage = await nextPageBtn.isVisible({ timeout: 2000 }).catch(() => false);

        if (!hasNextPage) {
          keepPaging = false;
          break;
        }

        await nextPageBtn.click();

        // Wait until the first row's key actually changes (confirms the page re-rendered)
        await page.waitForFunction(
          (prevKey) => {
            const row = document.querySelector('tr.ant-table-row');
            return row && row.getAttribute('data-row-key') !== prevKey;
          },
          firstKey,
          { timeout: 10000 }
        ).catch(() => {
          console.log('⚠ Page did not change after clicking next - stopping');
        });

        currentPage = nextPage;
      }

      console.log('\n========== ROW COUNT ==========');
      console.log(`✓ Total transactions on ${latestDate}: ${totalMatching}`);
      console.log('===============================\n');
    });

    // Step 4: Enable MDR, VAT, Fee columns via Manage columns modal
    await test.step('Step 4: Enable MDR, VAT, Fee columns', async () => {
      // Open the Manage columns modal
      const manageColumnsBtn = page.locator('button:has-text("Manage columns"), button:has-text("columns")').first();
      await manageColumnsBtn.click();
      await page.waitForTimeout(1000);
      console.log('✓ Opened Manage columns modal');

      // Scope everything to the modal dialog so we don't hit the page's own search/checkboxes
      const modal = page.locator('.ant-modal-content').first();
      const searchInput = modal.locator('input[placeholder="Search"]').first();

      // Helper: search for a column and enable its checkbox if not already checked
      const enableColumn = async (term: string) => {
        await searchInput.fill('');
        await page.waitForTimeout(300);
        await searchInput.fill(term);
        await page.waitForTimeout(700);

        // After filtering, the matching column's checkbox should be the visible one
        const checkbox = modal.locator('input.ant-checkbox-input').first();
        const exists = await checkbox.isVisible({ timeout: 3000 }).catch(() => false);

        if (!exists) {
          console.log(`⚠ No checkbox found for "${term}"`);
          return;
        }

        const isChecked = await checkbox.isChecked().catch(() => false);
        if (isChecked) {
          console.log(`• "${term}" column already enabled`);
        } else {
          await checkbox.click();
          await page.waitForTimeout(400);
          console.log(`✓ Enabled "${term}" column`);
        }
      };

      await enableColumn('mdr');
      await enableColumn('vat');
      await enableColumn('fee');

      // Clear the search before closing
      await searchInput.fill('');
      await page.waitForTimeout(300);

      // Click Done to apply
      const doneBtn = modal.locator('button:has-text("Done")').first();
      await doneBtn.click();
      await page.waitForTimeout(1000);
      console.log('✓ Applied column selection (clicked Done)');
    });

    // Step 5: Sum MDR + VAT + Fee across all transactions on the latest date
    await test.step('Step 5: Sum MDR + VAT + Fee for the latest date', async () => {
      const monthRegex = /(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+\d{1,2},\s*\d{4}/;

      // Go back to page 1 (confirm the table actually re-renders)
      const beforeKey = await page.locator('tr.ant-table-row').first().getAttribute('data-row-key');
      const firstPageBtn = page.getByRole('button', { name: '1', exact: true }).first();
      if (await firstPageBtn.isVisible({ timeout: 3000 }).catch(() => false)) {
        await firstPageBtn.scrollIntoViewIfNeeded().catch(() => {});
        await firstPageBtn.click();
        await page.waitForFunction(
          (prevKey) => {
            const r = document.querySelector('tr.ant-table-row');
            return r && r.getAttribute('data-row-key') !== prevKey;
          },
          beforeKey,
          { timeout: 10000 }
        ).catch(() => console.log('⚠ Did not return to page 1 cleanly'));
        await page.waitForTimeout(500);
      }
      console.log(`Back on page 1, first row ID: ${await page.locator('tr.ant-table-row').first().getAttribute('data-row-key')}`);

      // Determine column indexes for MDR, VAT, Fee from the table header
      const headerCells = page.locator('thead th');
      const headerCount = await headerCells.count();
      let mdrIdx = -1, vatIdx = -1, feeIdx = -1;
      for (let i = 0; i < headerCount; i++) {
        const t = (await headerCells.nth(i).textContent())?.trim();
        if (t === 'MDR') mdrIdx = i;
        else if (t === 'VAT') vatIdx = i;
        else if (t === 'Fee') feeIdx = i;
      }
      console.log(`Column indexes -> MDR:${mdrIdx} VAT:${vatIdx} Fee:${feeIdx}`);
      if (mdrIdx < 0 || vatIdx < 0 || feeIdx < 0) {
        throw new Error('Could not locate MDR/VAT/Fee columns in header');
      }

      // Read a numeric value from a cell: the value sits in the last <article>,
      // separate from the currency-icon SVG article.
      const parseCell = async (cell: ReturnType<typeof page.locator>): Promise<number> => {
        const valArticle = cell.locator('article').last();
        const txt = (await valArticle.textContent().catch(() => '')) || '';
        const num = parseFloat(txt.replace(/[^0-9.\-]/g, ''));
        return isNaN(num) ? 0 : num;
      };

      let totalMDR = 0, totalVAT = 0, totalFee = 0, totalRows = 0;
      let currentPage = 1;
      let keepPaging = true;

      while (keepPaging) {
        await page.locator('tr.ant-table-row').first().waitFor({ state: 'visible', timeout: 10000 });
        const rows = page.locator('tr.ant-table-row');
        const rowCount = await rows.count();
        const firstKey = await rows.first().getAttribute('data-row-key');

        let pageMatching = 0;
        for (let i = 0; i < rowCount; i++) {
          const row = rows.nth(i);
          const rowText = await row.textContent();
          const m = rowText?.match(monthRegex);
          const rowDate = m ? m[0] : '';
          if (rowDate !== latestDate) continue;

          const cells = row.locator('td');
          const mdr = await parseCell(cells.nth(mdrIdx));
          const vat = await parseCell(cells.nth(vatIdx));
          const fee = await parseCell(cells.nth(feeIdx));
          const rowDiscount = mdr + vat + fee;

          totalMDR += mdr;
          totalVAT += vat;
          totalFee += fee;
          totalRows++;
          pageMatching++;

          const id = await row.getAttribute('data-row-key');
          console.log(`  Row ${id}: MDR=${mdr.toFixed(2)} VAT=${vat.toFixed(2)} Fee=${fee.toFixed(2)} -> ${rowDiscount.toFixed(2)}`);
        }

        console.log(`[page ${currentPage}] matched ${pageMatching}/${rowCount} rows`);

        // If not every row matched, we've reached older dates - stop
        if (pageMatching < rowCount) {
          keepPaging = false;
          break;
        }

        // Go to next page
        const nextPage = currentPage + 1;
        const nextPageBtn = page.getByRole('button', { name: `${nextPage}`, exact: true }).first();
        const hasNextPage = await nextPageBtn.isVisible({ timeout: 2000 }).catch(() => false);
        if (!hasNextPage) {
          keepPaging = false;
          break;
        }

        await nextPageBtn.click();
        await page.waitForFunction(
          (prevKey) => {
            const row = document.querySelector('tr.ant-table-row');
            return row && row.getAttribute('data-row-key') !== prevKey;
          },
          firstKey,
          { timeout: 10000 }
        ).catch(() => {
          console.log('⚠ Page did not change after clicking next - stopping');
        });
        currentPage = nextPage;
      }

      const grandTotal = totalMDR + totalVAT + totalFee;
      txnTotalMDR = totalMDR;
      txnTotalVAT = totalVAT;
      txnTotalFee = totalFee;
      txnTotalDiscount = grandTotal;
      console.log('\n========== DISCOUNT TOTALS (Transactions page) ==========');
      console.log(`Date: ${latestDate}`);
      console.log(`Rows summed: ${totalRows}`);
      console.log(`Total MDR: ${totalMDR.toFixed(2)}`);
      console.log(`Total VAT: ${totalVAT.toFixed(2)}`);
      console.log(`Total Fee: ${totalFee.toFixed(2)}`);
      console.log(`Total Discount (MDR+VAT+Fee): ${grandTotal.toFixed(2)}`);
      console.log('=========================================================\n');
    });

    // Step 6: Go to Discounts page and filter by the transaction date
    await test.step('Step 6: Go to Discounts page and filter by date', async () => {
      await navigateToDiscounts(page);
      await page.waitForTimeout(2000);
      console.log('✓ On Discounts & Fees page');

      // Convert latestDate ("Jun 19, 2026") to picker title format ("2026-06-19")
      const months: Record<string, string> = {
        Jan: '01', Feb: '02', Mar: '03', Apr: '04', May: '05', Jun: '06',
        Jul: '07', Aug: '08', Sep: '09', Oct: '10', Nov: '11', Dec: '12',
      };
      const parts = latestDate.match(/(\w+)\s+(\d{1,2}),\s*(\d{4})/);
      if (!parts) {
        throw new Error(`Could not parse latestDate: ${latestDate}`);
      }
      const titleDate = `${parts[3]}-${months[parts[1]]}-${parts[2].padStart(2, '0')}`;
      console.log(`Target date cell title: ${titleDate}`);

      // Open the date range picker by clicking the start date input
      const startInput = page.locator('input[placeholder="Start date"]').first();
      await startInput.click();
      await page.waitForTimeout(1000);
      console.log('✓ Opened date range picker');

      // The calendar opens on the current month - page back until the
      // target month is in view (this dataset's dates can be well over a
      // year old, so the calendar needs more than a couple of clicks back).
      const dayCell = page.locator(`td[title="${titleDate}"]`).first();
      const prevBtn = page.locator('.ant-picker-header-prev-btn').first();
      let dayCellFound = false;
      for (let attempt = 0; attempt < 60; attempt++) {
        dayCellFound = await dayCell.isVisible().catch(() => false);
        if (dayCellFound) break;
        await prevBtn.click();
        await page.waitForTimeout(300);
      }
      expect(dayCellFound, `Target date ${titleDate} should become available in the calendar`).toBe(true);

      // Click the target day cell for the start of the range
      await dayCell.click();
      await page.waitForTimeout(500);
      console.log('✓ Selected start date');

      // Click the same day cell again for the end of the range (single-day filter)
      const dayCellEnd = page.locator(`td[title="${titleDate}"]`).first();
      await dayCellEnd.click();
      await page.waitForTimeout(1500);
      console.log('✓ Selected end date (same day)');

      // Verify the filter actually took: read back the start/end input values
      const startVal = await page.locator('input[date-range="start"], input[placeholder="Start date"]').first().inputValue().catch(() => '');
      const endVal = await page.locator('input[date-range="end"], input[placeholder="End date"]').first().inputValue().catch(() => '');
      console.log(`Start input value: "${startVal}"`);
      console.log(`End input value: "${endVal}"`);

      const pickerOpen = await page.locator('.ant-picker-dropdown:visible').count().catch(() => 0);
      console.log(`Picker dropdown still open: ${pickerOpen > 0 ? 'yes' : 'no'}`);

      if (startVal === titleDate && endVal === titleDate) {
        console.log(`✓ Date range correctly applied: ${titleDate} to ${titleDate}`);
      } else {
        console.log(`⚠ Date range may not have applied correctly (expected ${titleDate} for both)`);
      }

      console.log(`✓ Filtered Discounts page to ${latestDate}`);
    });

    // Step 7: Read the Discounts-page total and cross-check against Transactions
    await test.step('Step 7: Cross-check total discount', async () => {
      await page.waitForTimeout(1500);

      const parseNum = (s: string | null | undefined): number => {
        const n = parseFloat((s || '').replace(/[^0-9.\-]/g, ''));
        return isNaN(n) ? 0 : n;
      };

      // Top "Total Discount" card (large number) - this is the source of truth
      const totalDiscountCard = page.locator('article.text-4xl').first();
      const cardText = await totalDiscountCard.textContent().catch(() => '');
      const discountPageTotal = parseNum(cardText);

      // Scheme Discount Breakdown table (scoped via its heading) for internal detail
      const schemeTable = page.locator('xpath=//*[contains(text(),"Scheme Discount Breakdown")]/following::table[1]').first();
      let breakdownMDR = 0, breakdownVAT = 0, breakdownFee = 0, breakdownRed = 0;

      if (await schemeTable.isVisible({ timeout: 3000 }).catch(() => false)) {
        // Map header columns to indexes
        const headers = schemeTable.locator('thead th');
        const headerCount = await headers.count();
        let mdrIdx = -1, vatIdx = -1, feeIdx = -1, dfIdx = -1;
        for (let i = 0; i < headerCount; i++) {
          const t = (await headers.nth(i).textContent())?.trim().toLowerCase();
          if (t === 'mdr') mdrIdx = i;
          else if (t === 'vat') vatIdx = i;
          else if (t?.includes('processing') || t === 'fee') feeIdx = i;
          else if (t?.includes('discounts')) dfIdx = i;
        }

        // Sum across all card-scheme rows. Each amount cell renders a
        // currency-icon SVG (with an embedded <style>.cls-1{fill:#231f20}...)
        // in one <article> and the actual number in a later <article> - reading
        // the whole <td>'s text (like the naive version below did) drags the
        // icon's hex-color digits into the string and corrupts the parsed
        // number. Scope to the last <article>, same fix already used for the
        // Transactions-page MDR/VAT/Fee columns above.
        const readCellNum = async (row: ReturnType<typeof schemeTable.locator>, idx: number): Promise<number> => {
          if (idx < 0) return 0;
          const cell = row.locator('td').nth(idx);
          const valArticle = cell.locator('article').last();
          const txt = (await valArticle.textContent().catch(() => '')) || (await cell.textContent().catch(() => '')) || '';
          return parseNum(txt);
        };

        const rows = schemeTable.locator('tbody tr:not([aria-hidden="true"])');
        const rowCount = await rows.count();
        for (let r = 0; r < rowCount; r++) {
          const row = rows.nth(r);
          breakdownMDR += await readCellNum(row, mdrIdx);
          breakdownVAT += await readCellNum(row, vatIdx);
          breakdownFee += await readCellNum(row, feeIdx);
          breakdownRed += await readCellNum(row, dfIdx);
        }
      }

      const breakdownSum = breakdownMDR + breakdownVAT + breakdownFee;

      console.log('\n========== CROSS-CHECK ==========');
      console.log(`Date: ${latestDate}`);
      console.log(`Transactions page sum (rounded per-row MDR+VAT+Fee): ${txnTotalDiscount.toFixed(2)}`);
      console.log(`  - MDR: ${txnTotalMDR.toFixed(2)}, VAT: ${txnTotalVAT.toFixed(2)}, Fee: ${txnTotalFee.toFixed(2)}`);
      console.log(`Discounts page Total Discount card: ${discountPageTotal.toFixed(2)}`);
      console.log(`Discounts page breakdown -> MDR: ${breakdownMDR.toFixed(2)}, VAT: ${breakdownVAT.toFixed(2)}, Fee: ${breakdownFee.toFixed(2)} (sum ${breakdownSum.toFixed(2)})`);
      console.log(`Discounts page breakdown "Discounts & fees" column: ${breakdownRed.toFixed(2)}`);

      const info = test.info();

      // NOTE: the "Total Discount" card is scoped to the selected date range,
      // but the Scheme/Terminal Discount Breakdown tables show all-time
      // cumulative totals regardless of the date filter (confirmed against
      // the live Terminal Discount Breakdown, which shows values far larger
      // than any single day could produce). So card vs breakdown-sum is NOT
      // expected to match - this is informational only, not an assertion.
      const internalDiff = Math.abs(discountPageTotal - breakdownSum);
      if (internalDiff < 0.01) {
        console.log(`Discounts page card and breakdown happen to match (${discountPageTotal.toFixed(2)}) - breakdown is all-time, card is date-filtered`);
      } else {
        console.log(`Discounts page card (date-filtered: ${discountPageTotal.toFixed(2)}) vs breakdown (all-time: ${breakdownSum.toFixed(2)}) - expected to differ, not a bug`);
      }

      // Cross-check Transactions sum vs Discounts total
      const diff = Math.abs(txnTotalDiscount - discountPageTotal);
      const summary =
        `Date: ${latestDate}\n` +
        `Transactions page sum (rounded per-row): ${txnTotalDiscount.toFixed(2)}\n` +
        `Discounts page total: ${discountPageTotal.toFixed(2)}\n` +
        `Difference: ${diff.toFixed(2)}`;

      await info.attach('discount-cross-check', { body: summary, contentType: 'text/plain' });

      if (diff < 0.01) {
        console.log(`✓ MATCH: totals are equal (${discountPageTotal.toFixed(2)})`);
      } else {
        const msg = `Calculation mismatch on ${latestDate}: Transactions page sum = ${txnTotalDiscount.toFixed(2)}, Discounts page total = ${discountPageTotal.toFixed(2)} (difference ${diff.toFixed(2)})`;
        console.log(`⚠ ${msg}`);
        info.annotations.push({ type: 'mismatch', description: msg });
        // Surface as a soft failure so the Playwright report flags it without aborting
        expect.soft(txnTotalDiscount, msg).toBeCloseTo(discountPageTotal, 2);
      }
      console.log('=================================\n');
    });

    // Step 8: Read configured discount rates from Settings (source of truth)
    await test.step('Step 8: Read discount rates from Settings', async () => {
      await navigateToSettings(page);
      await page.waitForTimeout(2000);
      console.log('✓ On Settings page');

      // Click the "Discount rates" tab
      const discountRatesTab = page.getByText('Discount rates', { exact: true }).first();
      await discountRatesTab.click();
      await page.waitForTimeout(1500);
      console.log('✓ Opened Discount rates');

      const parseNum = (s: string | null | undefined): number => {
        const n = parseFloat((s || '').replace(/[^0-9.\-]/g, ''));
        return isNaN(n) ? 0 : n;
      };

      // Scope to the Discount Rate Configuration table
      const ratesTable = page.locator('xpath=//*[contains(text(),"Discount Rate Configuration")]/following::table[1]').first();
      await ratesTable.waitFor({ state: 'visible', timeout: 10000 });

      // Map header columns to indexes
      const headers = ratesTable.locator('thead th');
      const headerCount = await headers.count();
      let cardIdx = -1, mdrIdx = -1, vatIdx = -1, capIdx = -1, feeIdx = -1;
      for (let i = 0; i < headerCount; i++) {
        const t = (await headers.nth(i).textContent())?.trim().toLowerCase();
        if (t === 'card') cardIdx = i;
        else if (t === 'mdr') mdrIdx = i;
        else if (t === 'vat') vatIdx = i;
        else if (t?.includes('cap')) capIdx = i;
        else if (t?.includes('processing') || t === 'fee') feeIdx = i;
      }
      console.log(`Rate columns -> card:${cardIdx} mdr:${mdrIdx} vat:${vatIdx} cap:${capIdx} fee:${feeIdx}`);

      const rateMap: Record<string, { mdr: number; vat: number; cap: number; fee: number }> = {};

      const rows = ratesTable.locator('tbody tr');
      const rowCount = await rows.count();
      for (let r = 0; r < rowCount; r++) {
        const cellTexts = await rows.nth(r).locator('td').allTextContents();
        const cardText = cellTexts[cardIdx] || '';
        // Extract the English card-scheme name after the "/"
        const nameMatch = cardText.match(/\/\s*([A-Za-z]+)/);
        const cardName = (nameMatch ? nameMatch[1] : cardText.trim()).toLowerCase();

        const mdr = parseNum(cellTexts[mdrIdx]);
        const vat = parseNum(cellTexts[vatIdx]);
        const cap = capIdx >= 0 ? parseNum(cellTexts[capIdx]) : 0;
        const fee = feeIdx >= 0 ? parseNum(cellTexts[feeIdx]) : 0;

        rateMap[cardName] = { mdr, vat, cap, fee };
        console.log(`  ${cardName}: MDR ${mdr}% | VAT ${vat}% | Cap ${cap} | Fee ${fee}%`);
      }

      console.log('\n========== DISCOUNT RATES (Settings) ==========');
      console.log(JSON.stringify(rateMap, null, 2));
      console.log('===============================================\n');
    });
  });
});