from __future__ import annotations

from review_agent.models import ApplicationFormFillBatch, ExportedSummaryFile


def build_assistant_summary(batch: ApplicationFormFillBatch, exports: list[ExportedSummaryFile]) -> str:
    word_exports = [export for export in exports if export.export_type == ExportedSummaryFile.ExportType.WORD]
    trace_exports = [
        export
        for export in exports
        if export.export_type in {ExportedSummaryFile.ExportType.EXCEL, ExportedSummaryFile.ExportType.JSON}
    ]
    lines = ["已生成申报模板自动填表文件。", "", "| 文件 | Word | PDF |", "| --- | --- | --- |"]
    if word_exports:
        for export in word_exports:
            lines.append(f"| {export.file_name} | [下载](/api/review-agent/file-summary/exports/{export.pk}/download/) | 待增强 |")
    else:
        lines.append("| 自动填表结果 | 未生成 | 待增强 |")

    conflicts = batch.conflict_summary or []
    if conflicts:
        lines.extend(["", "| 冲突字段 | 采用值 | 冲突来源 | 处理 |", "| --- | --- | --- | --- |"])
        for item in conflicts:
            conflict_sources = "；".join(
                f"{_compact_table_text(value.get('source_file', ''))}：{_compact_table_text(value.get('value', ''))}"
                for value in item.get("conflict_values", [])
            )
            lines.append(
                f"| {_compact_table_text(item.get('field_label', item.get('field_key', '')))} | {_compact_table_text(item.get('selected_value', ''))} | {_compact_table_text(conflict_sources or '-')} | {_compact_table_text(item.get('handling', ''))} |"
            )

    if trace_exports:
        lines.append("")
        for export in trace_exports:
            lines.append(f"[下载{export.file_name}](/api/review-agent/file-summary/exports/{export.pk}/download/)")
    return "\n".join(lines).strip()


def _compact_table_text(value: object, *, limit: int = 80) -> str:
    text = " ".join(str(value or "").replace("|", " ").split())
    if len(text) <= limit:
        return text
    return f"{text[:limit]}..."