/**
 * Dealer termination E2E — follows the same stage order and APIs as the UI.
 *
 * Usage:
 *   node trigger-termination.js
 *   node trigger-termination.js --terminationId=<uuid> --delayMs=800
 *   node trigger-termination.js --category=Unethical --skipClearances=true
 */
const args = Object.fromEntries(
    process.argv
        .slice(2)
        .map((arg) => arg.replace(/^--/, '').split('='))
        .map(([k, v]) => [k, v ?? 'true'])
);
const BASE_URL = args.baseUrl || process.env.BASE_URL || 'http://localhost:5000/api';
const PASSWORD = 'Admin@123';
const STEP_DELAY_MS = Number(args.delayMs || 800);
const SHOULD_SKIP_CLEARANCES = String(args.skipClearances || 'false') === 'true';

const EMAILS = {
    DD_ADMIN: 'lince@royalenfield.com',
    ASM: 'abhishek@royalenfield.com',
    RBM: 'manish@royalenfield.com',
    DD_ZM: 'piyush@royalenfield.com',
    ZBH: 'manav@royalenfield.com',
    DD_LEAD: 'jaya@royalenfield.com',
    DD_HEAD: 'ganesh@royalenfield.com',
    LEGAL: 'legal@royalenfield.com',
    NBH: 'yashwin@royalenfield.com',
    CCO: 'cco@royalenfield.com',
    CEO: 'ceo@royalenfield.com'
};

/** Canonical stage labels (match TERMINATION_STAGES + UI timeline). */
const STAGES = {
    RBM: 'RBM + DD-ZM Review',
    ZBH: 'ZBH Review',
    DD_LEAD: 'DD Lead Review',
    LEGAL: 'Legal Verification',
    DD_HEAD: 'DD Head Review',
    NBH: 'NBH Evaluation',
    SCN: 'Show Cause Notice (SCN)',
    SCN_EVAL: 'Evaluation of Dealer SCN Response',
    NBH_FINAL: 'NBH Final Approval',
    CCO: 'CCO Approval',
    CEO: 'CEO Final Approval',
    LEGAL_LETTER: 'Legal - Termination Letter',
    TERMINATED: 'Terminated'
};

async function apiRequest(endpoint, method = 'GET', body = null, token = null, isFormData = false) {
    const headers = {};
    if (token) headers['Authorization'] = `Bearer ${token}`;
    if (!isFormData) headers['Content-Type'] = 'application/json';

    const config = { method, headers };
    if (body) config.body = isFormData ? body : JSON.stringify(body);

    const response = await fetch(`${BASE_URL}${endpoint}`, config);
    const data = await response.json().catch(() => ({}));

    if (!response.ok) {
        throw new Error(`API Error ${method} ${endpoint}: ${JSON.stringify(data)}`);
    }
    return data;
}

async function login(email) {
    if (!login.cache) login.cache = {};
    if (login.cache[email]) return login.cache[email];
    const data = await apiRequest('/auth/login', 'POST', { email, password: PASSWORD });
    login.cache[email] = data.token;
    return login.cache[email];
}

const delay = (ms = STEP_DELAY_MS) => new Promise((res) => setTimeout(res, ms));
const log = (step, msg) => console.log(`[STEP ${step}] ${msg}`);

async function fetchTermination(terminationId, token) {
    const data = await apiRequest(`/termination/${terminationId}`, 'GET', null, token);
    return data.termination;
}

async function waitUntilStage(terminationId, expectedStage, token, maxAttempts = 50) {
    for (let attempt = 0; attempt < maxAttempts; attempt++) {
        const t = await fetchTermination(terminationId, token);
        if (t.currentStage === expectedStage) return t;
        await delay(250);
    }
    const last = await fetchTermination(terminationId, token);
    throw new Error(
        `Timed out waiting for stage "${expectedStage}" (still at "${last.currentStage}", status="${last.status}")`
    );
}

async function approveTermination(terminationId, email, remarks) {
    const token = await login(email);
    return apiRequest(
        `/termination/${terminationId}/status`,
        'PUT',
        { action: 'approve', remarks },
        token
    );
}

/** RBM+DD-ZM and SCN evaluation require two/four partial approvals before the stage advances. */
async function runJointApprovals(terminationId, actors, nextStage, adminToken, stepLabel) {
    log(stepLabel, `Joint approvals at ${nextStage ? 'current' : '?'} → expect "${nextStage}"`);

    for (const actor of actors) {
        const res = await approveTermination(terminationId, actor.email, actor.remarks);
        const message = res.message || res.data?.message || '';
        log(stepLabel, `${actor.email}: ${message}`);
        await delay(300);

        const t = await fetchTermination(terminationId, adminToken);
        if (nextStage && t.currentStage === nextStage) {
            log(stepLabel, `Advanced to ${nextStage}`);
            return t;
        }
    }

    return waitUntilStage(terminationId, nextStage, adminToken);
}

async function runSingleApproval(terminationId, email, remarks, nextStage, adminToken, stepLabel) {
    const res = await approveTermination(terminationId, email, remarks);
    log(stepLabel, `${email}: ${res.message || 'approved'}`);
    await delay(300);
    return waitUntilStage(terminationId, nextStage, adminToken);
}

async function finalizeTermination(terminationId, email, nextStage, remarks, stepLabel, adminToken) {
    const token = await login(email);
    const res = await apiRequest(
        `/termination/${terminationId}/finalize`,
        'POST',
        { decision: 'Approve', remarks },
        token
    );
    log(stepLabel, `${email} finalize → ${res.message || 'ok'}`);
    await delay(300);
    return waitUntilStage(terminationId, nextStage, adminToken);
}

async function uploadScnResponsePlaceholder(terminationId) {
    const token = await login(EMAILS.DD_ADMIN);
    const form = new FormData();
    // Multer only allows PDF/images/office — use minimal PDF bytes
    const pdfBytes = Buffer.from(
        '%PDF-1.4\n1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj 2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj 3 0 obj<</Type/Page/MediaBox[0 0 3 3]/Parent 2 0 R>>endobj\nxref\n0 4\ntrailer<</Size 4/Root 1 0 R>>\nstartxref\n0\n%%EOF'
    );
    const blob = new Blob([pdfBytes], { type: 'application/pdf' });
    form.append('file', blob, 'scn-response-e2e.pdf');
    form.append('remarks', 'Dealer SCN response uploaded (E2E script).');

    await apiRequest(`/termination/${terminationId}/scn-response`, 'POST', form, token, true);
    log('SCN', 'SCN response uploaded by DD Admin');
}

const STAGE_ORDER = [
    STAGES.RBM,
    STAGES.ZBH,
    STAGES.DD_LEAD,
    STAGES.LEGAL,
    STAGES.DD_HEAD,
    STAGES.NBH,
    STAGES.SCN,
    STAGES.SCN_EVAL,
    STAGES.NBH_FINAL,
    STAGES.CCO,
    STAGES.CEO,
    STAGES.LEGAL_LETTER,
    STAGES.TERMINATED
];

function stageIndex(stage) {
    const idx = STAGE_ORDER.indexOf(stage);
    return idx >= 0 ? idx : 0;
}

function shouldRun(resumeFromStage, targetStage) {
    return stageIndex(resumeFromStage) <= stageIndex(targetStage);
}

async function runWorkflowFromStage(terminationId, resumeFromStage, adminToken, isUnethicalCategory) {
    let step = 2;

    if (isUnethicalCategory) {
        log(step++, 'Unethical category — workflow starts at DD Lead (RBM/ZBH not used).');
    }

    if (!isUnethicalCategory && shouldRun(resumeFromStage, STAGES.RBM)) {
        await runJointApprovals(
            terminationId,
            [
                { email: EMAILS.RBM, remarks: 'RBM validation complete.' },
                { email: EMAILS.DD_ZM, remarks: 'DD-ZM confirmed escalation.' }
            ],
            STAGES.ZBH,
            adminToken,
            step
        );
        await delay();
    }

    if (!isUnethicalCategory && shouldRun(resumeFromStage, STAGES.ZBH)) {
        await runSingleApproval(terminationId, EMAILS.ZBH, 'Strategic decision aligned.', STAGES.DD_LEAD, adminToken, step++);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.DD_LEAD)) {
        await runSingleApproval(
            terminationId,
            EMAILS.DD_LEAD,
            isUnethicalCategory ? 'Immediate escalation — breaches documented.' : 'Breaches documented.',
            STAGES.LEGAL,
            adminToken,
            step++
        );
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.LEGAL)) {
        await runSingleApproval(terminationId, EMAILS.LEGAL, 'Case is sound.', STAGES.DD_HEAD, adminToken, step++);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.DD_HEAD)) {
        await runSingleApproval(terminationId, EMAILS.DD_HEAD, 'Strategic impact assessed.', STAGES.NBH, adminToken, step++);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.NBH)) {
        await runSingleApproval(terminationId, EMAILS.NBH, 'Functional teams aligned.', STAGES.SCN, adminToken, step++);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.SCN)) {
        const atScn = await fetchTermination(terminationId, adminToken);
        if (atScn.currentStage === STAGES.SCN) {
            await uploadScnResponsePlaceholder(terminationId);
            await waitUntilStage(terminationId, STAGES.SCN_EVAL, adminToken);
        }
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.SCN_EVAL)) {
        await runJointApprovals(
            terminationId,
            [
                { email: EMAILS.DD_LEAD, remarks: 'SCN response reviewed by DD Lead.' },
                { email: EMAILS.ZBH, remarks: 'SCN response reviewed by ZBH.' },
                { email: EMAILS.RBM, remarks: 'SCN response reviewed by RBM.' },
                { email: EMAILS.DD_HEAD, remarks: 'SCN response reviewed by DD Head.' }
            ],
            STAGES.NBH_FINAL,
            adminToken,
            step
        );
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.NBH_FINAL)) {
        await finalizeTermination(terminationId, EMAILS.NBH, STAGES.CCO, 'NBH final authorization.', step++, adminToken);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.CCO)) {
        await finalizeTermination(terminationId, EMAILS.CCO, STAGES.CEO, 'CCO authorization.', step++, adminToken);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.CEO)) {
        await finalizeTermination(terminationId, EMAILS.CEO, STAGES.LEGAL_LETTER, 'CEO final authorization.', step++, adminToken);
        await delay();
    }

    if (shouldRun(resumeFromStage, STAGES.LEGAL_LETTER)) {
        await runSingleApproval(
            terminationId,
            EMAILS.LEGAL,
            'Termination letter issued.',
            STAGES.TERMINATED,
            adminToken,
            step++
        );
        await delay();
    }

    const afterLegal = await fetchTermination(terminationId, adminToken);
    if (afterLegal.currentStage === STAGES.TERMINATED) {
        log(step, `Terminated (status: ${afterLegal.status}). Use Push to F&F in UI when LWD is reached.`);
    }
}

async function run() {
    try {
        console.log('--- STARTING DEALER TERMINATION E2E FLOW (UI-aligned) ---');

        const adminToken = await login(EMAILS.DD_ADMIN);
        const dealersRes = await apiRequest('/dealer', 'GET', null, adminToken);
        const targetDealer = dealersRes.data[0];

        if (!targetDealer) throw new Error('No dealer profiles found. Run seed first.');

        console.log(`Targeting Dealer: ${targetDealer.legalName} (${targetDealer.id})`);

        let terminationId = args.terminationId;
        const isUnethical = String(args.category || '').trim().toLowerCase().includes('unethical');

        if (!terminationId) {
            log(1, 'Creating termination (ASM)...');
            const asmToken = await login(EMAILS.ASM);

            // Backend (termination.controller.ts) requires at least one .ppt/.pptx
            // file for non-Super-Admin initiators, sent as multipart "files".
            const form = new FormData();
            form.append('dealerId', targetDealer.id);
            form.append('category', args.category || 'Performance');
            form.append('reason', args.reason || 'Consistently failed to meet commitment targets.');
            form.append('proposedLwd', new Date().toISOString().split('T')[0]);
            form.append('comments', 'E2E termination — follows UI stage order (no stacked partial approvals).');

            const dummyPptxBytes = Buffer.from('E2E placeholder presentation');
            const dummyPptxBlob = new Blob([dummyPptxBytes], {
                type: 'application/vnd.openxmlformats-officedocument.presentationml.presentation'
            });
            form.append('files', dummyPptxBlob, 'e2e-termination-presentation.pptx');

            const createRes = await apiRequest('/termination', 'POST', form, asmToken, true);
            terminationId = createRes.termination.id;
            log(1, `Created: ${terminationId} (${args.category || 'Performance'})`);
        } else {
            log(1, `Resuming: ${terminationId}`);
        }

        await delay();

        let termination = await fetchTermination(terminationId, adminToken);
        log('INFO', `Starting stage: ${termination.currentStage} | status: ${termination.status}`);

        const resumeFrom = STAGE_ORDER.includes(termination.currentStage)
            ? termination.currentStage
            : isUnethical
              ? STAGES.DD_LEAD
              : STAGES.RBM;

        if (termination.currentStage === STAGES.TERMINATED || termination.status?.includes('F&F')) {
            log('SKIP', 'Already terminated / in F&F — workflow steps skipped.');
        } else {
            await runWorkflowFromStage(terminationId, resumeFrom, adminToken, isUnethical);
        }

        if (!SHOULD_SKIP_CLEARANCES) {
            termination = await fetchTermination(terminationId, adminToken);
            const fnfId = termination.fnfSettlement?.id;
            if (!fnfId) {
                log('F&F', 'No FnF record yet (expected until Push to F&F after LWD). Skipping clearances.');
            } else {
                log('F&F', 'Running department clearances...');
                const departments = [
                    { name: 'Warranty Department', status: 'Cleared', amount: 0, type: 'Receivable', remarks: 'No pending claims.' },
                    { name: 'Sales Department', status: 'Cleared', amount: 0, type: 'Receivable', remarks: 'Allocations transferred.' }
                ];
                for (const dept of departments) {
                    await apiRequest(
                        `/termination/${terminationId}/clearance`,
                        'PUT',
                        dept,
                        adminToken
                    );
                    await delay(200);
                }
            }
        }

        const finalDetails = await fetchTermination(terminationId, adminToken);
        console.log(`[FINAL] stage=${finalDetails.currentStage} status=${finalDetails.status}`);

        const userRes = await apiRequest('/admin/users', 'GET', null, adminToken);
        const dealerUser = userRes.data?.find((u) => u.dealerId === targetDealer.id);

        if (dealerUser && !dealerUser.isActive && dealerUser.status === 'inactive') {
            console.log(`[VERIFICATION] Dealer portal user ${dealerUser.email} deactivated.`);
        } else if (finalDetails.currentStage === STAGES.TERMINATED) {
            console.log('[VERIFICATION] Terminated — dealer deactivation may occur at Legal Letter stage.');
        }

        console.log('\n--- TERMINATION E2E COMPLETE ---');
        process.exit(0);
    } catch (error) {
        console.error('Workflow failed:', error.message);
        process.exit(1);
    }
}

run();