import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import { deriveBankId, ensureBankMission } from './bank.js';
import { makeConfig } from './test-helpers.js';

describe('deriveBankId', () => {
    const originalEnv = { ...process.env };

    afterEach(() => {
        process.env = { ...originalEnv };
    });

    it('returns default bank name in static mode', () => {
        expect(deriveBankId(makeConfig(), '/home/user/project')).toBe('opencode');
    });

    it('returns configured bankId in static mode', () => {
        const config = makeConfig({ bankId: 'my-bank' });
        expect(deriveBankId(config, '/home/user/project')).toBe('my-bank');
    });

    it('adds prefix in static mode', () => {
        const config = makeConfig({ bankIdPrefix: 'dev', bankId: 'my-bank' });
        expect(deriveBankId(config, '/home/user/project')).toBe('dev-my-bank');
    });

    it('composes from granularity fields in dynamic mode', () => {
        const config = makeConfig({
            dynamicBankId: true,
            dynamicBankGranularity: ['agent', 'project'],
            agentName: 'opencode',
        });
        expect(deriveBankId(config, '/home/user/my-project')).toBe('opencode::my-project');
    });

    it('uses default granularity when not specified', () => {
        const config = makeConfig({
            dynamicBankId: true,
            dynamicBankGranularity: [],
        });
        expect(deriveBankId(config, '/home/user/proj')).toBe('opencode::proj');
    });

    it('URL-encodes special characters', () => {
        const config = makeConfig({
            dynamicBankId: true,
            dynamicBankGranularity: ['project'],
        });
        expect(deriveBankId(config, '/home/user/my project')).toBe('my%20project');
    });

    it('uses channel/user from env vars', () => {
        process.env.HINDSIGHT_CHANNEL_ID = 'slack-general';
        process.env.HINDSIGHT_USER_ID = 'user123';
        const config = makeConfig({
            dynamicBankId: true,
            dynamicBankGranularity: ['agent', 'channel', 'user'],
        });
        expect(deriveBankId(config, '/home/user/proj')).toBe('opencode::slack-general::user123');
    });

    it('uses defaults for missing env vars', () => {
        delete process.env.HINDSIGHT_CHANNEL_ID;
        delete process.env.HINDSIGHT_USER_ID;
        const config = makeConfig({
            dynamicBankId: true,
            dynamicBankGranularity: ['channel', 'user'],
        });
        expect(deriveBankId(config, '/home/user/proj')).toBe('default::anonymous');
    });

    it('adds prefix in dynamic mode', () => {
        const config = makeConfig({
            dynamicBankId: true,
            bankIdPrefix: 'dev',
            dynamicBankGranularity: ['agent'],
        });
        expect(deriveBankId(config, '/home/user/proj')).toBe('dev-opencode');
    });
});

describe('ensureBankMission', () => {
    it('calls createBank on first use', async () => {
        const client = { createBank: vi.fn().mockResolvedValue({}) } as any;
        const missionsSet = new Set<string>();
        const config = makeConfig({ bankMission: 'Test mission' });

        await ensureBankMission(client, 'test-bank', config, missionsSet);

        expect(client.createBank).toHaveBeenCalledWith('test-bank', {
            reflectMission: 'Test mission',
            retainMission: undefined,
        });
        expect(missionsSet.has('test-bank')).toBe(true);
    });

    it('skips if already set', async () => {
        const client = { createBank: vi.fn() } as any;
        const missionsSet = new Set(['test-bank']);
        const config = makeConfig({ bankMission: 'Test mission' });

        await ensureBankMission(client, 'test-bank', config, missionsSet);

        expect(client.createBank).not.toHaveBeenCalled();
    });

    it('skips if no mission configured', async () => {
        const client = { createBank: vi.fn() } as any;
        const missionsSet = new Set<string>();
        const config = makeConfig({ bankMission: '' });

        await ensureBankMission(client, 'test-bank', config, missionsSet);

        expect(client.createBank).not.toHaveBeenCalled();
    });

    it('does not throw on client error', async () => {
        const client = { createBank: vi.fn().mockRejectedValue(new Error('Network error')) } as any;
        const missionsSet = new Set<string>();
        const config = makeConfig({ bankMission: 'Mission' });

        await expect(
            ensureBankMission(client, 'test-bank', config, missionsSet),
        ).resolves.not.toThrow();
        expect(missionsSet.has('test-bank')).toBe(false);
    });

    it('passes retainMission when configured', async () => {
        const client = { createBank: vi.fn().mockResolvedValue({}) } as any;
        const missionsSet = new Set<string>();
        const config = makeConfig({ bankMission: 'Reflect', retainMission: 'Extract carefully' });

        await ensureBankMission(client, 'test-bank', config, missionsSet);

        expect(client.createBank).toHaveBeenCalledWith('test-bank', {
            reflectMission: 'Reflect',
            retainMission: 'Extract carefully',
        });
    });
});