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CRUNCHYROLL DOWNLOADER - CHALLENGE 3 SOLUTION
Chapter 5: Complete Workflow
Challenge: Complete Script
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PROBLEM:
Build main() that orchestrates entire workflow with error handling.

SOLUTION:
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File: download.py (complete with all steps)

import sys
from config import Config
from crunchyroll_utils import login, load_cached_token, save_token, CrunchyrollClient, parse_episodes
import csv

def export_to_csv(episodes, filename="episodes.csv"):
    with open(filename, 'w', newline='', encoding='utf-8') as f:
        writer = csv.DictWriter(f, fieldnames=[
            'show_name', 'episode_number', 'episode_name', 'date_watched'
        ])
        writer.writeheader()
        writer.writerows(episodes)
    print(f"✅ Exported {len(episodes)} episodes to {filename}")

def main():
    print("\n" + "=" * 70)
    print("🚀 CRUNCHYROLL EPISODE DOWNLOADER")
    print("=" * 70 + "\n")

    # STEP 1: Load config
    print("STEP 1: Loading configuration...")
    config = Config()
    if not config.validate():
        return False

    # STEP 2: Get JWT token
    print("\nSTEP 2: Getting JWT token...")
    token = load_cached_token(config.token_cache)

    if not token:
        print("  Logging in...")
        token = login(config)
        if not token:
            return False
        save_token(token, config.token_cache)

    # STEP 3: Fetch episodes
    print("\nSTEP 3: Fetching episodes...")
    client = CrunchyrollClient(config, token)
    episodes = client.get_episodes()

    if not episodes:
        print("❌ No episodes found")
        return False

    # STEP 4: Parse data
    print("\nSTEP 4: Parsing episode data...")
    parsed = parse_episodes(episodes)

    # STEP 5: Export to CSV
    print("\nSTEP 5: Exporting to CSV...")
    export_to_csv(parsed, "episodes.csv")

    # Summary
    print("\n" + "=" * 70)
    print("✅ COMPLETE!")
    print("=" * 70)
    print(f"Downloaded: {len(parsed)} episodes")
    print(f"Saved to: episodes.csv")

    return True

if __name__ == "__main__":
    success = main()
    sys.exit(0 if success else 1)


EXPECTED OUTPUT
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======================================================================
🚀 CRUNCHYROLL EPISODE DOWNLOADER
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STEP 1: Loading configuration...
✅ Configuration is valid!

STEP 2: Getting JWT token...
✅ Using cached token

STEP 3: Fetching episodes...
📡 Fetching episodes...
✅ Fetched 147 episodes

STEP 4: Parsing episode data...

STEP 5: Exporting to CSV...
💾 Exporting to episodes.csv...
✅ Exported 147 episodes to episodes.csv

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✅ COMPLETE!
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Downloaded: 147 episodes
Saved to: episodes.csv

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