Perfect! Now let me create a comprehensive report based on my findings. I have all the information needed to provide a complete analysis.

## Comprehensive WhatsAppAnalyzer Message Handling Analysis

Based on my exploration of the WhatsAppAnalyzer-macOS codebase, here's a detailed breakdown of how the app handles sending messages:

### 1. Current Reply Mechanism in DeepAnalysisView.swift

**Location:** `/Users/neog/Apps/macOS/WhatsAppAnalyzer-macOS/Sources/Views/DeepAnalysisView.swift` (Lines 108-117)

```swift
private func sendReply(_ text: String) {
    // Open WhatsApp with the message
    // Format: whatsapp://send?phone=NUMBER&text=MESSAGE
    let phone = chat.contactJID.replacingOccurrences(of: "@lid", with: "")
    if let encoded = text.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed),
       let url = URL(string: "whatsapp://send?phone=\(phone)&text=\(encoded)") {
        NSWorkspace.shared.open(url)
    }
    showingReplySheet = false
}
```

**Key points:**
- Uses the **WhatsApp URL scheme** `whatsapp://send`
- Extracts phone number from `contactJID` by removing the `@lid` suffix
- URL encodes the message text for proper transmission
- Opens WhatsApp using `NSWorkspace.shared.open(url)`
- Does NOT actually send the message programmatically—it only opens WhatsApp with pre-filled text

### 2. ReplySheetView Component

**Location:** `/Users/neog/Apps/macOS/WhatsAppAnalyzer-macOS/Sources/Views/DeepAnalysisView.swift` (Lines 532-568)

```swift
struct ReplySheetView: View {
    let chat: ChatSession
    @Binding var replyText: String
    let onSend: (String) -> Void

    @Environment(\.dismiss) private var dismiss

    var body: some View {
        VStack(spacing: 20) {
            Text("Responder para \(chat.displayName)")
                .font(.headline)

            TextEditor(text: $replyText)
                .frame(height: 100)
                .padding(8)
                .background(Color(nsColor: .controlBackgroundColor))
                .cornerRadius(8)

            HStack {
                Button("Cancelar") {
                    dismiss()
                }
                .keyboardShortcut(.escape)

                Spacer()

                Button("Abrir no WhatsApp") {
                    onSend(replyText)
                }
                .buttonStyle(.borderedProminent)
                .keyboardShortcut(.return)
            }
        }
        .padding()
        .frame(width: 400)
    }
}
```

**Features:**
- Simple modal sheet for composing replies
- TextEditor for multi-line message input (100pt height)
- Keyboard shortcuts: Escape to cancel, Return to send
- Button text says "Abrir no WhatsApp" (Open in WhatsApp)—explicitly indicating it opens the app rather than sending directly

### 3. WhatsApp Database Table Structure (ZWAMESSAGE)

**Location:** `/Users/neog/Apps/macOS/WhatsAppAnalyzer-macOS/Sources/Services/WhatsAppDatabase.swift` (Lines 86-153)

The app queries the WhatsApp SQLite database using these columns from ZWAMESSAGE table:

```
SELECT
    m.Z_PK                  // Message ID (primary key)
    m.ZTEXT                 // Message text content
    m.ZISFROMME             // Boolean: is message from current user
    m.ZMESSAGEDATE          // Unix timestamp of message
    m.ZPUSHNAME             // Sender's push name
    m.ZMESSAGETYPE          // Message type (0=text, 2=audio, etc.)
    m.ZMEDIALOCALPATH       // Media file path (for audio/video)
    mi.ZMOVIEDURATION       // Media duration in seconds
FROM ZWAMESSAGE m
LEFT JOIN ZWAMEDIAITEM mi ON mi.ZMESSAGE = m.Z_PK
```

**Related table:** ZWACHATSESSION contains:
- `Z_PK`: Chat ID
- `ZCONTACTJID`: Contact JID (e.g., "1234567890@lid")
- `ZPARTNERNAME`: Contact name
- `ZMESSAGECOUNTER`: Total messages
- `ZLASTMESSAGEDATE`: Last message timestamp

### 4. Database Writing Capabilities

**Critical Finding:** The app opens the WhatsApp database in **READ-ONLY mode**.

```swift
// Line 30 in WhatsAppDatabase.swift
if sqlite3_open_v2(dbPath, &db, SQLITE_OPEN_READONLY, nil) == SQLITE_OK {
```

**Implications:**
- The app **CANNOT write to the WhatsApp database**
- No INSERT, UPDATE, or DELETE operations are performed
- Messages cannot be directly saved to the WhatsApp database from this app
- The app is purely a read-only analyzer

### 5. WhatsApp URL Scheme Being Used

**URL Format:** `whatsapp://send?phone=<PHONE>&text=<MESSAGE>`

**Example:**
```
whatsapp://send?phone=5511987654321&text=Hello%20World
```

**Implementation Details:**
- Phone number must be extracted without the `@lid` suffix (JID identifier)
- Message text must be URL-encoded using `.urlQueryAllowed` character set
- Opens the WhatsApp macOS app (not web) with the message pre-filled in the compose field
- User must manually confirm and send from WhatsApp

### 6. Other Message Input Components Found

The app has **two nearly identical reply mechanisms** in different views:

#### a) **DeepAnalysisView** (lines 70-76, 532-568)
- Triggered by AI-generated response suggestions
- Component: `ReplySheetView`
- Used in lines 71-75 of DeepAnalysisView

#### b) **AIAnalysisView** (lines 47-53, 181-233)
- Triggered by quick analysis results
- Component: `QuickReplySheet`
- Very similar structure with slightly different styling
- Green theme for quick replies vs. default theme for deep analysis

```swift
// AIAnalysisView.swift - Line 181-233
struct QuickReplySheet: View {
    let chat: ChatSession
    @Binding var replyText: String
    let onSend: (String) -> Void

    @Environment(\.dismiss) private var dismiss

    var body: some View {
        VStack(spacing: 20) {
            HStack {
                Image(systemName: "paperplane.circle.fill")
                    .font(.title)
                    .foregroundColor(.green)
                Text("Responder para \(chat.displayName)")
                    .font(.headline)
            }

            TextEditor(text: $replyText)
                .frame(height: 120)
                // ... styling ...

            Text("Isso abrirá o WhatsApp com a mensagem preenchida")
                .font(.caption)
                .foregroundColor(.secondary)
            // ... buttons ...
        }
    }
}
```

Both components use the **identical `sendReply` function** (lines 56-63 in AIAnalysisView match the pattern in DeepAnalysisView 108-117).

### Summary Table

| Aspect | Details |
|--------|---------|
| **Database Access** | Read-only via SQLite3 |
| **Message Database** | WhatsApp's ChatStorage.sqlite at `~/Library/Group Containers/group.net.whatsapp.WhatsApp.shared/` |
| **Write Capability** | None—database opened with SQLITE_OPEN_READONLY |
| **Message Sending** | Via WhatsApp URL scheme only (opens app, pre-fills message) |
| **URL Scheme** | `whatsapp://send?phone=<NUMBER>&text=<ENCODED_TEXT>` |
| **Reply UI Components** | 2 sheets: ReplySheetView (deep analysis) + QuickReplySheet (quick analysis) |
| **Keyboard Shortcuts** | Escape=Cancel, Return=Send |
| **Message Input Type** | TextEditor (multi-line, 100-120pt height) |
| **Phone Number Source** | ContactJID with "@lid" suffix removed |

### Important Limitation

**The app cannot directly send messages.** It only opens WhatsApp with a pre-composed message. The user must:
1. Confirm the message in WhatsApp
2. Click send manually

This is by design—WhatsApp doesn't provide programmatic access to send messages via URL scheme on macOS; the URL scheme only pre-fills the compose field.