import type { Job } from "../../../adapters/database/store.js";
import { createIssueSnapshot } from "../../../adapters/gitea/issues.js";
import {
    marker,
    planReadyLabel,
    protocolVersion,
} from "../../../core/contracts.js";
import {
    type PublicationContext,
    type PublicationOutcome,
    upsertJobStatus,
} from "../status.js";

export async function publishPlan(
    context: PublicationContext,
    job: Job,
): Promise<PublicationOutcome> {
    const plan = job.result?.plan;
    if (!plan) throw new Error("Successful planning job has no plan");
    const [issue, comments, repository] = await Promise.all([
        context.client.getIssue(job.issueNumber),
        context.client.getComments(job.issueNumber),
        context.client.getRepository(),
    ]);
    const snapshot = createIssueSnapshot(issue, comments, context.botLogin);
    const base = await context.client.getBranch(repository.default_branch);
    if (
        snapshot.digest !== plan.issueDigest ||
        base?.commit.id !== plan.baseSha
    ) {
        throw new Error(
            "Issue or default branch changed while planning; the result is stale",
        );
    }
    const planMarker = {
        v: protocolVersion,
        kind: "plan" as const,
        issue: job.issueNumber,
        status: "accepted",
        issueDigest: plan.issueDigest,
        baseSha: plan.baseSha,
        planDigest: plan.planDigest,
    };
    const body = `${marker(planMarker)}\n## Accepted implementation plan\n\n${plan.markdown}\n\n<!-- gitea-agent:plan-footer -->\n\n**Summary:** ${plan.summary}\n\nBase: \`${plan.baseSha.slice(0, 12)}\` | Review iterations: ${plan.iterations} | Plan digest: \`${plan.planDigest.slice(0, 12)}\``;
    const comment = await context.client.upsertMarkedComment(
        job.issueNumber,
        context.botLogin,
        planMarker,
        body,
    );
    await context.client.addLabelIfPresent(job.issueNumber, planReadyLabel);
    await upsertJobStatus(
        context.client,
        context.botLogin,
        job,
        "Agent plan accepted",
        `The accepted plan was published after ${plan.iterations} review iteration(s).`,
    );
    return { terminal: "succeeded", planCommentId: comment.id };
}