"""装箱单 build_context 纯逻辑测试（不连数据库）。

字段集（v3）：序号/产品名称/产品型号/量程/数量/位号/备注。
产品名称取自合同表 [客户名称]（历史遗留命名，实为产品名称）。
"""
from datetime import datetime

import pytest

from reports.packing_list.transform import (
    EmptyBoxError,
    build_context,
)

# —— 真实样本：R04398/箱1，3 项，含位号，合计 4+4+5=13 ——
ROWS_R04398 = [
    {
        "paichan_no": "R04398", "box_no": 1,
        "created_at": datetime(2026, 5, 26, 8, 58, 44, 473000),
        "zongpai_no": "26B14077", "box_qty": 4,
        "product_name": "压力表(不锈钢压力表)",
        "model": "YTH-100.A0.531.M201.M08|BP-088.2312.M08.0A3|WHP.70X20X1.3",
        "range_": "0-1.6MPa", "weihao": "PG-01105,PG-01106,PG-01107,PG-01108",
        "remark": "", "order_no": "26YB0410175",
    },
    {
        "paichan_no": "R04398", "box_no": 1,
        "created_at": datetime(2026, 5, 26, 8, 58, 44, 473000),
        "zongpai_no": "26B14078", "box_qty": 4,
        "product_name": "耐震压力表(不锈钢耐震压力表)",
        "model": "YTHN-100.A0.531.M201.M05.Y3|BP-088.2312.M05.0A3|WHP.70X20X1.3",
        "range_": "0-0.4MPa", "weihao": "PG-00401A,PG-00401B,PG-00405A,PG-00405B",
        "remark": "", "order_no": "26YB0410175",
    },
    {
        "paichan_no": "R04398", "box_no": 1,
        "created_at": datetime(2026, 5, 26, 8, 58, 44, 473000),
        "zongpai_no": "26B14079", "box_qty": 5,
        "product_name": "耐震压力表(不锈钢耐震压力表)",
        "model": "YTHN-100.A0.531.M201.M07.Y3|BP-088.2312.M07.0A3|WHP.70X20X1.3",
        "range_": "0-1MPa", "weihao": "PG-00801A,PG-01201,PG-01202,PG-01203A,PG-01203B",
        "remark": "", "order_no": "26YB0410175",
    },
]


def test_box_header_fields():
    ctx = build_context(ROWS_R04398)
    assert ctx["paichan_no"] == "R04398"
    assert ctx["box_no"] == 1
    assert ctx["pack_date"] == "2026-05-26"
    assert ctx["order_no"] == "26YB0410175"


def test_total_qty_is_sum():
    ctx = build_context(ROWS_R04398)
    assert ctx["total_qty"] == 13  # 4 + 4 + 5


def test_rows_flattened_with_sequence():
    """明细行预展开为 r0_/r1_/r2_，序号从 1 起。"""
    ctx = build_context(ROWS_R04398)
    assert ctx["r0_seq"] == "1"
    assert ctx["r1_seq"] == "2"
    assert ctx["r2_seq"] == "3"
    assert ctx["r0_qty"] == "4"
    assert ctx["r2_qty"] == "5"


def test_product_name_from_kehu_mingcheng():
    """产品名称取自 product_name（即合同表 [客户名称]）。"""
    ctx = build_context(ROWS_R04398)
    assert ctx["r0_product_name"] == "压力表(不锈钢压力表)"
    assert ctx["r1_product_name"] == "耐震压力表(不锈钢耐震压力表)"


def test_row_show_flags():
    ctx = build_context(ROWS_R04398)
    assert ctx["r0_show"] == "1"
    assert ctx["r2_show"] == "1"
    assert ctx["r3_show"] == ""  # 第 4 行无数据


def test_weihao_populated():
    ctx = build_context(ROWS_R04398)
    assert ctx["r0_weihao"] == "PG-01105,PG-01106,PG-01107,PG-01108"


def test_remark_blank_when_empty():
    """备注为空时留白。"""
    ctx = build_context(ROWS_R04398)
    assert ctx["r0_remark"] == ""


def test_weihao_and_remark_blank():
    rows = [
        {
            "paichan_no": "R07425", "box_no": 1,
            "created_at": datetime(2026, 5, 26, 8, 58, 44),
            "zongpai_no": "26B24529", "box_qty": 1,
            "product_name": "耐震压力表",
            "model": "YTHN-100.A0.531.M201.M09.Y3|BP-088.2312.M09.0p3",
            "range_": "0-2.5MPa", "weihao": "", "remark": "",
            "order_no": "26YB0210489",
        }
    ]
    ctx = build_context(rows)
    assert ctx["r0_weihao"] == ""
    assert ctx["r0_remark"] == ""
    assert ctx["total_qty"] == 1


def test_none_values_cleaned_to_blank():
    rows = [
        {
            "paichan_no": "X001", "box_no": 2,
            "created_at": None,
            "zongpai_no": "26B1", "box_qty": None,
            "product_name": None, "model": None, "range_": None,
            "weihao": None, "remark": None, "order_no": None,
        }
    ]
    ctx = build_context(rows)
    assert ctx["pack_date"] == ""
    assert ctx["order_no"] == ""
    assert ctx["r0_product_name"] == ""
    assert ctx["r0_model"] == ""
    assert ctx["r0_qty"] == "0"
    assert ctx["total_qty"] == 0


def test_iso_string_date():
    rows = [
        {
            "paichan_no": "X002", "box_no": 1,
            "created_at": "2026-07-30T10:00:00Z",
            "zongpai_no": "26B2", "box_qty": 7,
            "product_name": "P", "model": "M", "range_": "R",
            "weihao": "W", "remark": "RM", "order_no": "O",
        }
    ]
    ctx = build_context(rows)
    assert ctx["pack_date"] == "2026-07-30"


def test_empty_rows_raise():
    with pytest.raises(EmptyBoxError):
        build_context([])


def test_row_heights_estimated():
    ctx = build_context(ROWS_R04398)
    assert len(ctx["row_heights"]) == 8
    assert all(h > 0 for h in ctx["row_heights"][:3])
    assert ctx["row_heights"][3] == 0.0