> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sagozen.digital/llms.txt
> Use this file to discover all available pages before exploring further.

# Project Roadmap

> Development timeline, milestones, and feature implementation status

# Project Roadmap

**Last Updated:** 2026-01-12
**Status:** IN\_PROGRESS | **Completion:** 35%

\##Executive Overview

Pet Service Management System in active development. Phase 1 (Utility Infrastructure) complete. Database migration and service module updates next.

<Note>
  **Current Sprint Focus:** Multi-Language JSONB Migration (Phase 1 Complete), Database Schema & Migration Implementation (Phase 2 - Starting)
</Note>

***

## Project Phases

### Phase 1: Foundation & Core Services

**Status:** 50% COMPLETE | **Target:** Q1 2026

<Steps>
  <Step title="Completed (2026-01-12)">
    * ✅ Backend infrastructure (Fastify, Prisma, PostgreSQL)
    * ✅ Authentication system (JWT, role-based access)
    * ✅ User management (User/Staff models)
    * ✅ Service CRUD operations
    * ✅ Booking model & operations
    * ✅ **Multi-Language Utility Infrastructure**
      * i18n translation utilities
      * Language detection interceptor
      * Language parameter decorator
      * TypeScript compilation: ✅ PASS
  </Step>

  <Step title="In Progress">
    * 🔄 Database migration to JSONB (Phase 2)
    * 🔄 Service module localization
    * 🔄 Staff module localization
    * 🔄 Settings module localization
    * 🔄 Global interceptor registration
  </Step>

  <Step title="Pending">
    * ⏳ API testing & validation
    * ⏳ Documentation updates
    * ⏳ Frontend integration testing
  </Step>
</Steps>

***

### Phase 2: Multi-Language & Internationalization

**Status:** 15% COMPLETE | **Target:** Q1 2026 (2026-01-12 - 2026-02-01)

#### Milestone 1: Utility Infrastructure ✅ DONE

**Completion:** 2026-01-12

* ✅ i18n.util.ts - Translation utilities
* ✅ language.interceptor.ts - Language detection
* ✅ language.decorator.ts - Parameter injection
* **Code Quality:** 0 critical issues
* **Verification:** TypeScript compilation passed

#### Milestone 2: Database Migration \[NEXT - HIGH PRIORITY]

**Target:** 2026-01-15

<AccordionGroup>
  <Accordion title="Migration Tasks">
    * [ ] Update Prisma schema (Service, Staff, Setting models)
    * [ ] Create migration SQL with data preservation
    * [ ] Test migration locally
    * [ ] Update seed.ts with JSONB data
    * [ ] Run database migration
    * [ ] Verify JSONB structure in Prisma Studio
  </Accordion>

  <Accordion title="Deliverables">
    * Updated `/backend/prisma/schema.prisma`
    * Migration file with 7-step process
    * Safe rollback plan
  </Accordion>
</AccordionGroup>

#### Milestone 3-5: Module Localization

**Target:** 2026-01-18 - 2026-01-20

* **Service Module** (2026-01-18)
* **Staff Module** (2026-01-18)
* **Settings Module** (2026-01-18)
* **Global Setup & Testing** (2026-01-20)

**Phase 2 Completion:** 2026-02-01

***

### Phase 3: Mobile App Development

**Status:** 0% COMPLETE | **Target:** Q2 2026 (2026-02-01 - 2026-03-31)

**Planned Features:**

* Flutter mobile app for iOS/Android
* Booking management interface
* Staff scheduling
* Real-time notifications
* Offline support

***

### Phase 4: Advanced Features

**Status:** 0% COMPLETE | **Target:** Q2/Q3 2026

**Planned Features:**

* Analytics dashboard
* Payment integration
* SMS/Email notifications
* Advanced reporting
* Inventory management

***

## Features Status

| Feature                | Status         | % Complete | Notes                                   |
| ---------------------- | -------------- | ---------- | --------------------------------------- |
| User Authentication    | ✅ Complete     | 100%       | JWT-based with role access              |
| Service Management     | 🔄 In Progress | 70%        | CRUD done, localization in progress     |
| Booking Management     | 🔄 In Progress | 60%        | Core done, language support needed      |
| Staff Management       | 🔄 In Progress | 60%        | Basic setup, localization pending       |
| Settings Management    | 🔄 In Progress | 50%        | Structure in place                      |
| Multi-Language Support | 🔄 In Progress | 30%        | Phase 1 done, Phase 2 starting          |
| Database Schema        | 🔄 In Progress | 80%        | Schema defined, JSONB migration pending |
| Error Handling         | ✅ Complete     | 100%       | Global error handling                   |
| Input Validation       | ✅ Complete     | 100%       | DTO-based validation                    |
| Logging                | ✅ Complete     | 100%       | Structured logging                      |

***

## Supported Languages

**Total Languages:** 14

<Tabs>
  <Tab title="Fully Configured">
    * English (en) - Full support
    * Vietnamese (vi) - Full support
  </Tab>

  <Tab title="Structure Ready">
    Japanese (ja), Chinese (zh), Korean (ko), Thai (th), Indonesian (id), French (fr), German (de), Spanish (es), Lao (lo), Khmer (km), Burmese (my), Filipino (fil)
  </Tab>
</Tabs>

**Language Detection Priority:**

1. Query parameter: `?lang=vi`
2. Accept-Language header
3. Cookie: `language=`
4. Default: `en`

***

## Success Metrics & KPIs

### Phase 1 Metrics

* ✅ All core APIs functional
* ✅ TypeScript compilation without errors
* ✅ Database schema properly defined
* ⏳ All endpoints return correct data types
* ⏳ Response times \< 100ms for list operations

### Phase 2 Metrics (Multi-Language)

* ⏳ Language detection working for all methods
* ⏳ JSONB migration completed without data loss
* ⏳ All existing data properly migrated
* ⏳ API responses correctly localized
* ⏳ Database constraints enforcing English translations
* ⏳ GIN indexes created and performant (\< 50ms queries)

***

## Dependencies & Risks

### Critical Path Items

<Warning>
  **Phase 2 Database Migration** - CRITICAL

  * Must complete by 2026-01-20
  * Risk: Database data integrity
  * Mitigation: Backup before migration, test locally, rollback plan available
</Warning>

### High Priority Risks

<AccordionGroup>
  <Accordion title="Risk 1: Database Migration Failure">
    **Impact:** High - Data loss, service downtime
    **Probability:** Low (with proper testing)
    **Mitigation:** Backup before migration, test locally, rollback plan
    **Status:** Monitoring
  </Accordion>

  <Accordion title="Risk 2: Language Detection Issues">
    **Impact:** Medium - Incorrect localization
    **Probability:** Low (well-defined spec)
    **Mitigation:** Comprehensive API testing
    **Status:** Preventive measures in place
  </Accordion>

  <Accordion title="Risk 3: Performance Degradation with JSONB">
    **Impact:** Medium - Slow API responses
    **Probability:** Low (with GIN indexes)
    **Mitigation:** GIN indexes, expression indexes, query optimization
    **Status:** Monitoring
  </Accordion>
</AccordionGroup>

***

## Next Steps (Priority Order)

### IMMEDIATE (This Week)

1. **\[HIGH] Complete Phase 2 Milestone 1: Database Migration**
   * Update schema.prisma with JSONB fields
   * Create and test migration SQL
   * Target: 2026-01-15

2. **\[HIGH] Run Database Migration**
   * Backup production database
   * Execute migration
   * Verify JSONB structure
   * Target: 2026-01-15

### NEAR-TERM (Next 2 Weeks)

3. **\[HIGH] Implement Module Localization**
   * Service module (controllers + services)
   * Staff module (controllers + services)
   * Settings module (controllers + services)
   * Target: 2026-01-20

4. **\[HIGH] Register Global Interceptor**
   * Update app.module.ts
   * Test language detection
   * Target: 2026-01-20

5. **\[MEDIUM] Complete API Testing**
   * Test all endpoints with different languages
   * Verify response formatting
   * Target: 2026-01-25

### SHORT-TERM (This Month)

6. **\[MEDIUM] Documentation Updates**
   * API documentation with language examples
   * Database schema documentation
   * Target: 2026-02-01

7. **\[MEDIUM] Performance Optimization**
   * Query optimization
   * Load testing
   * Target: 2026-02-01

### FUTURE (Next Quarter)

8. **Phase 3:** Mobile App Development
9. **Phase 4:** Advanced Features (Analytics, Payments)

***

## Deployment Status

<Tabs>
  <Tab title="Development">
    **Status:** Active
    **Database:** Local PostgreSQL
    **Testing:** Continuous
  </Tab>

  <Tab title="Staging">
    **Status:** Ready
    **Database:** Railway PostgreSQL staging
    **Testing:** Manual before production
  </Tab>

  <Tab title="Production">
    **Status:** Not deployed yet
    **Database:** Railway PostgreSQL production
    **Expected:** After Phase 2 completion (Feb 2026)
  </Tab>
</Tabs>

***

<CardGroup cols={2}>
  <Card title="i18n Implementation" icon="language" href="/i18n-implementation">
    Multi-language details
  </Card>

  <Card title="Architecture" icon="diagram-project" href="/architecture">
    System design
  </Card>

  <Card title="Installation" icon="download" href="/installation">
    Setup guide
  </Card>

  <Card title="Back to Home" icon="home" href="/">
    Return to homepage
  </Card>
</CardGroup>