import json
import time
import uuid
import gradio as gr
from config import MATERIALS_JSON, CODES_JSON

def read_json(file_path):
    with open(file_path, 'r', encoding='utf-8') as f:
        return json.load(f)

def write_json(file_path, data):
    with open(file_path, 'w', encoding='utf-8') as f:
        json.dump(data, f, ensure_ascii=False, indent=2)

def get_all_subjects(section):
    json_file = MATERIALS_JSON if section == "学习资料" else CODES_JSON
    data = read_json(json_file)
    subjects = sorted(set(item["subject"] for item in data if item["subject"]))
    return subjects if subjects else ["无可用学科"]

def add_row(inputs):
    if len(inputs) < 10:
        inputs.append({"subject": "", "link": "", "contributor": ""})
    updates = [inputs]  # 第一个是 State
    for i in range(10):
        updates.append(gr.update(visible=i < len(inputs)))
    return updates


def update_input_value(index, subject, link, contributor, inputs):
    if index < len(inputs):
        inputs[index] = {"subject": subject, "link": link, "contributor": contributor}
    return inputs


def submit_material(section, inputs):
    from config import MATERIALS_JSON, CODES_JSON
    json_file = MATERIALS_JSON if section == "学习资料" else CODES_JSON
    valid_inputs = [item for item in inputs if item["subject"].strip() and item["link"].strip() and item["contributor"].strip()]
    if not valid_inputs:
        return (
            f"**{section}** 投稿失败：请至少添加一个科目、链接和贡献人！",
            "",
            inputs,
            *[gr.update(visible=i < len(inputs)) for i in range(10)]
        )
    selected_subjects = [item["subject"].strip() for item in valid_inputs]
    if len(selected_subjects) != len(set(selected_subjects)):
        return (
            f"**{section}** 投稿失败：每个科目只能关联一个链接，请勿重复输入科目！",
            "",
            inputs,
            *[gr.update(visible=i < len(inputs)) for i in range(10)]
        )
    data = read_json(json_file)
    submission_ids = []
    for item in valid_inputs:
        submission_id = str(uuid.uuid4())
        file_name = f"{item['subject']}_{int(time.time())}"
        submission = {
            "id": submission_id,
            "name": file_name,
            "subject": item["subject"].strip(),
            "link": item["link"].strip(),
            "contributor": item["contributor"].strip(),
            "timestamp": time.strftime("%Y-%m-%d %H:%M:%S"),
            "is_reviewed": False,
            "is_approved": False,
            "reason": ""
        }
        data.append(submission)
        submission_ids.append(submission_id)
    write_json(json_file, data)
    inputs[:] = [{"subject": "", "link": "", "contributor": ""}]
    return (
        f"**{section}** 投稿成功！\n唯一编码：\n" + "\n".join([f"- `{sid}`" for sid in submission_ids]) +
        "\n请保存这些编码以查询审核状态！",
        "",
        inputs,
        gr.update(visible=True),  
        *[gr.update(visible=False) for _ in range(9)] 
    )

def check_submission_status(submission_id, section):
    json_file = MATERIALS_JSON if section == "学习资料" else CODES_JSON
    data = read_json(json_file)
    for item in data:
        if item["id"] == submission_id:
            if not item["is_reviewed"]:
                return f"**{section}** 投稿状态：待审核，感谢你的贡献！"
            elif item["is_approved"]:
                return (f"**{section}** 投稿状态：审核成功，感谢你的贡献！\n"
                        f"您上传的科目版本：{item['name']}")
            else:
                return f"**{section}** 投稿状态：审核失败\n原因：{item['reason']}"
    return f"未找到 **{section}** 的投稿编码 `{submission_id}`！"

def query_available_materials(section):
    json_file = MATERIALS_JSON if section == "学习资料" else CODES_JSON
    data = read_json(json_file)
    approved = [item for item in data if item["is_approved"]]
    if not approved:
        return f"暂无已审核的 **{section}**！"
    subject_groups = {}
    for item in approved:
        subject = item["subject"]
        if subject not in subject_groups:
            subject_groups[subject] = []
        subject_groups[subject].append(item["name"])
    result = f"## 当前已审核的 {section}\n"
    for subject in sorted(subject_groups.keys()):
        names = subject_groups[subject]
        result += f"{subject} {len(names)} 个：\n"
        for name in sorted(names):
            result += f"- {name}\n"
        result += "\n"
    return result.strip()

def search_materials(subject, section):
    json_file = MATERIALS_JSON if section == "学习资料" else CODES_JSON
    data = read_json(json_file)
    approved = [item for item in data if item["is_approved"] and item["subject"] == subject]
    if not approved:
        return f"暂无 **{subject}** 的 **{section}**！"
    result = f"## {subject} 的 {section}\n"
    for item in approved:
        result += f"- **{item['name']}**：{item['link']}\n"
    return result