// Interface tests for action-kit — the deepened param-validation module.
// The interface IS the test surface: we drive `parse()` (pure, no ctx) for
// coercion/validation/cross-field, `describe()` for doc metadata, and
// `toHandler()` for the BAD_REQUEST shaping + ctx threading.

import { describe, it, expect } from 'vitest';
import { f, defineAction, groupUserAction, type CoerceResult } from '../src/action-kit';
import type { ApiActionContext } from '../src/api-handler';
import { RETCODE, okResponse } from '../src/types';

const ctx = {} as unknown as ApiActionContext;

function expectErr<T>(r: CoerceResult<T>): { field: string; reason: string } {
    if (r.ok) {
        throw new Error(`expected Err, got Ok(${JSON.stringify(r.value)})`);
    }

    return { field: r.field, reason: r.reason };
}

function expectOk<T>(r: CoerceResult<T>): T {
    if (!r.ok) {
        throw new Error(`expected Ok, got Err(${r.field}: ${r.reason})`);
    }

    return r.value;
}

describe('f.uint — positive integer, missing≠0', () => {
    const spec = defineAction({ name: 't', params: { x: f.uint() }, run: () => okResponse() });
    it('accepts number and numeric string, truncates', () => {
        expect(expectOk(spec.parse({ x: 123 }))).toEqual({ x: 123 });
        expect(expectOk(spec.parse({ x: '456' }))).toEqual({ x: 456 });
        expect(expectOk(spec.parse({ x: 5.7 }))).toEqual({ x: 5 });
    });
    it('rejects missing / 0 / negative / garbage, naming the field', () => {
        expect(expectErr(spec.parse({})).field).toBe('x');
        expect(expectErr(spec.parse({})).reason).toBe('is required');
        expect(expectErr(spec.parse({ x: 0 })).field).toBe('x'); // 0 is not a valid id
        expect(expectErr(spec.parse({ x: -3 })).field).toBe('x');
        expect(expectErr(spec.parse({ x: 'abc' })).field).toBe('x');
    });
});

describe('f.int({min:0}).default — the duration / unmute fix', () => {
    const spec = defineAction({
        name: 't',
        params: { d: f.int({ min: 0 }).default(1800) },
        run: () => okResponse(),
    });
    it('missing ⇒ default; present 0 ⇒ 0 (not the default); negative ⇒ err', () => {
        expect(expectOk(spec.parse({}))).toEqual({ d: 1800 });
        expect(expectOk(spec.parse({ d: 0 }))).toEqual({ d: 0 }); // the bug the old `|| 1800` had
        expect(expectErr(spec.parse({ d: -1 })).field).toBe('d');
    });
    it('present garbage is an error, not a silent fallback', () => {
        expect(expectErr(spec.parse({ d: 'abc' })).field).toBe('d');
    });
});

describe('f.messageId — non-zero integer, negatives allowed', () => {
    const spec = defineAction({
        name: 't',
        params: { id: f.messageId() },
        run: () => okResponse(),
    });
    it('accepts negative ids (signed int32 hash), rejects 0 and garbage', () => {
        expect(expectOk(spec.parse({ id: -2147483648 }))).toEqual({ id: -2147483648 });
        expect(expectOk(spec.parse({ id: 123 }))).toEqual({ id: 123 });
        expect(expectErr(spec.parse({ id: 0 })).reason).toBe('must not be 0');
        expect(expectErr(spec.parse({ id: 'x' })).field).toBe('id');
    });
});

describe('f.bool / f.string / f.enum', () => {
    it('bool synonyms', () => {
        const s = defineAction({ name: 't', params: { b: f.bool() }, run: () => okResponse() });
        expect(expectOk(s.parse({ b: 'on' }))).toEqual({ b: true });
        expect(expectOk(s.parse({ b: 0 }))).toEqual({ b: false });
        expect(expectErr(s.parse({ b: 'maybe' })).field).toBe('b');
    });
    it('string allowEmpty toggle', () => {
        const s = defineAction({
            name: 't',
            params: { c: f.string({ allowEmpty: false }) },
            run: () => okResponse(),
        });
        expect(expectErr(s.parse({ c: '' })).field).toBe('c');
        expect(expectOk(s.parse({ c: 'x' }))).toEqual({ c: 'x' });
    });
    it('enum literal set', () => {
        const s = defineAction({
            name: 't',
            params: { e: f.enum('a', 'b') },
            run: () => okResponse(),
        });
        expect(expectOk(s.parse({ e: 'a' }))).toEqual({ e: 'a' });
        expect(expectErr(s.parse({ e: 'c' })).field).toBe('e');
    });
});

describe('f.array(...).nonEmpty — per-element + non-empty', () => {
    const spec = defineAction({
        name: 't',
        params: { ids: f.array(f.uint()).nonEmpty() },
        run: () => okResponse(),
    });
    it('accepts a non-empty uint array', () => {
        expect(expectOk(spec.parse({ ids: [1, 2, 3] }))).toEqual({ ids: [1, 2, 3] });
    });
    it('rejects empty and names the bad element index', () => {
        expect(expectErr(spec.parse({ ids: [] })).field).toBe('ids');
        expect(expectErr(spec.parse({ ids: [1, 'x'] })).field).toBe('ids[1]');
    });
});

describe('f.object — open JSON object', () => {
    const spec = defineAction({
        name: 't',
        params: { value: f.object() },
        run: () => okResponse(),
    });

    it('preserves nested and unknown fields', () => {
        const value = { identity: { id: 'opaque' }, future: [1, null, { enabled: true }] };
        expect(expectOk(spec.parse({ value })).value).toBe(value);
        expect(f.object().toJsonSchema()).toEqual({ type: 'object', additionalProperties: true });
    });

    it.each([null, [], 'text', 1, false])('rejects non-object %j', (value) => {
        expect(expectErr(spec.parse({ value })).field).toBe('value');
    });

    it('uses the normal required and optional field policies', () => {
        expect(expectErr(spec.parse({})).reason).toBe('is required');
        const optional = defineAction({
            name: 't',
            params: { value: f.object().optional() },
            run: () => okResponse(),
        });
        expect(expectOk(optional.parse({}))).toEqual({ value: undefined });
        expect(expectErr(optional.parse({ value: null })).field).toBe('value');
    });
});

describe('f.textOrObjectArray — literal text and upstream rich items', () => {
    const spec = defineAction({
        name: 't',
        params: { content: f.textOrObjectArray() },
        run: () => okResponse(),
    });

    it.each(['[]', '[1,2]', '[{"type":0,"content":"hello"}]', ' \n中文 '])(
        'preserves literal string %j without decoding or trimming it',
        (content) => {
            expect(expectOk(spec.parse({ content })).content).toBe(content);
        },
    );

    it('preserves the original object array and unknown fields', () => {
        const content = [{ type: 0, content: 'hello', future: { values: [null, 1] } }];
        expect(expectOk(spec.parse({ content })).content).toBe(content);
    });

    it.each(
        ['', [], null, 1, false, {}, [null], [1], [[]], [{ type: 0 }, 'text']].map((content) => ({
            content,
        })),
    )('rejects invalid rich content $content at the named field', ({ content }) => {
        expect(expectErr(spec.parse({ content })).field).toBe('content');
    });

    it('retains required and optional field policies', () => {
        expect(expectErr(spec.parse({})).reason).toBe('is required');
        const optional = defineAction({
            name: 't',
            params: { content: f.textOrObjectArray().optional() },
            run: () => okResponse(),
        });
        expect(expectOk(optional.parse({}))).toEqual({ content: undefined });
        expect(expectErr(optional.parse({ content: null })).field).toBe('content');
    });

    it('describes text and object arrays without OneBot message semantics', () => {
        const field = f.textOrObjectArray();
        expect(field.doc.type).toBe('string | object[]');
        expect(field.toJsonSchema()).toEqual({
            anyOf: [
                { type: 'string', minLength: 1 },
                {
                    type: 'array',
                    minItems: 1,
                    items: { type: 'object', additionalProperties: true },
                },
            ],
        });
    });
});

describe('f.message — union passthrough + JSON-array string', () => {
    const spec = defineAction({ name: 't', params: { m: f.message() }, run: () => okResponse() });
    it('parses a JSON-array string, passes plain string / array through', () => {
        expect(expectOk(spec.parse({ m: '[{"type":"text","data":{"text":"hi"}}]' })).m).toEqual([
            { type: 'text', data: { text: 'hi' } },
        ]);
        expect(expectOk(spec.parse({ m: 'hello' })).m).toBe('hello');
        expect(expectOk(spec.parse({ m: [{ type: 'face' }] })).m).toEqual([{ type: 'face' }]);
    });
    it('required when missing', () => {
        expect(expectErr(spec.parse({})).reason).toBe('is required');
    });
});

describe('optional fields', () => {
    const spec = defineAction({
        name: 't',
        params: { x: f.uint().optional() },
        run: () => okResponse(),
    });
    it('missing ⇒ undefined value, present-invalid ⇒ err', () => {
        expect(expectOk(spec.parse({}))).toEqual({ x: undefined });
        expect(expectErr(spec.parse({ x: 'abc' })).field).toBe('x');
    });
});

describe('cross-field rules', () => {
    const spec = defineAction({
        name: 'set_msg_emoji_like',
        params: {
            message_id: f.uint().optional(),
            group_id: f.uint().optional(),
            user_id: f.uint().optional(),
            emoji_id: f.uint(),
        },
        rules: (r) => [r.exactlyOneOf('message_id', ['group_id', 'user_id'])],
        run: () => okResponse(),
    });
    it('passes when exactly one locator group present', () => {
        expect(spec.parse({ message_id: 5, emoji_id: 1 }).ok).toBe(true);
        expect(spec.parse({ group_id: 9, user_id: 8, emoji_id: 1 }).ok).toBe(true);
    });
    it('fails when zero or both groups present', () => {
        expect(expectErr(spec.parse({ emoji_id: 1 })).reason).toContain('exactly one of');
        expect(
            expectErr(spec.parse({ message_id: 5, group_id: 9, user_id: 8, emoji_id: 1 })).reason,
        ).toContain('exactly one of');
    });
    it('field errors take priority over rule errors (per-field first)', () => {
        expect(expectErr(spec.parse({ emoji_id: 0 })).field).toBe('emoji_id');
    });
});

describe('toHandler — BAD_REQUEST shaping + ctx threading', () => {
    const spec = groupUserAction({
        name: 'set_group_ban',
        params: { duration: f.int({ min: 0 }).default(1800) },
        run: (p) => okResponse({ seen: [p.group_id, p.user_id, p.duration] }),
    });
    it('success path returns run output with typed/defaulted params', async () => {
        const res = await spec.toHandler(ctx)({ group_id: 10, user_id: 20 });
        expect(res).toMatchObject({ status: 'ok', retcode: 0, data: { seen: [10, 20, 1800] } });
    });
    it('bad params ⇒ BAD_REQUEST naming the field (not INTERNAL_ERROR)', async () => {
        const res = await spec.toHandler(ctx)({ user_id: 20 }); // missing group_id
        expect(res.retcode).toBe(RETCODE.BAD_REQUEST);
        expect(res.status).toBe('failed');
        expect(res.wording).toContain('group_id');
    });
});

describe('run only sees declared fields', () => {
    it('lets a declared alias through and ignores undeclared keys', async () => {
        const spec = defineAction({
            name: 't',
            params: { user_id: f.uint(), longNick: f.string().optional() },
            run: (p) => okResponse({ extra: (p.longNick ?? null) as never }),
        });
        const res = await spec.toHandler(ctx)({ user_id: 1, longNick: 'hi', undeclared: 1 });
        expect(res).toMatchObject({ status: 'ok', data: { extra: 'hi' } });
    });

    it('rejects garbage on a declared int instead of treating it as 0', async () => {
        const spec = defineAction({
            name: 't',
            params: { group_id: f.int({ min: 0 }).optional() },
            run: (p) => okResponse({ group_id: p.group_id ?? 0 }),
        });
        const res = await spec.toHandler(ctx)({ group_id: 'nope' });
        expect(res.retcode).toBe(RETCODE.BAD_REQUEST);
        expect(res.wording).toContain('group_id');
    });
});

describe('toJsonSchema / inputSchema (for the MCP)', () => {
    it('emits a JSON Schema fragment per coercer', () => {
        expect(f.uint().toJsonSchema()).toEqual({ type: 'integer', minimum: 1 });
        expect(f.messageId().toJsonSchema()).toEqual({
            type: 'integer',
            not: { const: 0 },
            'x-role': 'message_id',
        });
        expect(f.int({ min: 0 }).default(1800).toJsonSchema()).toEqual({
            type: 'integer',
            minimum: 0,
            default: 1800,
        });
        expect(f.string({ allowEmpty: false }).toJsonSchema()).toEqual({
            type: 'string',
            minLength: 1,
        });
        expect(f.bool().toJsonSchema()).toEqual({ type: 'boolean' });
        expect(f.enum('a', 'b').toJsonSchema()).toEqual({ enum: ['a', 'b'] });
        expect(f.array(f.uint()).nonEmpty().toJsonSchema()).toEqual({
            type: 'array',
            items: { type: 'integer', minimum: 1 },
            minItems: 1,
        });
        expect(f.uint().describe('群号').toJsonSchema()).toEqual({
            type: 'integer',
            minimum: 1,
            description: '群号',
        });
    });

    it('composes an action inputSchema (object + required + defaults)', () => {
        const spec = groupUserAction({
            name: 'set_group_ban',
            params: { duration: f.int({ min: 0 }).default(1800) },
            run: () => okResponse(),
        });
        const { inputSchema } = spec.describe();
        expect(inputSchema).toMatchObject({
            type: 'object',
            additionalProperties: true,
            required: ['group_id', 'user_id'],
            properties: {
                group_id: { type: 'integer', minimum: 1 },
                user_id: { type: 'integer', minimum: 1 },
                duration: { type: 'integer', minimum: 0, default: 1800 },
            },
        });
    });
});

describe('describe — doc metadata for self-generated docs (D4)', () => {
    const spec = groupUserAction({
        name: ['set_group_ban', 'ban'],
        summary: 'Mute a member',
        params: { duration: f.int({ min: 0 }).default(1800).describe('seconds; 0 unmutes') },
        run: () => okResponse(),
    });
    it('exposes name, aliases, and per-param metadata (incl. preset-injected fields)', () => {
        const doc = spec.describe();
        expect(doc.name).toBe('set_group_ban');
        expect(doc.aliases).toEqual(['ban']);
        expect(doc.summary).toBe('Mute a member');
        const names = doc.params.map((p) => p.name);
        expect(names).toEqual(['group_id', 'user_id', 'duration']); // presets surfaced
        const duration = doc.params.find((p) => p.name === 'duration');
        expect(duration).toMatchObject({
            type: 'int',
            required: false,
            default: 1800,
            desc: 'seconds; 0 unmutes',
        });
    });

    it('stamps semantic roles on preset-injected fields (group_id / member-like user_id)', () => {
        const doc = spec.describe();
        expect(doc.params.find((p) => p.name === 'group_id')?.role).toBe('group_id');
        // In a group action the user_id is a member of that group → member_id role.
        expect(doc.params.find((p) => p.name === 'user_id')?.role).toBe('member_id');
        expect(doc.stream).toBeUndefined();
    });
});

describe('FieldRole — semantic constructors and .role()', () => {
    it('semantic constructors coerce like their primitive but carry a role', () => {
        expect(f.groupId().doc).toMatchObject({ type: 'uint', role: 'group_id' });
        expect(f.userId().doc).toMatchObject({ type: 'uint', role: 'user_id' });
        expect(f.memberId().doc).toMatchObject({ type: 'uint', role: 'member_id' });
        expect(f.image().doc).toMatchObject({ type: 'string', role: 'image' });
        expect(f.duration().doc).toMatchObject({ type: 'int', role: 'duration' });
        // Coercion is unchanged: a groupId still validates exactly like a uint.
        const g = f.groupId().coerce('123', 'group_id');
        expect(g.ok && g.value).toBe(123);
        const bad = f.groupId().coerce('0', 'group_id');
        expect(bad.ok).toBe(false);
    });

    it('.role() overrides/stamps a role and survives optional()/default()', () => {
        expect(f.uint().role('group_id').doc.role).toBe('group_id');
        expect(f.uint().role('group_id').optional().doc.role).toBe('group_id');
        expect(f.string().role('file').default('').doc.role).toBe('file');
    });

    it("surfaces role through describe() params and toJsonSchema's x-role", () => {
        const spec = defineAction({
            name: 'demo',
            params: { gid: f.groupId(), pic: f.image() },
            run: () => okResponse(),
        });
        const doc = spec.describe();
        expect(doc.params.find((p) => p.name === 'gid')?.role).toBe('group_id');
        expect(f.groupId().toJsonSchema()).toMatchObject({ 'x-role': 'group_id' });
    });
});