#!/usr/bin/env node
// ==========================================================================
// CARD API UAT Test Script
// ==========================================================================
// Exercises every CARD REST API use case the STEAM Dashboard will run in
// production. Run this against the UAT instance to verify the service
// account has been onboarded and all endpoints are accessible.
//
// Usage:
//   cd backend
//   node scripts/card-uat-test.js                     # auto-discovers NTS-AEO-STEAM
//   node scripts/card-uat-test.js NTS-ACCESS-ENG      # target a specific team
//
// Prerequisites:
//   - backend/.env has CARD_API_URL pointing to UAT
//     (https://card.caas.stage.charterlab.com)
//   - CARD_API_USER / CARD_API_PASS set to service account credentials
//   - CARD_SKIP_TLS=true if behind Charter's SSL inspection proxy
//   - Service account has been onboarded with the CARD team
//
// The script logs every API call, response status, and timing to both
// console and a log file at backend/scripts/card-uat-test.log.
// ==========================================================================

require('dotenv').config({ path: require('path').join(__dirname, '..', '.env') });

const fs   = require('fs');
const path = require('path');
const cardApi = require('../helpers/cardApi');

const LOG_FILE = path.join(__dirname, 'card-uat-test.log');
const results  = [];

// CLI: optional team name override (e.g. node scripts/card-uat-test.js NTS-ACCESS-ENG)
const CLI_TEAM = process.argv[2] || null;

// State carried between tests
let discoveredTeam = null;
let discoveredAssetId = null;
let discoveredUpdateToken = null;

// ---------------------------------------------------------------------------
// Logging
// ---------------------------------------------------------------------------
function log(level, message, data) {
    const timestamp = new Date().toISOString();
    const entry = { timestamp, level, message };
    if (data !== undefined) entry.data = data;
    results.push(entry);

    const line = `[${timestamp}] ${level.toUpperCase().padEnd(5)} ${message}`;
    console.log(line);
    if (data) {
        const dataStr = typeof data === 'string' ? data : JSON.stringify(data, null, 2);
        const truncated = dataStr.length > 2000
            ? dataStr.substring(0, 2000) + '\n  ... [truncated — ' + dataStr.length + ' chars total]'
            : dataStr;
        console.log('  ' + truncated.split('\n').join('\n  '));
    }
}

function logPass(testName, data) { log('pass', `PASS: ${testName}`, data); }
function logFail(testName, data) { log('fail', `FAIL: ${testName}`, data); }
function logInfo(message, data)  { log('info', message, data); }
function logWarn(message, data)  { log('warn', message, data); }

// ---------------------------------------------------------------------------
// Test runner
// ---------------------------------------------------------------------------
async function runTest(name, fn) {
    logInfo(`--- Running: ${name} ---`);
    const start = Date.now();
    try {
        await fn();
        logPass(name, { durationMs: Date.now() - start });
        return true;
    } catch (err) {
        logFail(name, { error: err.message, durationMs: Date.now() - start });
        return false;
    }
}

function assert(condition, message) {
    if (!condition) throw new Error('Assertion failed: ' + message);
}

// ---------------------------------------------------------------------------
// Use Case 1: Token Acquisition (GET /api/v1/auth/get_token)
// Production use: Automatic — every CARD API call acquires/reuses a token
// ---------------------------------------------------------------------------
async function testTokenAcquisition() {
    const result = await cardApi.testConnection();
    assert(result.ok, 'Token acquisition should succeed. Got: ' + JSON.stringify(result));
    logInfo('Token acquired (truncated):', result.token);
}

// ---------------------------------------------------------------------------
// Use Case 2: List Teams (GET /api/v1/teams)
// Production use: Populate team dropdowns in Confirm/Decline/Redirect forms
// ---------------------------------------------------------------------------
async function testListTeams() {
    const result = await cardApi.getTeams();
    assert(result.ok, 'List teams should succeed. Got HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));

    let teams;
    try {
        teams = JSON.parse(result.body);
    } catch (_) {
        teams = result.body;
    }

    const teamList = Array.isArray(teams) ? teams : (teams && teams.teams) || [];
    logInfo('Teams returned:', { count: teamList.length, sample: teamList.slice(0, 10) });

    // Extract team name — CARD API uses card_team_name or _id
    function extractTeamName(t) {
        if (typeof t === 'string') return t;
        return t.card_team_name || t._id || t.name || t.teamName || '';
    }

    // If CLI specified a team, use it directly; otherwise auto-discover
    if (CLI_TEAM && teamList.length > 0) {
        const cliUpper = CLI_TEAM.toUpperCase();
        const match = teamList.find(t => extractTeamName(t).toUpperCase() === cliUpper);
        if (match) {
            discoveredTeam = extractTeamName(match);
            logInfo('Using CLI-specified team:', discoveredTeam);
        } else {
            // Fuzzy: check if any team contains the CLI string
            const fuzzy = teamList.find(t => extractTeamName(t).toUpperCase().includes(cliUpper));
            if (fuzzy) {
                discoveredTeam = extractTeamName(fuzzy);
                logInfo('CLI team "' + CLI_TEAM + '" not exact — fuzzy matched:', discoveredTeam);
            } else {
                logWarn('CLI team "' + CLI_TEAM + '" not found in ' + teamList.length + ' teams. Falling back to auto-discover.');
            }
        }
    }

    // Auto-discover if CLI didn't resolve
    if (!discoveredTeam && teamList.length > 0) {
        const steamTeam = teamList.find(t => {
            const name = extractTeamName(t);
            return name.includes('NTS-AEO-STEAM') || name.includes('STEAM');
        });
        discoveredTeam = steamTeam
            ? extractTeamName(steamTeam)
            : extractTeamName(teamList[0]);
        logInfo('Using team for subsequent tests:', discoveredTeam);
    }

    assert(teamList.length > 0, 'Should return at least one team');
}

// ---------------------------------------------------------------------------
// Use Case 3: List Team Assets (GET /api/v1/team/{teamName}/assets)
// Production use: Asset search UI — find Granite IDs for reassigned assets
// NOTE: CARD API requires a disposition filter — unfiltered calls return 500.
// ---------------------------------------------------------------------------
async function testListTeamAssets() {
    assert(discoveredTeam, 'Need a team from previous test');

    // CARD API requires disposition — use 'confirmed' as the default
    const result = await cardApi.getTeamAssets(discoveredTeam, { disposition: 'confirmed', pageSize: 10 });
    assert(result.ok, 'List team assets should succeed. Got HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));

    let data;
    try {
        data = JSON.parse(result.body);
    } catch (_) {
        data = result.body;
    }

    const assets = Array.isArray(data) ? data : (data && data.assets) || (data && data.results) || [];
    const total  = data && data.total !== undefined ? data.total : assets.length;
    logInfo('Team assets (confirmed):', { team: discoveredTeam, total, returned: assets.length, sample: assets.slice(0, 3) });

    // Grab first asset ID for owner lookup test
    if (assets.length > 0) {
        const first = assets[0];
        discoveredAssetId = first.asset_id || first.assetId || first.id || first.ipn || first._id || null;
        if (typeof first === 'string') discoveredAssetId = first;
        logInfo('Using asset for subsequent tests:', discoveredAssetId);
    }
}

// ---------------------------------------------------------------------------
// Use Case 4: List Team Assets with Disposition Filter
// Production use: Filter assets by confirmed/unconfirmed/declined/candidate
// ---------------------------------------------------------------------------
async function testListTeamAssetsFiltered() {
    assert(discoveredTeam, 'Need a team from previous test');

    const dispositions = ['confirmed', 'unconfirmed', 'declined', 'candidate'];
    for (const disposition of dispositions) {
        const result = await cardApi.getTeamAssets(discoveredTeam, { disposition, pageSize: 5 });
        let count = '?';
        try {
            const data = JSON.parse(result.body);
            const assets = Array.isArray(data) ? data : (data && data.assets) || (data && data.results) || [];
            count = data && data.total !== undefined ? data.total : assets.length;
        } catch (_) { /* ignore parse errors */ }

        logInfo(`  ${disposition}: HTTP ${result.status}, count=${count}`);

        // We don't assert success here — some dispositions may return 0 results
        // but the endpoint should still respond with 200
        assert(
            result.status >= 200 && result.status < 500,
            `${disposition} filter should not return server error. Got HTTP ${result.status}`
        );
    }
}

// ---------------------------------------------------------------------------
// Use Case 5: Get Owner Record (GET /api/v1/owner/{assetId})
// Production use: Retrieve update_token before confirm/decline/redirect
// ---------------------------------------------------------------------------
async function testGetOwner() {
    assert(discoveredAssetId, 'Need an asset ID from previous test');

    const result = await cardApi.getOwner(discoveredAssetId);
    assert(result.ok, 'Get owner should succeed. Got HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));

    let ownerData;
    try {
        ownerData = JSON.parse(result.body);
    } catch (_) {
        ownerData = result.body;
    }

    logInfo('Owner record:', ownerData);

    // Extract update_token — CARD nests it inside owner object
    const updateToken = (ownerData && ownerData.owner && ownerData.owner.update_token)
        || (ownerData && ownerData.update_token)
        || null;

    if (updateToken) {
        discoveredUpdateToken = updateToken;
        logInfo('update_token acquired:', discoveredUpdateToken);
    } else {
        logWarn('No update_token in owner response — mutation tests will be skipped');
    }
}

// ---------------------------------------------------------------------------
// Use Case 6: Token Reuse (verify caching works)
// Production use: Consecutive API calls should reuse the cached token
// ---------------------------------------------------------------------------
async function testTokenReuse() {
    // Make two rapid calls — second should reuse the cached token
    const start1 = Date.now();
    const r1 = await cardApi.getTeams();
    const dur1 = Date.now() - start1;

    const start2 = Date.now();
    const r2 = await cardApi.getTeams();
    const dur2 = Date.now() - start2;

    assert(r1.ok, 'First call should succeed');
    assert(r2.ok, 'Second call should succeed');

    logInfo('Token reuse timing:', { firstCallMs: dur1, secondCallMs: dur2 });
    // Second call should generally be faster (no token acquisition), but we
    // don't assert timing — just log it for review
}

// ---------------------------------------------------------------------------
// Use Case 7: Confirm Asset (POST /api/v2/owner/{assetId}/confirm)
// Production use: User clicks "Confirm" on a CARD queue item
// NOTE: This is a MUTATION — only runs if we have a valid update_token
//       and the asset is in a confirmable state. May fail in UAT if the
//       asset state doesn't allow confirmation. That's expected.
// ---------------------------------------------------------------------------
async function testConfirmAsset() {
    assert(discoveredAssetId, 'Need an asset ID');
    assert(discoveredTeam, 'Need a team name');

    if (!discoveredUpdateToken) {
        logWarn('Skipping confirm test — no update_token available');
        return;
    }

    // Re-fetch update_token to ensure it's current
    const ownerRes = await cardApi.getOwner(discoveredAssetId);
    assert(ownerRes.ok, 'Owner re-fetch should succeed');
    const ownerData = JSON.parse(ownerRes.body);
    const token = (ownerData.owner && ownerData.owner.update_token) || ownerData.update_token;
    assert(token, 'Should have update_token for confirm');

    const result = await cardApi.confirmAsset(
        discoveredAssetId,
        discoveredTeam,
        token,
        'STEAM Dashboard UAT test — confirm'
    );

    logInfo('Confirm result:', { status: result.status, body: (result.body || '').substring(0, 500) });

    // Accept 200-299 as success, but also accept 400/409 (asset may already
    // be confirmed or in a state that doesn't allow confirmation in UAT)
    if (result.ok) {
        logInfo('Confirm succeeded');
    } else if (result.status === 400 || result.status === 409 || result.status === 422) {
        logWarn('Confirm returned ' + result.status + ' — asset may already be in confirmed state (expected in UAT)');
    } else {
        assert(false, 'Confirm returned unexpected HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));
    }
}

// ---------------------------------------------------------------------------
// Use Case 8: Decline Asset (POST /api/v2/owner/{assetId}/decline)
// Production use: User clicks "Decline" on a CARD queue item
// ---------------------------------------------------------------------------
async function testDeclineAsset() {
    assert(discoveredAssetId, 'Need an asset ID');
    assert(discoveredTeam, 'Need a team name');

    if (!discoveredUpdateToken) {
        logWarn('Skipping decline test — no update_token available');
        return;
    }

    // Re-fetch update_token
    const ownerRes = await cardApi.getOwner(discoveredAssetId);
    assert(ownerRes.ok, 'Owner re-fetch should succeed');
    const ownerData = JSON.parse(ownerRes.body);
    const token = (ownerData.owner && ownerData.owner.update_token) || ownerData.update_token;
    assert(token, 'Should have update_token for decline');

    const result = await cardApi.declineAsset(
        discoveredAssetId,
        discoveredTeam,
        token,
        'STEAM Dashboard UAT test — decline'
    );

    logInfo('Decline result:', { status: result.status, body: (result.body || '').substring(0, 500) });

    if (result.ok) {
        logInfo('Decline succeeded');
    } else if (result.status === 400 || result.status === 409 || result.status === 422) {
        logWarn('Decline returned ' + result.status + ' — asset may not be in a declinable state (expected in UAT)');
    } else {
        assert(false, 'Decline returned unexpected HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));
    }
}

// ---------------------------------------------------------------------------
// Use Case 9: Redirect Asset (POST /api/v2/owner/{assetId}/{from}/redirect)
// Production use: User clicks "Redirect" on a CARD queue item
// NOTE: Requires two different teams. We'll attempt it but expect it may
//       fail in UAT if only one team is available.
// ---------------------------------------------------------------------------
async function testRedirectAsset() {
    assert(discoveredAssetId, 'Need an asset ID');
    assert(discoveredTeam, 'Need a team name');

    if (!discoveredUpdateToken) {
        logWarn('Skipping redirect test — no update_token available');
        return;
    }

    // We need a second team for redirect. Try to find one from the teams list.
    const teamsRes = await cardApi.getTeams();
    let teams = [];
    try {
        const parsed = JSON.parse(teamsRes.body);
        teams = Array.isArray(parsed) ? parsed : (parsed.teams || []);
    } catch (_) { /* ignore */ }

    const teamNames = teams.map(t => typeof t === 'string' ? t : (t.card_team_name || t._id || t.name || t.teamName || ''));
    const otherTeam = teamNames.find(t => t && t !== discoveredTeam);

    if (!otherTeam) {
        logWarn('Only one team available — cannot test redirect (requires from and to teams)');
        return;
    }

    logInfo('Redirect test:', { from: discoveredTeam, to: otherTeam });

    // Re-fetch update_token
    const ownerRes = await cardApi.getOwner(discoveredAssetId);
    assert(ownerRes.ok, 'Owner re-fetch should succeed');
    const ownerData = JSON.parse(ownerRes.body);
    const token = (ownerData.owner && ownerData.owner.update_token) || ownerData.update_token;
    assert(token, 'Should have update_token for redirect');

    const result = await cardApi.redirectAsset(
        discoveredAssetId,
        discoveredTeam,
        otherTeam,
        token
    );

    logInfo('Redirect result:', { status: result.status, body: (result.body || '').substring(0, 500) });

    if (result.ok) {
        logInfo('Redirect succeeded');
    } else if (result.status === 400 || result.status === 409 || result.status === 422) {
        logWarn('Redirect returned ' + result.status + ' — asset may not be in a redirectable state (expected in UAT)');
    } else {
        assert(false, 'Redirect returned unexpected HTTP ' + result.status + ': ' + (result.body || '').substring(0, 500));
    }
}

// ---------------------------------------------------------------------------
// Main
// ---------------------------------------------------------------------------
async function main() {
    logInfo('=== STEAM Dashboard — CARD API UAT Test Run ===');
    logInfo('Timestamp: ' + new Date().toISOString());
    logInfo('CARD_API_URL: ' + (process.env.CARD_API_URL || '(not set)'));
    logInfo('CARD_API_USER: ' + (process.env.CARD_API_USER || '(not set)'));
    logInfo('CARD_SKIP_TLS: ' + (process.env.CARD_SKIP_TLS || 'false'));
    logInfo('isConfigured: ' + cardApi.isConfigured);
    logInfo('');

    if (!cardApi.isConfigured) {
        logFail('Pre-flight check', {
            error: 'CARD API is not configured. Set CARD_API_URL, CARD_API_USER, and CARD_API_PASS in backend/.env',
            missing: cardApi.missingVars,
        });
        writeLog();
        process.exit(1);
    }

    let passed = 0;
    let failed = 0;

    // Read-only tests first (safe to run in any environment)
    if (await runTest('1. Token Acquisition (GET /auth/get_token)', testTokenAcquisition)) passed++; else failed++;
    if (await runTest('2. List Teams (GET /teams)', testListTeams)) passed++; else failed++;
    if (await runTest('3. List Team Assets (GET /team/{name}/assets)', testListTeamAssets)) passed++; else failed++;
    if (await runTest('4. List Team Assets — Disposition Filters', testListTeamAssetsFiltered)) passed++; else failed++;
    if (await runTest('5. Get Owner Record (GET /owner/{assetId})', testGetOwner)) passed++; else failed++;
    if (await runTest('6. Token Reuse (caching verification)', testTokenReuse)) passed++; else failed++;

    // Mutation tests — these modify asset state in CARD
    logInfo('');
    logInfo('=== Mutation Tests (modify asset state) ===');
    logInfo('These tests exercise confirm/decline/redirect. They may return');
    logInfo('4xx if the asset is not in the correct state — that is expected.');
    logInfo('');

    if (await runTest('7. Confirm Asset (POST /owner/{id}/confirm)', testConfirmAsset)) passed++; else failed++;
    if (await runTest('8. Decline Asset (POST /owner/{id}/decline)', testDeclineAsset)) passed++; else failed++;
    if (await runTest('9. Redirect Asset (POST /owner/{id}/{from}/redirect)', testRedirectAsset)) passed++; else failed++;

    logInfo('');
    logInfo('=== Summary ===');
    logInfo(`Passed: ${passed}  |  Failed: ${failed}  |  Total: ${passed + failed}`);
    if (discoveredTeam) logInfo('Team used: ' + discoveredTeam);
    if (discoveredAssetId) logInfo('Asset used: ' + discoveredAssetId);

    writeLog();

    if (failed > 0) {
        console.log('\nSome tests failed. Review the log above and card-uat-test.log for details.');
        process.exit(1);
    } else {
        console.log('\nAll tests passed. Log saved to backend/scripts/card-uat-test.log');
        process.exit(0);
    }
}

function writeLog() {
    const lines = results.map(r => {
        let line = `[${r.timestamp}] ${r.level.toUpperCase().padEnd(5)} ${r.message}`;
        if (r.data) {
            const dataStr = typeof r.data === 'string' ? r.data : JSON.stringify(r.data, null, 2);
            const truncated = dataStr.length > 2000
                ? dataStr.substring(0, 2000) + '\n  ... [truncated — ' + dataStr.length + ' chars total]'
                : dataStr;
            line += '\n  ' + truncated.split('\n').join('\n  ');
        }
        return line;
    });
    fs.writeFileSync(LOG_FILE, lines.join('\n') + '\n', 'utf8');
}

main().catch(err => {
    console.error('Unhandled error:', err);
    process.exit(1);
});