# -*- coding: utf-8 -*-
"""投标技术方案配图工具：与既有模块蓝图风格一致的扁平框图绘制。

坐标系统一为 0..100（x）× 0..100（y），左上角为 (0,100)。
"""

import os

import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
from matplotlib.patches import FancyArrowPatch, FancyBboxPatch

plt.rcParams["font.sans-serif"] = ["Microsoft YaHei", "SimHei"]
plt.rcParams["axes.unicode_minus"] = False

ASSETS = os.path.join(os.path.dirname(os.path.abspath(__file__)), "_bid_assets")
os.makedirs(ASSETS, exist_ok=True)

# 与既有蓝图一致的配色
C = {
    "blue": "#2E75B6",
    "blue_d": "#1F4E79",
    "orange": "#E36C0A",
    "green": "#2E8B57",
    "green_d": "#1F6B3F",
    "purple": "#7030A0",
    "red": "#C00000",
    "teal": "#0F8B8D",
    "gray": "#8C8C8C",
    "gold": "#BF8F00",
}
PANEL = {
    "blue": "#EAF1F8",
    "orange": "#FDF1E4",
    "green": "#EAF5EE",
    "purple": "#F2EAF8",
    "gray": "#F2F2F2",
    "teal": "#E6F4F4",
    "red": "#FBEAEA",
}
TITLE_C = "#1F4E79"
EDGE_C = "#BFBFBF"
ARROW_C = "#7F7F7F"


class Fig:
    def __init__(self, title, w=13.0, h=7.2, sub=None):
        self.fig, self.ax = plt.subplots(figsize=(w, h), dpi=200)
        self.ax.set_xlim(0, 100)
        self.ax.set_ylim(0, 100)
        self.ax.axis("off")
        self.fig.subplots_adjust(left=0.01, right=0.99, top=0.99, bottom=0.01)
        top = 96.5
        self.ax.text(50, top, title, ha="center", va="top",
                     fontsize=15, fontweight="bold", color=TITLE_C)
        if sub:
            self.ax.text(50, top - 4.2, sub, ha="center", va="top",
                         fontsize=9, color="#595959")

    # ---------------------------------------------------------------- 图元
    def panel(self, x, y, w, h, label=None, tone="blue"):
        """分组底板（x,y 为左上角）。"""
        self.ax.add_patch(FancyBboxPatch(
            (x, y - h), w, h, boxstyle="round,pad=0,rounding_size=1.2",
            linewidth=0.8, edgecolor=EDGE_C, facecolor=PANEL[tone], zorder=1))
        if label:
            self.ax.text(x + 1.6, y - 2.1, label, ha="left", va="center",
                         fontsize=10, fontweight="bold", color="#404040", zorder=3)

    def box(self, x, y, w, h, text, tone="blue", fs=9.2, fc=None, tc="white",
            bold=True, edge=None):
        """实心圆角框（x,y 为左上角），返回锚点字典。"""
        face = fc or C[tone]
        self.ax.add_patch(FancyBboxPatch(
            (x, y - h), w, h, boxstyle="round,pad=0,rounding_size=0.9",
            linewidth=0.9 if edge else 0, edgecolor=edge or "none",
            facecolor=face, zorder=4))
        self.ax.text(x + w / 2, y - h / 2, text, ha="center", va="center",
                     fontsize=fs, color=tc, zorder=5,
                     fontweight="bold" if bold else "normal", linespacing=1.45)
        return {"l": (x, y - h / 2), "r": (x + w, y - h / 2),
                "t": (x + w / 2, y), "b": (x + w / 2, y - h),
                "c": (x + w / 2, y - h / 2), "box": (x, y, w, h)}

    def obox(self, x, y, w, h, text, tone="gray", fs=9.0):
        """描边框（浅底深字）。"""
        return self.box(x, y, w, h, text, fc="white", tc="#404040",
                        edge=C[tone], fs=fs, bold=False)

    def arrow(self, a, b, style="-|>", color=None, lw=1.2, rad=0.0, dashed=False):
        self.ax.add_patch(FancyArrowPatch(
            a, b, arrowstyle=style, mutation_scale=11,
            linewidth=lw, color=color or ARROW_C, zorder=3,
            linestyle="--" if dashed else "-",
            connectionstyle=f"arc3,rad={rad}", shrinkA=1.5, shrinkB=1.5))

    def chain(self, anchors, port=("r", "l"), **kw):
        for a, b in zip(anchors, anchors[1:]):
            self.arrow(a[port[0]], b[port[1]], **kw)

    def note(self, x, y, text, fs=8.2, color="#595959", ha="left", va="center"):
        self.ax.text(x, y, text, fontsize=fs, color=color, ha=ha, va=va,
                     linespacing=1.5, zorder=6)

    def elbow(self, a, b, mid=None, color=None, lw=1.3, dashed=False):
        """直角折线连接：a 向下出、经水平段、再进入 b 顶部。"""
        my = mid if mid is not None else (a[1] + b[1]) / 2
        pts = [a, (a[0], my), (b[0], my)]
        xs = [p[0] for p in pts]
        ys = [p[1] for p in pts]
        self.ax.plot(xs, ys, color=color or ARROW_C, linewidth=lw, zorder=3,
                     solid_capstyle="round",
                     linestyle="--" if dashed else "-")
        self.arrow((b[0], my), b, color=color, lw=lw, dashed=dashed)

    def crop(self, ymin, ymax=100.0):
        self.ax.set_ylim(ymin, ymax)

    def save(self, name):
        path = os.path.join(ASSETS, name + ".png")
        self.fig.savefig(path, facecolor="white", bbox_inches="tight",
                         pad_inches=0.12)
        plt.close(self.fig)
        kb = os.path.getsize(path) // 1024
        print(f"  [图] {name + '.png':<28} {kb:>5} KB")
        return path


def row(x0, y, w, h, n, gap, texts, f, tone="blue", **kw):
    """水平等距排列 n 个框。"""
    out = []
    for i in range(n):
        out.append(f.box(x0 + i * (w + gap), y, w, h, texts[i], tone=tone, **kw))
    return out