test_date_practical.pie

import date;
import json;

int main() {
    output("=== Practical Date Module Examples ===\n\n", string);
    
    // Example 1: Working with JSON API responses that include timestamps
    output("Example 1: Parsing JSON with dates\n", string);
    output("--------------------------------------\n", string);
    
    string jsonResponse = "{\"created_at\":\"2025-11-05T10:30:00\",\"updated_at\":\"2025-11-05T14:30:00\",\"user\":\"John\"}";
    
    ptr apiData = json.parse(jsonResponse);
    string createdStr = json.get_string(apiData, "created_at");
    string updatedStr = json.get_string(apiData, "updated_at");
    string user = json.get_string(apiData, "user");
    
    output("JSON Response: ", string);
    output(jsonResponse, string);
    output("\n\n", string);
    
    // Parse the ISO timestamps
    int createdAt = date.parse_iso(createdStr);
    int updatedAt = date.parse_iso(updatedStr);
    
    output("Created at: ", string);
    output(date.format(createdAt, "%A, %B %d at %I:%M %p"), string);
    output("\n", string);
    
    output("Updated at: ", string);
    output(date.format(updatedAt, "%A, %B %d at %I:%M %p"), string);
    output("\n", string);
    
    // Calculate time difference
    int diffHours = date.diff_hours(updatedAt, createdAt);
    output("Hours between creation and update: ", string);
    output(diffHours, int);
    output(" hours\n", string);
    
    // Example 2: Event scheduling and countdown
    output("\n\nExample 2: Event scheduling\n", string);
    output("--------------------------------------\n", string);
    
    int now = date.now();
    
    // Schedule an event for next Friday at 7 PM
    int nextFriday = date.add_days(now, 2);  // Simulating 2 days from now
    int eventTime = date.start_of_day(nextFriday);
    eventTime = date.add_hours(eventTime, 19);  // 7 PM
    
    output("Current date: ", string);
    output(date.format_iso(now), string);
    output("\n", string);
    
    output("Event scheduled for: ", string);
    output(date.format(eventTime, "%A, %B %d at %I:%M %p"), string);
    output("\n", string);
    
    int daysUntil = date.diff_days(eventTime, now);
    int hoursUntil = date.diff_hours(eventTime, now);
    
    output("Time until event: ", string);
    output(daysUntil, int);
    output(" days (", string);
    output(hoursUntil, int);
    output(" hours)\n", string);
    
    // Example 3: Working with month boundaries for billing
    output("\n\nExample 3: Monthly billing period\n", string);
    output("--------------------------------------\n", string);
    
    int billingStart = date.start_of_month(now);
    int billingEnd = date.end_of_month(now);
    
    output("Billing period: ", string);
    output(date.format_date(billingStart), string);
    output(" to ", string);
    output(date.format_date(billingEnd), string);
    output("\n", string);
    
    int billingDays = date.days_in_month(now);
    output("Days in billing period: ", string);
    output(billingDays, int);
    output("\n", string);
    
    int daysElapsed = date.diff_days(now, billingStart);
    int daysRemaining = date.diff_days(billingEnd, now);
    
    output("Days elapsed: ", string);
    output(daysElapsed, int);
    output("\n", string);
    
    output("Days remaining: ", string);
    output(daysRemaining, int);
    output("\n", string);
    
    // Example 4: Date validation and formatting
    output("\n\nExample 4: Date formatting for logs\n", string);
    output("--------------------------------------\n", string);
    
    // Create a log entry with timestamp
    output("[", string);
    output(date.format(now, "%Y-%m-%d %H:%M:%S"), string);
    output("] INFO: System started\n", string);
    
    int logTime2 = date.add_minutes(now, 5);
    output("[", string);
    output(date.format(logTime2, "%Y-%m-%d %H:%M:%S"), string);
    output("] INFO: User logged in\n", string);
    
    int logTime3 = date.add_minutes(now, 10);
    output("[", string);
    output(date.format(logTime3, "%Y-%m-%d %H:%M:%S"), string);
    output("] INFO: Request processed\n", string);
    
    // Example 5: Age calculation
    output("\n\nExample 5: Age calculation\n", string);
    output("--------------------------------------\n", string);
    
    int birthdate = date.parse("1990-05-15", "%Y-%m-%d");
    int ageInDays = date.diff_days(now, birthdate);
    // Approximate age in years (365 days per year)
    float ageFloat = int_to_float(ageInDays);
    float divisor = 365.0;
    float ageYearsFloat = ageFloat / divisor;
    int ageInYears = float_to_int(ageYearsFloat);
    
    output("Birthdate: ", string);
    output(date.format_date(birthdate), string);
    output("\n", string);
    
    output("Age: approximately ", string);
    output(ageInYears, int);
    output(" years (", string);
    output(ageInDays, int);
    output(" days)\n", string);
    
    // Example 6: Week planning
    output("\n\nExample 6: Week overview\n", string);
    output("--------------------------------------\n", string);
    
    output("This week:\n", string);
    int dayCounter = 0;
    while (dayCounter < 7) {
        int currentDay = date.add_days(now, dayCounter);
        output("  ", string);
        output(date.get_weekday_name(currentDay), string);
        output(", ", string);
        output(date.format_date(currentDay), string);
        output("\n", string);
        dayCounter = dayCounter + 1;
    }
    
    output("\n=== Examples Complete ===\n", string);
    
    return 0;
}