const test = require('node:test');
const assert = require('node:assert/strict');

const { refreshApiSource, refreshRssFeed } = require('../src/web/lib/data-source-refresh');

function createConnection(options) {
  const state = Object.assign({
    rssItemSnapshots: [],
    slideRows: [],
    screenRows: []
  }, options || {});
  const calls = [];

  return {
    calls,
    async beginTransaction() {
      calls.push(['beginTransaction']);
    },
    async commit() {
      calls.push(['commit']);
    },
    async rollback() {
      calls.push(['rollback']);
    },
    release() {
      calls.push(['release']);
    },
    async query(sql, params) {
      calls.push(['query', sql, params]);

      if (sql.includes('SELECT item_json')) {
        return [state.rssItemSnapshots.map(function (itemJson) {
          return { item_json: itemJson };
        })];
      }

      if (sql.includes('SELECT id, content_json FROM c_slides')) {
        return [state.slideRows];
      }

      if (sql.includes('SELECT DISTINCT s.slug')) {
        return [state.screenRows];
      }

      return [[]];
    }
  };
}

test('refreshApiSource notifies players only when the API snapshot changes', async () => {
  const connection = createConnection({
    slideRows: [{ id: 10, content_json: JSON.stringify({ source_id: 7 }) }],
    screenRows: [{ slug: 'screen-a' }]
  });
  const notifyCalls = [];
  const pool = {
    async getConnection() {
      return connection;
    }
  };
  const common = {
    async fetchApiSourceResponse() {
      return {
        responseJson: JSON.stringify({ value: 'new' }, null, 2),
        responseStatus: 200,
        responseContentType: 'application/json'
      };
    },
    parseJsonSafe(value) {
      return JSON.parse(value);
    }
  };

  await refreshApiSource(pool, common, {
    id: 7,
    last_response_json: JSON.stringify({ value: 'old' }, null, 2)
  }, 42, async function (slugs, payload) {
    notifyCalls.push({ slugs, payload });
  });

  assert.deepEqual(notifyCalls, [{ slugs: ['screen-a'], payload: 'refresh' }]);
});

test('refreshApiSource skips notifications when the API snapshot is unchanged', async () => {
  const connection = createConnection({
    slideRows: [{ id: 10, content_json: JSON.stringify({ source_id: 7 }) }],
    screenRows: [{ slug: 'screen-a' }]
  });
  const notifyCalls = [];
  const pool = {
    async getConnection() {
      return connection;
    }
  };
  const snapshot = JSON.stringify({ value: 'same' }, null, 2);
  const common = {
    async fetchApiSourceResponse() {
      return {
        responseJson: snapshot,
        responseStatus: 200,
        responseContentType: 'application/json'
      };
    },
    parseJsonSafe(value) {
      return JSON.parse(value);
    }
  };

  await refreshApiSource(pool, common, {
    id: 7,
    last_response_json: snapshot
  }, 42, async function (slugs, payload) {
    notifyCalls.push({ slugs, payload });
  });

  assert.deepEqual(notifyCalls, []);
});

test('refreshRssFeed notifies players only when the RSS items change', async () => {
  const connection = createConnection({
    rssItemSnapshots: [JSON.stringify({ title: 'Old item' })],
    slideRows: [{ id: 11, content_json: JSON.stringify({ feed_id: 9 }) }],
    screenRows: [{ slug: 'screen-b' }]
  });
  const notifyCalls = [];
  const pool = {
    async getConnection() {
      return connection;
    }
  };
  const common = {
    async fetchRssFeedItems() {
      return [{ title: 'New item' }];
    },
    async replaceRssFeedItems() {
      return 1;
    },
    parseJsonSafe(value) {
      return JSON.parse(value);
    }
  };

  await refreshRssFeed(pool, common, 9, 'https://example.com/feed.xml', 10, 42, async function (slugs, payload) {
    notifyCalls.push({ slugs, payload });
  });

  assert.deepEqual(notifyCalls, [{ slugs: ['screen-b'], payload: 'refresh' }]);
});

test('refreshRssFeed skips notifications when the RSS items are unchanged', async () => {
  const snapshot = JSON.stringify({ title: 'Same item' });
  const connection = createConnection({
    rssItemSnapshots: [snapshot],
    slideRows: [{ id: 11, content_json: JSON.stringify({ feed_id: 9 }) }],
    screenRows: [{ slug: 'screen-b' }]
  });
  const notifyCalls = [];
  const pool = {
    async getConnection() {
      return connection;
    }
  };
  const common = {
    async fetchRssFeedItems() {
      return [{ title: 'Same item' }];
    },
    async replaceRssFeedItems() {
      return 1;
    },
    parseJsonSafe(value) {
      return JSON.parse(value);
    }
  };

  await refreshRssFeed(pool, common, 9, 'https://example.com/feed.xml', 10, 42, async function (slugs, payload) {
    notifyCalls.push({ slugs, payload });
  });

  assert.deepEqual(notifyCalls, []);
});