import {
    CLEAN_GRAPH,
    FINDING_INDENT,
    NO_GRAPHS,
    NO_INVENTORY,
    NO_SEEDS,
    UNTAUGHT_HEAD,
} from "#configuration/strings/derivation.strings";
import {
    GRAPHS_VALIDATED,
    GROUNDING_SUMMARY,
    GROUNDING_UNASSESSED_HEAD,
    PAGES_SUFFIX,
    PAYLOAD_MISSING,
} from "#configuration/strings/coverage.strings";
import type { GraphContext, GraphFinding } from "#types/coverage.types";
import {
    conceptsTaughtAcross,
    taughtAcross,
    untaughtOf,
    validateGraph,
    validateUnion,
} from "#core/validators/coverage.validator";
import { conclude, refuse, say } from "#core/reporters/derivation.reporter";
import { inventoryTarget, readInventory } from "#core/loaders/inventory.loader";
import { panelCount, validatePanels } from "#core/validators/panel.validator";
import { readSeeds, seedsTarget } from "#core/loaders/seed.loader";
import { COVERAGE_COMMAND } from "#configuration/constants/contract.constants";
import { COVERAGE_SUMMARY } from "#configuration/strings/contract.strings";
import { EVIDENCE } from "@banes-lab/web/configuration/constants/evidence.source.constants.ts";
import { EVIDENCE_ABSENT } from "#configuration/constants/evidence.constants";
import type { Finding } from "#types/derivation.types";
import { PANELS_VALIDATED } from "#configuration/strings/panel.strings";
import { groundingOf } from "#core/validators/evidence.validator";
import { loadContentGraphs } from "#core/loaders/coverage.loader";
import { readPagePayload } from "#core/loaders/payload.loader";
import { readPanelSections } from "#core/loaders/panel.loader";
import { resolveArgv } from "@govlab/argv";

resolveArgv({ command: COVERAGE_COMMAND, flags: [], summary: COVERAGE_SUMMARY });

const SECTION_MARK = "#";

const inventory = readInventory();
if (inventory === null) {
    refuse(`${NO_INVENTORY}${inventoryTarget()}`);
}
const seeds = readSeeds();
if (seeds === null) {
    refuse(`${NO_SEEDS}${seedsTarget()}`);
}

const graphs = await loadContentGraphs();
if (graphs.length === 0) {
    say(NO_GRAPHS);
}

const asFinding = function asFinding(held: GraphFinding): Finding {
    return { file: held.page + SECTION_MARK + held.section, message: held.message };
};

const known = new Set([...inventory.records.map((record) => record.slug), ...seeds.seeds.map((seed) => seed.id)]);
const payloadSections = new Map<string, readonly string[]>();
const findings: Finding[] = [];
for (const graph of graphs) {
    const payload = readPagePayload(graph.page);
    if (payload === null) {
        findings.push({ file: graph.page, message: `${PAYLOAD_MISSING}${graph.page}` });
        continue;
    }
    payloadSections.set(graph.page, payload.sections);
}
const context: GraphContext = { known, payloadSections, taught: taughtAcross(graphs) };
const graphFindings: GraphFinding[] = [
    ...graphs.flatMap((graph) => validateGraph(graph, context)),
    ...validateUnion(graphs),
    ...conceptsTaughtAcross(graphs),
];
const reported = new Set<string>();
for (const held of graphFindings) {
    const key = held.page + SECTION_MARK + held.section + held.message;
    if (!reported.has(key)) {
        reported.add(key);
        findings.push(asFinding(held));
    }
}

const grounding = groundingOf(graphs, EVIDENCE, EVIDENCE_ABSENT);
findings.push(...grounding.findings.map(asFinding));
say(
    `${GROUNDING_SUMMARY}${String(grounding.grounded.length)}, ${String(grounding.absent.length)}, ${String(grounding.unassessed.length)}`,
);
if (grounding.unassessed.length > 0) {
    say(GROUNDING_UNASSESSED_HEAD);
    for (const node of grounding.unassessed) {
        say(`${FINDING_INDENT}${node}`);
    }
}

let panels = 0;
for (const graph of graphs) {
    const sections = readPanelSections(graph.page) ?? [];
    panels += panelCount(sections);
    findings.push(...validatePanels(graph.page, sections).map(asFinding));
}
say(`${String(panels)}${PANELS_VALIDATED}${String(graphs.length)}${PAGES_SUFFIX}`);

const untaught = untaughtOf(
    graphs,
    inventory.records.map((record) => record.slug),
);
if (untaught.length > 0) {
    say(UNTAUGHT_HEAD);
    for (const slug of untaught) {
        say(`${FINDING_INDENT}${slug}`);
    }
}
say(`${String(graphs.length)}${GRAPHS_VALIDATED}${String(payloadSections.size)}${PAGES_SUFFIX}`);
conclude(COVERAGE_COMMAND, findings, CLEAN_GRAPH);