# utils/output_writer.py - 代码文件 & JSON 输出 & 项目信息渲染
import os
import json
from pathlib import Path
from typing import Dict, List, Any

import config

VALID_TYPES = {
    "integer", "string", "boolean", "float",
    "list", "dict", "object", "void", "any",
}
VALID_INOUT = {"in", "out", "inout"}


# ══════════════════════════════════════════════════════
#  目录管理
# ══════════════════════════════════════════════════════

def build_project_output_dir(project_name: str) -> str:
    safe = "".join(c if c.isalnum() or c in "-_" else "_" for c in project_name)
    return os.path.join(config.OUTPUT_BASE_DIR, safe)


def ensure_project_dir(project_name: str) -> str:
    """确保项目根输出目录存在，并创建 __init__.py"""
    output_dir = build_project_output_dir(project_name)
    os.makedirs(output_dir, exist_ok=True)
    init_file = os.path.join(output_dir, "__init__.py")
    if not os.path.exists(init_file):
        Path(init_file).write_text("# Auto-generated project package\n", encoding="utf-8")
    return output_dir


def ensure_module_dir(output_dir: str, module: str) -> str:
    """确保模块子目录存在，并创建 __init__.py"""
    module_dir = os.path.join(output_dir, module)
    os.makedirs(module_dir, exist_ok=True)
    init_file = os.path.join(module_dir, "__init__.py")
    if not os.path.exists(init_file):
        Path(init_file).write_text(
            f"# Auto-generated module package: {module}\n", encoding="utf-8"
        )
    return module_dir


# ══════════════════════════════════════════════════════
#  README
# ══════════════════════════════════════════════════════

def write_project_readme(
    output_dir:           str,
    project_name:         str,
    project_description:  str,
    requirements_summary: str,
    modules:              List[str] = None,
) -> str:
    """生成项目 README.md"""
    module_section = ""
    if modules:
        module_list    = "\n".join(f"- `{m}/`" for m in sorted(set(modules)))
        module_section = f"\n## 功能模块\n\n{module_list}\n"

    content = f"""# {project_name}

> Auto-generated by Requirement Analyzer

{project_description or ""}
{module_section}
## 功能需求列表

{requirements_summary}
"""
    path = os.path.join(output_dir, "README.md")
    Path(path).write_text(content, encoding="utf-8")
    return path


# ══════════════════════════════════════════════════════
#  函数签名 JSON 导出
# ══════════════════════════════════════════════════════

def build_signatures_document(
    project_name:        str,
    project_description: str,
    signatures:          List[dict],
) -> dict:
    return {
        "project":     project_name,
        "description": project_description or "",
        "functions":   signatures,
    }


def patch_signatures_with_url(
    signatures:       List[dict],
    func_name_to_url: Dict[str, str],
) -> List[dict]:
    for sig in signatures:
        url = func_name_to_url.get(sig.get("name", ""), "")
        _insert_field_after(sig, after_key="type", new_key="url", new_value=url)
    return signatures


def _insert_field_after(d: dict, after_key: str, new_key: str, new_value) -> None:
    if new_key in d:
        d[new_key] = new_value
        return
    items      = list(d.items())
    insert_pos = next((i + 1 for i, (k, _) in enumerate(items) if k == after_key), len(items))
    items.insert(insert_pos, (new_key, new_value))
    d.clear()
    d.update(items)


def write_function_signatures_json(
    output_dir:          str,
    signatures:          List[dict],
    project_name:        str,
    project_description: str,
    file_name:           str = "function_signatures.json",
) -> str:
    os.makedirs(output_dir, exist_ok=True)
    document  = build_signatures_document(project_name, project_description, signatures)
    file_path = os.path.join(output_dir, file_name)
    with open(file_path, "w", encoding="utf-8") as f:
        json.dump(document, f, ensure_ascii=False, indent=2)
    return file_path


# ══════════════════════════════════════════════════════
#  签名结构校验
# ══════════════════════════════════════════════════════

def validate_signature_schema(signature: dict) -> List[str]:
    errors: List[str] = []
    for key in ("name", "requirement_id", "description", "type", "parameters"):
        if key not in signature:
            errors.append(f"缺少顶层字段: '{key}'")

    if "url" in signature:
        if not isinstance(signature["url"], str):
            errors.append("'url' 字段必须是字符串类型")
        elif signature["url"] == "":
            errors.append("'url' 字段不能为空字符串")

    params = signature.get("parameters", {})
    if isinstance(params, dict):
        for pname, pdef in params.items():
            if not isinstance(pdef, dict):
                errors.append(f"参数 '{pname}' 定义必须是 dict")
                continue
            if "type" not in pdef:
                errors.append(f"参数 '{pname}' 缺少 'type'")
            else:
                parts = [p.strip() for p in pdef["type"].split("|")]
                if not all(p in VALID_TYPES for p in parts):
                    errors.append(f"参数 '{pname}' type='{pdef['type']}' 含不合法类型")
            if "inout" not in pdef:
                errors.append(f"参数 '{pname}' 缺少 'inout'")
            elif pdef["inout"] not in VALID_INOUT:
                errors.append(f"参数 '{pname}' inout='{pdef['inout']}' 应为 in/out/inout")
            if "required" not in pdef:
                errors.append(f"参数 '{pname}' 缺少 'required'")
            elif not isinstance(pdef["required"], bool):
                errors.append(f"参数 '{pname}' 'required' 应为布尔值")

    ret = signature.get("return")
    if ret is None:
        errors.append("缺少 'return' 字段")
    elif isinstance(ret, dict):
        ret_type = ret.get("type")
        if not ret_type:
            errors.append("'return' 缺少 'type'")
        elif ret_type not in VALID_TYPES:
            errors.append(f"'return.type'='{ret_type}' 不合法")
        is_void = (ret_type == "void")
        for sub_key in ("on_success", "on_failure"):
            sub = ret.get(sub_key)
            if is_void:
                if sub is not None:
                    errors.append(f"void 函数 'return.{sub_key}' 应为 null")
            else:
                if sub is None:
                    errors.append(f"非 void 函数缺少 'return.{sub_key}'")
                elif isinstance(sub, dict):
                    if not sub.get("value"):
                        errors.append(f"'return.{sub_key}.value' 不能为空")
                    if not sub.get("description"):
                        errors.append(f"'return.{sub_key}.description' 不能为空")
    return errors


def validate_all_signatures(signatures: List[dict]) -> Dict[str, List[str]]:
    return {
        sig.get("name", f"unknown_{i}"): errs
        for i, sig in enumerate(signatures)
        if (errs := validate_signature_schema(sig))
    }


# ══════════════════════════════════════════════════════
#  项目信息渲染（需求-模块-代码关系树）
# ══════════════════════════════════════════════════════

def render_project_info(full_info: Dict[str, Any], console) -> None:
    """
    使用 rich 将项目完整信息（需求-模块-代码关系）渲染到终端。

    Args:
        full_info: DBManager.get_project_full_info() 返回的字典
        console:   rich.console.Console 实例
    """
    from rich.table import Table
    from rich.panel import Panel
    from rich.tree  import Tree
    from rich.text  import Text

    project = full_info["project"]
    stats   = full_info["stats"]
    modules = full_info["modules"]
    raw_reqs = full_info["raw_requirements"]

    # ── 项目基本信息 ──────────────────────────────────
    info_table = Table(show_header=False, box=None, padding=(0, 2))
    info_table.add_column("key",   style="bold cyan",  width=14)
    info_table.add_column("value", style="white")
    info_table.add_row("项目 ID",    str(project.id))
    info_table.add_row("项目名称",   project.name)
    info_table.add_row("目标语言",   project.language)
    info_table.add_row("描述",       project.description or "(无)")
    info_table.add_row("输出目录",   project.output_dir or "(未生成)")
    info_table.add_row("创建时间",   str(project.created_at)[:19])
    info_table.add_row("更新时间",   str(project.updated_at)[:19])
    console.print(Panel(info_table, title="[bold cyan]📁 项目信息[/bold cyan]",
                        border_style="cyan"))

    # ── 统计摘要 ──────────────────────────────────────
    stat_table = Table(show_header=False, box=None, padding=(0, 3))
    stat_table.add_column("k", style="bold yellow", width=16)
    stat_table.add_column("v", style="white")
    stat_table.add_row("原始需求数",   str(stats["raw_req_count"]))
    stat_table.add_row("功能需求数",   str(stats["func_req_count"]))
    stat_table.add_row("已生成代码",   f"{stats['generated_count']} / {stats['func_req_count']}")
    stat_table.add_row("功能模块数",   str(stats["module_count"]))
    stat_table.add_row("代码文件数",   str(stats["code_file_count"]))
    console.print(Panel(stat_table, title="[bold yellow]📊 统计摘要[/bold yellow]",
                        border_style="yellow"))

    # ── 原始需求列表 ──────────────────────────────────
    if raw_reqs:
        raw_table = Table(title="📝 原始需求", show_lines=True)
        raw_table.add_column("ID",     style="dim",   width=5)
        raw_table.add_column("来源",   style="cyan",  width=8)
        raw_table.add_column("文件名",                width=20)
        raw_table.add_column("内容摘要",              width=55)
        raw_table.add_column("创建时间",              width=20)
        for rr in raw_reqs:
            raw_table.add_row(
                str(rr.id),
                rr.source_type,
                rr.source_name or "-",
                (rr.content[:80] + "...") if len(rr.content) > 80 else rr.content,
                str(rr.created_at)[:19],
            )
        console.print(raw_table)

    # ── 需求-模块-代码 关系树 ─────────────────────────
    if not modules:
        console.print("[dim]暂无功能需求[/dim]")
        return

    priority_color = {"high": "red", "medium": "yellow", "low": "green"}
    status_icon    = {"generated": "✅", "pending": "⏳", "failed": "❌"}

    root = Tree(
        f"[bold cyan]🗂  {project.name}[/bold cyan]  "
        f"[dim]({stats['func_req_count']} 需求 · "
        f"{stats['module_count']} 模块 · "
        f"{stats['code_file_count']} 代码文件)[/dim]"
    )

    for module_name in sorted(modules.keys()):
        mod_data  = modules[module_name]
        req_list  = mod_data["requirements"]
        mod_count = len(req_list)
        gen_count = sum(1 for r in req_list if r["req"].status == "generated")

        mod_branch = root.add(
            f"[magenta bold]📦 {module_name}[/magenta bold]  "
            f"[dim]{gen_count}/{mod_count} 已生成[/dim]"
        )

        for item in req_list:
            req        = item["req"]
            code_files = item["code_files"]
            p_color    = priority_color.get(req.priority, "white")
            s_icon     = status_icon.get(req.status, "❓")

            req_label = (
                f"{s_icon} [bold]{req.title}[/bold]  "
                f"[{p_color}][{req.priority}][/{p_color}]  "
                f"[dim]REQ.{req.index_no:02d} · ID={req.id}[/dim]"
            )
            req_branch = mod_branch.add(req_label)

            # 需求详情子节点
            req_branch.add(
                f"[dim]函数名:  [/dim][code]{req.function_name}[/code]"
            )
            req_branch.add(
                f"[dim]描述:    [/dim]{req.description[:80]}"
                + ("..." if len(req.description) > 80 else "")
            )

            # 代码文件子节点
            if code_files:
                code_branch = req_branch.add("[green]📄 代码文件[/green]")
                for cf in code_files:
                    exists  = os.path.exists(cf.file_path)
                    icon    = "🟢" if exists else "🔴"
                    cf_text = Text()
                    cf_text.append(f"{icon} ", style="")
                    cf_text.append(cf.file_name, style="bold green" if exists else "bold red")
                    cf_text.append(f"  [{cf.language}]", style="dim")
                    cf_text.append(f"  {cf.file_path}", style="dim italic")
                    code_branch.add(cf_text)
            else:
                req_branch.add("[dim]📄 暂无代码文件[/dim]")

    console.print(Panel(root, title="[bold green]🔗 需求 · 模块 · 代码 关系树[/bold green]",
                        border_style="green", padding=(1, 2)))


def render_project_list(projects: list, stats_map: Dict[int, Dict], console) -> None:
    """
    渲染所有项目列表（含统计列）。

    Args:
        projects:  Project 对象列表
        stats_map: {project_id: stats_dict}
        console:   rich.console.Console 实例
    """
    from rich.table import Table

    if not projects:
        console.print("[dim]暂无项目，请先运行 `python main.py run` 创建项目。[/dim]")
        return

    table = Table(title=f"📋 项目列表（共 {len(projects)} 个）", show_lines=True)
    table.add_column("ID",       style="cyan bold",    width=5)
    table.add_column("项目名称", style="bold",         width=22)
    table.add_column("语言",     style="magenta",      width=8)
    table.add_column("功能需求", style="yellow",       width=8)
    table.add_column("已生成",   style="green",        width=8)
    table.add_column("模块数",                         width=6)
    table.add_column("代码文件",                       width=8)
    table.add_column("描述",                           width=28)
    table.add_column("创建时间",                       width=20)

    for p in projects:
        st = stats_map.get(p.id, {})
        func_total = st.get("func_req_count", 0)
        gen_count  = st.get("generated_count", 0)
        gen_cell   = (
            f"[green]{gen_count}[/green]"
            if gen_count == func_total and func_total > 0
            else f"[yellow]{gen_count}[/yellow]"
        )
        table.add_row(
            str(p.id),
            p.name,
            p.language,
            str(func_total),
            gen_cell,
            str(st.get("module_count", 0)),
            str(st.get("code_file_count", 0)),
            (p.description[:28] + "...") if p.description and len(p.description) > 28
            else (p.description or "[dim](无)[/dim]"),
            str(p.created_at)[:19],
        )

    console.print(table)