import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import * as fs from 'node:fs';
import * as path from 'node:path';
import * as os from 'node:os';
import { resolveInput } from './input-resolver.js';
/**
 * Helper to create a valid dashboard JSON object
 */
function makeDashboard(projectName = 'test-project') {
    return {
        version: '1.0.0',
        project: { name: projectName, description: 'Test', languages: [], frameworks: [] },
        nodes: [{ id: '1', type: 'file', name: 'index.ts' }],
        edges: [{ source: '1', target: '1', type: 'imports' }],
    };
}
/**
 * Helper to create a meta.json object
 */
function makeMeta() {
    return {
        lastAnalyzedAt: '2024-01-01T00:00:00.000Z',
        gitCommitHash: 'abc123',
        version: '1.0.0',
        analyzedFiles: 10,
    };
}
describe('resolveInput - recursive directory scanning', () => {
    let tmpDir;
    beforeEach(() => {
        tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'input-resolver-test-'));
    });
    afterEach(() => {
        fs.rmSync(tmpDir, { recursive: true, force: true });
    });
    describe('handleFlatDirectory - recursive child directory scanning (Task 40.1)', () => {
        it('loads JSON files from nested child directories', () => {
            // Create structure:
            // tmpDir/
            //   top-level.json
            //   child-a/
            //     graph-a.json
            //   child-b/
            //     graph-b.json
            fs.writeFileSync(path.join(tmpDir, 'top-level.json'), JSON.stringify(makeDashboard('top')));
            fs.mkdirSync(path.join(tmpDir, 'child-a'));
            fs.writeFileSync(path.join(tmpDir, 'child-a', 'graph-a.json'), JSON.stringify(makeDashboard('project-a')));
            fs.mkdirSync(path.join(tmpDir, 'child-b'));
            fs.writeFileSync(path.join(tmpDir, 'child-b', 'graph-b.json'), JSON.stringify(makeDashboard('project-b')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            // Should have entries for root, child-a, and child-b
            expect(result.manifest.length).toBe(3);
            const dirNames = result.manifest.map(e => e.dirName);
            const baseName = path.basename(tmpDir);
            expect(dirNames).toContain(baseName);
            expect(dirNames).toContain(`${baseName}/child-a`);
            expect(dirNames).toContain(`${baseName}/child-b`);
        });
        it('discovers deeply nested directories (3+ levels)', () => {
            // Create structure:
            // tmpDir/
            //   level1/
            //     level2/
            //       level3/
            //         deep.json
            const deepPath = path.join(tmpDir, 'level1', 'level2', 'level3');
            fs.mkdirSync(deepPath, { recursive: true });
            fs.writeFileSync(path.join(deepPath, 'deep.json'), JSON.stringify(makeDashboard('deep-project')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            const baseName = path.basename(tmpDir);
            const dirNames = result.manifest.map(e => e.dirName);
            expect(dirNames).toContain(`${baseName}/level1/level2/level3`);
            // Verify file mapping has correct URL path
            const expectedKey = `${baseName}/level1/level2/level3/deep.json`;
            expect(result.fileMapping[expectedKey]).toBe(path.join(deepPath, 'deep.json'));
        });
        it('skips common non-source directories', () => {
            // Create structure with skippable dirs
            const skipDirs = ['node_modules', '.git', 'dist', 'build', '.next', '.cache', '__pycache__', '.turbo', 'target', 'obj', '.understand-anything'];
            for (const dir of skipDirs) {
                const dirPath = path.join(tmpDir, dir);
                fs.mkdirSync(dirPath);
                fs.writeFileSync(path.join(dirPath, 'graph.json'), JSON.stringify(makeDashboard(`skip-${dir}`)));
            }
            // Add one valid directory
            fs.mkdirSync(path.join(tmpDir, 'valid-dir'));
            fs.writeFileSync(path.join(tmpDir, 'valid-dir', 'graph.json'), JSON.stringify(makeDashboard('valid')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            // Should only find the valid-dir, not any of the skipped dirs
            const baseName = path.basename(tmpDir);
            const dirNames = result.manifest.map(e => e.dirName);
            for (const dir of skipDirs) {
                expect(dirNames).not.toContain(`${baseName}/${dir}`);
            }
            expect(dirNames).toContain(`${baseName}/valid-dir`);
        });
        it('preserves correct URL paths in file mapping for nested files', () => {
            // Create structure:
            // tmpDir/
            //   root.json
            //   sub/
            //     nested.json
            fs.writeFileSync(path.join(tmpDir, 'root.json'), JSON.stringify(makeDashboard('root-proj')));
            fs.mkdirSync(path.join(tmpDir, 'sub'));
            fs.writeFileSync(path.join(tmpDir, 'sub', 'nested.json'), JSON.stringify(makeDashboard('nested-proj')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            const baseName = path.basename(tmpDir);
            // Top-level file mapping
            expect(result.fileMapping[`${baseName}/root.json`]).toBe(path.join(tmpDir, 'root.json'));
            // Nested file mapping
            expect(result.fileMapping[`${baseName}/sub/nested.json`]).toBe(path.join(tmpDir, 'sub', 'nested.json'));
        });
        it('creates separate manifest entries per child directory', () => {
            // Create structure with multiple children
            fs.mkdirSync(path.join(tmpDir, 'alpha'));
            fs.writeFileSync(path.join(tmpDir, 'alpha', 'a1.json'), JSON.stringify(makeDashboard('alpha-1')));
            fs.writeFileSync(path.join(tmpDir, 'alpha', 'a2.json'), JSON.stringify(makeDashboard('alpha-2')));
            fs.mkdirSync(path.join(tmpDir, 'beta'));
            fs.writeFileSync(path.join(tmpDir, 'beta', 'b1.json'), JSON.stringify(makeDashboard('beta-1')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            const baseName = path.basename(tmpDir);
            const alphaEntry = result.manifest.find(e => e.dirName === `${baseName}/alpha`);
            const betaEntry = result.manifest.find(e => e.dirName === `${baseName}/beta`);
            expect(alphaEntry).toBeDefined();
            expect(alphaEntry.graphFiles).toHaveLength(2);
            expect(betaEntry).toBeDefined();
            expect(betaEntry.graphFiles).toHaveLength(1);
        });
    });
    describe('resolveInput - recursive meta.json detection (Task 40.2)', () => {
        it('finds meta.json in deeply nested subdirectories', () => {
            // Create structure:
            // tmpDir/
            //   deep/
            //     nested/
            //       meta.json
            //       graph.json
            const nestedPath = path.join(tmpDir, 'deep', 'nested');
            fs.mkdirSync(nestedPath, { recursive: true });
            fs.writeFileSync(path.join(nestedPath, 'meta.json'), JSON.stringify(makeMeta()));
            fs.writeFileSync(path.join(nestedPath, 'graph.json'), JSON.stringify(makeDashboard('nested-project')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            // Should treat deep/nested as a project directory
            expect(result.manifest.length).toBe(1);
            // The dirName should be the relative path
            const dirName = result.manifest[0].dirName.replace(/\\/g, '/');
            expect(dirName).toContain('nested');
        });
        it('finds multiple meta.json directories at different nesting levels', () => {
            // Create structure:
            // tmpDir/
            //   project-a/
            //     meta.json
            //     graph-a.json
            //   deep/
            //     project-b/
            //       meta.json
            //       graph-b.json
            fs.mkdirSync(path.join(tmpDir, 'project-a'));
            fs.writeFileSync(path.join(tmpDir, 'project-a', 'meta.json'), JSON.stringify(makeMeta()));
            fs.writeFileSync(path.join(tmpDir, 'project-a', 'graph-a.json'), JSON.stringify(makeDashboard('proj-a')));
            const deepPath = path.join(tmpDir, 'deep', 'project-b');
            fs.mkdirSync(deepPath, { recursive: true });
            fs.writeFileSync(path.join(deepPath, 'meta.json'), JSON.stringify(makeMeta()));
            fs.writeFileSync(path.join(deepPath, 'graph-b.json'), JSON.stringify(makeDashboard('proj-b')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            expect(result.manifest.length).toBe(2);
        });
        it('directories with meta.json are treated as project directories', () => {
            // Create a directory with meta.json - should use meta.json data, not synthesize
            fs.mkdirSync(path.join(tmpDir, 'my-project'));
            const meta = makeMeta();
            fs.writeFileSync(path.join(tmpDir, 'my-project', 'meta.json'), JSON.stringify(meta));
            fs.writeFileSync(path.join(tmpDir, 'my-project', 'graph.json'), JSON.stringify(makeDashboard('my-proj')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            expect(result.manifest[0].meta.gitCommitHash).toBe('abc123');
            expect(result.manifest[0].meta.version).toBe('1.0.0');
            expect(result.manifest[0].meta.analyzedFiles).toBe(10);
        });
        it('falls back to recursive flat scanning when no meta.json found anywhere', () => {
            // Create structure with no meta.json at all
            fs.mkdirSync(path.join(tmpDir, 'flat-a'));
            fs.writeFileSync(path.join(tmpDir, 'flat-a', 'graph.json'), JSON.stringify(makeDashboard('flat-proj')));
            fs.mkdirSync(path.join(tmpDir, 'flat-b'));
            fs.writeFileSync(path.join(tmpDir, 'flat-b', 'data.json'), JSON.stringify(makeDashboard('flat-proj-2')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            // Should use synthesized meta (version 0.0.0)
            for (const entry of result.manifest) {
                expect(entry.meta.version).toBe('0.0.0');
                expect(entry.meta.gitCommitHash).toBe('');
            }
        });
        it('skips non-source directories when searching for meta.json', () => {
            // Put meta.json inside node_modules - should be skipped
            fs.mkdirSync(path.join(tmpDir, 'node_modules', 'some-pkg'), { recursive: true });
            fs.writeFileSync(path.join(tmpDir, 'node_modules', 'some-pkg', 'meta.json'), JSON.stringify(makeMeta()));
            fs.writeFileSync(path.join(tmpDir, 'node_modules', 'some-pkg', 'graph.json'), JSON.stringify(makeDashboard('pkg')));
            // Add a valid flat directory
            fs.mkdirSync(path.join(tmpDir, 'valid'));
            fs.writeFileSync(path.join(tmpDir, 'valid', 'graph.json'), JSON.stringify(makeDashboard('valid-proj')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            // Should NOT find the node_modules project, should fall through to flat scanning
            const dirNames = result.manifest.map(e => e.dirName);
            for (const name of dirNames) {
                expect(name).not.toContain('node_modules');
            }
        });
    });
    describe('preserves existing behavior', () => {
        it('directory with meta.json at root is still treated as project directory', () => {
            // tmpDir itself has meta.json
            fs.writeFileSync(path.join(tmpDir, 'meta.json'), JSON.stringify(makeMeta()));
            fs.writeFileSync(path.join(tmpDir, 'graph.json'), JSON.stringify(makeDashboard('root-proj')));
            const result = resolveInput(tmpDir);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            expect(result.manifest.length).toBe(1);
            expect(result.manifest[0].meta.gitCommitHash).toBe('abc123');
        });
        it('single file input still works', () => {
            const filePath = path.join(tmpDir, 'single.json');
            fs.writeFileSync(filePath, JSON.stringify(makeDashboard('single-proj')));
            const result = resolveInput(filePath);
            expect(result.success).toBe(true);
            if (!result.success)
                return;
            expect(result.manifest.length).toBe(1);
            expect(result.manifest[0].graphFiles[0].projectName).toBe('single-proj');
        });
    });
});