import assert from "node:assert/strict";
import { readFile } from "node:fs/promises";
import test from "node:test";
import {
  DEFAULT_COLLECTION_DAYS,
  effectiveCollectionDays,
  isCollectionScheduleDue,
  parseCollectionDays,
  runDueScheduledCollections,
} from "../lib/collection-service.ts";
import { sortWithNullsLast } from "../lib/sort-utils.ts";

test("runs the Beijing collection schedule from 09:00", () => {
  const scheduledDate = "2026-08-12";
  assert.equal(
    isCollectionScheduleDue(
      scheduledDate,
      Date.parse("2026-08-12T00:59:59Z"),
    ),
    false,
  );
  assert.equal(
    isCollectionScheduleDue(
      scheduledDate,
      Date.parse("2026-08-12T01:00:00Z"),
    ),
    true,
  );
  assert.equal(
    isCollectionScheduleDue(
      scheduledDate,
      Date.parse("2026-08-13T00:00:00Z"),
    ),
    true,
  );
  assert.equal(
    isCollectionScheduleDue(
      scheduledDate,
      Date.parse("2026-08-11T16:00:00Z"),
    ),
    false,
  );
});

test("sorts both directions while keeping missing values last", () => {
  const values = [
    { id: "missing-a", value: null },
    { id: "middle", value: 20 },
    { id: "high", value: 50 },
    { id: "missing-b", value: null },
    { id: "low", value: 10 },
  ];
  assert.deepEqual(
    sortWithNullsLast(values, (item) => item.value, "asc").map(
      (item) => item.id,
    ),
    ["low", "middle", "high", "missing-a", "missing-b"],
  );
  assert.deepEqual(
    sortWithNullsLast(values, (item) => item.value, "desc").map(
      (item) => item.id,
    ),
    ["high", "middle", "low", "missing-a", "missing-b"],
  );
});

test("a failed collection keeps historically successful rows on success", async () => {
  const source = await readFile(
    new URL("../lib/collection-service.ts", import.meta.url),
    "utf8",
  );

  // 失败写入必须按 latest_likes 分流：无数据 → failed；
  // 已有历史数据 → 保持 success，仅描述里说明沿用上次数据。
  assert.match(
    source,
    /collection_status = CASE\s+WHEN latest_likes IS NULL THEN 'failed'\s+ELSE 'success'\s+END/,
  );
  assert.match(
    source,
    /ELSE \?\s+END,\s+collection_updated_at = CASE\s+WHEN latest_likes IS NULL THEN CURRENT_TIMESTAMP\s+ELSE collection_updated_at/,
  );
  assert.match(source, /`\$\{message\}，沿用上次采集数据`/);
  // run 行照实记录失败，保留可观测性
  assert.match(source, /UPDATE collection_runs\s+SET status = 'failed'/);
});

// —— 未设置采集计划时默认连采 7 天 ——

test("effective collection days fall back to 7 days when unset", () => {
  assert.deepEqual(effectiveCollectionDays(null), [1, 2, 3, 4, 5, 6, 7]);
  assert.deepEqual(effectiveCollectionDays("[]"), DEFAULT_COLLECTION_DAYS);
  assert.deepEqual(effectiveCollectionDays('{"bad":1}'), DEFAULT_COLLECTION_DAYS);
  assert.deepEqual(effectiveCollectionDays("[0,9]"), DEFAULT_COLLECTION_DAYS);
  assert.deepEqual(effectiveCollectionDays("[3,1,2,2]"), [1, 2, 3]);
  assert.deepEqual(parseCollectionDays("[7,2]"), [2, 7]);
});

function fakeSchedulerDb({ tasks = [], published = [] } = {}) {
  const executed = [];
  const record = (sql, values) => executed.push({ sql, values });
  const db = {
    prepare(sql) {
      return {
        bind(...values) {
          return {
            async first() {
              record(sql, values);
              return null;
            },
            async run() {
              record(sql, values);
              return { meta: { changes: 0 } };
            },
            async all() {
              record(sql, values);
              if (/FROM tasks/.test(sql)) {
                const scoped = tasks.filter(
                  (task) => !values[0] || task.id === values[0],
                );
                return {
                  results: scoped.filter(
                    (task) =>
                      (task.task_type ?? "content_publish") !==
                      "screenshot_collect",
                  ),
                };
              }
              if (/COALESCE\(d\.publish_time, d\.claimed_at\)/.test(sql)) {
                return {
                  results: published.filter((row) => row.task_id === values[0]),
                };
              }
              // 无待采集行，避免触发真实 MCP 采集
              return { results: [] };
            },
          };
        },
      };
    },
    async batch() {
      return [];
    },
  };
  return { db, executed };
}

test("collects unplanned tasks on the default 7-day schedule from publish date", async () => {
  const { db, executed } = fakeSchedulerDb({
    tasks: [
      {
        id: "task-a",
        task_type: "content_publish",
        collection_start_date: null,
        collection_days: "[]",
      },
    ],
    published: [
      // UTC 2026-10-09 01:30 → 上海 2026-10-09，D1–D4 在 10-12 09:00 前到期
      { id: "dist-a", task_id: "task-a", publish_anchor: "2026-10-09 01:30:00" },
    ],
  });
  const summary = await runDueScheduledCollections(
    db,
    Date.parse("2026-10-12T01:00:00Z"),
    {},
  );
  assert.equal(summary.dueTasks, 4);
  const anchorQuery = executed.find((entry) =>
    /COALESCE\(d\.publish_time/.test(entry.sql),
  );
  assert.ok(anchorQuery, "未设置计划时应查询每篇的发布时间");
  assert.equal(anchorQuery.values[0], "task-a");
  const scoped = executed.filter((entry) =>
    /SELECT d\.id FROM distributions d/.test(entry.sql),
  );
  assert.equal(scoped.length, 4);
  assert.ok(scoped.every((entry) => entry.values.includes("dist-a")));
});

test("skips the default window once 7 days have passed since publish", async () => {
  const { db, executed } = fakeSchedulerDb({
    tasks: [
      {
        id: "task-old",
        task_type: "content_publish",
        collection_start_date: null,
        collection_days: "[]",
      },
    ],
    published: [
      { id: "dist-old", task_id: "task-old", publish_anchor: "2026-09-01 00:00:00" },
    ],
  });
  const summary = await runDueScheduledCollections(
    db,
    Date.parse("2026-10-12T01:00:00Z"),
    {},
  );
  assert.equal(summary.dueTasks, 0);
  assert.ok(
    !executed.some((entry) =>
      /SELECT d\.id FROM distributions d/.test(entry.sql),
    ),
  );
});

test("keeps the explicit task-level schedule when a plan is saved", async () => {
  const { db, executed } = fakeSchedulerDb({
    tasks: [
      {
        id: "task-b",
        task_type: "content_publish",
        collection_start_date: "2026-10-10",
        collection_days: "[2]",
      },
    ],
  });
  const summary = await runDueScheduledCollections(
    db,
    Date.parse("2026-10-12T01:00:00Z"),
    {},
  );
  assert.equal(summary.dueTasks, 1);
  const needing = executed.filter((entry) =>
    /SELECT d\.id FROM distributions d/.test(entry.sql),
  );
  assert.deepEqual(needing.map((entry) => entry.values), [
    ["task-b", "2026-10-11"],
  ]);
  assert.ok(
    !executed.some((entry) => /COALESCE\(d\.publish_time/.test(entry.sql)),
  );
});

test("ignores screenshot collection tasks in the scheduler", async () => {
  const { db, executed } = fakeSchedulerDb({
    tasks: [
      {
        id: "task-shot",
        task_type: "screenshot_collect",
        collection_start_date: null,
        collection_days: "[]",
      },
    ],
    published: [
      { id: "dist-shot", task_id: "task-shot", publish_anchor: "2026-10-11 00:00:00" },
    ],
  });
  const summary = await runDueScheduledCollections(
    db,
    Date.parse("2026-10-12T01:00:00Z"),
    {},
  );
  assert.equal(summary.dueTasks, 0);
  assert.ok(
    !executed.some((entry) => /COALESCE\(d\.publish_time/.test(entry.sql)),
  );
});