#!/usr/bin/env python3
"""
tests/test_connectors.py — Test suite for the personal archive connector pack.

Tests cover:
  - SourceEvent schema validation
  - Event hash determinism
  - TwitterArchiveConnector parsing of standard Twitter export format
  - Deduplication gate
"""

import json
import hashlib
import tempfile
from pathlib import Path
from datetime import datetime
import pytest

# Add scripts dir to path for sibling imports
import sys
SCRIPT_DIR = Path(__file__).parent.parent / "scripts"
sys.path.insert(0, str(SCRIPT_DIR.parent))

from connectors.schema import (
    SourceEvent,
    compute_event_hash,
    validate_event,
    CONSENT_MEMORY_ONLY,
    CONSENT_BOOTSTRAP,
)
from connectors.twitter_archive import TwitterArchiveConnector


class TestSourceEventSchema:
    """Tests for SourceEvent dataclass and helpers."""

    def test_create_minimal_event(self):
        event = SourceEvent(
            source="twitter",
            account="user123",
            thread_or_channel="tweet_456",
            author="user123",
            timestamp="2026-04-26T12:00:00Z",
            content="Hello world",
            attachments=[],
            raw_ref="twitter:test:456",
            hash="",
        )
        assert event.source == "twitter"
        assert event.consent_scope == CONSENT_MEMORY_ONLY  # default

    def test_compute_event_hash_deterministic(self):
        h1 = compute_event_hash(
            source="twitter",
            raw_ref="ref:123",
            content="test content",
            timestamp="2026-04-26T12:00:00Z",
            author="alice"
        )
        h2 = compute_event_hash(
            source="twitter",
            raw_ref="ref:123",
            content="test content",
            timestamp="2026-04-26T12:00:00Z",
            author="alice"
        )
        assert h1 == h2
        assert len(h1) == 64  # SHA-256 hex

    def test_compute_event_hash_different_inputs(self):
        h1 = compute_event_hash("twitter", "ref:1", "content", "ts", "alice")
        h2 = compute_event_hash("twitter", "ref:1", "different", "ts", "alice")
        assert h1 != h2

    def test_validate_event_accepts_valid(self):
        event = SourceEvent(
            source="discord",
            account="user#1234",
            thread_or_channel="channel_abc",
            author="user#1234",
            timestamp="2026-04-26T12:00:00Z",
            content="test",
            attachments=[],
            raw_ref="discord:msg:123",
            hash="a" * 64,
        )
        assert validate_event(event) is True

    def test_validate_event_rejects_empty_content(self):
        event = SourceEvent(
            source="twitter",
            account="user",
            thread_or_channel="thread",
            author="user",
            timestamp="2026-04-26T12:00:00Z",
            content="",  # empty
            attachments=[],
            raw_ref="ref",
            hash="a" * 64,
        )
        assert validate_event(event) is False

    def test_validate_event_rejects_missing_hash(self):
        event = SourceEvent(
            source="twitter",
            account="user",
            thread_or_channel="thread",
            author="user",
            timestamp="2026-04-26T12:00:00Z",
            content="test",
            attachments=[],
            raw_ref="ref",
            hash="   ",  # whitespace only
        )
        assert validate_event(event) is False

    def test_event_to_json_roundtrip(self):
        event = SourceEvent(
            source="twitter",
            account="user",
            thread_or_channel="t1",
            author="user",
            timestamp="2026-04-26T12:00:00Z",
            content="hello",
            attachments=["https://example.com/img.jpg"],
            raw_ref="twitter:123",
            hash="b" * 64,
            metadata={"retweet_count": 5}
        )
        json_str = event.to_json()
        parsed = json.loads(json_str)
        assert parsed["source"] == "twitter"
        assert parsed["metadata"]["retweet_count"] == 5


class TestTwitterArchiveConnector:
    """Tests for the Twitter/X archive connector."""

    def test_connector_name(self):
        assert TwitterArchiveConnector.name == "twitter_archive"

    def test_discover_sources_finds_tweet_js(self, tmp_path: Path):
        # Arrange: create a fake Twitter archive structure
        archive = tmp_path / "twitter_archive"
        archive.mkdir()
        data_dir = archive / "data"
        data_dir.mkdir()
        (data_dir / "tweet.js").write_text("[]")
        (data_dir / "tweets_2024_01.js").write_text("[]")

        connector = TwitterArchiveConnector()
        sources = list(connector.discover_sources(archive))

        assert len(sources) == 2
        assert any("tweet.js" in str(p) for p in sources)

    def test_parse_single_tweet_wrapped_format(self, tmp_path: Path):
        """
        Twitter's official export wraps the JSON array in a JS assignment:
          window.YTD.tweet.part0 = [ {...tweet...}, ... ];
        """
        # Create a minimal tweet record
        tweet = {
            "id_str": "1234567890",
            "full_text": "Hello from Twitter archive!",
            "created_at": "Mon Apr 26 08:30:00 +0000 2026",
            "favorite_count": 10,
            "retweet_count": 2,
            "lang": "en"
        }
        wrapped = "window.YTD.tweet.part0 = " + json.dumps([{'tweet': tweet}]) + ";\n"

        js_file = tmp_path / "tweet.js"
        js_file.write_text(wrapped)

        connector = TwitterArchiveConnector()
        events = list(connector.parse_source(js_file))

        assert len(events) == 1
        ev = events[0]
        assert ev.source == "twitter"
        assert ev.content == "Hello from Twitter archive!"
        assert ev.author == "user_archive"
        assert ev.consent_scope == "memory_only"
        # Hash must be computed
        assert len(ev.hash) == 64
        # Metadata preservation
        assert ev.metadata["tweet_id"] == "1234567890"
        assert ev.metadata["favorite_count"] == 10

    def test_parse_tweet_array_without_wrapper(self, tmp_path: Path):
        """Some Twitter exports are plain JSON arrays (no JS wrapper)."""
        tweet = {
            "id_str": "999",
            "full_text": "Plain JSON tweet",
            "created_at": "Mon Apr 26 08:30:00 +0000 2026",
        }
        json_file = tmp_path / "tweets.json"
        json_file.write_text(json.dumps([{"tweet": tweet}]))

        connector = TwitterArchiveConnector()
        events = list(connector.parse_source(json_file))

        assert len(events) == 1
        assert events[0].content == "Plain JSON tweet"

    def test_parse_with_media_attachments(self, tmp_path: Path):
        tweet = {
            "id_str": "111",
            "full_text": "Check this photo",
            "created_at": "Mon Apr 26 08:30:00 +0000 2026",
            "extended_entities": {
                "media": [
                    {"media_url_https": "https://pbs.twimg.com/media/example1.jpg"},
                    {"media_url_https": "https://pbs.twimg.com/media/example2.jpg"},
                ]
            }
        }
        js_file = tmp_path / "tweet.js"
        js_file.write_text("window.YTD.tweet.part0 = " + json.dumps([{'tweet': tweet}]) + ";\n")

        connector = TwitterArchiveConnector()
        events = list(connector.parse_source(js_file))

        assert len(events) == 1
        atts = events[0].attachments
        assert len(atts) == 2
        assert "example1.jpg" in atts[0]

    def test_integration_run_connector(self, tmp_path: Path):
        """End-to-end: create a mini archive, run connector, write JSONL output."""
        # Arrange: create archive with two tweets
        archive_root = tmp_path / "my_twitter_archive" / "data"
        archive_root.mkdir(parents=True)

        tweet1 = {
            "id_str": "1",
            "full_text": "First tweet",
            "created_at": "Mon Apr 26 08:00:00 +0000 2026",
        }
        tweet2 = {
            "id_str": "2",
            "full_text": "Second tweet",
            "created_at": "Mon Apr 26 09:00:00 +0000 2026",
        }
        (archive_root / "tweet.js").write_text(
            "window.YTD.tweet.part0 = " + json.dumps([{'tweet': tweet1}, {'tweet': tweet2}]) + "\n"
        )

        connector = TwitterArchiveConnector(checkpoint_path=tmp_path / "ckpt.jsonl")
        output_path = tmp_path / "events.jsonl"

        # Act
        count = 0
        with open(output_path, 'w') as out:
            for event in connector.run(archive_root):
                out.write(event.to_json() + '\n')
                count += 1

        # Assert
        assert count == 2
        lines = output_path.read_text().strip().split('\n')
        assert len(lines) == 2
        ev1 = json.loads(lines[0])
        assert ev1["content"] == "First tweet"
        ev2 = json.loads(lines[1])
        assert ev2["content"] == "Second tweet"
        # Check duplicates are filtered on re-run
        count2 = sum(1 for _ in connector.run(archive_root))
        assert count2 == 0  # all deduped via checkpoint