// Vitest unit coverage for the pure `applyOrderOverlay` projection.
// Phase 14 introduced the overlay for `planetRename`; Phase 15
// extends it to `setProductionType` and shares the same eligibility
// rule. Future phases (route updates, etc.) will extend the overlay
// and need equivalent cases here.

import { describe, expect, test } from "vitest";

import {
	applyOrderOverlay,
	productionDisplayFromCommand,
	type GameReport,
	type ReportPlanet,
} from "../src/api/game-state";
import type {
	CommandStatus,
	OrderCommand,
	ProductionType,
} from "../src/sync/order-types";

function makePlanet(overrides: Partial<ReportPlanet>): ReportPlanet {
	return {
		number: 0,
		name: "",
		x: 0,
		y: 0,
		kind: "local",
		owner: null,
		size: null,
		resources: null,
		industryStockpile: null,
		materialsStockpile: null,
		industry: null,
		population: null,
		colonists: null,
		production: null,
		freeIndustry: null,
		...overrides,
	};
}

function makeReport(planets: ReportPlanet[]): GameReport {
	return {
		turn: 4,
		mapWidth: 4000,
		mapHeight: 4000,
		planetCount: planets.length,
		planets,
		race: "",
		localShipClass: [],
	};
}

describe("applyOrderOverlay", () => {
	test("returns the same report when no commands match", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const out = applyOrderOverlay(report, [], {});
		expect(out).toBe(report);
	});

	test("renames a planet on applied commands", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth" }),
			makePlanet({ number: 2, name: "Mars" }),
		]);
		const cmd: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 1,
			name: "New Earth",
		};
		const statuses: Record<string, CommandStatus> = { "cmd-1": "applied" };
		const out = applyOrderOverlay(report, [cmd], statuses);

		expect(out).not.toBe(report);
		expect(out.planets[0]!.name).toBe("New Earth");
		expect(out.planets[1]!.name).toBe("Mars");
		// raw report stays untouched
		expect(report.planets[0]!.name).toBe("Earth");
	});

	test("renames on submitting too (in-flight optimistic)", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const cmd: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 1,
			name: "Pending",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "submitting" });
		expect(out.planets[0]!.name).toBe("Pending");
	});

	test("skips draft / invalid / rejected statuses", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const cmd: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 1,
			name: "Tentative",
		};
		for (const status of ["draft", "invalid", "rejected"] as const) {
			const out = applyOrderOverlay(report, [cmd], { "cmd-1": status });
			expect(out.planets[0]!.name).toBe("Earth");
		}
	});

	test("applies on `valid` so the player sees their committed intent immediately", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const cmd: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 1,
			name: "Pending-Sync",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "valid" });
		expect(out.planets[0]!.name).toBe("Pending-Sync");
	});

	test("ignores rename for missing planet (visibility lost)", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const cmd: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 99,
			name: "Phantom",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "applied" });
		expect(out).toBe(report);
	});

	test("placeholder commands pass through", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Earth" })]);
		const cmd: OrderCommand = {
			kind: "placeholder",
			id: "cmd-1",
			label: "noop",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "applied" });
		expect(out).toBe(report);
	});

	test("multiple renames apply in command order", () => {
		const report = makeReport([makePlanet({ number: 1, name: "Old" })]);
		const first: OrderCommand = {
			kind: "planetRename",
			id: "cmd-1",
			planetNumber: 1,
			name: "Mid",
		};
		const second: OrderCommand = {
			kind: "planetRename",
			id: "cmd-2",
			planetNumber: 1,
			name: "Final",
		};
		const out = applyOrderOverlay(report, [first, second], {
			"cmd-1": "applied",
			"cmd-2": "applied",
		});
		expect(out.planets[0]!.name).toBe("Final");
	});

	test("setProductionType rewrites planet.production for valid statuses", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth", production: "Capital" }),
		]);
		const cmd: OrderCommand = {
			kind: "setProductionType",
			id: "cmd-1",
			planetNumber: 1,
			productionType: "DRIVE",
			subject: "",
		};
		for (const status of ["valid", "submitting", "applied"] as const) {
			const out = applyOrderOverlay(report, [cmd], { "cmd-1": status });
			expect(out.planets[0]!.production).toBe("Drive");
		}
	});

	test("setProductionType skips draft / invalid / rejected statuses", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth", production: "Capital" }),
		]);
		const cmd: OrderCommand = {
			kind: "setProductionType",
			id: "cmd-1",
			planetNumber: 1,
			productionType: "DRIVE",
			subject: "",
		};
		for (const status of ["draft", "invalid", "rejected"] as const) {
			const out = applyOrderOverlay(report, [cmd], { "cmd-1": status });
			expect(out.planets[0]!.production).toBe("Capital");
		}
	});

	test("setProductionType applied with subject mirrors the engine's display", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth", production: "Capital" }),
		]);
		const cmd: OrderCommand = {
			kind: "setProductionType",
			id: "cmd-1",
			planetNumber: 1,
			productionType: "SHIP",
			subject: "Scout",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "applied" });
		expect(out.planets[0]!.production).toBe("Scout");
	});

	test("setProductionType + planetRename for the same planet compose", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth", production: "Capital" }),
		]);
		const rename: OrderCommand = {
			kind: "planetRename",
			id: "cmd-rename",
			planetNumber: 1,
			name: "New-Earth",
		};
		const setProd: OrderCommand = {
			kind: "setProductionType",
			id: "cmd-prod",
			planetNumber: 1,
			productionType: "DRIVE",
			subject: "",
		};
		const out = applyOrderOverlay(report, [rename, setProd], {
			"cmd-rename": "applied",
			"cmd-prod": "applied",
		});
		expect(out.planets[0]!.name).toBe("New-Earth");
		expect(out.planets[0]!.production).toBe("Drive");
	});

	test("ignores setProductionType for missing planet (visibility lost)", () => {
		const report = makeReport([
			makePlanet({ number: 1, name: "Earth", production: "Capital" }),
		]);
		const cmd: OrderCommand = {
			kind: "setProductionType",
			id: "cmd-1",
			planetNumber: 99,
			productionType: "DRIVE",
			subject: "",
		};
		const out = applyOrderOverlay(report, [cmd], { "cmd-1": "applied" });
		expect(out).toBe(report);
	});
});

describe("productionDisplayFromCommand", () => {
	const cases: ReadonlyArray<{
		productionType: ProductionType;
		subject: string;
		expected: string;
	}> = [
		{ productionType: "MAT", subject: "", expected: "Material" },
		{ productionType: "CAP", subject: "", expected: "Capital" },
		{ productionType: "DRIVE", subject: "", expected: "Drive" },
		{ productionType: "WEAPONS", subject: "", expected: "Weapons" },
		{ productionType: "SHIELDS", subject: "", expected: "Shields" },
		{ productionType: "CARGO", subject: "", expected: "Cargo" },
		{ productionType: "SCIENCE", subject: "AlphaSci", expected: "AlphaSci" },
		{ productionType: "SHIP", subject: "Scout", expected: "Scout" },
	];
	for (const tc of cases) {
		test(`${tc.productionType} → ${tc.expected}`, () => {
			expect(productionDisplayFromCommand(tc.productionType, tc.subject)).toBe(
				tc.expected,
			);
		});
	}
});