const fs = require("fs");
const path = require("path");
const vm = require("vm");
const assert = require("assert");

const rootDir = path.resolve(__dirname, "..", "..");

const loadModule = (relativePath, injected = {}) => {
    const filePath = path.join(rootDir, relativePath);
    let source = fs.readFileSync(filePath, "utf8");

    source = source.replace(/import[\s\S]*?from\s+"[^"]+";\n?/g, "");
    source = source.replace(
        /export default async function\s+(\w+)\s*\(/,
        "async function $1("
    );
    source = source.replace(/export const\s+/g, "const ");
    source = source.replace(
        /export default\s+(\w+);/g,
        "module.exports.default = $1;"
    );
    source +=
        '\nif (typeof ApiProxy !== "undefined" && !module.exports.default) module.exports.default = ApiProxy;\n';

    const context = {
        module: { exports: {} },
        exports: {},
        require,
        process,
        console: { log: () => {}, error: () => {} },
        ...injected
    };

    vm.runInNewContext(source, context, { filename: filePath });
    return context.module.exports;
};

const createNextConnectMock = () => {
    const router = {
        handler: null,
        use: () => {},
        get(fn) {
            this.handler = fn;
        }
    };
    return () => router;
};

const createRes = () => {
    const state = { statusCode: null, jsonBody: undefined };
    return {
        state,
        status(code) {
            state.statusCode = code;
            return this;
        },
        json(payload) {
            state.jsonBody = payload;
            return payload;
        }
    };
};

const tests = [];
const test = (name, fn) => tests.push({ name, fn });

test("deleteblobcase rejects missing hash with 400", async () => {
    const calls = [];
    const mod = loadModule("pages/api/file/deleteblobcase.js", {
        hashAPIPath: () => "&hash=expected",
        deleteBlobCase: async (...args) => {
            calls.push(args);
            return true;
        },
        nextConnect: createNextConnectMock(),
        middleware: () => {}
    });

    const req = { query: { container: "c1", casefolderID: "case-1" } };
    const res = createRes();
    await mod.default.handler(req, res);
    assert.strictEqual(res.state.statusCode, 400);
    assert.strictEqual(calls.length, 0);
});

test("deleteblobrep rejects missing hash with 400", async () => {
    const calls = [];
    const mod = loadModule("pages/api/file/deleteblobrep.js", {
        hashAPIPath: () => "&hash=expected",
        deleteBlobRep: async (...args) => {
            calls.push(args);
            return true;
        },
        nextConnect: createNextConnectMock(),
        middleware: () => {}
    });

    const req = {
        query: { container: "c1", casefolderID: "case-1", repfile: "r.pdf" }
    };
    const res = createRes();
    await mod.default.handler(req, res);
    assert.strictEqual(res.state.statusCode, 400);
    assert.strictEqual(calls.length, 0);
});

test("createcaseinvolvement_api rejects missing required body values with 400", async () => {
    const mod = loadModule("pages/api/file/createcaseinvolvement_api.js", {
        getToken: async () => ({ access_token: "token" }),
        axios: async () => ({ data: { ok: true } }),
        consoleLogger: () => {}
    });

    const req = { body: {} };
    const res = createRes();
    await mod.default(req, res);
    assert.strictEqual(res.state.statusCode, 400);
});

test("createrepinvolvement_api rejects missing required body values with 400", async () => {
    const mod = loadModule("pages/api/file/createrepinvolvement_api.js", {
        getToken: async () => ({ access_token: "token" }),
        axios: async () => ({ data: { ok: true } }),
        consoleLogger: () => {}
    });

    const req = { body: {} };
    const res = createRes();
    await mod.default(req, res);
    assert.strictEqual(res.state.statusCode, 400);
});

test("deleteblobcase valid hash returns 200", async () => {
    const mod = loadModule("pages/api/file/deleteblobcase.js", {
        hashAPIPath: () => "&hash=expected",
        deleteBlobCase: async () => ({ ok: true }),
        nextConnect: createNextConnectMock(),
        middleware: () => {}
    });

    const req = {
        query: { container: "c1", casefolderID: "case-1", hash: "expected" }
    };
    const res = createRes();
    await mod.default.handler(req, res);
    assert.strictEqual(res.state.statusCode, 200);
});

test("createcaseinvolvement_api with valid body returns 200", async () => {
    const mod = loadModule("pages/api/file/createcaseinvolvement_api.js", {
        getToken: async () => ({ access_token: "token" }),
        CryptoJS: {
            HmacSHA256: () => ({ toString: () => "signed" }),
            enc: { Hex: { parse: () => "" } }
        },
        axios: async () => ({ data: { ok: true } }),
        consoleLogger: () => {}
    });

    const req = { body: { contactid: "c1", incidentid: "i1" } };
    const res = createRes();
    await mod.default(req, res);
    assert.strictEqual(res.state.statusCode, 200);
});

test("createrepinvolvement_api with valid body returns 200", async () => {
    const mod = loadModule("pages/api/file/createrepinvolvement_api.js", {
        getToken: async () => ({ access_token: "token" }),
        CryptoJS: {
            HmacSHA256: () => ({ toString: () => "signed" }),
            enc: { Hex: { parse: () => "" } }
        },
        axios: async () => ({ data: { ok: true } }),
        consoleLogger: () => {}
    });

    const req = { body: { contactid: "c1", incidentid: "i1" } };
    const res = createRes();
    await mod.default(req, res);
    assert.strictEqual(res.state.statusCode, 200);
});

const run = async () => {
    let passed = 0;
    for (const t of tests) {
        await t.fn();
        passed += 1;
    }
    console.log(
        `Phase 13 behavioural tests passed (${passed}/${tests.length}).`
    );
};

run().catch((error) => {
    console.error(error);
    process.exit(1);
});