/* =============================================================================
 * 「프로젝트」 탭(92장) — 프로젝트 표(찾기 · 거르기 · 쪽 넘김) + 진행 현황 + 임시 보관함.
 * ========================================================================== */

import { ROUTES } from "@config/config_frontend";
import {
  createButton,
  createInputField,
  createSelectField,
  createTag,
  type TagVariant,
} from "@ui/ui_template_elements";
import { section, text } from "@ui/ui_template_general_blocks";
import { workflowSteps } from "../A00_Common/b_page_scaffold";
import { currentQuery, navigateTo } from "../A00_Common/router";
import type { ProjectItem, WorkflowStageState } from "./B01_Dashboard_Api_Fetch";
import { formatDate, formatTime, L, stackedCell } from "./B01_Dashboard_UI_Common";
import { createPagedTable } from "./B01_Dashboard_UI_Paging";
import type { DashboardState } from "./B01_Dashboard_UI_Page";
import { projectHeaders, projectRow } from "./B01_Dashboard_UI_Projects";
import {
  matchesFilter,
  matchesQuery,
  parseFilter,
  progressStage,
  STEP_COUNT,
  type ProjectFilter,
} from "./B01_Dashboard_UI_ProjectStats";
import { buildTempUploadSection } from "./B01_Dashboard_UI_TempUpload";

const STATE_TAG: Record<WorkflowStageState["state"], TagVariant> = {
  NOT_STARTED: "neutral",
  IN_PROGRESS: "accent",
  COMPLETE: "success",
  FAILED: "danger",
  STALE: "warning",
};

function filterOptions(): { value: string; text: string }[] {
  const steps = workflowSteps();
  return [
    { value: "all", text: L("B01_Pj_FilterAll") },
    { value: "failed", text: L("B01_Ov_Failed") },
    { value: "stale", text: L("B01_Ov_Stale") },
    ...Array.from({ length: STEP_COUNT }, (_, i) => ({
      value: `stage-${i}`,
      text: `${L("B01_Pj_Stage")} · ${steps[i]}`,
    })),
  ];
}

function progressRow(project: ProjectItem): HTMLElement[] {
  const stage = progressStage(project);
  if (!stage)
    return [
      text(project.name),
      text(null),
      text(null),
      text(null),
      text(null),
      text(null),
      text(null),
    ];
  const when = (value?: string | null): HTMLElement =>
    value ? stackedCell(formatDate(value), formatTime(value)) : text(null);
  return [
    text(project.name),
    text(workflowSteps()[stage.stage_no] ?? stage.stage_key),
    createTag(L(`B01_Pj_State_${stage.state}`), STATE_TAG[stage.state]),
    text(`${Math.round(stage.progress_percent)}%`),
    text(stage.message),
    when(stage.started_at),
    when(stage.completed_at),
  ];
}

function progressHeaders(): string[] {
  return [
    L("B01_Dashboard_Table_Project"),
    L("B01_Pj_Stage"),
    L("B01_Pj_State"),
    L("B01_Pj_Percent"),
    L("B01_Pj_Message"),
    L("B01_Pj_Started"),
    L("B01_Pj_Done"),
  ];
}

/** `projects` = 역할별 프로젝트 목록 · 거르기 처음 값은 해시 `filter=`(개요에서 눌러 올 때) */
export function buildProjectsTab(state: DashboardState, projects: ProjectItem[]): HTMLElement[] {
  const user = state.user;
  const list = createPagedTable(
    projectHeaders(),
    (p: ProjectItem) => projectRow(p, user),
    projects,
  );
  const progress = createPagedTable(progressHeaders(), progressRow, projects);

  let filter: ProjectFilter = parseFilter(currentQuery().get("filter"));
  const query = createInputField({
    label: L("B01_Pj_Search"),
    placeholder: L("B01_Pj_SearchHint"),
  });
  const filterField = createSelectField({
    label: L("B01_Pj_Filter"),
    options: filterOptions(),
    value: filter,
    onChange: (value) => {
      filter = parseFilter(value);
      apply();
    },
  });
  function apply(): void {
    const shown = projects.filter(
      (p) => matchesFilter(p, filter) && matchesQuery(p, query.input.value),
    );
    list.setItems(shown);
    progress.setItems(shown);
  }
  query.input.addEventListener("input", apply);
  apply();

  const filters = document.createElement("div");
  filters.className = "b01-dashboard__filters";
  filters.append(query.root, filterField.root);
  const body = document.createElement("div");
  body.append(filters, list.root);

  return [
    section(L("B01_Dashboard_Projects"), body, true, [
      createButton({ label: "+", onClick: () => navigateTo(ROUTES.B02_PROJ_REGISTER) }),
    ]),
    section(L("B01_Pj_Progress"), progress.root, true),
    buildTempUploadSection(),
  ];
}