// apps/hq/test/migrate-onboarding-templates.test.ts — Client Detail redesign task 5: one-time
// migration swapping seeded modules (SMS/RTGS/MobileApp) from the old generic onboarding
// checklist onto their new composed (front + per-module tail) templates, carrying mapped
// ticks (done/done_on/payment_id).
import { describe, it, expect, beforeEach } from 'vitest'
import { openDb, type DB } from '../src/db'
import { seedIfEmpty } from '../src/seed'
import { createClient } from '../src/repos-clients'
import { createModule, assignModule } from '../src/repos-modules'
import { migrateOnboardingTemplates } from '../src/migrate-onboarding-templates'
import { listProjectMilestones, TAIL_FALLBACK } from '../src/repos-milestones'

const FRONT_KEYS = ['enquiry', 'visit_meeting', 'quotation_sent', 'quotation_approved']

describe('onboarding template migration', () => {
  let db: DB
  beforeEach(async () => { db = openDb(':memory:'); await seedIfEmpty(db) })

  async function makeSmsClientModule(): Promise<string> {
    const client = await createClient(db, 'u1', { name: 'Kothavara SCB', stateCode: '32' })
    const mod = await createModule(db, 'u1', { code: 'SMS', name: 'Bulk SMS' })
    const cm = await assignModule(db, 'u1', { clientId: client.id, moduleId: mod.id, kind: 'yearly' })
    // assignModule auto-seeds the NEW composed template (task 2/4) — wipe it so the test
    // can plant the OLD generic rows a legacy project would actually have on disk.
    await db.run(`DELETE FROM project_milestone WHERE client_module_id=?`, cm.id)
    return cm.id
  }

  async function seedOldGenericRows(cmId: string): Promise<void> {
    const rows: [string, number, string | null][] = [
      ['advance_paid', 0, null], ['setup_done', 0, null], ['installed', 1, '2026-03-25'],
      ['go_live', 1, '2026-04-02'], ['balance_paid', 0, null], ['amc_start', 0, null],
    ]
    for (const [i, r] of rows.entries()) {
      await db.run(
        `INSERT INTO project_milestone (id,client_module_id,key,label,done,done_on,sort)
         VALUES (?,?,?,?,?,?,?)`,
        `m${i}`, cmId, r[0], String(r[0]), r[1], r[2], i,
      )
    }
  }

  it('swaps an SMS project to the composed front+tail list carrying installed+go_live ticks', async () => {
    const cmId = await makeSmsClientModule()
    await seedOldGenericRows(cmId)

    const res = await migrateOnboardingTemplates(db)
    expect(res.projects).toBe(1)
    expect(res.carried).toBe(2) // installed -> installation, go_live -> go_live
    expect(res.dropped).toBe(0) // the two dropped keys (setup_done, amc_start) were both undone

    const ms = await listProjectMilestones(db, cmId)
    expect(ms.map((m) => m.key)).toEqual([
      ...FRONT_KEYS,
      'document_collection', 'dlt_registration', 'account_creation', 'installation',
      'testing', 'training', 'go_live', 'payment_received',
    ])
    const installation = ms.find((m) => m.key === 'installation')!
    expect(installation.done).toBe(true)
    expect(installation.doneOn).toBe('2026-03-25')
    expect(installation.paymentId).toBeNull()
    const goLive = ms.find((m) => m.key === 'go_live')!
    expect(goLive.done).toBe(true)
    expect(goLive.doneOn).toBe('2026-04-02')
    // untouched (never ticked) steps stay pending, including the newly-prepended front
    expect(ms.find((m) => m.key === 'enquiry')!.done).toBe(false)
    expect(ms.find((m) => m.key === 'quotation_approved')!.done).toBe(false)
    expect(ms.find((m) => m.key === 'document_collection')!.done).toBe(false)
    expect(ms.find((m) => m.key === 'payment_received')!.done).toBe(false)
    // old setup_done / amc_start gone entirely
    expect(ms.some((m) => m.key === 'setup_done' || m.key === 'amc_start')).toBe(false)

    // audited
    const audits = await db.all<{ entity_id: string; after_json: string | null }>(
      `SELECT entity_id, after_json FROM audit_log WHERE action='migrate_onboarding'`,
    )
    expect(audits).toHaveLength(1)
    expect(audits[0]!.entity_id).toBe(cmId)
    expect(audits[0]!.after_json).toContain('installation')
  })

  it('carries a done payment_id along with the mapped tick (advance_paid -> payment_received)', async () => {
    const cmId = await makeSmsClientModule()
    const client = await db.get<{ client_id: string }>(
      `SELECT client_id FROM client_module WHERE id=?`, cmId,
    )
    const paymentId = 'pay-1'
    await db.run(
      `INSERT INTO payment (id, client_id, received_on, mode, amount_paise, created_by, created_at)
       VALUES (?, ?, '2026-03-01', 'bank', 500000, 'u1', '2026-03-01T00:00:00.000Z')`,
      paymentId, client!.client_id,
    )
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, payment_id, sort)
       VALUES (?,?,?,?,?,?,?,?)`,
      'm0', cmId, 'advance_paid', 'advance_paid', 1, '2026-03-01', paymentId, 0,
    )

    await migrateOnboardingTemplates(db)
    const ms = await listProjectMilestones(db, cmId)
    const paymentReceived = ms.find((m) => m.key === 'payment_received')!
    expect(paymentReceived.done).toBe(true)
    expect(paymentReceived.doneOn).toBe('2026-03-01')
    expect(paymentReceived.paymentId).toBe(paymentId)
  })

  it('balance_paid also maps to payment_received', async () => {
    const cmId = await makeSmsClientModule()
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, sort)
       VALUES (?,?,?,?,?,?,?)`,
      'm0', cmId, 'balance_paid', 'balance_paid', 1, '2026-04-10', 0,
    )

    await migrateOnboardingTemplates(db)
    const ms = await listProjectMilestones(db, cmId)
    const paymentReceived = ms.find((m) => m.key === 'payment_received')!
    expect(paymentReceived.done).toBe(true)
    expect(paymentReceived.doneOn).toBe('2026-04-10')
  })

  // The interim shape shipped mid-redesign split the payment step in two
  // (advance_payment / balance_payment) before it was collapsed into one
  // `payment_received` step. A DB written by that build must migrate too.
  it('maps the interim advance_payment key (with its payment link) to payment_received', async () => {
    const cmId = await makeSmsClientModule()
    const client = await db.get<{ client_id: string }>(
      `SELECT client_id FROM client_module WHERE id=?`, cmId,
    )
    const paymentId = 'pay-interim'
    await db.run(
      `INSERT INTO payment (id, client_id, received_on, mode, amount_paise, created_by, created_at)
       VALUES (?, ?, '2026-06-01', 'bank', 250000, 'u1', '2026-06-01T00:00:00.000Z')`,
      paymentId, client!.client_id,
    )
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, payment_id, sort)
       VALUES (?,?,?,?,?,?,?,?)`,
      'm0', cmId, 'advance_payment', 'Advance payment', 1, '2026-06-01', paymentId, 0,
    )

    const res = await migrateOnboardingTemplates(db)
    expect(res.carried).toBe(1)
    expect(res.dropped).toBe(0)
    const ms = await listProjectMilestones(db, cmId)
    expect(ms.some((m) => m.key === 'advance_payment')).toBe(false)
    const paymentReceived = ms.find((m) => m.key === 'payment_received')!
    expect(paymentReceived.done).toBe(true)
    expect(paymentReceived.doneOn).toBe('2026-06-01')
    expect(paymentReceived.paymentId).toBe(paymentId)
  })

  it('maps the interim balance_payment key to payment_received', async () => {
    const cmId = await makeSmsClientModule()
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, sort)
       VALUES (?,?,?,?,?,?,?)`,
      'm0', cmId, 'balance_payment', 'Balance payment', 1, '2026-06-20', 0,
    )

    const res = await migrateOnboardingTemplates(db)
    expect(res.dropped).toBe(0)
    const ms = await listProjectMilestones(db, cmId)
    expect(ms.some((m) => m.key === 'balance_payment')).toBe(false)
    const paymentReceived = ms.find((m) => m.key === 'payment_received')!
    expect(paymentReceived.done).toBe(true)
    expect(paymentReceived.doneOn).toBe('2026-06-20')
  })

  it('carries a quotation-step document link across the swap', async () => {
    const cmId = await makeSmsClientModule()
    const client = await db.get<{ client_id: string }>(
      `SELECT client_id FROM client_module WHERE id=?`, cmId,
    )
    const documentId = 'doc-1'
    await db.run(
      `INSERT INTO document (id, doc_type, fy, client_id, doc_date, taxable_paise, cgst_paise,
         sgst_paise, igst_paise, round_off_paise, payable_paise, payload, created_by, created_at)
       VALUES (?, 'QUOTATION', '26-27', ?, '2026-05-01', 100000, 9000, 9000, 0, 0, 118000,
         '{"lines":[]}', 'u1', '2026-05-01T00:00:00.000Z')`,
      documentId, client!.client_id,
    )
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, document_id, sort)
       VALUES (?,?,?,?,?,?,?,?)`,
      'm0', cmId, 'quotation_sent', 'Quotation sent', 1, '2026-05-01', documentId, 0,
    )

    await migrateOnboardingTemplates(db)
    const quotationSent = (await listProjectMilestones(db, cmId)).find((m) => m.key === 'quotation_sent')!
    expect(quotationSent.done).toBe(true)
    expect(quotationSent.documentId).toBe(documentId)
  })

  it('is idempotent (second run changes nothing new)', async () => {
    const cmId = await makeSmsClientModule()
    await seedOldGenericRows(cmId)

    const first = await migrateOnboardingTemplates(db)
    expect(first.projects).toBe(1)
    const afterFirst = await listProjectMilestones(db, cmId)

    const second = await migrateOnboardingTemplates(db)
    expect(second.projects).toBe(0)
    expect(second.carried).toBe(0)
    expect(second.dropped).toBe(0)
    const afterSecond = await listProjectMilestones(db, cmId)
    expect(afterSecond).toEqual(afterFirst)

    // no extra audit rows written on the no-op second pass
    const audits = await db.all<{ n: number }>(
      `SELECT COUNT(*) AS n FROM audit_log WHERE action='migrate_onboarding'`,
    )
    expect((audits[0] as unknown as { n: number }).n).toBe(1)
  })

  it('counts ticked dropped keys (unmapped or not in new template)', async () => {
    const cmId = await makeSmsClientModule()
    // Insert old generic rows with two ticked keys that will be dropped:
    // - amc_start: unmapped (not in KEY_MAP)
    // - setup_done: maps to 'setup_configuration', but SMS template doesn't have it
    // Plus one carried key (installed -> installation) to verify carried count too.
    const rows: [string, number, string | null][] = [
      ['amc_start', 1, '2026-02-15'],        // ticked, unmapped -> dropped
      ['setup_done', 1, '2026-03-01'],       // ticked, maps to setup_configuration but SMS template lacks it -> dropped
      ['installed', 1, '2026-03-25'],        // ticked, maps to installation which IS in SMS template -> carried
      ['advance_paid', 0, null],
      ['go_live', 0, null],
      ['balance_paid', 0, null],
    ]
    for (const [i, r] of rows.entries()) {
      await db.run(
        `INSERT INTO project_milestone (id,client_module_id,key,label,done,done_on,sort)
         VALUES (?,?,?,?,?,?,?)`,
        `m${i}`, cmId, r[0], String(r[0]), r[1], r[2], i,
      )
    }

    const res = await migrateOnboardingTemplates(db)
    expect(res.projects).toBe(1)
    expect(res.carried).toBe(1) // only installed -> installation
    expect(res.dropped).toBe(2) // amc_start (unmapped) + setup_done (not in SMS template)

    // Verify the dropped keys are gone from the migrated template
    const ms = await listProjectMilestones(db, cmId)
    expect(ms.map((m) => m.key)).toEqual([
      ...FRONT_KEYS,
      'document_collection', 'dlt_registration', 'account_creation', 'installation',
      'testing', 'training', 'go_live', 'payment_received',
    ])
    expect(ms.some((m) => m.key === 'amc_start' || m.key === 'setup_done')).toBe(false)

    // Verify the carried installation tick is preserved
    const installation = ms.find((m) => m.key === 'installation')!
    expect(installation.done).toBe(true)
    expect(installation.doneOn).toBe('2026-03-25')
  })

  it('leaves a module without a per-module template untouched', async () => {
    const client = await createClient(db, 'u1', { name: 'Other Society', stateCode: '32' })
    const mod = await createModule(db, 'u1', { code: 'NOTEMPLATE', name: 'No Template Module' })
    const cm = await assignModule(db, 'u1', { clientId: client.id, moduleId: mod.id, kind: 'yearly' })
    // This module has no project.milestone_template:NOTEMPLATE setting, so ensureProjectMilestones
    // composed the front with the code TAIL_FALLBACK (no global 'project.milestone_template' is
    // seeded any more either).
    const before = await listProjectMilestones(db, cm.id)
    expect(before.map((m) => m.key)).toEqual([...FRONT_KEYS, ...TAIL_FALLBACK.map((t) => t.key)])

    const res = await migrateOnboardingTemplates(db)
    expect(res.projects).toBe(0)

    const after = await listProjectMilestones(db, cm.id)
    expect(after).toEqual(before)
  })

  // Final whole-branch review FIX 3: an ad-hoc project-specific step (`+ Add step` /
  // addProjectMilestone, `custom_*` key) must survive the swap — ticked or not — instead of
  // being silently deleted because it's in neither templateKeys nor KEY_MAP.
  it('preserves ad-hoc custom steps (both ticked and un-ticked), appended after the template, with state intact', async () => {
    const cmId = await makeSmsClientModule()
    await seedOldGenericRows(cmId) // baseline so the project isn't already "identical" (forces a rebuild)
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, sort)
       VALUES (?,?,?,?,?,?,?)`,
      'custom-ticked', cmId, 'custom_ab12cd34', 'AWS region confirmed', 1, '2026-05-01', 10,
    )
    await db.run(
      `INSERT INTO project_milestone (id, client_module_id, key, label, done, done_on, sort)
       VALUES (?,?,?,?,?,?,?)`,
      'custom-unticked', cmId, 'custom_ef56gh78', 'Client-specific step', 0, null, 11,
    )

    const res = await migrateOnboardingTemplates(db)
    expect(res.preserved).toBe(2)
    // Neither custom row counts as dropped, even though the ticked one is done=1.
    expect(res.dropped).toBe(0)

    const ms = await listProjectMilestones(db, cmId)
    const ticked = ms.find((m) => m.key === 'custom_ab12cd34')
    expect(ticked).toMatchObject({ label: 'AWS region confirmed', done: true, doneOn: '2026-05-01' })
    const unticked = ms.find((m) => m.key === 'custom_ef56gh78')
    expect(unticked).toMatchObject({ label: 'Client-specific step', done: false, doneOn: null })
    // Appended after the whole template block, sort continuing past it (deterministic order:
    // the ticked one was inserted before the un-ticked one).
    expect(ms.slice(-2).map((m) => m.key)).toEqual(['custom_ab12cd34', 'custom_ef56gh78'])

    // Reflected in the audit's `after` payload.
    const audits = await db.all<{ after_json: string | null }>(
      `SELECT after_json FROM audit_log WHERE action='migrate_onboarding' AND entity_id=?`, cmId,
    )
    expect(audits).toHaveLength(1)
    expect(audits[0]!.after_json).toContain('custom_ab12cd34')
    expect(audits[0]!.after_json).toContain('custom_ef56gh78')
  })

  it('a known old-generic key with no forward mapping (amc_start) is still dropped, not treated as custom', async () => {
    const cmId = await makeSmsClientModule()
    await seedOldGenericRows(cmId) // includes ticked 'installed'/'go_live' and un-ticked 'amc_start'
    const res = await migrateOnboardingTemplates(db)
    expect(res.preserved).toBe(0)
    const ms = await listProjectMilestones(db, cmId)
    expect(ms.some((m) => m.key === 'amc_start')).toBe(false)
  })
})