namespace PowderCoating.Application.DTOs.AI;

// ── Shared ────────────────────────────────────────────────────────────────────

/// <summary>Lightweight account summary passed to AI for account matching.</summary>
public class AccountSummary
{
    public int Id { get; set; }
    public string AccountNumber { get; set; } = string.Empty;
    public string Name { get; set; } = string.Empty;
    public string AccountType { get; set; } = string.Empty;   // "Expense", "CostOfGoods", "Asset"
    public string? AccountSubType { get; set; }
}

// ── Feature 1: Receipt / Bill Scanning ───────────────────────────────────────

public class ScannedLineItem
{
    public string Description { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public int? SuggestedAccountId { get; set; }
    public string? SuggestedAccountName { get; set; }
}

public class ReceiptScanResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }

    public string? VendorName { get; set; }
    public string? Date { get; set; }           // ISO 8601 date string
    public decimal? Total { get; set; }
    public string? InvoiceNumber { get; set; }
    public List<ScannedLineItem> LineItems { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for receipt scans.</summary>
public class ClaudeReceiptResponse
{
    public string? VendorName { get; set; }
    public string? Date { get; set; }
    public decimal? Total { get; set; }
    public string? InvoiceNumber { get; set; }
    public List<ClaudeReceiptLineItem> LineItems { get; set; } = new();
}

public class ClaudeReceiptLineItem
{
    public string Description { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public int? SuggestedAccountId { get; set; }
    public string? SuggestedAccountName { get; set; }
}

// ── Feature 2: AR Follow-up Email Drafts ─────────────────────────────────────

public class OverdueInvoice
{
    public string InvoiceNumber { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public int DaysOverdue { get; set; }
}

public class ArFollowUpRequest
{
    public string CustomerName { get; set; } = string.Empty;
    public string CompanyName { get; set; } = string.Empty;
    public decimal AmountOwed { get; set; }
    public int DaysOverdue { get; set; }
    public List<OverdueInvoice> Invoices { get; set; } = new();
}

public class ArFollowUpResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }

    public string Subject { get; set; } = string.Empty;
    public string Body { get; set; } = string.Empty;
}

/// <summary>Internal JSON schema that Claude returns for AR email drafts.</summary>
public class ClaudeArEmailResponse
{
    public string Subject { get; set; } = string.Empty;
    public string Body { get; set; } = string.Empty;
}

// ── Feature 3: Smart Account Categorization ──────────────────────────────────

public class AccountSuggestionRequest
{
    public string? VendorName { get; set; }
    public string? Description { get; set; }
    public decimal Amount { get; set; }
    public List<AccountSummary> AvailableAccounts { get; set; } = new();
}

public class AccountSuggestion
{
    public int AccountId { get; set; }
    public string AccountName { get; set; } = string.Empty;
    public double Confidence { get; set; }
    public string? Reasoning { get; set; }
}

public class AccountSuggestionResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }

    public int? SuggestedAccountId { get; set; }
    public string? SuggestedAccountName { get; set; }
    public string? Reasoning { get; set; }
    public List<AccountSuggestion> Alternatives { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for account suggestions.</summary>
public class ClaudeAccountSuggestionResponse
{
    public int? SuggestedAccountId { get; set; }
    public string? SuggestedAccountName { get; set; }
    public string? Reasoning { get; set; }
    public List<ClaudeAccountAlternative> Alternatives { get; set; } = new();
}

public class ClaudeAccountAlternative
{
    public int AccountId { get; set; }
    public string AccountName { get; set; } = string.Empty;
    public double Confidence { get; set; }
    public string? Reasoning { get; set; }
}

// ── Feature 4: Plain-English Financial Summary ────────────────────────────────

public class ExpenseByCategory
{
    public string Category { get; set; } = string.Empty;
    public decimal Amount { get; set; }
}

public class FinancialSummaryRequest
{
    public string CompanyName { get; set; } = string.Empty;
    public string Period { get; set; } = string.Empty;          // e.g. "Last 6 months"
    public decimal TotalRevenue { get; set; }
    public decimal TotalExpenses { get; set; }
    public decimal NetIncome { get; set; }
    public decimal PriorMonthRevenue { get; set; }
    public decimal PriorMonthExpenses { get; set; }
    public decimal TotalArOutstanding { get; set; }
    public decimal ArOverdue30Days { get; set; }
    public int OverdueInvoiceCount { get; set; }
    public List<ExpenseByCategory> ExpensesByCategory { get; set; } = new();
}

public class FinancialSummaryResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }

    /// <summary>Markdown bullet lines (plain English, no jargon).</summary>
    public List<string> Bullets { get; set; } = new();

    /// <summary>"positive", "neutral", or "concerning".</summary>
    public string Sentiment { get; set; } = "neutral";
}

/// <summary>Internal JSON schema that Claude returns for financial summaries.</summary>
public class ClaudeFinancialSummaryResponse
{
    public List<string> Bullets { get; set; } = new();
    public string Sentiment { get; set; } = "neutral";
}

// ── Feature 5: Cash Flow Forecast ─────────────────────────────────────────────

public class CashFlowArItem
{
    public string CustomerName { get; set; } = string.Empty;
    public string InvoiceNumber { get; set; } = string.Empty;
    public decimal BalanceDue { get; set; }
    public string? DueDateIso { get; set; }
    public int DaysOverdue { get; set; }
    public int AvgDaysToPay { get; set; }
}

public class CashFlowApItem
{
    public string VendorName { get; set; } = string.Empty;
    public string BillNumber { get; set; } = string.Empty;
    public decimal BalanceDue { get; set; }
    public string? DueDateIso { get; set; }
}

public class CashFlowJobItem
{
    public string JobNumber { get; set; } = string.Empty;
    public string CustomerName { get; set; } = string.Empty;
    public string Status { get; set; } = string.Empty;
    public decimal EstimatedValue { get; set; }
}

public class CashFlowForecastRequest
{
    public string CompanyName { get; set; } = string.Empty;
    public string AsOfDate { get; set; } = string.Empty;
    public List<CashFlowArItem> OpenInvoices { get; set; } = new();
    public List<CashFlowApItem> OpenBills { get; set; } = new();
    public List<CashFlowJobItem> ActiveJobs { get; set; } = new();
}

public class CashFlowPeriod
{
    public decimal ExpectedInflows { get; set; }
    public decimal ExpectedOutflows { get; set; }
    public decimal NetCashFlow { get; set; }
    public List<string> KeyItems { get; set; } = new();
}

public class CashFlowForecastResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public CashFlowPeriod Next30Days { get; set; } = new();
    public CashFlowPeriod Next60Days { get; set; } = new();
    public CashFlowPeriod Next90Days { get; set; } = new();
    public List<string> Insights { get; set; } = new();
    /// <summary>"strong", "moderate", "tight", or "concerning"</summary>
    public string Outlook { get; set; } = "moderate";
}

/// <summary>Internal JSON schema that Claude returns for cash flow forecasts.</summary>
public class ClaudeCashFlowResponse
{
    public ClaudeCashFlowPeriod Next30Days { get; set; } = new();
    public ClaudeCashFlowPeriod Next60Days { get; set; } = new();
    public ClaudeCashFlowPeriod Next90Days { get; set; } = new();
    public List<string> Insights { get; set; } = new();
    public string Outlook { get; set; } = "moderate";
}

public class ClaudeCashFlowPeriod
{
    public decimal ExpectedInflows { get; set; }
    public decimal ExpectedOutflows { get; set; }
    public decimal NetCashFlow { get; set; }
    public List<string> KeyItems { get; set; } = new();
}

// ── Feature 6: Anomaly / Duplicate Detection ──────────────────────────────────

public class AnomalyBillSummary
{
    public int Id { get; set; }
    public string BillNumber { get; set; } = string.Empty;
    public string VendorName { get; set; } = string.Empty;
    public decimal Total { get; set; }
    public string BillDateIso { get; set; } = string.Empty;
    public string? VendorInvoiceNumber { get; set; }
}

public class AnomalyVendorHistory
{
    public string VendorName { get; set; } = string.Empty;
    public decimal AverageInvoiceAmount { get; set; }
    public decimal AverageMonthlySpend { get; set; }
    public int InvoiceCount { get; set; }
}

public class AnomalyAccountTrend
{
    public string AccountName { get; set; } = string.Empty;
    public decimal ThisMonthAmount { get; set; }
    public decimal LastMonthAmount { get; set; }
    public decimal AverageMonthlyAmount { get; set; }
}

public class AnomalyDetectionRequest
{
    public string CompanyName { get; set; } = string.Empty;
    public List<AnomalyBillSummary> RecentBills { get; set; } = new();
    public List<AnomalyVendorHistory> VendorHistory { get; set; } = new();
    public List<AnomalyAccountTrend> AccountTrends { get; set; } = new();
}

public class AnomalyFlag
{
    /// <summary>"duplicate", "amount_spike", "unusual_vendor", "account_overrun"</summary>
    public string Type { get; set; } = string.Empty;
    /// <summary>"critical", "warning", "info"</summary>
    public string Severity { get; set; } = "warning";
    public string Title { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public string? RecommendedAction { get; set; }
    public string? BillNumber { get; set; }
}

public class AnomalyDetectionResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public List<AnomalyFlag> Flags { get; set; } = new();
    public int CriticalCount { get; set; }
    public int WarningCount { get; set; }
    public int InfoCount { get; set; }
}

/// <summary>Internal JSON schema that Claude returns for anomaly detection.</summary>
public class ClaudeAnomalyResponse
{
    public List<ClaudeAnomalyFlag> Flags { get; set; } = new();
}

public class ClaudeAnomalyFlag
{
    public string Type { get; set; } = string.Empty;
    public string Severity { get; set; } = "warning";
    public string Title { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public string? RecommendedAction { get; set; }
    public string? BillNumber { get; set; }
}

// ── Feature 7: Bank Rec Auto-Match ───────────────────────────────────────────

public class BankRecMatchItem
{
    public string EntityType { get; set; } = string.Empty;   // "Payment", "BillPayment", "Expense"
    public int EntityId { get; set; }
    public string Date { get; set; } = string.Empty;          // ISO 8601
    public string Reference { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public string Direction { get; set; } = string.Empty;     // "deposit" or "payment"
}

public class AutoMatchRequest
{
    public List<BankRecMatchItem> UnclearedItems { get; set; } = new();
    public decimal BeginningBalance { get; set; }
    public decimal StatementEndingBalance { get; set; }
}

public class AutoMatchSuggestion
{
    public string EntityType { get; set; } = string.Empty;
    public int EntityId { get; set; }
    public double Confidence { get; set; }   // 0.0–1.0
    public string Reason { get; set; } = string.Empty;
}

public class AutoMatchResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public List<AutoMatchSuggestion> SuggestedCleared { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for bank rec auto-match.</summary>
public class ClaudeAutoMatchResponse
{
    public List<ClaudeAutoMatchSuggestion> SuggestedCleared { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

public class ClaudeAutoMatchSuggestion
{
    public string EntityType { get; set; } = string.Empty;
    public int EntityId { get; set; }
    public double Confidence { get; set; }
    public string Reason { get; set; } = string.Empty;
}

// ── Feature 8: Late Payment Prediction ───────────────────────────────────────

public class OpenInvoiceSummary
{
    public string InvoiceNumber { get; set; } = string.Empty;
    public decimal BalanceDue { get; set; }
    public string? DueDateIso { get; set; }
    public int DaysOverdue { get; set; }
}

public class LatePaymentCustomerData
{
    public string CustomerName { get; set; } = string.Empty;
    public decimal TotalOwed { get; set; }
    public double AvgDaysToPay { get; set; }      // historical average
    public int TotalInvoicesAllTime { get; set; }
    public int LateInvoicesAllTime { get; set; }
    public List<OpenInvoiceSummary> OpenInvoices { get; set; } = new();
}

public class LatePaymentPredictionRequest
{
    public string CompanyName { get; set; } = string.Empty;
    public List<LatePaymentCustomerData> Customers { get; set; } = new();
}

public class LatePaymentPrediction
{
    public string CustomerName { get; set; } = string.Empty;
    /// <summary>"high", "medium", or "low"</summary>
    public string RiskLevel { get; set; } = "medium";
    public int EstimatedDaysToPayment { get; set; }
    public string Reasoning { get; set; } = string.Empty;
}

public class LatePaymentPredictionResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public List<LatePaymentPrediction> Predictions { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for late payment predictions.</summary>
public class ClaudeLatePaymentResponse
{
    public List<ClaudeLatePaymentPrediction> Predictions { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

public class ClaudeLatePaymentPrediction
{
    public string CustomerName { get; set; } = string.Empty;
    public string RiskLevel { get; set; } = "medium";
    public int EstimatedDaysToPayment { get; set; }
    public string Reasoning { get; set; } = string.Empty;
}

// ── Feature 9: Natural Language Financial Queries ─────────────────────────────

public class MonthlyFinancialSummary
{
    public string Month { get; set; } = string.Empty;   // "YYYY-MM"
    public decimal Revenue { get; set; }
    public decimal Expenses { get; set; }
    public decimal NetIncome { get; set; }
}

public class FinancialQueryContext
{
    public string CompanyName { get; set; } = string.Empty;
    public string AsOfDate { get; set; } = string.Empty;
    public decimal TotalRevenueYtd { get; set; }
    public decimal TotalExpensesYtd { get; set; }
    public decimal NetIncomeYtd { get; set; }
    public decimal ArOutstanding { get; set; }
    public decimal ApOutstanding { get; set; }
    public List<MonthlyFinancialSummary> Last12Months { get; set; } = new();
    public List<ExpenseByCategory> ExpensesByCategory { get; set; } = new();
}

public class FinancialQueryRequest
{
    public string Question { get; set; } = string.Empty;
    public FinancialQueryContext Context { get; set; } = new();
}

public class FinancialQueryResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public string Answer { get; set; } = string.Empty;
    public string? FollowUpSuggestion { get; set; }
    public List<string> RelevantFacts { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for financial queries.</summary>
public class ClaudeFinancialQueryResponse
{
    public string Answer { get; set; } = string.Empty;
    public string? FollowUpSuggestion { get; set; }
    public List<string> RelevantFacts { get; set; } = new();
}

// ── Feature 10: Recurring Bill Detection ─────────────────────────────────────

public class RecurringBillHistoryItem
{
    public string VendorName { get; set; } = string.Empty;
    public string BillNumber { get; set; } = string.Empty;
    public decimal Amount { get; set; }
    public string DateIso { get; set; } = string.Empty;
    public string? Memo { get; set; }
}

public class RecurringBillDetectionRequest
{
    public string CompanyName { get; set; } = string.Empty;
    public List<RecurringBillHistoryItem> Bills { get; set; } = new();
}

public class RecurringBillPattern
{
    public string VendorName { get; set; } = string.Empty;
    /// <summary>"monthly", "quarterly", "biannual", "annual"</summary>
    public string Frequency { get; set; } = string.Empty;
    public decimal TypicalAmount { get; set; }
    public string? NextExpectedDateIso { get; set; }
    /// <summary>"high", "medium", or "low"</summary>
    public string Confidence { get; set; } = "medium";
    public string Description { get; set; } = string.Empty;
    public string? SuggestedAction { get; set; }
}

public class RecurringBillDetectionResult
{
    public bool Success { get; set; }
    public string? ErrorMessage { get; set; }
    public List<RecurringBillPattern> Patterns { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

/// <summary>Internal JSON schema that Claude returns for recurring bill detection.</summary>
public class ClaudeRecurringBillResponse
{
    public List<ClaudeRecurringPattern> Patterns { get; set; } = new();
    public List<string> Insights { get; set; } = new();
}

public class ClaudeRecurringPattern
{
    public string VendorName { get; set; } = string.Empty;
    public string Frequency { get; set; } = string.Empty;
    public decimal TypicalAmount { get; set; }
    public string? NextExpectedDateIso { get; set; }
    public string Confidence { get; set; } = "medium";
    public string Description { get; set; } = string.Empty;
    public string? SuggestedAction { get; set; }
}