from __future__ import annotations

import sqlite3
from pathlib import Path

import pytest
from peewee import IntegrityError

from repub.model import (
    AppSetting,
    Job,
    Source,
    database,
    initialize_database,
    load_feed_url,
    load_max_concurrent_jobs,
    load_settings_form,
    resolve_database_path,
    save_setting,
    schema_paths,
)


def test_resolve_database_path_defaults_to_republisher_db(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
    monkeypatch.chdir(tmp_path)
    monkeypatch.delenv("REPUBLISHER_DB_PATH", raising=False)

    assert resolve_database_path() == tmp_path / "republisher.db"


def test_resolve_database_path_prefers_environment_variable(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
    db_path = tmp_path / "env-configured.db"
    monkeypatch.setenv("REPUBLISHER_DB_PATH", str(db_path))

    assert resolve_database_path() == db_path


def test_initialize_database_bootstraps_schema_from_sql_files(tmp_path: Path) -> None:
    db_path = tmp_path / "bootstrap.db"

    initialize_database(db_path)

    connection = sqlite3.connect(db_path)
    try:
        table_names = {
            row[0]
            for row in connection.execute(
                """
                SELECT name
                FROM sqlite_master
                WHERE type = 'table' AND name NOT LIKE 'sqlite_%'
                """
            )
        }
        assert table_names == {
            "app_setting",
            "job",
            "job_execution",
            "source",
            "source_feed",
            "source_pangea",
        }

        defaults = {
            row[1]: row[4] for row in connection.execute("PRAGMA table_info('job')")
        }
        assert defaults["convert_images"] == "1"
        assert defaults["convert_video"] == "1"
    finally:
        connection.close()


def test_initialize_database_applies_newer_sql_files_to_existing_databases(
    tmp_path: Path,
) -> None:
    db_path = tmp_path / "existing.db"
    connection = sqlite3.connect(db_path)
    try:
        connection.executescript(schema_paths()[0].read_text(encoding="utf-8"))
    finally:
        connection.close()

    initialize_database(db_path)

    connection = sqlite3.connect(db_path)
    try:
        table_names = {
            row[0]
            for row in connection.execute(
                """
                SELECT name
                FROM sqlite_master
                WHERE type = 'table' AND name NOT LIKE 'sqlite_%'
                """
            )
        }
        assert "app_setting" in table_names

        job_columns = {row[1] for row in connection.execute("PRAGMA table_info('job')")}
        assert "convert_images" in job_columns
        assert "convert_video" in job_columns
    finally:
        connection.close()


def test_initialize_database_configures_sqlite_pragmas(tmp_path: Path) -> None:
    db_path = tmp_path / "pragmas.db"

    initialize_database(db_path)

    database.connect(reuse_if_open=True)
    try:
        pragma_values = {
            "cache_size": database.execute_sql("PRAGMA cache_size").fetchone()[0],
            "page_size": database.execute_sql("PRAGMA page_size").fetchone()[0],
            "journal_mode": database.execute_sql("PRAGMA journal_mode").fetchone()[0],
            "synchronous": database.execute_sql("PRAGMA synchronous").fetchone()[0],
            "temp_store": database.execute_sql("PRAGMA temp_store").fetchone()[0],
            "foreign_keys": database.execute_sql("PRAGMA foreign_keys").fetchone()[0],
            "busy_timeout": database.execute_sql("PRAGMA busy_timeout").fetchone()[0],
        }
        assert pragma_values == {
            "cache_size": 15625,
            "page_size": 4096,
            "journal_mode": "wal",
            "synchronous": 1,
            "temp_store": 2,
            "foreign_keys": 1,
            "busy_timeout": 5000,
        }
    finally:
        database.close()


def test_initialize_database_creates_scheduler_and_execution_indexes(
    tmp_path: Path,
) -> None:
    db_path = tmp_path / "indexes.db"

    initialize_database(db_path)

    connection = sqlite3.connect(db_path)
    try:
        index_names = {
            row[0]
            for row in connection.execute(
                """
                SELECT name
                FROM sqlite_master
                WHERE type = 'index'
                  AND name IN (
                    'job_enabled_idx',
                    'job_execution_job_created_at_idx',
                    'job_execution_status_started_at_idx',
                    'job_execution_status_ended_at_idx'
                  )
                """
            )
        }
        assert index_names == {
            "job_enabled_idx",
            "job_execution_job_created_at_idx",
            "job_execution_status_started_at_idx",
            "job_execution_status_ended_at_idx",
        }
    finally:
        connection.close()


def test_initialize_database_creates_run_queue_indexes(tmp_path: Path) -> None:
    db_path = tmp_path / "queue-indexes.db"

    initialize_database(db_path)

    connection = sqlite3.connect(db_path)
    try:
        indexes = {
            row[0]: row[1]
            for row in connection.execute(
                """
                SELECT name, sql
                FROM sqlite_master
                WHERE type = 'index'
                  AND name IN (
                    'job_execution_pending_created_at_idx',
                    'job_execution_pending_unique_job_idx'
                  )
                """
            )
        }
        assert set(indexes) == {
            "job_execution_pending_created_at_idx",
            "job_execution_pending_unique_job_idx",
        }
        assert indexes["job_execution_pending_unique_job_idx"] is not None
        assert (
            "WHERE running_status = 0"
            in indexes["job_execution_pending_unique_job_idx"]
        )
    finally:
        connection.close()


def test_job_table_allows_exactly_one_job_per_source(tmp_path: Path) -> None:
    initialize_database(tmp_path / "jobs.db")

    source = Source.create(
        name="Guardian feed mirror",
        slug="guardian-feed",
        source_type="feed",
    )
    Job.create(
        source=source,
        enabled=True,
        spider_arguments="",
        cron_minute="15",
        cron_hour="*",
        cron_day_of_month="*",
        cron_day_of_week="*",
        cron_month="*",
    )

    with pytest.raises(IntegrityError):
        Job.create(
            source=source,
            enabled=True,
            spider_arguments="language=en",
            cron_minute="30",
            cron_hour="*",
            cron_day_of_month="*",
            cron_day_of_week="*",
            cron_month="*",
        )


def test_load_max_concurrent_jobs_defaults_to_one(tmp_path: Path) -> None:
    initialize_database(tmp_path / "settings-defaults.db")

    assert load_max_concurrent_jobs() == 1


def test_save_setting_persists_json_value(tmp_path: Path) -> None:
    initialize_database(tmp_path / "settings-roundtrip.db")

    save_setting("max_concurrent_jobs", 4)

    row = AppSetting.get(AppSetting.key == "max_concurrent_jobs")

    assert row.value == "4"
    assert load_max_concurrent_jobs() == 4


def test_load_settings_form_includes_feed_url(tmp_path: Path) -> None:
    initialize_database(tmp_path / "settings-form.db")
    save_setting("feed_url", "https://mirror.example")

    assert load_feed_url() == "https://mirror.example"
    assert load_settings_form() == {
        "max_concurrent_jobs": 1,
        "feed_url": "https://mirror.example",
    }