# -*- coding:utf-8 -*-
"""
hive-ddl-gen 渲染 / sync ini 解析 / writer.path 反推单测。

不连真 PG（fetch_column_comments 走 mock conn）。
脚本路径含连字符，用 importlib.util 动态加载为模块。
"""
import importlib.util
import os
import sys
from unittest.mock import MagicMock

import pytest

PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))))
SCRIPT_PATH = os.path.join(PROJECT_ROOT, 'bin', 'hive-ddl-gen.py')


def _load_script():
    spec = importlib.util.spec_from_file_location('hive_ddl_gen', SCRIPT_PATH)
    mod = importlib.util.module_from_spec(spec)
    sys.modules['hive_ddl_gen'] = mod
    spec.loader.exec_module(mod)
    return mod


GEN = _load_script()


def test_reverse_table_name_basic():
    assert GEN.reverse_table_name(
        '/user/hive/warehouse/raw.db/raw_trd_card_group_order_info_inc_d/dt=${dt}/'
    ) == 'raw_trd_card_group_order_info_inc_d'


def test_reverse_table_name_no_trailing_slash():
    assert GEN.reverse_table_name(
        '/user/hive/warehouse/raw.db/foo/dt=20260429'
    ) == 'foo'


def test_reverse_table_name_missing_dt_segment_raises():
    with pytest.raises(ValueError, match='dt='):
        GEN.reverse_table_name('/user/hive/warehouse/raw.db/foo/')


def test_parse_sync_ini_basic(tmp_path):
    p = tmp_path / 'sync.ini'
    p.write_text(
        '[reader]\n'
        'dataSource = postgresql/prd-poyee\n'
        'table = public.users\n'
        'column = id, name, create_time\n'
        '\n'
        '[writer]\n'
        'path = /user/hive/warehouse/raw.db/raw_usr_users_inc_d/dt=${dt}/\n',
        encoding='utf-8',
    )
    spec = GEN.parse_sync_ini(str(p))
    assert spec == {
        'ds_ref': 'postgresql/prd-poyee',
        'schema': 'public',
        'table': 'users',
        'columns': ['id', 'name', 'create_time'],
        'writer_path': '/user/hive/warehouse/raw.db/raw_usr_users_inc_d/dt=${dt}/',
    }


def test_parse_sync_ini_missing_file_raises():
    with pytest.raises(FileNotFoundError, match='sync ini 不存在'):
        GEN.parse_sync_ini('/nonexistent/x.ini')


def test_parse_sync_ini_missing_writer_section_raises(tmp_path):
    p = tmp_path / 'bad.ini'
    p.write_text(
        '[reader]\ndataSource = a/b\ntable = s.t\ncolumn = id\n',
        encoding='utf-8',
    )
    with pytest.raises(KeyError, match='\\[writer\\]'):
        GEN.parse_sync_ini(str(p))


def test_parse_sync_ini_table_without_dot_raises(tmp_path):
    p = tmp_path / 'bad.ini'
    p.write_text(
        '[reader]\ndataSource = a/b\ntable = users\ncolumn = id\n'
        '[writer]\npath = /x/dt=${dt}/\n',
        encoding='utf-8',
    )
    with pytest.raises(ValueError, match='schema.table'):
        GEN.parse_sync_ini(str(p))


def test_parse_sync_ini_empty_column_raises(tmp_path):
    p = tmp_path / 'bad.ini'
    p.write_text(
        '[reader]\ndataSource = a/b\ntable = s.t\ncolumn =\n'
        '[writer]\npath = /x/dt=${dt}/\n',
        encoding='utf-8',
    )
    with pytest.raises(ValueError, match='column'):
        GEN.parse_sync_ini(str(p))


def test_render_raw_ddl_field_order_follows_columns():
    columns = ['id', 'name', 'create_time']
    comments = {'id': 'id', 'name': '姓名', 'create_time': '创建时间'}
    out = GEN.render_raw_ddl('raw_usr_users_inc_d', columns, comments)
    assert 'CREATE EXTERNAL TABLE IF NOT EXISTS raw.raw_usr_users_inc_d (' in out
    id_idx = out.index("'id'")
    name_idx = out.index("'姓名'")
    ct_idx = out.index("'创建时间'")
    assert id_idx < name_idx < ct_idx
    assert 'PARTITIONED BY (dt STRING)' in out
    assert 'STORED AS ORC' in out
    assert "LOCATION '/user/hive/warehouse/raw.db/raw_usr_users_inc_d';" in out


def test_render_raw_ddl_missing_comment_blank():
    out = GEN.render_raw_ddl('t', ['col_no_cmt'], {})
    assert "col_no_cmt" in out
    assert "COMMENT ''" in out


def test_render_raw_ddl_single_quote_in_comment_escaped():
    out = GEN.render_raw_ddl('t', ['col'], {'col': "don't"})
    assert "COMMENT 'don''t'" in out


def test_render_raw_ddl_last_column_no_trailing_comma():
    out = GEN.render_raw_ddl('t', ['a', 'b'], {})
    field_lines = [l for l in out.split('\n') if l.startswith('    ')]
    assert len(field_lines) == 2
    assert field_lines[0].rstrip().endswith(',')
    assert not field_lines[1].rstrip().endswith(',')
    # 逗号在 COMMENT 'xxx' 末尾，不在 STRING 后
    assert 'STRING,' not in out
    assert "COMMENT ''," in field_lines[0]


def test_render_raw_ddl_external_and_drop():
    out = GEN.render_raw_ddl('t', ['a'], {})
    assert 'DROP TABLE IF EXISTS raw.t;' in out
    assert 'CREATE EXTERNAL TABLE IF NOT EXISTS raw.t (' in out


def _patch_main_dependencies(monkeypatch, tmp_path):
    """共享 mock：让 main() 不连真 PG / 真 datasource。"""
    sync_ini = tmp_path / 'sync.ini'
    sync_ini.write_text(
        '[reader]\n'
        'dataSource = postgresql/prd-poyee\n'
        'table = public.users\n'
        'column = id, name\n'
        '\n'
        '[writer]\n'
        'path = /user/hive/warehouse/raw.db/raw_usr_users_inc_d/dt=${dt}/\n',
        encoding='utf-8',
    )

    fake_ds = MagicMock()
    fake_ds.parse.return_value = {
        GEN.SYNC_GEN.DS_POSTGRE_SQL_JDBC_URL: 'jdbc:postgresql://10.0.0.1:5432/mydb',
        'username': 'u',
        'password': 'p',
    }
    monkeypatch.setattr(GEN.SYNC_GEN, 'resolve_datasource', lambda ref: fake_ds)

    fake_conn = MagicMock()
    fake_cur = fake_conn.cursor.return_value
    fake_cur.fetchall.return_value = [
        (1, 'id', 'id', 'bigint', 'PK'),
        (2, 'name', '姓名', 'character varying', ''),
    ]
    fake_pg8000 = MagicMock()
    fake_pg8000.dbapi.connect.return_value = fake_conn
    monkeypatch.setitem(sys.modules, 'pg8000', fake_pg8000)
    monkeypatch.setitem(sys.modules, 'pg8000.dbapi', fake_pg8000.dbapi)

    return str(sync_ini)


def test_main_l_ods_raises_not_implemented(monkeypatch, tmp_path):
    sync_ini = _patch_main_dependencies(monkeypatch, tmp_path)
    monkeypatch.setattr(sys, 'argv', [
        'hive-ddl-gen.py', '-l', 'ods', '-ini', sync_ini,
    ])
    with pytest.raises(NotImplementedError, match='ods'):
        GEN.main()


def test_main_stdout_only_when_no_o(monkeypatch, capsys, tmp_path):
    sync_ini = _patch_main_dependencies(monkeypatch, tmp_path)
    monkeypatch.setattr(sys, 'argv', [
        'hive-ddl-gen.py', '-l', 'raw', '-ini', sync_ini,
    ])
    GEN.main()
    captured = capsys.readouterr()
    assert 'CREATE EXTERNAL TABLE IF NOT EXISTS raw.raw_usr_users_inc_d (' in captured.out
    assert "'姓名'" in captured.out
    assert '已写入' not in captured.err


def test_main_stdout_and_disk_when_o_with_dir(monkeypatch, capsys, tmp_path):
    sync_ini = _patch_main_dependencies(monkeypatch, tmp_path)
    out_dir = tmp_path / 'out'
    monkeypatch.setattr(sys, 'argv', [
        'hive-ddl-gen.py', '-l', 'raw', '-ini', sync_ini, '-o', str(out_dir),
    ])
    GEN.main()
    captured = capsys.readouterr()
    assert 'CREATE EXTERNAL TABLE IF NOT EXISTS raw.raw_usr_users_inc_d (' in captured.out
    assert '已写入' in captured.err
    assert (out_dir / 'raw_usr_users_inc_d_create.sql').exists()


def test_main_stdout_and_disk_when_o_no_value(monkeypatch, capsys, tmp_path):
    sync_ini = _patch_main_dependencies(monkeypatch, tmp_path)
    monkeypatch.setattr(GEN, 'WORKSPACE_DEFAULT', str(tmp_path / 'workspace'))
    monkeypatch.setattr(sys, 'argv', [
        'hive-ddl-gen.py', '-l', 'raw', '-ini', sync_ini, '-o',
    ])
    GEN.main()
    captured = capsys.readouterr()
    assert 'CREATE EXTERNAL TABLE IF NOT EXISTS raw.raw_usr_users_inc_d (' in captured.out
    assert '已写入' in captured.err