import { asanaRequest } from './client.ts'
import { mapTask, TASK_FIELDS } from './models.ts'
import type {
	AsanaAuthInput,
	AsanaTaskSummary,
	DryRunResult,
	JsonRecord,
} from './types.ts'
import {
	compactRecord,
	optionalBoolean,
	optionalString,
	requireRecord,
	requireString,
} from './types.ts'
import { requireAuthMode } from './auth.ts'

export type UpdateTaskInput = AsanaAuthInput & {
	/** Task GID. */
	gid: string
	name?: string
	notes?: string
	assignee?: string
	dueOn?: string
	dueAt?: string
	completed?: boolean
	confirm?: boolean
	dryRun?: boolean
}

function taskUpdatePayload(input: UpdateTaskInput): JsonRecord {
	const payload = compactRecord({
		name: optionalString(input.name, 'name'),
		notes: optionalString(input.notes, 'notes'),
		assignee: optionalString(input.assignee, 'assignee'),
		due_on: optionalString(input.dueOn, 'dueOn'),
		due_at: optionalString(input.dueAt, 'dueAt'),
		completed: optionalBoolean(input.completed, 'completed'),
	})
	if (Object.keys(payload).length === 0) {
		throw new Error('update-task requires at least one field to change.')
	}
	return payload
}

/**
 * Update an Asana task. Requires `confirm: true`, or use `dryRun: true`.
 * Needs `tasks:write`.
 * @example
 * import updateTask from 'kody:@kody/asana/update-task'
 * const preview = await updateTask({
 *   gid: '123',
 *   completed: true,
 *   dryRun: true,
 * })
 */
export async function updateTask(
	input: UpdateTaskInput,
): Promise<
	AsanaTaskSummary | DryRunResult<{ method: string; path: string; data: JsonRecord }>
> {
	const gid = requireString(input.gid, 'gid')
	const payload = taskUpdatePayload(input)
	const path = `/tasks/${encodeURIComponent(gid)}`
	if (input.dryRun) {
		return { dryRun: true, wouldCall: { method: 'PUT', path, data: payload } }
	}
	if (input.confirm !== true) {
		throw new Error(
			'Updating an Asana task requires confirm: true after explicit user approval, or dryRun: true.',
		)
	}

	const result = await asanaRequest<unknown>({
		...input,
		operation: 'tasks.write',
		method: 'PUT',
		path,
		query: { opt_fields: TASK_FIELDS },
		body: payload,
	})
	if (!result.data) throw new Error('Asana update task did not return a task.')
	return mapTask(result.data)
}

/**
 * Update an Asana task. Requires `confirm: true`, or use `dryRun: true`.
 * @example
 * import updateTask from 'kody:@kody/asana/update-task'
 * const preview = await updateTask({ gid: '123', name: 'Renamed', dryRun: true })
 */
export default async function updateTaskEntrypoint(
	params: Partial<UpdateTaskInput> & Record<string, unknown> = {},
) {
	const input = requireRecord(params, 'update-task')
	return updateTask({
		gid: requireString(input.gid, 'gid'),
		name: optionalString(input.name, 'name'),
		notes: optionalString(input.notes, 'notes'),
		assignee: optionalString(input.assignee, 'assignee'),
		dueOn: optionalString(input.dueOn, 'dueOn'),
		dueAt: optionalString(input.dueAt, 'dueAt'),
		completed: optionalBoolean(input.completed, 'completed'),
		integrationName: optionalString(input.integrationName, 'integrationName'),
		integration: optionalString(input.integration, 'integration'),
		account: optionalString(input.account, 'account'),
		secretName: optionalString(input.secretName, 'secretName'),
		auth: requireAuthMode(input.auth),
		confirm: optionalBoolean(input.confirm, 'confirm'),
		dryRun: optionalBoolean(input.dryRun, 'dryRun'),
	})
}