import json
import os
import sqlite3
import sys
from pathlib import Path

import pytest

SCRIPTS = Path(__file__).parent.parent / "scripts"
sys.path.insert(0, str(SCRIPTS))

from db import get_db, init_db
import remind_edit


def _run(db_path, argv):
    """Run remind_edit main with a temporary DB path."""
    original_db_path = remind_edit.DB_PATH
    try:
        remind_edit.DB_PATH = db_path
        # Patch the module-level DB_PATH used by functions
        sys.argv = ["remind_edit.py"] + argv
        return remind_edit.main()
    finally:
        remind_edit.DB_PATH = original_db_path


def test_add_list(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, ["add", "--text", "drink water", "--cron", "0 9 * * *"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert data["added"]["text"] == "drink water"
    assert len(data["added"]["cron"]) == 1

    ret = _run(db_path, ["list"])
    captured = capsys.readouterr()
    assert ret == 0
    assert "drink water" in captured.out
    assert "cron: 0 9 * * *" in captured.out


def test_add_at_validation(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, ["add", "--text", "x", "--at", "not-a-date"])
    captured = capsys.readouterr()
    assert ret == 1
    assert "invalid --at datetime" in captured.err


def test_add_cron_validation(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, ["add", "--text", "x", "--cron", "bad"])
    captured = capsys.readouterr()
    assert ret == 1
    assert "invalid cron expression" in captured.err


def test_remove(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    _run(db_path, ["add", "--text", "stretch", "--cron", "0 10 * * *"])
    capsys.readouterr()  # clear setup output
    ret = _run(db_path, ["remove", "--keyword", "stretch"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert data["removed"]["text"] == "stretch"

    ret = _run(db_path, ["list"])
    captured = capsys.readouterr()
    assert captured.out.strip() == ""


def test_remove_no_match(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, ["remove", "--keyword", "nonexistent"])
    captured = capsys.readouterr()
    assert ret == 1
    assert "no match" in captured.err


def test_remove_ambiguous(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    _run(db_path, ["add", "--text", "drink water", "--cron", "0 9 * * *"])
    _run(db_path, ["add", "--text", "drink tea", "--cron", "0 10 * * *"])
    ret = _run(db_path, ["remove", "--keyword", "drink"])
    captured = capsys.readouterr()
    assert ret == 1
    assert "ambiguous" in captured.err


def test_edit_text(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    _run(db_path, ["add", "--text", "old text", "--cron", "0 9 * * *"])
    capsys.readouterr()  # clear setup output
    ret = _run(db_path, ["edit", "--keyword", "old", "--text", "new text"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert data["edited"]["text"] == "new text"


def test_edit_replace_schedules(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    _run(db_path, ["add", "--text", "task", "--cron", "0 9 * * *"])
    capsys.readouterr()  # clear setup output
    ret = _run(db_path, ["edit", "--keyword", "task", "--replace-schedules", "--at", "2026-06-15T10:00:00"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert len(data["edited"]["cron"]) == 0
    assert len(data["edited"]["at"]) == 1


def test_enable_disable(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    _run(db_path, ["add", "--text", "toggle me", "--cron", "0 9 * * *"])
    capsys.readouterr()  # clear setup output

    ret = _run(db_path, ["disable", "--keyword", "toggle"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert data["disabled"]["enabled"] == 0

    ret = _run(db_path, ["enable", "--keyword", "toggle"])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert data["enabled"]["enabled"] == 1


def test_add_combined_schedules(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, [
        "add", "--text", "multi",
        "--at", "2026-06-15T10:00:00",
        "--cron", "0 9 * * *",
        "--random-times-per-day", "2",
        "--random-window", "08:00-20:00",
    ])
    captured = capsys.readouterr()
    assert ret == 0
    data = json.loads(captured.out)
    assert len(data["added"]["at"]) == 1
    assert len(data["added"]["cron"]) == 1
    assert len(data["added"]["random"]) == 1


def test_add_random_validation(tmp_path, capsys):
    db_path = tmp_path / "test.sqlite"
    init_db(db_path)

    ret = _run(db_path, [
        "add", "--text", "bad",
        "--random-times-per-day", "2",
        "--random-window", "08:00-08:01",
    ])
    captured = capsys.readouterr()
    assert ret == 1
    assert "window" in captured.err.lower() or "gap" in captured.err.lower()