#!/usr/bin/env node

import * as defaultConfig from "./defaults.js"
import { getConfig, processTask } from "./lib.js"
import { performance } from "node:perf_hooks"
import { getLogger } from "./logging.js"
const startTime = performance.now()
const { opts, tasks } = await getConfig() || { ...defaultConfig }
const log = getLogger(opts.logLevel, "main")
log.info(`Processing ${tasks.length} steps`)
log.debug(`Running directory: ${opts.runDir}`)
log.debug(`Output directory: ${opts.outDir}`)
if (opts.cacheDir) {
  log.debug(`Cache directory: ${opts.cacheDir}`)
} else {
  log.warn("Cache disabled")
}

const taskRunner = tasks.reduce(
  async (metaPromise, step) => {
    const tasks = Array.isArray(step) ? step : [step]
    const { meta, filesWritten } = await metaPromise
    const stepTasks = tasks.map(task => task.name)
    log.info(`Starting tasks: ${stepTasks.join(", ")}`)
    const stepResults = await Promise.all(tasks.map(async task => {
      const log = getLogger(opts.logLevel, task.name)
      const taskResult = await processTask(meta, task)
      log.trace(`taskResult: ${JSON.stringify(taskResult)}`)
      return taskResult
    }))
    const newState = stepResults.reduce((newState, taskResult) => {
      const resources = Object.keys(taskResult.resources).length > 0 ? {
        ...newState.meta.resources,
        [taskResult.name]: taskResult.resources,
      } : { ...newState.meta.resources }
      return {
        meta: {
          ...newState.meta,
          resources,
        },
        filesWritten: newState.filesWritten + taskResult.filesWritten,
      }
    }, { meta, filesWritten })
    return newState
  },
  Promise.resolve({ meta: { opts }, filesWritten: 0 }),
)
const finalState = await taskRunner
log.trace(`Final state: ${JSON.stringify(finalState, null, 2)}`)
const endTime = performance.now()
const timeTaken = (endTime - startTime)
const hrTime = timeTaken > 1000 ? `${Number.parseFloat(timeTaken / 1000).toFixed(2)}s` : `${Number.parseFloat(timeTaken).toFixed(2)}ms`
log.info(`Completed ${tasks.length} steps in ${hrTime}, wrote ${finalState.filesWritten} files.`)