"""Tests for SyncOrchestrator."""

import os
from pathlib import Path

import duckdb
import pytest


@pytest.fixture
def setup_env(tmp_path):
    """Set up DATA_DIR and return paths."""
    os.environ["DATA_DIR"] = str(tmp_path)
    extracts_dir = tmp_path / "extracts"
    extracts_dir.mkdir()
    analytics_dir = tmp_path / "analytics"
    analytics_dir.mkdir()
    state_dir = tmp_path / "state"
    state_dir.mkdir()
    yield {
        "data_dir": tmp_path,
        "extracts_dir": extracts_dir,
        "analytics_db": str(analytics_dir / "server.duckdb"),
    }
    # Clean up env var to avoid leaking between tests
    os.environ.pop("DATA_DIR", None)


def _create_mock_extract(extracts_dir: Path, source_name: str, tables: list[dict]):
    """Create a mock extract.duckdb with _meta and views."""
    source_dir = extracts_dir / source_name
    source_dir.mkdir()
    data_dir = source_dir / "data"
    data_dir.mkdir()

    db_path = source_dir / "extract.duckdb"
    conn = duckdb.connect(str(db_path))

    conn.execute(
        """CREATE TABLE _meta (
        table_name VARCHAR, description VARCHAR, rows BIGINT,
        size_bytes BIGINT, extracted_at TIMESTAMP,
        query_mode VARCHAR DEFAULT 'local'
    )"""
    )

    for t in tables:
        name = t["name"]
        rows_data = t.get("data", [])
        query_mode = t.get("query_mode", "local")

        # Create an actual table (simulating what a view on parquet would look like)
        if rows_data:
            cols = ", ".join(f"{k} VARCHAR" for k in rows_data[0].keys())
            conn.execute(f'CREATE TABLE "{name}" ({cols})')
            for row in rows_data:
                vals = ", ".join(f"'{v}'" for v in row.values())
                conn.execute(f'INSERT INTO "{name}" VALUES ({vals})')
        else:
            conn.execute(f'CREATE TABLE "{name}" (id VARCHAR)')

        row_count = len(rows_data)
        conn.execute(
            "INSERT INTO _meta VALUES (?, ?, ?, ?, current_timestamp, ?)",
            [name, t.get("description", ""), row_count, 0, query_mode],
        )

    conn.close()


class TestSyncOrchestrator:
    def test_rebuild_empty_extracts(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result = orch.rebuild()
        assert result == {}

    def test_rebuild_single_source(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        _create_mock_extract(
            setup_env["extracts_dir"],
            "keboola",
            [
                {"name": "orders", "data": [{"id": "1", "total": "100"}]},
                {"name": "customers", "data": [{"id": "1", "name": "Alice"}]},
            ],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result = orch.rebuild()
        assert "keboola" in result
        assert set(result["keboola"]) == {"orders", "customers"}

        # Verify views work when source is attached (as the orchestrator leaves it)
        # Open a fresh connection and re-attach to simulate how the analytics DB is used
        conn = duckdb.connect(setup_env["analytics_db"])
        try:
            extract_path = setup_env["extracts_dir"] / "keboola" / "extract.duckdb"
            conn.execute(f"ATTACH '{extract_path}' AS keboola (READ_ONLY)")
            row = conn.execute("SELECT total FROM orders WHERE id='1'").fetchone()
            assert row[0] == "100"
        finally:
            conn.close()

    def test_rebuild_multiple_sources(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        _create_mock_extract(
            setup_env["extracts_dir"],
            "keboola",
            [{"name": "orders", "data": [{"id": "1"}]}],
        )
        _create_mock_extract(
            setup_env["extracts_dir"],
            "jira",
            [{"name": "issues", "data": [{"key": "PROJ-1"}]}],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result = orch.rebuild()
        assert "keboola" in result
        assert "jira" in result

    def test_rebuild_skips_missing_extract_db(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        # Create directory without extract.duckdb
        (setup_env["extracts_dir"] / "broken").mkdir()
        _create_mock_extract(
            setup_env["extracts_dir"],
            "keboola",
            [{"name": "orders", "data": [{"id": "1"}]}],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result = orch.rebuild()
        assert "broken" not in result
        assert "keboola" in result

    def test_rebuild_source_single(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        _create_mock_extract(
            setup_env["extracts_dir"],
            "jira",
            [{"name": "issues", "data": [{"key": "PROJ-1"}]}],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        tables = orch.rebuild_source("jira")
        assert "issues" in tables

    def test_rebuild_source_nonexistent(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        tables = orch.rebuild_source("nonexistent")
        assert tables == []

    def test_rebuild_with_remote_tables(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        _create_mock_extract(
            setup_env["extracts_dir"],
            "bigquery",
            [
                {
                    "name": "page_views",
                    "query_mode": "remote",
                    "data": [{"url": "/home"}],
                }
            ],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result = orch.rebuild()
        assert "bigquery" in result
        assert "page_views" in result["bigquery"]

    def test_rebuild_idempotent(self, setup_env):
        from src.orchestrator import SyncOrchestrator

        _create_mock_extract(
            setup_env["extracts_dir"],
            "keboola",
            [{"name": "orders", "data": [{"id": "1"}]}],
        )
        orch = SyncOrchestrator(analytics_db_path=setup_env["analytics_db"])
        result1 = orch.rebuild()
        result2 = orch.rebuild()
        assert result1 == result2